1. business and industrial
2. energy
3. coal

Nov. 14, 1933.
1,935,106
E. H. ALLFREE
CONVEYER
4 Sheets-Sheet l
Filed Feb. 25. 1932
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0V. 14, 1933.
E H_ ALLI-'REE
1,935,106
CONVEYER
Filed Feb. 25, 1952
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INVENTOR
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A"`ToRNEY
Nov. 14, 1933.
E. H. ALLFREE
1,935,106
CONVEYER
Filed Feb. 25, 1952
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TTORNEY
Nov. 14, 1933.
E_ H_ ALLFREE
1,935,106
CONVEYER
Filed Feb. 25, 1932
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ATTORNEY
1,935,106
Patented Nov. 14,Y l1931?»
fP-ATsNroFFiCE~
Y _UNITED ’ STATES
@1,935,106
»
CONVEYER
`
Edwin H. Allfree, Ironton, ohie '
_
Application February 25, 1932. Serial‘No. 595,201
8 Claims.
(C1. 19e-220) „
This invention relates to the loading and trans hereinafter more fully described and
portation of materials and comprises a structure pointed out in the appended claims.v
which,k combines, within itself, functions and
In the draWings:_
,
particularly
v
i
"
Figure 1 is a top plan View, somewhat diagram
' 5 types of machines, namely, power shovels and matic in nature;v of 'a shaker shovelconstructed 60‘
operations hitherto accomplished by two diiîerent
oscillating
conveyers.
Y
v
i
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in accordance with-,and embodying'` the ‘princi
_
This invention, which hereinafter, for conven
plesl of this invention;
'
‘
v
Y
`
'
Figure 2 is a similar view, on a somewhat larger
ience, I shall term a “shaker shovel”, is primarily
adapted for use in mines, and consists of a scale than Figure 1, of the central 'portion of _the
10 structure so designed, constructed and operated device and illustratingin greater detail the power 65
that it performs the digging and loading work plant thereof;
‘
.
` Figure 3“is a side view of the parts' shown in
heretofore accomplished by power- shovels to
gether with the transportation of the material
Figure
formerly performed by oscillating conveyers.`
15
2;
s
.
,
_
, Figure4 is asimilarside view of.` the shovel or.
The objects of the invention are as follows:
digging end of the device; '
,i
`
"
`,
-`
»f First-To construct a device of the character
` Figure 5i's a greatly enlarged vertical sectional
specified in such a manner that it comprises a
view'on 'the line V-`-_V of Figure 2_ andillustrat--
mobile unit capable of transport from place to ing the means' `employed for. imparting recipro
place, under its own power, without disassembling cating movement to the membersv of the oscil
20 of parts.
,
'
Figure
conveyer;
6 is a horizontal,
,
sectional
_,
y. view on‘the o
Second-_To construct the device in such a lating
manner that while one half of the oscillating line'VI-v-VI "of Figure 5; l
' '
»o
Figure 7 is a diagrammatic view villustrating
members of the conveyer are engaged in forward
movement theV other half are engaged in'rear the sequence of variation in oscillating yvelocity
25 Vward'movement and vice versa, whereby the forces of the conveyer members and the oppositionof 80'
of inertia are divided and opposed, in approxi the forces or’ïinertiaft’o obtain approximate bal
mately equal amounts, with a consequent lelimi
ance;
,
.
,
,
,
„
.,
Figureß is a vertical sectional view on the line
_ nation of vibration to such a substantial degree
as to render unnecessary the rigid mounting VIII-VIII of Figure 2 and illustrating the'means
30 and bracing heretofore essential in conveyers
of ysimilar type.
‘
.
’
Y
employed for moving, the 'device from place tor85
place;
A’
~
L
'v
.
,.
