Improvements in Belt and Rope Gear for the Transmission of Power.
Year: 1896

page_text: Date of Application, 15th Apr., 1896-Accepted, 30th May, 1896
COMPLETE SPECIFICATION,
[Communicated from abroad by WILLIAM MAYBACH, of Cannstatt, Wurtemberg,
Germany, Engineer.]
Improvements in Belt and Rope Gear for the Transmission of
Power.
1 FREDERICK RICHARD SIMMS of 49 Leadenhall Street London in the County
of Middlesex Civil Engineer do hereby declare the nature of this invention and
in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :-
The object of the arrangement hereinafter described is to render mechanism for
throwing driving belts or cords in and out of gear applicable to belt or cord
driving gear with co-axial pulleys.
For this purpose, stationary guides or rests are placed a short distance from the
stretched belt; the belt, when out of gear, becoming embedded in, or forced into,
these rests (while still resting upon tension rollers) and being so guided therein,
that the pulleys become disengaged from the belt, so that the operation of rendering
the belt inoperative is thereby completed.
The arrangement is shown in the accompanying drawings:-A is a driving
pulley, B a driven pulley, and C a tension roller situated in the less tightly
stretched portion of the belt, and C, is a guiding roller situated in the more tightly
stretched portion of the belt; and D and D₁ are the rests or guides arranged at
short distances from the driving pulleys.
In Figures 1 and 2 the belt is shown in contact with the pulleys A and B. When
it is required to throw the belt out of gear, the tension roller C is lowered by any
well-known device, (that shown in Figs. 3 and 4 in the drawings consists of a
lever H pivoted at ), the belt e is also lowered and, while resting upon the tension
rollers at the top, enters the rests or guides D, D₁, with the result that the pulleys
become entirely disengaged from the belt, which is thus effectively brought to a
position of rest, even though either one or both of the pulleys should continue in
operation.
The guiding roller C₁ may be fast; but to avoid the necessity for adjusting the
length of the belt owing to its becoming stretched the tension roller C is also
movable aud capable of adjustment. This may be effected in various ways and by
well-known means. As shown in Fig. 5, the result is attained by means of the
lever H, pivoted at hand carrying the guiding roller C, at c₁ while at i it is
provided with a "tapped" cross-piece which by means of the screws that is
supported at k, may be raised or lowered.
The device may be used as a substitute for an ordinary disengaging coupling
between two separate shafts or spindles, and it has this advantage that such shafts
need not be precisely in alignment one with the other; further it may be employed
as a coupling between two pulleys, one fast and one loose, mounted upon a common
shaft.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:
1. An arrangement for throwing belts or cords in and out of gear by means of
tension allows for dining hal

page_text: 2. In the arrangement characterized in the first claim, the adjustability of the
guiding roller for the purpose of regulating the tension of the belt.
Dated this 15th day of April 1896.
E. H. G. BREWSTER,
Agent for Applicant.