A New or Improved Device for Placing Belts on Pullies, Sheaves, or Flywheels while in Motion.
Year: 1891

page_text: Date of Application, 19th Nov., 1891
Complete Specification Left, 28th Apr., 1892-Accepted, 4th June, 1892
PROVISIONAL DUECIFICATION.
A New or Improved Device for Placing Belts on Pullies, Sheaves,
or Flywheels while in Motion.
I, SAMUEL DONKIN of 5 Dean Terrace Sonthwick, Sunderland in the County
of Durham, Engine Fitter do hereby declare the nature of this invention to be as
follows:
This invention relates to a new or improved device for placing belts on pullies
sheaves or flywheels while in motion and consists in the provision of a gradually
increasing curve commencing from or about the surface of the shaft or axle and
terminating at or about the periphery of the sheave pulley or flywheel.
It may be formed in one with the sheave pulley or flywheel and on one or both
sides thereof or it may be formed by building it up from or about the shaft to or
about the periphery aforesaid. For preventing a belt accidentally getting into
gear when not so required, a small flange or projection may be provided on the
shaft over which the belt can be lifted by a rod or stick or equivalent appliance.
Dated this 19th day of November 1891.
A. CRAWHALL CHAPMAN,
Newcastle-on-Tyne, Patent Agent.
COMPLETE SPECIFICATION.
A New or Improved Device for Placing Belts on Pullies, Sheaves,
or Flywheels while in Motion.
I, SAMUEL DONKIN, of 5 Dean Terrace, Southwick, Sunderland, in the County
of Durham, Engine Fitter, 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 :-
This invention relates to a new or improved device for placing belts on pullies
sheaves or flywheels while in motion and consists in the provision of a gradually
increasing curve commencing from or about the surface of the shaft or axle and
terminating at or about the periphery of the sheave pulley or flywheel.
It may be formed in one with the sheave pulley or flywheel and on one or both
sides thereof or it may be formed by building it up from or about the shaft to or
about the periphery aforesaid. For preventing a belt accidentally getting into
gear when not so required, a small flange or projection may be provided on the
shaft over which the belt can be lifted by a rod or stick or equivalent appliance.
I will fully describe my invention with reference to Figures 1 and 2 of the
accompanying drawings which are respectively a side view and a plan of a pulley
or disc fitted with what I may term my belt hoop.
In the drawings a is an axle carrying a pulley sheave or flywheel b. In ordinary
work this sheave will be fitted on a shaft opposite or corresponding to the loose
pulley of a pair of fast and loose pulleys on another shaft. c is a bent metal bar
connecting the periphery of the sheave or disc with a point on or near its shaft
periphery.
The bare may be secured as shown in the drawing by having its inner end
flanged over and bolted to the inside flanges of the collar e' which in turn is
secured to the shaft as shown, while from the point where the bent bar meets the
sheave periphery to its extremity at it may be secured by straps and bolts, the
latter having countersunk heads to avoid cutting or damaging the belt.

page_text: In practice when the belt is thrown off the sheave it is prevented from
returning thereonto by the flanges of the collar el but immediately it is required to
refix the belt on the sheave for the purpose of transmitting power, then instead of
the dangerous and cumbersome methods at present employed, I simply lift by
means of a stick or equivalent appliance the slack of the belt onto the surface of
the bar cas near the shaft as is convenient and as the sheave is revolving the belt
is instantly carried up the bar or hoop and thence into its required position on the
sheave. It will be observed that the bar e is made widest nearer the shaft whence
it diminishes in width to its extremity as towards, the latter portion the belt will
travel partly on the sheave and partly on the bar.
In throwing a belt off a sheave, the belt is pushed over the hoop, and then it
falls onto the shaft.
If desired belt hoops may be provided either cast or built up as hereinabove
described on both sides of a sheave or pulley but one fitted according to the
direction of travel of the pulley will usually be sufficient.
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. For placing belts on pulleys, sheaves or flywheels while in motion, the use of
a bent bar connecting the periphery of the pulley, sheave or flywheel with a point
near the periphery of the shaft or axle carrying the pulley, sheave or flywheel
substantially as herein described and illustrated.
2. The use in combination with a pulley sheave or flywheel of means for
enabling a belt to be put on any one of them while in motion consisting of a bent
hoop secured alongside the pulley sheave or flywheel and connecting their
peripheries with the peripheries of the shafts or axles on which they run, the
several parts being arranged and designed to operate substantially as herein set
forth.
Dated this 5th day of 1000
A. CRAWHALL CHAPMAN,
3, St. Nicholas Buildings, Newcastle-on-Tyne, Patent Agent.