Figure 91s a top plan view of one end of a con- '
Third-The provision of means integral with
the device, for effecting the desired opposed veyer member illustrating the kSupporting ymeans
movement of the members of the oscillating con-l therefor andthe connecting means adaptedto
secure it to the 'end of an adjacent member in 90
veyer.
Fourth-The provision of means integral with
the conveyer train;y
from'place to place.
'
’
„
'
,
.
.
Y
Figure 10 is‘a'side view, partly broken away,
, the device and operative at will, for moving it
of the parts 'shown in Figure 9;
Fifth-_The provision of improved connecting
40V means between adjacent sections in the conveyer
_ `
'
,
'
`
Figure 11 is avertical sectional view on the'
line XI-XI of Figure 10;
,
Y
a
95
"
Figure 12 is a view similar toa Yportion of Fig
Sirth.--The provision of improved supporting ure 10, but illustrating also the cooperating 'end'
train;
f
-
of the adjacent member of the conveyertraink
Seventh-Other objects and advantages of the with the connecting means of the two members
means for the sections in the conveyer train.
r invention Will fully appear and will be readily
in
engagedv position;
'
,
`
_
'
,
100
i
, Figure 13 is a sectional plan viewjon theline
understood from the following detailed descrip
tion of the construction and cooperation of the
XIII-XIII of Figurel 12;
`
~
l
'
`
`
`
"
Figure 14 is a top'plan viewvsimilar to _a por
These objects are attained in the `manner tion ‘of Figure 1; and illustrating certain means
hereinafter setl forth, reference being had to the by` which the shovel at the digging end of the 105
.
,Y
accompanying four sheets >of drawings, wherein device may be swung yfromfsideto side; , ’
Figure 15 is a greatly enlarged vertical sec
similar reference characters indicate the same
tional view on the line'XV-XV of Figure 14; and,
parts in the several figures. '
Figure 16‘is_ a side View 'of the parts shownin
The invention consists of structural character
ci C: istics and relative arrangement of elements t0 be
parts.
,
’
'
,
Figure
15.
‘
"
"
"
’
"
2
1,935,106
Briefly stated, this invention contemplates the gether to form an articulated whole. Similarly,
use of a series of conveyer members connected
together to two trains of substantially equal`
length and weight and adapted to overlap at their
Cu meeting point. Means are provided, preferably
at this meeting point, for causing simultaneous
oscillatory movement of the trains but in op
posite directions.
At the outer end of the ma
terlal receiving train is connected a shovel mem
ber adapted to oscillate with that train.
The
the material delivery conveyer train C consists
of a plurality of similar connecting> members 46
and mounted members 47, which are likewise piv
otally connected together to form an articulated
whole.
Each mounted member 47 is reciprocably
mounted upon a wheeled truck 43 mounted upon
the tracks 28 and adjoining trucks of each train
are pivotally connected to each other and the
85
invention further contemplates the mounting of trains of trucks are pivotally connected to the
the conveyer members upon a train of connected
wheeled trucks in such manner that they are re
platform 21 of the power unit A by means of
draw bars 49. Thus, it will be seen that the
ciprocable in respect thereto so that during the trucks form -articulated trains corresponding, in
oscillations of the trains of conveyer members articulation, to the conveyer trains, and the man
90
the train of trucks is motionless. Finally, the ner in which the entire device may be driven from'
train of trucks is mounted upon a track and place to place, under its own power, wherever
power means, preferably associated with the con the tracks extend, is self-evident and calls for
veyer oscillating means, is provided to actuate no further description.
