vJan. 8, 1935.
C. T. GILBERT
1,987,232
WASHBOARD
Filed May 9, 1934
CHARLES 177 GILBERT
1,987,232
Patented Jan. 8, 1,935
Y.
1*PATENT OFFICE; 1,987,232’ ‘
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IJWA‘VSHBO'ARD
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,Charles‘T. Gilbert, Saginaw, ‘Mich, assignor to I
National
corporation
Washboard
‘of West Virginia
Company, Chicago, Ill.,'a
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Application May 9.1934,,Sériai No... 724,700
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2 Claims."
(01.;‘68-29)
~ This invention relates to improvements inthe
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Fig. 4 is a horizontal sectional View on line 4.—-4
parts‘ of washboardsemployed as rubbing faces of Fig. 3.
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and more particularly to double. faced, wash _‘ Fig. ,5 is ,a fragmentary, viewgin perspective
boards.
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The object of myinvention is'the provision of
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showing the preferred arrangement of ‘thereon
.tiguous rubbinggfaces. "
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a novel and improved-double ‘rubbing facethat . vFig. 6 is a detail view in perspective, showing
shall be inexpensive and‘ simple; in construction an approved. method, of assemblingv the, twogrube
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and capable of being-madeoflightvmaterial, such bing-faces as va unit.
‘The same numerals of reference arefused, to
as thin sheets of metal, yet rigid to, resist, ‘with
10 out undue springing or bending, the stressesv that designate. corresponding ‘parts in the;v several
are produced by bearing downandrubbing when views. ’ , _‘
The rectangular framed the wash-board is
The claimed invention consists principally of composed of the side bars v1‘ and} 2,, and thegtop
an . improvedw arrangement of} ‘two, corrugated cross-bar 3, bottom cr0ss§bar4 and intermediate >
cross-bar 5, and may be of the usual or "any-suite
15' sheets formed and co-operating so that each rub
bing face of the wash-board will provide a‘sub able construction.v ,
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stantially equal degree v:of stiffness and rigidity ‘ _-‘_Thevrubbing element of my improved-and novel
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.f.
for the other rubbing face and also to present
surfaces of different working characteristics, one
20 for washing ordinary goods, the other for deli
cate fabrics. The corrugations of the ?rst men
tioned sheet extend across the direction of rub
construction is seated at its side edges in suitably
shaped grooves in the side-bars 1 and 2 of the
frame, at its top edge in the grooved intermediate 20
cross-bar 5, and at its bottom edge in the grooved
bottom cross-bar 4. In the construction shown
bing and of the other substantially lengthwise the rubbingelement is composed of two corru
thereof.
The sheets are secured together back gated sheets 6, 7 of thin sheet metal laid back to
back. ‘Each sheet is formed, as by co-rrugating, 25
25 to back in bearing engagement at the crossings
and present mutually supporting‘ elements ar to present parallel series of alternating work
ranged in grid-like pattern that provides symme engaging ridges, or ribs 8 and work-engaging
try and equivalence of bracing for both rubbing channels, troughs, or grooves 9 in the form of sim
ilar ar‘rises, uniformly spaced or substantially so.
faces.
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'Heretofore double wash-boards with sheet metal In addition the sheets may be embossed in known 30
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rubbing faces have had their faces provided with manner. The sheets are disposed so that the
longitudinal ribs, and the two sheets have been arrises of one cross those of the other. In the ex
placed back to back with their longitudinal ribs ample herein shown they, are perpendicular, to
give pointv contacts,‘ but they ‘may cross at any
parallel and in contact lengthwise. Such ar other
suitable angle appropriate to attain the re
3 rangement produced a double-faced board that
sults herein set forth.
was resistant to bending along lines extending
Under the normal stresses of use each channel
from the top edge of the board to the bottom, but
the two sets of ribs, being parallel and contigu
ous, afforded practically no resistance to bending
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along lines, extending across theboard from one
upright edge to the other, and consequently pro
wall or groove, as 9 of one face presents a trans
verse beam-like support for all or most of the
several channel Walls of the other, faces. Each
corrugated, sheet is thus supported at a great
number ' of
approximately
equidistant
points ‘
duced unequal degrees of bracing, or what may spaced closely together over its entire area. Each
be termed non-symmetrical bracing for the‘ two such point of support rests upon a channel wall ~
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of the opposing sheet and that wall is in effect
45 rubbing faces.
The means by which I have remedied such de a beam extending from edge to edge of the rub-v
fects of earlier double-faced boards will now be bing face. Otherwise stated, the surfaces of the
described, reference being had to the accompany two sheets are preferably in the form of uniform
ing drawing, in which:
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_ or similar arrises or corrugations mutually per
Fig. 1 is a front face View of a wash-board em
pendicular to give only point contacts or bearings.
bodying my invention.
The embodiment here shown as a preferred
Fig. 2 is a rear view of the same, partly broken form of my invention has equally spaced point
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bearings or contacts at the crossings arranged in
Fig. 3 is a central vertical section on line '3--8 what may be termed a symmetrical gridlike pat
away.
66 of Fig. 2.
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tern by which the two sheets are equally braced
1,987,232
in both directions, and’ they are held together so the edges of the two sheets together is disclosed
and claimed in co-pending application Serial No.
as to constitute a unit that is rigid in itself.
Preferably the two sheets 6 and '7 are arranged 737,484, ?led July 30, 19347, by Charles W. 'Saden
as shown, the ridges and grooves of one sheet
water, common assignee.
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Having thus described, my invention, whatI
being at right angles to those of the'other and
in bearing arrangement therewith.
In Fig. 6, showing an enlarged fragmentary
view, the edges/10,‘ llof theztwosheets-are shown
attached by folding so 'as'to lapover one-‘upon
10 the other. By thus ?xing together two or more
claim and desire to secure by'Letters Patent is:
1. In a wash-board, two rubbing faces made
ofcorrugated-sheet meta}, each-presenting simi- '~
lar alternating work-engaging arris
ridges
and channels substantially uniformly spaced, 10
edges of the two superimposed sheets the double gsaid sheets being secured in back to back en-'-~
working surface 6, 7 can be fabricated so“ as to
gagement, the ridges
constitute a unitary double-faced rubbingele
sheet extending across ‘those, of the other sheet
and > channels of each
ment, and these unitsv can-beeasily and;quickly tsubstantiallyiatrightangles‘to give mutual con
V15 inserted in the frame when ‘the wash-board is _
being assembled.
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‘;substantially ‘equi-distant and de?ning a
iigltidélike pattern,_=each channel of one sheet con
Another advantage is attainedby the arrange: stituting a .transverse supporting member ‘for
ment of the corrugated rubbing surfaces as above each of‘ the several‘ channels of the other sheet
described.
The horizontally arrangedcormga-w when 'therlatter is subjected to stresses incident
20 tions of sheet '7 are well adapted for washing
to its use as a rubbing surface.
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vmostirinds ‘of go0ds,lI-but the ~-vertical=arrange
ment of corrugations'in sheet 6 is especially well adapted ‘Ionwashing ordinary 'goo'ds,’in*which‘ the adapted for washing i?ne‘ fabrics, such ‘as ilinen corrugations extend substantially perpendicular
handkerchiefs, silk‘Iingerie,
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etc.
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The ‘wash-board above -described ‘is ‘inexpen
to the direction of rubbing, the other for delicate
‘fabrics, in which the 5 corrugations extend-"sub :25
sive 2in construction and v‘the rubbing surfaces stantially lengthwiseioflthe-‘directionv of rubbing,
are lexceedinglystrongpbut lightyboth sheets to said ‘faces ' being @made of‘ corrugatedvv sheet’ metal _ I
gether weighing less than the-single-‘sh‘eet-of an securedltogether, the-two presenting similar‘ sube
-ordinary"boar'd with one rubbing ' face vwherein
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the metal>has tobe made thick enough to with
stantially'v uniformly spaced ‘ridges and channels‘,
the? channels of each sheet: being-i‘arrangiedsubé 30
stantially perpendicular ‘to’ those of itl'ie' other
stand bending both laterally‘ and ‘vertically. '~ _~
' Theunitary construction indicated-in Fig. 6 sheet and in bearing engagement therewith'a't
‘facilitates ‘manufacture. andreplacement, and/the the crossings, and constituting transverse 'sup
washeboard ,has ‘numerous advantages‘ ‘as an ports therefor arranged in ig'ridélike ! patterns to
35 article of manufacture in addition to the desir
able features
above
described.
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’An improved'means for binding and-securing
provide'symmétryT of "bracing ‘for both‘lrubbing *