1. food and drink
2. desserts and baking

no; ‘763,089.
7
, PATENTED' JUNE 21, 1904..
W. B. CRANE, DEC’D.
'
A. B. Jonson. Anu'm'iswumon.
APPARATUS FOR THE PRODUCTION OF ICE.
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APPLICATION npnn SEPT.18,'1899.
I0 MODEL.
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No. 763,089.
PATENTED JUNE 21', 1904.’
W. E. GRANRDEG'U
A. n. Jonson. Anmms'rmwon.
APPARATUS FOR THE PRODUCTION 0]? ICE.
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no MODEL.
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Inn-763,089. ‘
PATENTED JUNE 21, 1904.
W. E. CRANE, DEG’D.
A. R; JOHNSON. ADMINISTRATOR.
APPARATUS FOR THE PRODUCTION OF ICE.
APPLICATION FILED SEPT.1B, 1899-
NO MODEL.
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?atented June 21, 1904.
1 No. 763,089.
UNITED STATES
PATENT OFFICE.
WALTER ELIPHALET‘ORANE, OF MINNEAPOLIS, MINNESOTA; A. ROLAND
JOHNSON ADMINISTRATOR OF SAIDORANE, DECEASED.
APPARATUS FOR THE PRODUCTION OF ICE.
SPECIFICATION forming part of Letters Patent No. 763,089, dated June 21, 1904.
Application ?led September 18, 1899. Serial No. 730,911. (No model.)
pf my invention may be brie?y stated, as fol- 50
To all, whom it may concern.
Be it known that I, WALTER ELIPHALET
CRANE, a citizen of the United States, resid
ing at Minneapolis, in the county of Hennepin
5 and State of Minnesota, have invented certain
new and useful Improvements in Apparatus
for the Production of Ice, of which the fol
lowing is a speci?cation.
i
'
ows:
_, First. To provide a practical and efficient
means for freezing on successive additional
layers at the formative end of the cake. This
object I accomplish by the provision, in con- 5 5
nection with freezing-plates, of meansfor suc-
’
cessively lowering and raising the temperature .
My invention relates to the production of of said plates below and above the freezing
point and means for intermittently moving
by “arti?cial means,” so called, by repeatedly the progressively-formed cakes of ice away 60
freezing successive thin additional layers to from the freezing-plates by short steps of
the so-called “ formative end ” of the cake be movement immediately after the last frozen
IO ice in merchantable cakes or commercial form
ing formed.
15
.
Generally stated, this invention has for its
object to provide an improved apparatus for
layer of the cake is thawed loose from the said '
freezing-plates.
Second. To form a series of ice-molds with 65
carrying out a novel process or method, which the freezing-plates so disposed as to obtain
' ‘20
will incidentally appear in the following de the maximum efficiency with the resulting
scription, but which is the subject-matter of minimum of waste by radiation of heat, to so
a separate application, ?led as a division of construct and arrange such freezing-plates
this original application and bearing Serial that the impurities of the water will not be 70
No. 738,293, ?led November 27, 1899, entitled caged or caught in the freezing process, with
the result that the ice is left pure, and to ef
“Method of producing ice.”
It is a known fact that the resistance of ice
25 to the passage of heat increases about in pro
portion to the square of its thickness or the
distance through which the'heat is to be con
ducted. It therefore follows that ice ?ve and
fect an economy in space occupied by the
series of molds. , These objects I accomplish
by the provision of wedge - shaped molds '75
formed between divergently and vertically
disposed freezing-plates that are common to
one-half inches thick, for example, would adjacent molds. These wedge-shaped molds
30 offer about four hundred and eighty-four are placed in a water tank or receptacle below
times as much resistance to the passage of the Water-level thereof, and to secure the best
heat as ice one-fourth of an inch in thickness ‘results the bottom of the freezing-plates
and one hunched and twenty-one times as should be terminated some distance above the
much as ice one-half an inch in thickness. bottom of said tank and the upper end below
35 Again, a layer of ice one-fourth of an inch in the water-level, so as to permit the free cir
thickness may be easily frozen in two minutes, culation of the water and the escape of the
while it requires to freeze to the center of a impurities.
Third. To provide a form of freezing-plate
can of ice eleven inches thick or to freeze
progressively five and one-half inches, for in which the freezing will be slightly more
40 example, sixty hours in ordinary practice. rapid at the central or intermediate portion
' Hence it is of course desirable for the sake of thereof, so that the impurities-in the water
economy in time, cost, and space to limit to a will be forced outward and ejected from the
minimum the distance through which heat region wherein the freezing of the water is
must be conducted in the progressive forma taking place. This I accomplish by forming
45 tion of the ice cakes. My improved appa the hollow freezing plate or member with in
ratus, hereinafter described, has been designed gress and egress passages and with expansion
to especially accomplish this result.
30
35
90
95
chambers or compartments that progressively ~
In accordance with the desired ends above increase in capacity from the point of ingress ~
indicated several of the more speci?c objects to the point of egress.
2
‘763,089
Fourth. To provide an apparatus for the ness of the cake of ice it is desired to make, as
manufacture of ice in which the operation is eleven inches thick, the plates 2)’ and p2 are bent
very rapid, with the result that a large quan outward at an angle one-half as great as the an
tity of ice per day may be turned out or pro
duced from a comparatively small and inex
gle between adjoining plates that this portion
1f’ and p6 of the plate may lie approximately
pensive plant, thereby making possible the parallel with the sides of the cake of ice 1.
production of ice at a comparativelylow cost. The width of this slanting portion 195 and )2“
10
Other minor objects and features of my in
vention will appear in the detailed description
of the apparatus.
The invention consists of the novel devices
and combinations of devices heretofore noted
and to be hereinafter noted, and to be particu
larly set forth in the claims.
The invention is illustrated in the accompa
70
of the plate P is made about equal to the nec
essary movement of the cake outward to pro
duce the desired separation of the cake I from 75
the freezing-plates P. The shaping of the
plates thus is to insure the side surfaces of the
cake being made smooth. The end' pieces [)7
and p“ of the plate Pare so shaped as to con
form to the shape of the opening between the
nying drawings, wherein, like characters in— side plates p’ and 122, Fig. 7, and the riveting
dicating like parts throughout the several together of these four parts to constitute the
views‘
’
Figure 1 is a plan view of the circular freez
20
exterior of the plate is to be so done as to
make the plate perfectly gas-tight.
ing-tank, showing the series of twelve freez
Secured in any desired manner, as by screws 85
ing-plates, also the twelve cakes of ice being or rivets, to the interior of one or both of the
formed, and one of the controlling-frames with plates 1)’ and p2 are partitions p" and p10, bent
its guides. Fig. 2 is a side elevationof one U-shaped, and also partition 19“. These par
of the controlling-frames with a portion of a titions are of the same width as the end pieces
25 cake of ice inclosed therein. Fig. 3 is an end 127 and p8 and are intended to make approxi 90
elevation, partly in section, of the so-called mately tight joints with the side plates in or
“ controlling — frame” or “ ice - controlling”
der to effectually direct the movement or ?ow
frame shown in Fig. 2, showing the means for
securing the cake _of ice in the frame. Fig. 4
is a plan view of the controlling-frame, show
ing also a portion of one of the guides which
support it in position in the tank. Fig. 5 is
a view similar to Fig. 3 of a portion of the
397 of the plate P are the inlet-pipe p12 and the
larger outlet~pipe pm, which are provided with
controlling-frame, showing the securing de
through the top end piece 127.
