Improvements in and relating to Gear Cases for Cycles.
Year: 1893

page_text: Date of Application, 10th Oct., 1893
Complete Specification Left, 10th Aug., 1894-Accepted, 6th Oct., 1894
PROVISIONAL SPECIFICATION.
Improvements in and relating to Gear Cases for Cycles.
We, THE NEW HOWE MACHINE COMPANY, LIMITED of Bridgeton, Glasgow,
Lanarkshire, and ALFRED MACDONALD, Manager to said Company, do hereby
declare the nature of our invention to be as follows:-
This invention has reference to and comprises improved modes and means of
constructing cases or frames for enclosing the driving chain gear of cycles, and
whereby they can be adjusted or detached expeditiously and with ease.
These gear cases can by our improvements be made to telescope or fit into each
other in two parts either transversely or longitudinally.
Under one simple arrangement the case would be made in two parts which would
telescope into each other transversely. This would be effected by making each
part in the form of two limbs through which the chain would pass, joining an end
ring body, one half of which would be hinged so as to open up when mounting same
over the chai wheel axle, and then closed and secured by sliding or spring clips or
equivalent fastenings, a hole being formed in the centre of body for the axle to work
through. When connecting up, the limbs of one of these parts would telescope
into and be secured within those of the other part. The case would be secured by
straps to one of the chain stay rods, and slots or grooves would be formed in the
case at the parts on which the stay bears.
Under a modified arrangement in which the ends of the case do not require
to open up on hinges a longitudinal strip would be mounted on the inner surface of
one of the limbs of each part and be bent over at the edges so as to receive the
correspondingly shaped edges of the other open part which telescopes over same.
Longitudinal moving shutters or strips would be made to slide in grooved guides on
each side of the case at the parts where the chain wheel axles pass through, and
transverse sliding shutters would be mounted to slide in grooved guides formed in
the ends of the aforementioned longitudinal sliding strips.
Under another arrangement the case is made in two longitudinal hollow parts,
and the meeting edges of these parts are made to fit or telescope the one over the
other longitudinally at the centre of case and come and abut against bearing beads
or ledges. While adjustable sliding shutters may be used at one or both ends where
the gear axles pass through. In this arrangement part of the case would be cut
away at the centre on opposite faces for the carrying stay rod to pass through, and
these parts would be covered with rubber or other material on the inner edges
secured in grooves or otherwise, to prevent ingress of dust within the case.
Under another arrangement but which would not be telescopic the case would be
formed as a flat hollow chamber to receive the chain, with a crosshead at the one
end and recess at the other for the stay rod to pass through; and one of the
longitudinal sides of case would be made to open up on hinges and be secured by
pins and sockets at the other side; while the two ends would be made to open up
on hinges as in the arrangement first described, and sliding shutters be used where
the axles pass through.
Dated the 9th October 1893.
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.

page_text: improvements in and relating to Gear Cases for Cycles.
We, THE NEW HOWE MACHINE COMPANY LIMITED, of Bridgeton Glasgow,
Lanarkshire, and ALFRED MACDONALD Manager to said Company do hereby
declare the nature of our invention and in what manner the same is to be
performed to be particularly described and ascertained in and by the following
statement in writing, that is to say :-
This invention has reference to and comprises improved modes and means of
constructing cases or frames for enclosing the driving chain gear of cycles aud
whereby they can be adjusted or detached expeditiously and with ease.
These gear cases can by our improvements be made to telescope or fit into each
other in two parts either transversely or longitudinally.
And in order that this said invention and the manner of performing or carrying
the same into effect or practice may be properly understood there is hereto
appended an explanatory sheet of drawings in which the same reference letters are
used to indicate corresponding parts in all the figures where shown.
Figures 1 and 2 are longitudinal elevations of the opposite sides of a gear case as
constructed in accordance with our improvements.
Figures 3 and 4 are corresponding views of a modified arrangement of our
improvements.
Figures 5 and 6 are likewise corresponding views of another modification of our
improvements, and
Figure 7 shows the gear case represented in Figures 5 and 6 complete and
opened up.
Referring to these drawings under one simple arrangement as shown in Figures 1
and 2 the case would be made in two parts which would telescope or fit into each
other transversely. This would be effected by making each part in the form of two
limbs a, b, through which the chain would pass, with an end ring body part e chaving
semicircular end covers which would be hinged at c¹ so as to open up when
mounting same over the chain wheel axle and also the driving wheel axle of cycle
after which operation the covers would be closed and secured by hand screws c² or
by sliding or spring clips, or equivalent fastenings, holes being formed in the
centre of body for the axles to work through.
When connecting up the limbs of one of these parts 6 would telescope or fit into
and be secured within those of the other part a at et abutting edges being formed on
the limbs a, b, to prevent them being pushed home further than is necessary.
The case would be secured by straps d to one of the chain stay rods, and slots or
grooves would be formed where required in the case at the parts on which the
stay bears.
Under another arrangement as shown in Figures 3 and 4 the case is made in two
longitudinal hollow parts A B, and the meeting edges of these parts are made to fix
or telescope the one over the other longitudinally at the centre of case that is the
projecting lips on the upper part A of case fit or telescope into pockets formed on
the inside of under part B as shown by dotted lines in both figures and come and
abut against bearing beads or ledges at A' formed on each half of case the whole
being secured by hand screws con ends of case as indicated. While adjustable
sliding shutters C may be used at axle holes c³ on one or both ends of case where
the gear axles pass through. Said shutters C being guided at their edges between
projecting guides C1 and this arrangement of adjustable shutters is also shown as
used in Figures 1, 2, 5, 6 and 7 as indicated in the drawings. In this arrangement,
Figures 3 and 4, part of the case would be cut away at the centre on opposite faces
at D for the carrying stay rod of cycle to pass through, and these parts would be
covered with rubber or other material on the inner edges at D' secured in grooves

page_text: or otherwise to prevent ingress of dust within the case. With this arrangement the
gear case can be removed without requiring to remove the driving wheel of
cycle.
Under another arrangement but which would not be telescopic as shown in
Figures 5 to 7 the case would be formed as a flat hollow chamber A to receive the
chain with an eye recessed crosshead or securing strap A' at the one end and
a grooved recess A' with strap d at the other for the stay rod to pass through and
be secured, and one of the longitudinal sides A" of the case would be made to open
up on hinges A' at the one edge and the two parts be secured together by pins and
sockets at A at the other edge while the two semicircular ends would be made to
open up on hinges at cas in arrangement first described, but in this case a
projecting fixed bead would be formed at c at one of the ends of the hinged
part A for the hinged part e to fit over and into when the said part A" is in its
closed position. The semicircular end in this arrangement being secured by spring
catches c formed either on the case itself or on end covers, and sliding shutters
and guides C' may be used over the holes c where the axles pass through as in the
other arrangements.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
:-
First. The constructing of gear cases of cycles to telescope or fit into each other
in two parts either transversely or longitudinally substantially as herein described
in reference to and by way of application shown in the accompanying drawings.
Second. The construction or arrangement and combination of the parts of the
gear cases of cycles substantially as herein described in reference to and shown in
the accompanying drawings.
iL. nuLני.
At 1904