20 driving mechanism whereby the train of trucks
The mounted member 47 at the outer end of 95
and conveyers carried thereby may be moved, as the conveyer train B, remote from the power unit
a unitary structure, from place to place upon the A, is ñxedly mounted upon its truck 48 rather
than reciprocabie thereupon and at its outer end
Referring, in the first instance, to Figures 1, 2, has hingedly Vand detachably secured to it a
3 and> 4 of the drawings, there is shown a shaker scoop or shovel 5l adapted, under the influence
25. shovel
comprising' a central powervunit A, a ma of the oscillation of the conveyer train, to ldig
terial conveyer train B, and a material delivery into, pick up and feed along any material upon
conveyer train C.
a pile or collection on which it may be brought
The power unitA embodies a platform 21 sup to bear. The manner in which this scoop or
ported as a truck upon two pairs of wheels 22 on shovel 51 is secured to the end member 47 is,
axles 23. A motor 24 is mounted upon the plat preferably, as illustrated in detail in Figures 15
form 21 and its shaft 25 is provided with a pair and 16, wherein it is shown that the member
of worm gears 26 meshing with worms 27 on the 47 is provided with a pair of laterally spaced
wheel axles 23, as shown in detail in Figure 8. knuckles 52, the shovel 51 is provided with Va
¿ The wheels 22 are of the conventional ñanged centrally disposed offset knuckle 53 and union
rails.
'
.
'
` type and engage rails 28 so that when the motor
1_00
105
11o
is eiïected by means of a laterally removable
2_4 is operated the platform 21 will be driven to coupling pin 54 which `engages with all three of
oïr fro upon the railway. Operation of the motor the knuckles.
Y
~
24 is effected through the medium of a controller
29' of any desired type.
»
’
'
When the device is in operation, it may fre
quently be desirable to swing the shovel 5l from 1_15
Also mounted upon the platform 21 of the side to side without disturbing the position of
the rest of the structure. This may readily be
power unit A is a motor 3'1 adapted to actuate
the members of theroscillating conveyer trains
B and C. The shaft 32 of this motor 31 operates
worm gearings, the positions of which are indi
" cated at 33l and 3'4 in `Figures 1 and'2, and which
are shown in detail in Figure 5. Each of these
gearings comprises a worm 35 on the shaft 32
which'meshes with a worm gear 36 secured to a
vertical shaft 37 rotatably mounted in a bearing
" structure carried by the platform 21. At the base
of each shaft 37 is a head 38 from which projects
downwardly a crank pin 39 engaging’` one end of
’
effected, especially when thedevice is located ,at
a dead end of track, as it most usually will be, in
themanner shown in Figure 14, In this view,- 12D
the track is shown as having its rails equipped.'
with block-and~tackle structures 55 and 56, the
outer -pulleys 57 >of which are fixedly mounted'
with respect tothe normal position of the rails.
Tension upon the cable of one block-andètackle 1.25
structure coupled with corresponding slackening
of the cable of the other structure will move »the
track to one side or the other with consequent
a link 41, which in turnr is engaged at its other swing from Vside to side of the path'of operationv
end by one arm of a lever- 42 pivot'ally mounted of the shovel 51. The tension and slackening of>
upon a vertical stud 43 mounted on a support- the cables may be effected by hander it may be
ing structure carried by the platform 21.
power controlled from the power unit A in a man
The other arm of` the lever 42, which is actu ner so obvious as to require no speciñc illustra7
ated by the gear mechanism indicated at 33 in
tion.
öff
K
y
Figures 1 and 2, is connected to a conveyer mem
‘ ber 44, which is the inner or last member in the
» In the operation of the device, the motor 31
causes oscillation of the levers 42 through the
material receiving conveyer train B. The cor
responding arm of the similar lever 42, which
is actuated bythe gear mechanism indicated at
es' 34 in Figures 1 and 2, is connected to a conveyer
medium of the interposed worm gearings, shafts,
445, which is the inner or first member in the
material' delivery conveyer train C. The ad
jacent ends of the members 44 and 45 Vare at all
times in overlapping relation to each other so
i that material discharged from the conveyer train
‘B’ will be received by `theconveyer train C in
a manner to lbe later described.
opposed. rl‘hat is 'to say, theconveyer train B is
caused to oscillate forwardly towards the power
The material receiving conveyer‘train B con
sists of- a> plurality of connecting members 46 and
13.5
crank pins,. and links. The two crank pins 39
are so positioned, rotatively, in respect to one
another that the movements of the levers are
unit A during the time that the conveyer train C
is caused to oscillate rearwardly towards the
power unit and vice versa. Thus, the forwardly 145
exerted force of inertia of the train B will be met
and substantially neutralized by the simultaneous v
rearwardly exerted force'of inertia of the train
C, and the rearwardly exerted force of inertia
mounted members 47 pivotally connected to-._ of the train B will be met and substantially neu
.
1.9355106
tralizedby thesimultaneous forwardly exerted the trucksiîis ".prevented.' by means.' -of retain
force of inertia of the train C. Inasmuch as the ing plates 71, detachably secured to the '.upper
twoA trains are designedto’be of practicallyequal‘ facesëof the side frames 62i~of the trucks. s Any
length „and'gweight,~ >this .neutralization of inertia tendency. towardsv slipping of theïsu'pporting- roll
Ci strains and stresses, while'not by any means one
hundredV per cent, - is -of’such a ‘great’ degreev that
ers 67> between >the rails 66 and.69 is prevented by 80
means Ofcertain positive rack and spur connec-`
vibration-is reduced .to a'point where the deviceis tionztherebetween. ` Adjacent each rollers'67 and
practicallysself supporting >and ire'quires `A-no out preferably formed integrally'~therewith is aspur
side bracing or anchorage.- Asa further: result pinion „72; Adjacent each'rail 66 and preferably
ofthe elimination-of disturbing forces or `unde formedflintegrallyv therewith is a rack 73. . vAnd 85
sirable vibration, they devicel may ¿traverse Aand adjacent‘each rail 69 isîa similarly formed rack
74.5 While theïweight of the members 47 is always
operate. overçlightly constructed .trestles, ' 'a Afea
ture which -has‘hitherto been impossiblewithos-l supported bythe rollers 67, the spurs 72 are con
cillating :.¿conveyers . for; the ¿reason --that ' such stantlyin .mesh with ,thev racks 73and 74 and
'-1.5 trestles .could„not; withstand the great vibration . the proper relation vbetween the conveyer mem* 90
inherent to` suchiconveyers.
f,
. . ~
. The >reason ,that` vibration 'can notbe wholly
ber and supporting truck is insuredr.`
`
_ ln, orderrthatthe Vdeviceffmay be moved over
eliminatedand-the inertia forces caused to com-y the track from place to place, it is necessary that
pletely neutralize each otheris ¿that theforward both the conveyer member trains and the sup-`
and r,backward oscillations` ofthe conveyor trains porting truckY train be» similarly articulated, Vas 95
B and C, while opposed,andrythmic,` are vrnot har previously described. This is best accomplished
monious.. `In order _toeñect maximum' forward by providing the adjacentconveyer members and
feedv` of the material> undertransportation, each adjacent truck’andf‘draw bars .with vertically
forward swing of each conveyer train `is `charac-_ aligned couplings orv connecting' means. These
, j; terized by slowly accelerated and rapidly retarded . are-:preferably provided in the'manner shown‘in 10i)
motion, and each backward swing‘of each con- Figures 9; 10,; 12 and 13. Secured to one offtwo
veyer train is characterized by rapidly accelerated abutting members ofthe conveyer train, 'or truck
andfslowlyl retarded» motion'.l Thus„as the recip and draw bar. train 'isa projecting arm- 75 termi',
rocations vof the two _trains are opposed, slow, ac-V nating _in_vertically spaced jaws ’Y6-between which
celerationof one train' will always-.be opposed vby is lmounteda ballor rollerl 77. Secured to the 105
rapid accelerationof the other, and rapid retarda 2ldjacent member of the corresponding train». is ya
tion of one will always be. opposedby slowgrer-v swinging hook 78 adapted to-en‘circle and> embrace
tardation of the;.other,«and viceversa, and there thekball or roller 77,l asshown in Figure 13. This
will always- be a ¿preponderance ~ of .inertia 4force hook `78 terminates'in a¿.-forked.oute`r end 79.
Laterallyv spaced from. the pivoty of the swingingA 110
exertedin one direction orthe other'with a cer
tainI amount off» consequent vibration, `butthe hook-,78 is thev pivot'of‘a swinging bolt 81, upon
terrific Asurges and pulsations, heretofore an in
the outerend, of which is ythreaded a‘nutv 82. ,
escapable.- concomitant of` operationpf oscillating
In coupling, adjacent members of theA two trains
conveyers, have beenrovercome to a pointwhere arebrought into proper position.> First, thetwo
vertically aligned hooks.' 78 are swung to embrace l1`5
thetwovertically Aalignedballs or rollers 77, and
` retardation during the oscillations .of i the _con thenthe two vertically,‘aligned'bolts 81are swung
- veyer trains. arey illustrated, diagrammatically, ~ in toçfpass between. the jaws of `the forked outer
Figure7... ‘The twok crankj pins controlling;y theI ends 79 of- the hooks 78.."Finally, the nuts 82
,45 ‘j oscillations are. shown at œ .and y, diametrically aretightenedand members of the train are thusl 120 '
opposed >and asthough revolving about a rcommon properly connected. vIn uncoupling, the nuts I82
center e. ¿The two linke are shown at an and n.~ are-,loosened after which the hooks 78 lare free y
I The'velocity of oscillation of the conveyerëtrains toben-.swung to disengage the balls or rollers-*77. »
atA one stage oftheir-movement isjasthelength
,Anyß wear between the 'engaging' members` of
they fareÍnegligible.'
« «, ,j
^
y.The timing r.and sequencey of accelerationA and
125vl
j; ofthe line «Land at >the oppositestage lof ¿ their thecoupling devicemay be readily compensated
n
movement it is 'as the vlength of ¿the lineA b.
, byfadjustment of the nuts 82, and'slackness or»
~ The'crank pins rotate with uniform speed and,
. >From the „foregoing
is thus prevented.
disclosure of thefconstruc»`
v
due to, theangular‘dispostion of thevlin‘ks, the lostniotion
>tion
and
operation'of
v'the
ifinvention,
it -will `>be
desiredvariationsin velocity. »of >oscillation >of
i ¿the conveyerftrains is establishedand maintained.> readily seen thatall lthel objects'and advantages'lSO.
" .'Ir‘h'e „manner »in which the conveyerfmembers. recited in thestatement‘of invention have been
47 are.Y supported jupon the trucks48 soasto bev fully and eñicientlycarried out, in orderto Jef;
capable ~ of reciprocation in respectv .thereto is fecti'first, angimprovedçandi‘ eilicient control of
inertia >lin~ conveyers »of the vrecip'ro'cative type;
best shown in Figures 9, 10 and 1l.
second,gtoY provide a: conveyer 'capable' of loco-‘135;
v _ frames
Each l,truck
62> and48wheels
-econsistsof
63 rotatably
ap latform
mounted
61,V -onV motion, ormounted on wheels .for removal intact
axles 64.V The axles are fixedly‘secured to-the from; place to4 place vover railway‘tracks; Vthird,`
animprovedroller support forshaker conv‘eyerv
cured toÍthe platformfßl- are vvpairs of laterally >troughing> not only useful . for railway. mounting
body of vthetru'cl: lby means kofV Ufboltsßô. Se
55. .j spaced
'rails 6B upon., .which rest.~ rollers l674 se( but adaptable for use,elsewhereyfourthga power La@
cured, '_inpairs, to shafts 68. >Resting ,uponthe` shovel with `means ,for locomotionfgcapable of
upper faces <ofthe rollers 67 are pairs‘of laterally digging loose materialand movingait -over rela
spaced rails 69> securedto the under faceflofthe tively long'longitudinal distances not restrict-->`
Y conveyer member §47.¿ ¿When the Y conveyer memf ed to a straight path; and, fifth; `such 'ay reduc-`
'
ber. trains are voscilla/ted, the rails V69 _run _upon tion of vibration ;of «supporting structures for
the rollers 67..which, in `turn, run> uponthe rails shaker conveyers softhattheyY may; be rsafely
66; andV the ' supporting trucks thus. provide a. mounted upon trestles or other» desired carrying'
fixed vand motionless' support forì'the oscillating means, thereby extending their scoped-’useful
conveyer trains". ¿Accidental vertical‘- ormlateral:
ness and, eliminating the use of powerfulandexi îl
,'.g'dislodge'mentx of the. conveyer membersv „from pensive, retaining ¿jacks .wedgedlbetween the top‘l50.
1,935,106
4
direction to the reciprocation of the other sec.
tion, and all the elements of the conduit con
While the practical embodiment of this in veying the material in the same direction, and
vention, which «isl herein illustrated anddescribed, said reciprocations being characterized. by slow
is the preferred form, it must be'understood that ly accelerated rapidly retarded velocity alternat
and bottom of mine tunnels now usually em
ployed.
Y
-
it is in no senseV a limitation of the invention. ing with rapidly accelerated ’ slowly retarded
Many changes, alterations and modiñcations of velocity and in a deñnite and ñxed relation to
the various parts and their relation to one an each otherv and in relation to said trucks. '
other will readily suggest themselves to those , 5. The combination, in. a material conveying
10 skilled in the art, and it is contemplated that this device, of a reciprocatory conduit comprising two
invention includes all such changes, alterations sections ofv substantiallyv equal weight adapted
and modiiications as are in accordance with the to overlap at their adjacent ends and moving in
principles of the invention as herein set forth rectilinear paths, means for reciprocally sup
and such as'fall within the scope ofthe following porting said sections, a- motor, oscillating means
moving in a horizontal plane and so constructed, 90
arranged and directly and independently Vcon
What I claim is:
l. The combination, in a material conveying nected to each of the adjacent ends of said sec
device, of a mobile power unit, a pair of mobile tions and with said motor for~ reciprocating said
trains of supporting members coupled thereto and two sections of said conduit with slowly accel
claims.
.
`
extending, respectively, forwardly and rearward
erated rapidly retarded'ad-vance strokesI alter- 95
ly‘y therefrom, a pair of trains of conveyer mem
nately with rapidly accelerated slowly retarded
bers supported, respectively, upon said trains of return. strokesin a definite and ñXed relation to
supporting'members but reciprocable in respect each other and' to said supporting means, vsaid
thereto, means- carried by said mobile power unit advance strokes of one section of the conduit
foroscíllating said conveyer trains simultaneous occurring during the return strokes of the `other
ly` but in opposite directions, and means carried
by said mobile power unit for moving itself and
6. Thecombination, in a material conveying
said mobile trains of supporting members.
device, of a reciprocatory conduit comprising twov
2. The combination, in a material conveying sections of substantially requal weight and mov
device, of a plurality of c'onveyer members and ing in rectilinear paths, means Yfor reciprocally
means for connecting said members, end to end, supporting said sections, two separated pivotally
to form a train, said connecting means including mounted levers oscillating in a horizontal plane,
aV projecting portion on one conveyer member ter
one of said levers having one of its ends con
minating in a ball, a pivotally mounted hook on nected to one of the adjacent ends of said sec
an _adjacent conveyer member adapted to em tions, and the other lever having one of its ends
brace said ball, and pivotally mounted means for connected to the adjacent end of the other sec
retaining said hook in ballembracing position.
tion, a motor, means connected to said motor so
3. The combination, in a material conveying constructed, arranged and interconnected with
device, of a reciprocatory conduit comprising two the other ends' of said two- separated pivotally
40 `sections of a plurality of 'connected elements, a mounted levers for reciprocating said two sections
25
section..V
`
-
'
5
-
`
100
"
105
110
115
of said conduit with slowly accelerated rapidly
cally supporting said conduit on said track, means retarded advance strokes alternately with rap
for bodilymoving said trucks with the conduit idly accelerated slowly‘retarded return strokes’in
railway track, trucks on said track for recipro
on said track, means vcarried by one of said a definite and ñxed relation to each other and
trucks and attached to the adjacent ends of said in relation to said supporting means, said 'ad 120
twosections so constructed and arranged to re
vance strokes of one section of the conduit oc
c_iprocate said sections in r‘ectiline‘all paths and curring during the return strokes of the other'
in such'a manner that the reciprocations- 'of one
section are opposite in direction to the recipro
50 cationsV of the other section, and all the elements
of the conduit conveying the material in the same>
direction and said reciprocations being character
ized by slowly accelerated rapidly retarded ve
section.
"
'
'7. The combination, in a material conveying
device, of a reciprocatory conduit comprising 125
two sections of substantially equal weight adapt
ed tol overlap at their adjacent ends and mov
Ving in rectilinear paths, means for reciprocally'
locity alternating with` rapidly accelerated slowly supporting said sections, two separated pivotally
retarded` velocity and ina deñnite and fixed re mounted levers oscillating in a horizontal plane', 130
lation to‘each other and in relation to said sup
portingtrucks.
'
i
>
4. The‘combination, in. a material conveying
device, of a reciprocatory conduit comprising two
sections of a plurality of separate connecting and
supporting, members, means for flexibly secur
ing said connecting lmembers to said supportingA
members to form an 'articulated whole, railway
trucks, said supporting members reciprocably car
65 ried -upon said. trucks, means for flexibly secur
ing said trucks -coincident with the 4means for
one of said levers having one of its ends con
nected to 'one of the adjacent endsv of said sec
tions, and the other lever having one of its ends'
connected to the' adjacent end of the other sec
tion, and the other end of each of the pivotally 135v
mounted levers being provided with a link, a mo
tor in proximity to the adjacent ends of said sec
tions, means connected to said motor and each
of said links pivoted to said levers for reciprocat
ing said two sections of said conduit withv slowly 140
accelerated rapidly retarded advance strokesal
flexibly connecting said supporting 'members of ternately with rapidly accelerated slowly retard
the conduit so that the trucks form an articu
ed return strokes in a deñnite and ñXed relation
lated train corresponding in articulation to the to each other and in relation to said supporting
70 conveyer train consisting of said iiexibly> secured means, said advance strokes of` one section of the 145
two sections of connecting and supporting mem conduit occurring during the return strokes of
bers, means carried by one Vof said trucks and the other section,
' '
connected to the adjacent ends of said two sec
8. Thel combination, in a material conveying
tions and so Vconstructed and arranged tol r'e-vr device, of a reciprocatory conduit comprising’ two
_ciprocate one section on said trucks in opposite sections of substantially equal weight adapted 150
75A.
1,935,106
to overlap at their adjacent ends, means for re
eiprocally supporting said sections, a motor, oscil
Vance strokes alternately With rapidly accelerated
slowly retarded return strokes in a deñnite and
lating means moving in a horizontal plane and ñxed relation to each other and to said sup
so constructed, arranged and directly and inde porting means, said advance strokes of one sec
pendently connected to each of the adjacent tion of the conduit occurring during the return 80
ends of said sections and with said motor‘for strokes of the other section.
reciprocating said‘two sections of said conduit
with slowly vaccelerated rapidly retarded ad
EDWIN H. ALLFREE.
10
85
15
90
20
25
100
30V
105
35
110
40
115
120
y50
125
5.5
130
60
135
65
.140
70
145
75
150