35 vice in a released position.
of the refrigeri?c element. ‘
Projecting ‘down through the top end piece
suitable stop-valves p“ and p15, and these pipes
are made perfectly tight where they pass
Fig. 6 is a verti
One object of the partitions p“ and 12"’ is to
cal elevation of one of the hollow freezing partially con?ne the ammonia or other refrig
plates with the front side of the same re eri?c agent used as it ?rst expands at the en
moved to show the arrangement of the pipes tering-nozzle 321“ by means of the partition 1)”.
and partitions of the interior. Fig. 7 is a sec Then let it ?ow into the larger space at both
4.0 tional view of a freezing-plate on line 3/ 12/ of
I00
sides of partition 12” and nearly inclosed by
Fig. 6. Fig. 8 is an elevation similar to Fig. the partition 1910, then into the still larger
6 of a freezing-plate, showing the partitions space outside of that inclosed by partition 121°,
and inlet-pipe in a modi?ed form. Fig. 9 is thus not allowing the expansion to take place
a sectional view of a freezing-plate on line :0 :20 wholly at one spot and providing also for a
45 of Fig. 8. Fig. 10 is a section view of a freez nearly uniform circulation within all parts of
ing-plate, showing a modi?ed form of con the plate P. With the above arrangement of
structing the outer shell of the plate. Fig. 11 the partitions within the plate there will still
is a View of the inlet or outlet pipes (which be somewhat greater expansion of the refrig
may be similar) for the freezing-plates, show eri?c element in the vicinity of the center of
ing the valves for the alternate admission or the plate than toward the edges thereof, and
exit of the freezing or thawing agents.
this is desired to a certain degree in order
I10
The freezing-plate P, Figs. 1, 6,yand 7, is a that the freezing of the “additional layers”
hollow rectangular plate of a length fully as may be ?rst completed at the center and then
great as the length of the cake of ice it is de progress rapidly outward, that the impurities
55 sired to make, and its outer shell or exterior will be discharged rather than imprisoned and I20
is constructed, preferably, of two thin sheets frozen in. The outlet-pipe 321'" receives and
of metal 12’ and p2, bent, as shown, so as to be conducts away from the plate P the fully-ex
riveted together at the two vertical edges of panded ammonia~gas or other refrigeri?c ele
the plate 1)“ and 1)‘, and also of two end pieces ment and has holes or perforations p" for the
p7 and j)“ at the top and bottom of the plate reception of the gas, as well as the opening at :25
and through which the side plates 12’ and p2 the lower end of the pipe.
are also riveted together.
At such a distance
In Fig. 8 is shown a modi?ed form of con
radially outward upon the plate P (see Fig. 1) struction of the partitions ‘within the plate P,
as will make the divergence between the sur in which the refrigeri?c element is admitted
65 faces of two adjacent plates equal to the thick to the plate through a double nozzle 1218 into
130
763,089."
3.
the gradually-expanding compartments in iron. These angle-iron frames are secured
closed by the E-shaped partitions p1” and p20. together at the corners by small plates f‘“.
The partitions p21 are designed to divert a The controlling-frame F is provided with a
portion of the refrigerant to the extreme cen seeuring- frame composed of the bent bars
5 tral right-hand portion of the plate.
f6 and f7, connected together by the bars f3'
and f9, and‘ in these are securely ?xed the
struction of the plate P from that shown in spikes f”. A support f“ is secured to the
Fig. 7, in which the side plates 1)’ and p2 ter top of the controlling-frame, and in this is ful
minate at the edge of the slanting portion 1)“ crumed a lever f 12, which is connected by link
IO and p“, and instead of their being bent so as f13 to a casting f“, secured ?rmly to cross-bar 75
In Fig. 10 is shown a modi?ed form of con
to be secured together, as at 793, they are con
nectcd by a separate piece ?anged at both
edges 1)“, through which they are riveted or
otherwise secured to the side pieces at p23 and
15 192*. The advantage of this form over that
shown in Fig. 7 lies chie?y in the ease and
convenience of construction.
Fig. 1 shows twelve of these freezing
plates P placed on suitable supports and ar
20 ranged equidistantly spaced in a circle about
a common center and concentric with the cir
cular tank T, in which they are placed. This
tank T is of sufficient depth to have the plates
P set up from the bottom upon the timbers g‘,
25 Figs. 2 and 3, which also support the guides
G, as will hereinafter be explained, and in
f8 of the securing-frame. The leverf12 is pro
vided with a. pawl f“, connected in the usual
manner with handle-piece f1“, and to the top
of the frame F is securely fastened a sector
f 17, provided with notches for engagement
with the pawl f“. The lever f 12 extends
above the ?oor (not shown) of the tank T, and
by means of it the operator may easily secure
the cake of ice within the frame F by placing
the lever in the position shown in Fig. 3 or 85
release the cake of ice by placing the lever in
the position shown in Fig. 5, which shows the
securing-spikes withdrawn from the cake of
ice. In operation the frame F is released
from the cake of ice immediately after the
two additional layers have been frozen fast to
addition is deep enough to allow of the com-, the cake, is then moved a short distance toplete submerging of the plates P without ward the center of the tank, and is then
over?owing the tank. With the freezing‘ again secured to the cake of ice. The cake of
30 plates thus raised from the bottom of the tank ice is then thawed loose from the freezing 95
T the cakes of’ ice I will be formed entirely plates I by ?rst cutting off the refrigeri?c
above the sediment in the water which accu
?uid and then letting a relatively warm gas or
mulates in the bottom portion of the tank. ?uid for a. short interval of time circulate
The tank T is provided with a supply-pipe 25’, through the said so-called “ freezing-plates.”
35 through which water,preferably cooled nearly The cake of ice is then, by means of the frame
100
to the freezing-point, is admitted and kept at
the proper level in the tank. The tank is
s also provided with an overflow-pipe t2, which
leaves the tank at the distance from the top
40 where it is desired to maintain the surface of
the water. The tank is also supplied with
one or more discharge-pipes 29, leaving the
tank at the bottom, by means of which the
scttlings may be drained off from the bottom
45 of the tank or by which the tank may be en
F, moved the proper short distance away from
5° the. cakes of ice are formed are twelve con
freezing-plates. The guide 92 for the left 115
the freezing- plates. Thctmovement of the
cake of ice separates it from the freezing-plates
sufficiently for the formation of the succes
sive additional layers of ice. The frame F is 105
provided with projections f’ 18, extending out
ward from the sides at the bottom in position
and adapted to project into grooves g’ in the
sides of the guides G, Figs. 1, 2, and 3. The
guides G are made double-that is, a right
tirely emptied for the purpose’ of washing it and a left guide together in the form of a V~
out or to obtain access to any of the ordina and are ?rmly secured to the top of tim
rily submerged parts. Located opposite each bers g‘, which are placed in the bottom of the
opening between the freezing-plates where tank for the support of the guides G and the
trolling-frames, (only one of which is shown side of the frame F has formed integral there
in Fig. 1,) by means of which the cakes of with a raised portion provided with the ver
ice are held in, proper position with reference tical teeth or rack (3, and the frame F is pro
to the freezing-plates and are moved radially vided with bearings f1” and f2“, in which is
55 to separate the cakes from the plates after mounted an upright shaft 3”‘, having secured
each successive freezing operation. This con to it a hand-wheel f22 and pinion f23 in posi
trolling-frame has an opening through it in a tion and adapted to engage with the rack g",
radial direction of sufficient height and width . and by means of these the frame F is moved
I10
I20
to freely admit through it a cake of ice as by the operator after each freezing operation,
60 large as may be frozen by the freezing as beforemention ed. The securing-spikesf 1" 125
plates. This controlling-frame F is composed pass through the holes in the frame F, and
of top plate f’, bottom plate f2, and side therein act as vguides for the movement of
plates f’f", which are properly secured to the securing-frame when moved by the lever
the inner side of two end frames, composed, f”. For the sake of greater clearness the
65 preferably, of side and end strips of angle guides Ur and timber g‘1 in Fig. 3 are both.
4.»
‘763,089
shown in section, as at line
10
Figs. 2 and 4».
ively - formed cake may be said to be the
The tank T is made of sufficient diameter to
allow of the extension of the cakes of iceI to
such a distance radially from the frame F as
will admit of a block of ice of a desired width,
“formative” end of the cake. 1n virtue of
the fact that the freezing-plates which form
the wedge-shaped molds are vertically dis
posed and are set slightly above the bottom
(as twenty-two inches,) 12, being sawed off or of the tank and below the level of the water,
otherwise severed from the continuous cake thus leaving the mold open at its top and bot
being formed by any suitable means, (not tom, permits the natural circulation of the
'shown,) approximately where shown by the water due to convection, and hence in “freez
dotted line 13. As one after another f the ing'on the additional layers” the impurities 75
cakes of ice attain the proper length they are of the water are free to settleor to ?oat from
severed by the operator and the separated the freezing zone up to the‘very last stage of
cakes removed by any suitable means from the these comparatively short operations. Those
impurities which settle may be drawn off
Fig. 11 represents an arrangement of the from the bottom of the tank from time to
admission-pipe pm, which is provided above time and an additional supply of fresh water
the stop-valve p“ with a T and opposite substituted for the water Wasted by this oper
tank.
20
'
_
branch pipes 1225 and pm‘, each having an ad ation. Likewise those impurities which ?oat
mission or regulating valve 19277228. One pipe, may be skimmed from the surface of the
as p25, connects with the supply of liquid am water within the tank, and it will be under 85
monia or other refrigeri?c element, and the stood that the water in the tank will be kept
other pipe, 12%, connects with a thawing agent, at such a level that it will fully cover or sub
as heated expanded ammonia- gas or other merge the freezing-plates.
?uid or gas having a temperature above the
25 freezing-point. The arrangement of the exit
It will of course be understood that the ap
paratus above described is capable of a large
pipes may be exactly the same as to branches range of modi?cation in construction within
and valves as those for admission. During the scope of my invention. I do not, of course,
. the continuance of the freezing operation the limit myself to any de?nite number of freez
valve 111" is open, the valve 1927 partially open ing-plates in the series or circle or to the cir
or regulated to admit the proper amount of
refrigeri?c element, and the valve p28 closed
cular or radial arrangement thereof, as the 95
number might be greater or less than shown ‘
to shut out the thawing agent, while the valves in the drawings, and the said freezing-plates
of the exit-pipe are in a similar position. At
might be differently disposed, although there
the time of completion of the freezing opera are advantages in the circular or radial dispo
35 tion the valve 1227 is closed and the valve 122“ sition of the said plates. Also, so far as the
opened and regulated to allow the admission broad idea of my invention is concerned, the
of a proper amount of the thawing agent, and so-called s‘adjusting-frames ” for moving the
the valves of the exit-pipes are similarly re cake of ice progressively might be very con
versed to deliver the warmer or thawing
siderably modi?ed.
I00
,
agent instead of the expanded refrigeri?c ele
The timbers g‘, which support the freezing 105
ment to its appropriate receptacle.
plates and the guides in the tank, are cut down
If deemed desirable, the twelve inlet-pipes for the guides, the portion which supports the
for the whole series of freezing-plates may freezing-plates being of substantially the same
be joined together and combined to form the height as the top of guide G, as shown at the
45 pipe 171?, that they may be manipulated simul left side in Fig. 3. This brings the bottom I10
taneously and as one. The exit-pipes may
also be joined and operated as a unit. As a
matter of convenience it may be deemed de
sirable to connect the inlet and outlet pipes,
respectively, into two or three groups for the
series, that the attention of the operator may
be given to the manipulation of the control
ling-frames more promptly after the thawing
loose of the freezing-plates.
55
The series of ice-controlling frames F may
be said to alternate with the series of freez
ing-plates, as they occupy intervening radial
positions with reference to the freezing
end of the freezing-plates on a level with the
lower edge of the cake of ice formed thereby.
It will be further understood that many
modifications of the construction above de
scribed may be made within the scope of my 115
invention.
.
‘What I claim, and desire to secure by Let
ters Patent of the United States, is 'as follows:
1. In an apparatus for the production of ice
in cakes, the combination with a tank adapted
to contain the water to be frozen, of a series
of separated, vertical, radiating, substantially
?at freezing-plates, ?xedly sustained below
plates. The freezing-plates being arranged the water-level of the said tank, and forming
equidistantly disposed in a circle from the the water into V-shaped portions between the I25
center of which they radiate, they are there adjacent plates of the series; a like series of
fore uniformly divergent one from another. ingress and egress pipes connecting the said
The cake of ice as it is formed from between plates respectively with the refrigeri?c ele
the diverging f reezin g-plates is wedge-shaped, ment; and an auxiliary series of pipes in po
65 and this wedge-shaped end of the progress sition and adapted to‘ enable substitute connec
130
763,089 ,
5
-'
tion to be made at will, of the said plates with ing free communication between the said V
shaped portions of water and the water in
a thawing element.
2. In an apparatus for the production of ice the exterior and top and bottom portions of
in cakes, the combination with a tank con the tank, and limited communication with
taining the water to be frozen, of a series of the water in the center of the same; ingress
IO
15
separated, radially-disposed, hollow freezing
plates, each having substantially parallel prin
passages from a source of supply of a re
said plates.
said plates to said blocks of ice shall be first So
in cakes, the combination with a tank con
taining the water to be frozen, of a series of
impurities toward and past the edges of the
frigeri?c element to the central portion of
cipal surfaces, and ?xedly secured in vertical each of said freezing-plates; return-passages
position submerged in the said water; ingress from the outer portion of each of said plates;
and egress passages connecting each of said and the same being all arranged in suitable 75
plates primarily with a refrigeri?c' element, operative positions with reference to V-shapcd
and secondarily with a thawing element; and blocks of ice supported with their diverging
means substantially as described for sustaining faces in juxtaposition to the principal sur
and advancing V-shaped cakes of ice from the faces of said plates, that the freezing from
3. In an apparatus for the production of ice completed in the central portion, expelling
cakes of ice being formed.
‘
7. In an apparatus for the production of ice
freezing-plates, fixedly submerged in the said in cakes, the combination with a tank contain 85
Water; ingress and egress refrigeri?c commu ,ing the water to be frozen, of a radiatingse
nication with each of said plates; substitute ries of separated, vertical, substantially ?at
radially-disposed, separated, vertical, hollow, ,
20
ED
thawing-element communication with each of
said plates; a series of radial guides alternat
ing with said freezing-plates; and a like series
of sustaining and controlling frames mounted
in the said guides, and adapted to alternately
hold and advance the cakes of ice progressively
formed by the said freezing-plates.
freezing-plates submerged in the said water;
ingress and egress refrigeri?c communication
with each of said plates; substitute circula
9O
tory thawing-element communication with
each of said plates, the same being .in suitable
operative relation and position to a like se
ries of blocks of ice having V-shaped' inner
4. In an apparatus for the production of ice ends, supported with their diverging faces in 95
.30
in cakes, the combination with a tank adapted juxtaposition to the principal surfaces of said
to contain the water to be frozen, ofa circular plates; and minorv inclined surfaces of the said
series of separated, vertical, hollow freezing plates, each substantially parallel with the
plates ?xedly sustained beneath the working mating surface of the adjacent plate, and con
35 water-level of said tank; ingress - passages tiguous to the parallel sides of the inclosed
40
I00
from the source of supply of a refrigeri?c block of ice.
8. In an apparatus for the production-of ice
element to the central portion of each of said
freezing — plates; return - passages from the in cakes, the combination with a tank contain
outer portion of each of said plates; substi ing the water to be frozen, of a series of sta
tute circulatory passages from each of said tionary separated, vertical, diverging freez 105
ing plates or members of rectangular hollow
dium; and means substantially as‘ described, form, radially disposed to form a series of
for sustaining and intermittently advancing wedge-shaped molds or openings, the said
the cakes of ice progressively formed in the plates being common to the center of the tank
plates to a source of supply of a thawing me
4-5
divergent openings between the adjacent and forming vertical walls of adjacent molds,
in which cakes of ice are progressively formed.
9. In an apparatus for the productionof ice
5. In an apparatus for the production of ice
in cakes, the combination with a tank contain in cakes, the combination with a tank contain
ing the water to be frozen, of. a series of ra ing the water to be frozen, of a horizontally
50 dially - disposed, separated, vertical, hollow disposed series of independent, stationary, sub ng
freezing~plates, fixedlysubmerged in the said merged freezing-plates radiating from a com
water; ingress and egress refrigeri?c commu mon center of said’ tank, to form intervening
nication with each of said plates; and substi molds for the water to be frozen while the
tute ingress and egress thawing-element com same is in free communication with the water
I20
1
55 munication with each of said plates, the said in the tank.
1.0. In an apparatus for the production of ice
communications being in position and adapted
plates of the series.
for greater refrigeri?c activity in the cen
in cakes, the combination with a tank or recep
tacle for the water, of a series of freezing-plates
6. In an apparatus for the production of ice radiating from acommon center within said
tank and forming a series of wedge-shaped
60 in cakes, the combination witha tank contain
ing the water to be frozen, of a radiating se molds, having vertical walls, and an alternat
tral portion of the plates.
\
ries of separated, vertical, substantially ?at ing series of radially-movable ice-supporting
freezing-plates submerged in the said water, frames, substantially as described.
11. Ahollow freezing plate or member hav
forming it into V-shaped portions between
the adjacent plates of the series and allow-' ing ingress and egress passages and expansion- ’ 130
S
763,089
compartments progressively increasing in ca end of said partition; and an outlet-pipe coin?
pacity from the point of ingress to the point municating with the space outside of said in
of egress.
12. A hollow freezing plate or member hav
ing an ingress-passage opening into the inter
mediate portion of the same, and an egress
IO
closing partition, to provide duplex expand
ing circulatory passages for the refrigerilic
element. _
15. In a hollow freezing-plate, the combina
passage opening from the marginal or outer tion with an inlet-pipe opening at or near the
portion of the same, and having interior ex central portion of the plate, of duplex expand
pansion—compartments intermediate of said ing compartments extending from the central
passages increasing in holding capacity from portion to the exterior portion of said plate,
the former to the latter, substantially as de and an outlet-pipe in connection with saidex
scribed.
terior portion, substantially as described.
13. In an apparatus for the production of ice
16. In an apparatus for the production of ice
in cakes, the combination with freezing plates in cakes, the combination with a guide pro
or members constructed with a central admis
vided with a parallel rack, of an ice-control
sion and successively larger compartments to ling frame mounted thereon; a wheel and pin
their outlet, providing greater refrigeri?c ac
tivity at their center and intermediate por
20
ion engaging With said rack; ice-supporting
sides at right angles with each other in said'
tions, of circulating connections thereto for frame; a series of spikes adapted to sustain a 45
alternately admitting to said plates a refrig cake of ice against said supporting sides; and
erilic and a thawing medium.
a lever for projecting and withdrawing said
14. In a hollow freezing-plate, the combina
tion with the side and end plates thereof, of a
U-shaped central partition; an inlet-pipe pro
jecting into the space within said partition;
an inclosing U-shaped partition about the open
spikes at will.
,
WALTER ELIPHALET CRANE.
Witnesses:
JOHN V. .KRANZ,
O. F. GUs'rArsoN.