Improvements in Gear Cases for Velocipedes.
Year: 1895

page_text: Date of Application, 5th Dec., 1895
Complete Specification Left, 5th Sept., 1896-Accepted, 10th Oct., 1896
PROVISIONAL SPECIFICATION.
Improvements in Gear Cases for Velocipedes.
1, GEORGE ELLARD MARSHALL of 6, Grove Terrace, North End Road,
West Kensington, in the County of Middlesex, Cycle Engineer, do hereby declare
the nature of this invention to be as follows :-
This invention relates to certain improvements in gear cases for velocipedes, and
it has for its object enabling such cases to be more readily fitted to the frames of
velocipedes, and further to enable such cases to be so fitted that the driving
chain runs in the centre of the case, whereby all liability of the chain to rattle
against the sides of the case is avoided.
According to my invention I attach the case to the frame of the machine first
by a running attachment mounted on the axle carrying the driving wheel and
secondly by clamping it to a split clip bracket mounted on the member of the lower
back fork of the frame of the machine. The running attachment consists of a
washer adapted to be placed on the axle carrying the driving wheel and to be
clamped between the shoulder on the said axle and the end of the back fork by
the usual nut on the end of the axle. The said washer consists of a series of
plates forming by and between them a series of grooves on each side of the axle
with which the edges of the usual slot in the outside of the cover of the case
slides thereby allowing the transverse position of the case to be varied with respect
to the driving chain within certain predetermined limits. To enable the front part
of the case to be also adjusted with respect to the driving chain the split clip
bracket carries two vertical studs and the side of the case adjacent thereto carries
two slotted brackets adapted to engage with the aforesaid studs and to be clamped
to the clip bracket carrying the said studs by means of nuts screwed on the
said studs.
The parts of the sides of the case which are adapted to fit over or around the
part or parts of the frame passing through or out of the said gear case are made
of soft and pliable material such as sheet brass so that they may be made to
readily conform to the configuration of such parts. For instance where the
member of the lower back fork passes from the outside of the case into the
interior thereof as is usual in most machines, the semicircular part of the case
adapted to surround the said tube is formed of sheet metal split longitudinally
and having its edges overlapping so that the size of the said part can be expanded
or contracted according to the diameter of the tube it is intended to cover, one
part of the end of the said semicircular part being lapped over the other part to
form a grip between the parts after the proper adjustment has been obtained.
Dated this 5th day of December 1895
ROBERT E. PHILLIPS, Assoc. M. Inst. C.E., M.I. Mech. E.,
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicant.

page_text: Improvements in Gear Cases for Velocipedes,
I, GEORGE ELLARD MARSHALL of 6, Grove Terrace, North End Road, West
Kensington, in the County of Middlesex, Cycle 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 certain improvements in gear cases for velocipedes, and
it has for its object enabling such cases to be more readily fitted to the frames of
velocipedes, and further to enable such cases to be so fitted that the driving chain
runs in the centre of the case, whereby all liability of the chain to rattle against
the sides of the case is avoided.
In the accompanying drawing:-
Figure 1 is a view in side elevation showing the front of a case embodying my
invention.
Figure 2 is a similar view of the back side thereof.
Figure 3 is a view in transverse section on line x x Figures 1 and 2.
Figure 4 is a view in transverse section on line y y Figures 1 and 2, and
Figure 5 is a view in transverse section-on an enlarged scale-of the washer
for the axle of the driving wheel.
Throughout the views similar parts are marked with like letters of reference.
According to this invention the case is attached to the frame of the machine
first by a running or sliding attachment mounted on the axle carrying the driving
wheel and secondly by a split clip adjustably mounted on the gear case and
adapted to be clamped on to the member of the lower back fork of the frame of
the machine.
The running or sliding attachment consists of a compound washer A adapted to
be placed on the axle carrying the driving wheel and to be clamped between the
shoulder on the said axle and the end of the back fork by the usual nut on the
end of the axle. The compound washer A consists of a series of plates a a etc.
forming by and between them a series of grooves with which the edges of the
slot in the sliding end B of the case engage and slide thereby allowing the
transverse position of the case to be varied with respect to the driving chain. To
enable the other part C of the case to be also adjusted transversely with respect to
the driving chain the split clip D adapted to be fixed to the lower back fork of
the machine is mounted to slide between two brackets E, E fixed to the part C
of the case and to be fixed thereto by means of clamping screws such as d d passing
through slots in the brackets E, E.
The part C of the case may be constructed in the manner set forth in my prior
Patent No. 11688 of 1892 or in any other manner such for instance as shown by
Figures 1, 2 and 4 of the accompanying drawing in which the off side C¹ of
the part C is made detachable for convenience in mounting and dismounting on
the frame of the machine, and in this case I prefer to mount the brackets E, E on the
said part.
The parts of the sides of the case which are adapted to fit over or around the
part or parts of the frame passing through or out of the said case are made of soft
and pliable material such as sheet brass so that they may be made to readily
conform to the configuration of such parts.
For instance where the member of the lower back fork passes from the outside
of the case into the interior thereof as is imperative in most machines, the part
adapted to fit against the said tube is formed of thin pliable sheet brazed to the
other part of the case and preferably split longitudinally so that its edges overlap,
thereby allowing the said part to be conveniently expanded or contracted to fit

page_text: snugly around the tube of the frame. I prefer however to form these parts as
separate plates such as F adapted to be attached to the sides of the case by slides
in the well-known manner as shown by the accompanying drawing.
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.) The improvements in gear cases for velocipedes substantially as hereinbefore
described.
(2.) In a gear case for velocipedes providing for its transverse adjustment with
respect to the driving chain in the manner herein before set forth.
(3.) In a gear case for velocipedes, the method herein before described of
enabling the sides of the case to be easily and readily made to conform to the
member of the lower back fork of the frame passing through the case.
71
ROBERT E. PHILLIPS, Assoc. M. Inst. C.E., M.I. Mech. E.,
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicant.