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Патент USA US2106119

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Jan. ‘18, 1938.
I
T_ KRASSELT
2,106,1 19
MANUFACTURE OF ASBESTOS RINGS
Original Filed May 16, 1936 _
159. 1.
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Alt-a Phl'ys
Patented Jan. 18, 1938
' 2,106,119
UNITED STATES PATENT orrice'
2,106,119
MANUFACTURE OF ASBESTOS RINGS
Theodor 'Krasselt, ite'uth v/Neumark, Germany,
assignor of four-?fths to Maurice Presburg,
Paris, France, and one-?fth to George Angus &
Company Limited, vNe'wcastle-on-Tyn'e, Eng
‘ land,‘ a British company
'
Original application May-16,1936, Serial No.
80,154. Divided and‘ this application October,
10, 1936, Serial No. 105,142. In Germany June
25, 1935
2 Claims.
(01. 28-11)
This invention relates to the manufacture of the material constituting the loops which have
asbestos rings for packing, jointing, brake linings,
clutches and like purposes. ‘Hitherto such rings
actually been severed and then to use the end
of ,yarn unpicked from one ‘end for threading
have generally been stamped out from woven through the exposed loops of the two ends, the
end of this yarn being ?nally tuckedinto the 5
5 sheet with consequent considerable waste of ma
'fabric so that it can't come loose. When the
terial.
annulus so formed'is pressed ?at a knitted as
'
‘In my UnitedStates application Serial No.
bestos ring 30 isobtained which is of perfect cir
. 80,154 ?led- 16th May 1936, from which the pres
ent application is divided, I have described a cular form and exhibits no trace of any seam.
10 'method of treating asbestos yarn so as to render This ring is shown in plan in Figure 3 and hip10
it for the ?rst time susceptible of being knitted section in Figure 4. _
Where the ring is formed by cutting from a
on a machine without tearing and the object of .
the present invention is to provide a method woven asbestos sheet, the edges are weakened ow
of manufacturing rings ‘from knitted asbestos ing to the fact that the woven material is cut
‘5
fabric.
-
;
across the warp and weft threads. The mechan- 15 '
>
The method according 'to the invention will
now be explained with reference to the accom
panying drawing in which,
Figure 1 is a plan view of a stripof knitted as
30 bestos,
‘
ic'ally knitted rings made according to the in
vention do not suffer from this disadvantage as.
.they are knitted with ?nished edges, which is of
great importance in the case of rings used for
packing, jointing, vbrake linings, clutches and 2-0
>
.
Figure 2 shows the strip bent to conical form,w like purposes.
After manufacture the ring may be treated
Figure 3 is a plan view of the ?nished ring, and
Figure 4 is a section along the line III-III ‘ with any suitable ‘impregnant such as rubber.
The term “asbestos” as used herein ‘includes
. in Figure 3.
‘
‘
25
Figure 5 is a diagram illustrating the method 4- not only pure-asbestos, but also asbestos mixed 25
' ‘of knitting together the ends of a ?at strip to '
form the ring of the present invention.
' _
The method of procedure is as iollows:
' The rings are made by knitting asbestos yarn
30 in the form of a strip in the ordinary way ‘on a
with other ?brous material, suclras cotton, and
asbestos reinforced¢with brass wirei'or other
material.
'
e
.
'
.
What I claim as my invention and desire to
secure by- Letters Patent is:--
v
30
1. A method of manufacturing asbestos rings
for packing, clutches, brake‘ linings and like pur
wardly at an angle of 45°, long and short needles poses, which consists in bending into frusto-coni
alternating ‘in each bank, a long needle in one _cal form a ?at strip of the fabric‘formed byrknit-
standard ‘flat knitting machine. This machine
has two opposed banks of needles, extending up
35 bank being opposite a short needle in the other.
The operation of such machines in the knitting
of ?at strips is well known, and need not be'de
scribed. Said strip is cut into sections after
\ ~ . ' removal from the machine by cuts running aslant
40 the-length of'_’the strip. One such section is
shown at “23 in ‘Figure l, the slanting cuts be
ing indicatedati‘l. Theseimion~ is then bent into
a conicalvform- as shown in Figure -»2 and the
ends knitted together at?! this operation being
45 performed manually according to the method
of Figure 5. All that is necessary is to pick out
'
,ting asbestos on a machine,~knitting ‘the endsof 35 _
the strip together and ?nally pressing’ the strip
?at to give a circular ring.
'\
_ I
2. A method of manufacturing asbestos rings
for packing, clutches, brake linings and like pur
poses, which consists‘ in knitting asbestos on a 40
machine to form a ?at strip, dividing‘ the strip
into sections by cuttingit aslant its length, bend
ing into frusto-conical form a section so obtained, '
knitting the ends of the section together, and
?nally pressing it ?at to'give a circular ring.
-
'
THEODOR KRASSELT.
45
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