Improvements in Sprocket Wheels.
Year: 1894

page_text: Date of Application, 9th Oct., 1894-Accepted, 10th Nov., 1894
COMPLETE SPECIFICATION.
.Improvements in Sprocket Wheels.
We, PETER D. MURPHY and EDWARD KOLB, Machinists, of Lockport,
Niagara County, New York State, United States of America, 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 certain new and useful improvements in wheels and
particularly to sprocket wheels the following being such a full clear and exact
description of the same as will cuable others skilled in the art to which it appertains
to make and use the same.
The object of the invention is to provide novel means for increasing the diameter
of sprocket wheels to compensate for the extension of the chain incident to long
use, it being well known that the joints of such chains become worn and that the
distance between the links is greater in consequence this causes the chain to run
upon the sprocket teeth and results in increased wear on both the wheel and
the chain.
A further object of the invention is to arrange the parts in such a manner as to
make varying adjustments possible in accomplishing the results above set forth as the
wear on the chain increases and requires the increased diameter, furthermore, in
providing means to this end which are strong and durable, efficient and
comparatively inexpensive of manufacture.
With these and other objects in view, the invention consists in the various novel
details of construction, arrangement and combinations of parts to be hereinafter
more fully described and specifically pointed out in the claims.
In describing the invention in detail, reference is had to the accompanying
drawings forming part of this Specification and wherein like characters of reference
indicate corresponding parts in the several views, in which :-
Fig. 1, is a view in side elevation of a sprocket wheel with our improvements
applied thereto in several degrees of adjustment.
Fig. 2 is a central sectional view of the same.
In these drawings, 1, denotes a sprocket wheel of ordinary construction, with a
chain 2, applied engaging the teeth thereof; 3, the adjustable metal plates secured
in position between the teeth of the wheel, and held in place by screws 4, engaging
the periphery of the wheel. The plates 3, are made adjustable by the interposition
of packing 5, which may consist of metal or fibrous substance ae desired and the
thickness thereof being varied to produce the result sought, the particular
adjustment depending upon the chain. In most cases, the plates without the
packing would answer for the first adjustment. The packing further serves to
materially lessen the noise caused by the chain moving over the wheel, especially
if leather or soft metal is used.
The advantages of the invention as well as the construction and operation will be
apparent from the foregoing.description, and it will be noted that changes may be
made in the details of construction, without departing materially from the general
idea involved.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed we declare that what we
claim is:
1. A sprocket wheel having removable plates adapted to fit between the teeth, for
the purnose described.

page_text: 2. In a sprocket wheel, the combination with the wheel, of plates adapted for fit
on the periphery thereof between the teeth, with interposed packing, for the purpose
described.
3. A sprocket wheel having removable plates secured between the teeth, in
length equal to the distance between said teeth, as and for the purpose described.
Dated this 9th day of October
TONGUE & BIRKBECK,
34, Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicants.