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Патент USA US2411874

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Dec, 3,1946,
Patented Dec. 3, 1946
PATENT orgies
Milton E. Golden, Chicago, 111.
Application November 27, 1943, Serial No. 511,930
2 Claims.
(01. 64-32)
(Granted under the act of March G.
3, 757)
1883, as
amended April 30, 1928; 3'70 0.
The invention described herein may be manu
factured and used by or for the Government for
governmental purposes, without the payment to
‘me of any royalty thereon.
washeris then slit to compose a split washer [2,
Fig. 2, the slit extending from the inner diameter
M of the washer to the outer diameter l6, thereby
providing the piece with two abutting ends “3
and 20.
The ends l8 and 2B of the split washers l2, Fig.
This invention relatesto ?exible boots of the
2, are then pulled apart as shown in Fig. 3, so as
kind employed to encase a mechanical structure
to compose of each piece an exaggerated lock
which is subject to elongation or bending in
washer shape ‘22, each piece thus composing one
operation. Boots of this class are employed-to
keep lubrication in, or'dirt out, or both, yet they 10 turn of a helix. Three pieces thus treated are
shown in Fig. 3, being numbered 22, 22a and 221),
must allow freedom of movement of the mech
the ends of the first piece being referred to as 18
anism within.
and 20, the ends of the second as l8a and 20a,
An object of the invention is to provide a boot
and the ends of the third as I81) and 20b.
of this description which may be made of readily
available material with minimum waste of stock 15 The adjacent ends of the several helical turns
22, 22a and 221) are next fastened together in
used and time consumed in the making.
some suitable manner being preferably sewn if
Another object of the invention is to develop a
the material is ?exible fabric, or being soldered
novel ‘method of producing the device which is
herein shown and described as an embodiment of
objects and advantages Will be evident as
the invention is further described and reference
~ is made to the drawing, wherein:
Fig. 1 shows a washer cut from sheet material,
this being a ?rst step in making one of the units
or welded if it is metal, the end 29 being joined to
lBa, 29a to I81), etc. When the several ends have
been thus joined together, a continuous helix 24,
Fig. 4, will have been formed, having an inside
helical edge Illa and an outside helical edge Ilia,
the individual convolutions being designated 24a,
2419,2150 and 24d.
When two helices M, as shown in Fig. 4 have
been provided, theymay be put together as shown
Fig. 2 shows the washer of Fig. l-after it has
in Fig. 5, the second helix, however, being as
been cut through on a radial line, this being the
signed the numeral 25 to facilitate description,
second step in the production of a unit of my
and its individual convolutions beingv for the
Fig. 3 shows a series of the cut washers of Fig. 2 30 same reason given the numerals 25a, 25b, 25c and
25d. The inner edge of the helix 25 will be re
after the ends, which were provided by the cuts,
ferred to as Mb and the outer edge ltb.
were drawn apart so as to. pull each washer into
After the two helices 24 and 25 have been
a somewhat exaggerated lock washer shape.
assembled as shown in Fig 5, the inner edges of
Fig. 4 shows a series of the lock washer shapes
of Fig. 3 with the end of one washer permanently 35 the two, that is, the edges Ma and “lb may be
laid together and sewn or otherwise joined as
joined to the beginning of the next so as to pro
shown in Fig. 6. The sewing together of these
vide, of the several separate washers, a continu
two edges will consist of one continuous seam
ous helix.
throughout the length of the helices. At this
Fig. 5 shows two of the helices of Fig. 4 laid to
gether with the convolutions of one alongside the 40, stage the outer edges i511 and Nib still lie along
side but are not fastened together.
convolutions of the other preparatory to joining
After the two helices 24 and 25 are thus joined
their edges.
at the inner edges Ida and Nb, the outer edges
Fig. 6 shows how the inner edges of the two
Ilia and Hib are pulled apart as shown in Fig. '7,
helices of Fig. 5 may be permanently joined,
while the outer edges lie contiguous but are not 4.5 and paired anew, that is, instead of 25a and 25a
of my device.
lying alongside, 25a will be paired with 24b, 25b
fastened together.
will be paired with 240, 25c with 24d, etc.
Fig. '7 shows how the outer edges of contiguous
When the outer edges are now sewn together
convolutions of Fig. 6 are drawn apart prepara
tory to securing them together, the one of one
in one continuous seam, the device will have as
50 sumed the con?guration of Fig. 8, that is, it will
pair to the other of the next pair.
Fig. 8 shows the drawn-together outer convo
have the form of a hollow V screw thread. Here
lutions after they have been permanently joined.
the inner edge of 24a. is paired with the inner
In the drawing, a series of washers l9, Fig. 1,
are preferably cut from a sheet of ?exible fabric,‘
or thin metal, as the case may require-
Each 55
edge of 25a, then the outer edge of 25a with the
outer edge of 2%, etc. Finally appropriate end
pieces 26 and 27 are joined to the ends of the
screw, their shape depending on the shape of the
part which is to be housed.
consists of cutting out a series of washers, radi
ally slitting said
In addition to the concentric helically shaped
exible boot made of circular discs of uniform
diameters as hereinbefore described, various con
acter indicated.
It is noted that since the boot is built in the
form of a helix it is obviously stronger than one
made of circular discs in the conventional man
ner, that is, sewn together along their inner and
continuous seam, the ?rst convolution of the sec-
ond helix to the second convolution of the ?rst
outer circumferences. Distortion and stresses 15 helix.
are transmitted in a helical direction to all sec
tions of the assembly simultaneously and uni
formly, thus making the working life of the boot,
made according to subJect invention, longer.
It is further noted that a boot made
to subject invention of
2. ‘Steps in the method of making a hollow ?ex
ible boot
1. The method of making a hollow ?exible boot
from relatively thin ?exible sheet material, which
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