Mechanical Movement Page: 2 of 3
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UNITED STATES PATENT OFFICE.
JOHN STINE, OF BEAUMONT, TEXAS.
MECHANICAL MOVEMENT.1,100,009.
Specification of Letters Patent.
Patented Nov. 9,1915.
Application filed October 24, 1914. Serial No. 868,484.
To all whom it may concern:
Be it known that I, JOHN STINE, a citizen
of the United States, residing at Beaumont,
in the county of Jefferson and State of
5 Texas, have invented certain new and use-
ful Improvements in Mechanical Move-
ments; and I do hereby declare the follow-
ing to be a full, clear, and exact description
of the invention, such as will enable others
10 skilled in the art to which it appertains to
make and use the same.
This invention relates to mechanical
movements and has for an object to provide
a chain and sprocket movement with im-
15 proved means for maintaining the chain in
operatively taut condition and relation to
the sprocket wheel.
A further object of the invention is to
provide a mechanical movement having a
20 sprocket wheel and chain engaging along
one side thereof and with an idler movable.
concentrically with the sprocket and adapt-
ed to maintain the chain in engagement
with such sprocket.
25 With these and other objects in view the
invention comprises certain novel construc-
tions, combinations and arrangement of
parts, as will be hereinafter more fully de-
scribed and claimed.
30 In the drawings: Figure 1 is a view of
the improved mechanical movement in side
elevation showing a conventional drive.
Fig. 2 is a view of the mechanical movement
in edge elevation as indicated by arrow 2
35 at Fig. 1. Fig. 3 is a detail elevation of the
rigid arm carrying the movable idler
sprocket. Fig. 4 is a view in elevation of
the idler journal.
Like characters of reference .designate
40 corresponding parts throughout the several
views.
The improved mechanical movement
which forms the subject-matter of this ap-
plication comprises a shaft 10 driven in
45 any approved manner as the motor 11, the
style or type of motor forming no part of
the present invention, it being only neces-
sary to drive the shaft 10. Upon the shaft
10 a double sprocket wheel 12 is mounted
50 over one side of which runs the drive chain
13. Over the other side of the sprocket 12the chain 14 operates which passes over a
sprocket 15, the chain then passing on to
do other work as indicated by being broken
at 16 and 17. Adjacent the shaft 10 and 55
double sprocket 12 a curved brace arm 18 is
secured having a slot 19 concentric with the
shaft 10. In this slot 19 a journal 20 is
mounted to operate adjustably in any usual
and approved manner as by forming a re- 60
duced shank 21 defining a shoulder 22,
which bears against the brace arm 18 and
is provided with a nut 23 for clamping the
said shoulder 22 rigidly against the brace
arm 18. Upon this journal bearing 20 an 65
idler sprocket 24 is journaled and is main-
tained in position in any usual and ordinary
manner, as by the use of the cotter pin 25
inserted through the opening 26 of such
bearing. The sprocket 24 is of less radius 70
than the distance between the slot 19 and
the periphery of the double sprocket 12, so
that the teeth of the two sprockets do not
engage but afford sufficient interval for the
chain 14 to pass therebetween. 75
It will be apparent, especially from an
examination of Fig. 1, that by moving the
bearing stud 20 in the slot 19 the axis of the
idler 24 follows an are concentric with the
shaft 10 so that the sprocket chain 14 at 80
all times engages the greatest possible num-
ber of sprocket teeth upon the sprocket 12.
The idler 24 running adjacent the periphery
of the sprocket 12 also serves to hold the
chain in intimate engagement with the teeth 8b
of such sprocket 12.
In operation it is obvious that the tighten-
ing or loosening of the chain 14 as might
be required in operation would be accom-
plished by moving the axis of the idler 24 90
along the slot 19 in an obvious manner.
I claim:
In a mechanical movement, a plurality
of chains, mounting means therefor includ-
ing a plurality of sprocket wheels, a rotary 95
device constituting a portion of the mount-
ing means for each chain, the sprocket
wheels and rotary device being located in
substantially the same plane, one of said
chains engaging an arc of the rotary device 100
and the other chain engaging the comple-
mentary are thereof, and adjusting means
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Stine, John. Mechanical Movement, patent, November 9, 1915; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth858432/m1/2/?rotate=0: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting UNT Libraries Government Documents Department.