Transmission Chain or Belt. Page: 2 of 3
[1], 2 p. : ill. ; 23 cm.View a full description of this patent.
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UNITED STATES PATENT OFFICE9
JOHN LYNN, OF ALICE, TEXAS.
TRANSMISSION CHAIN OR BELT.Specification of letters Patent.
Patented Oct. 16, 1917.
Application filed August 26, 1916. Serial No. 116,973.
To all whom it may concern:
Be it known that I, JoHN LYNN, a citi-
zen of the United States, and a resident of
Alice, in the county of Jim Wells and State
5 of Texas, have invented a new and Im-
proved Transmission Chain or Belt, of
which the following is a full, clear, and
exact description.
My present invention relates more par-
10 ticularly to the chain forming the subject
matter of United States Letters Patent,
granted to me May 30th, 1916, No. 1,185,338,
the principle of which is that. resilient ele-
ments provided on the chain links are
15 adapted to have an elastic yielding contact
with the surface of the drive and driven
pulleys, whereby to maintain a constant
pressure for effective driving, and be auto-
matically maintained taut, while having
20 great flexibility. The invention is espe-
cially useful as a substitute for leather drive
belts on automobiles and other machines
where the belts are subjected to heat, water,
oil, and dirt, which are destructive of the
25 belt and make it at all times difficult to
maintain the belt tight on the pulleys.
The present form of my invention is more
especially designed for embodiment in a
chain or link belt, for use on flat-face pul-
30 leys whereas the construction illustrated in
my patent above referred to is more par-
ticularly adapted for flanged or grooved
pulleys.
Reference is to be had to the accompany-
35 ing drawings forming a part of this speci-
fication in which similar reference chakr-
acters indicate corresponding parts in all
the views.
Figure 1 is a longitudinal vertical section
40 of a portion of a transmission chain em-
bodying my invention, the section being
taken on the line 1-1, Fig. 2;
Fig. 2 is a plan view of two connected
links;
45 Fig. 3 is an inverted plan view thereof;
Fig. 4 is a fragmentary side elevation
partly in section showing the position of
the chain links on the pulley;
Fig. 5 is a plan view of the blank from
50 which my improved link is formed.
In forming a chain in accordance with
my invention the same is made up of links
10 having suitable means for pivotally con-
necting the same, there being shown for
55 the purpose a transverse pin 11 directly
'iting adjacent links,All the links in the chain may be alike,
each having fingers formed thereon pro-
jecting longitudinally from opposite trans-
verse edges. In the illustrated example, 60
three resilient fingers 12 are produced at
one edge and two resilient fingers 13 at the
opposite edge. The fingers at the opposite
edges are in staggered relation, there being
provided alternating with the respective 35
fingers, spaces 14, the spaces at one edge
accommodating the fingers of the opposite
edge.
The links are formed from a blank of
sheet metal which is shown in Fig. 5, on 70
which several fingers are produced in the
plane of the blank. The fingers are then
turned under as shown best in Fig. 1. The
links are thus given bends to accommodate
the connecting pin 11, the bend preferably 75
being in the fingers adjacent to the bases
thereof.
With the fingers bent at the under side
they will be disposed at an angle to the body
of the plate so as to be capable of flexure to- 30
ward a plane parallel with the body of the
plate. The resilient fingers form a contact
surface with a pulley A as indicated in Fig.
4, and in passing about the pulley in con-
tact with the periphery thereof, the driving L5
strains will press the resilient fingers with
more or less force against the pulley, there-
by maintaining the chain taut at all times
and thus increasing and making uniform
the driving power of the belt. It will be 90
seen that the bent fingers are disposed longi-
tudinally of the belt, the fingers at one end
being in the direction of traveling while the
fingers at the opposite end are reversely dis-
posed. The alternating fingers of a link 95
form practically a complete surface at the
inner side of the link and the corresponding
fingers of adjacent links are similarly dis-
posed and the terminal of one finger over-
laps or is adjacent to the base of the corre- 100
sponding finger of the next link so that
throughout the belt a substantial resilient
contact is effected with the pulleys.
It is to be understood that in practice the
links are made of spring steel or other re-
silient metal.
Having thus described my invention I
claim as new, and desire to secure by Letters
Patent:
1. A transmission chain including a plu- 110
rality of links provided with spring fingers
thereon to give i flexible yielding contact1,243,53.
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Lynn, John. Transmission Chain or Belt., patent, October 16, 1917; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth853541/m1/2/: accessed June 30, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.