Improvements in and relating to Wheels for Ohain Driving Gear.
Year: 1896

page_text: Date of Application, 13th Aug.. 1896
Complete Specification Left, 13th May, 1897-Accepted, 19th June, 1897
Improvements in and relating to Wheels for Ohain Driving Gear.
I HARRY MORRISON 36 Buckingham Road Stratford E. Engineer, do hereby
declare the nature of this invention to be as follows:-
This invention relates to wheels for chain driving gear, the object being to
arrange the teeth upon the wheel so that they may he adjusted when the chain, or
teeth become worn.
I find that a convenient way of inaking this adjustment is to carry the teeth
upon links or supports which are pivotally connected together by any suitable
means such as slots and locking pins and the links or teeth bear upon inclined
surfaces or planes upon a ring or drum so that by altering the relative positions
of the ring or drum and the teeth, the distance of the teeth fro:n the centre or axis
of the wheel may be varied in a radial direction.
Deted this 19th note of 1900
E. EATON,
Agent for Applicant.
Improvements in and relating to Wheels for Chain Driving Gear.
I, HARRY MORRISON 36 Buckingham Road Stratford E. 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:-
This invention relates to wheels for chain driving gear the object being to
arrange the teeth upon the wheel so that they may be adjusted when the chain, or
teeth become worn.
I find that a convenient way of making this adjustment is to carry the teeth
upon links or supports which are pivotally connected together by any suitable
means such as slots and locking pins and the links or teeth bear upon inclined
surfaces of planes upon a ring or drum so that by altering the relative positions
of the ring or drum and the teeth, the distance of the teeth from the centre or axis
of the wheel may be varied in a radial position.
It has been found that when a chain becomes slack through use and wear it is
not possible to tighten this chain and at the same time to compensate for or take
up the wear of same between the links and although the chain may be tight
the links cannot fit closely upon the teeth. In order to overcome this difficulty,
I make the teeth or spurs radially adjustable. In order that my invention
may be fully understood I will now refer to the annexod drawing in which :-
Figure 1. is a side elevation partly in section showing a means of carrying out my
invention...

page_text: .
Figure 3. elevation of a modified form of my invention.
Figure 4. section through line a-y in Figure 3.
Figure 5 sectional side elevation of wheel.
Referring to Figures 1 & 2 a, are the teeth or spurs which are formed integral
with or attached to the links or connecting pieres 6 the ends c of which are
provided with slots d and the ends e are provided with holes through which a
pin passes. g is a ring or collar which has the inclined surfaces upon which
the ends of the teeth or spurs a engage. This ring or collar is supported
upon the periphery of the wheel or drum which is keyed or fixed to the axle
or spindle k. 1 are apertures in said wheel or drum through which the pins f
pass said pins being secured upon the outside of the links or connecting pieces b
by means of nuts or bolts or any such convenient means..
It will be seen that by rotating the ring g the inclined surfaces or planes
will cause the teeth or spurs to be moved from the centre of the wheel in a
radial direction as shown by the dotted line and arrow i and thus propor-
tionately increasing the distance between each tooth or spur, and so causing the
links of a chain to closely engage upon the teeth or spurs after having been
worn. It will be seen that any well known means for locking the parts in the
required position of adjustment may be employed an although I have shown in
the drawing a means of carrying this invention into effect I do not confine myself
to this particular arrangement as my invention consists in the radial adjustment of
the teeth or spurs upon a chain driving wheel and there are many mechanical
arrangements by which this object can be carried out, but I prefer the arrangement
as shown in Figure 1.
Referring to Figure 3 to 5 in this case the teeth a' are operated by means of the
pins n which aro carried by the teeth and engage in the incline slots n in the
plate or disc o. This plate or disc is provided with the rack or teeth p and by
operating the pinion g the plate or disc o may be turned upon the shoulder or
bearing r by which means the teeth are caused to move outward or inward in a
radial direction.
The teeth may have squares m² and pins m formed integrally upon same or
a pin having a square upon same may be employed to ensure the radial movement
of the teeth.
The shape of the teeth or angle of same may be varied to suit the class of
link or chain employed. Another feature of my invention lies in the fact that
the wearing of the teeth or spurs will not affect the links fitting closely upon the
teeth as will be readily seen and owing to this close fitting of the links upon
the teeth or spurs a great saving in wear is effected and a greater efficency
obtained and the noise or rattling caused by a loose fitting link upon a tooth or
spur is avoided.
It will also be seen that by decreasing the distance between the teeth or spurs
and the centre of the wheel various sizes of links or chains may be used.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, 1 declare that what
I claim is :-
1. The combined construction & arrangement of the various parts substantially
as described and illustrated herein.
2. In chain driving wheels, the radial adjustment of the teeth or spurs thereon
for the purpose described.
3. In chain driving wheels, teeth or spurs attached to or formed integral with
connecting links moveably attached or pivoted together around a sleeve or drum
having inclined surfaces or planes, said sleeve or drum surrounding the driving
wheel or the like which is keyed to the driving shaft or spindle; for the purpose
of enabling the teeth or spurs to be adjusted in a radial direction substantially as
described and illustrated.
4. In chain driving wheels a disc or plate operated by means of a
pinion or

page_text: the like said disc or plate having inclined slotes or grooves which operate the teeth
or spurs of the wheels in a radial direction through the medium of a pin or
projection carried by the teeth or spurs, said pin and projection being either formed
integrally with or passed through an aperture in said teeth or spurs.
Dated thie 13th dow of Mar 1907
E. EATON,
Agent for Applicant.