Improvements in or connected with Cases or Covers for the Chains or Gear of Velocipedes.
Year: 1893

page_text: Date of Application, 21st Jan., 1893
Complete Specification Left, 29th June, 1893-Accepted, 5th Aug., 1893
PROVISIONAL SPECIFICATION.
Improvements in or connected with Cases or Covers for the Chains
or Gear of Velocipedes.
I, HENRY BATE, of 11 Market Hill, Maldon, in the County of Essex, Cycle
Manufacturer, do hereby declare the nature of this invention to be as follows:-
My invention relates to improvements in or connected with cases or covers for
the chains or gear of velocipedes, and the object of my invention is to so construct
such cases as to enable same to be removed from the velocipede or to be replaced
thereon without the employment of tools or skilled labour, and if desired without
the removal from the case of any part thereof.
According to my invention I mount upon the bottom stay, that is to say, upon
the tube that usually runs from the crank axle bracket to the rear bearing or axle,
a frame composed of an upper and a lower longitudinal guide, the upper guide
being below the upper part of the chain, and the lower guide above the lower part of
the chain, the two guides being connected at or near their ends and secured to the
bottom stay by brackets or other suitable joints, and this guide frame is a fixture
upon the said bottom tube, or it may be made removable therefrom if desired.
The case or cover is capable of being separated into two parts, the latter being
held together by a hinge and screw or other suitable fastening, or by two screw or
other like fastenings. The case may be divided at or near one end so that one of
the ends may be removed or turned aside upon a hinge or it may be divided
centrally between the two chain wheels for example. The case according to my
invention is made with an aperture through same centrally, and when the end of
the case is turned away, or the case is taken apart centrally, the said case may be
slidden onto the guides hereinbefore described, and the end (when such is movable)
is placed in position and secured, or the two parts (when so made) are secured
together, and the case or cover is thus firmly and rapidly placed in position, and as
will now be understood, is as easily replaced.
The longitudinal guides are provided at the ends with plates which fit up to the
crank axle bracket and rear wheel hub and spindle and these plates may be made
removable. When the case or cover is slidden off the longitudinal guides the
driving chain is quite free and exposed.
Plates may be provided on the rear wheel axle, to cover the slot in the case and
provide for chain adjustment.
Doted this 01st L 1002
COMPLETE SPECIFICATION.
Improvements in or connected with Cases or Covers for the Chains
or Gear of Velocipedes.
I, HENRY BATE, of 11 Market Hill, Maldon, in the County of Essex, Cycle
Manufacturer, 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 :-
My invention relates to improvements in or connected with cases or covers for
the chains or gear of velocipedes, and the object of my invention is to so construct
such cases as to enable same to be removed from the velocipedes or to be replaced

page_text: employment of LODIS or skilled labour, and, it desired, without
the removal from the case of any part thereof.
I will describe my invention by reference to the accompanying drawing, on which
similar letters indicate like parts in the several figures.
Fig. 1 shews in side elevation a gear case constructed according to my invention,
and fixed in position upon the framework of a so called safety or rear-driving
bicycle.
Fig. 2 is a longitudinal section of the gear case removed from the bicycle, and
shewing the interior of the device.
Fig. 3 is a side elevation of the gear case removed from the central fixed part
of same, hereafter described, the said central part being shewn separately at
Fig. 4.
Fig. 5 is a left hand cross section of the gear case, taken on the line X Y of
Fig. 2 and drawn to a larger scale than the previous figures.
Figs. 6 shew in vertical longitudinal section and plan respectively, a device for
fastening the divided parts of the gear case together.
According to my invention I mount upon the bottom stay A, that is to say, upon
the tube that usually runs from the crank axle B to the rear bearing or axle B' a
frame composed of an upper and lower longitudinal guide C C₁ respectively, the
upper guide C being below the upper part of the chain, and the lower guide C¹
above the lower part of the chain, these two guides being connected at or near
their ends C C and secured to the bottom stay A by brackets E. I generally
employ brackets of a form such as is clearly shewn at Fig. 5, as I find these to
answer the purpose well, but other suitable brackets or fixing devices, such as are
well known, may be employed. One of the brackets E, as will be observed by
reference to Figs. 1 and 4, takes onto the tube in one direction, and the other in
the opposite direction, and it is by this means that the guide frame C C³ is securely
fixed upon the said bottom tube A, and in such manner that by unscrewing the
screws of the brackets E, the guide frame may be readily detached from the bottom
stay although of course it is obvious that should it be desired, the guide frame
may be brazed to the bottom stay A.
In order to place the frame C-C³ in the position described, upon the bottom
stay, I divide the guide frame, say at D, so that I am enabled to spring the frame
far enough apart at the division to pass over the stay A, after which the divided
part is connected by, for example, screw D', as shewn at Fig. 5.
Gear cases constructed according to my invention are made in what I may call
two main parts, the first of these being the guide frame already described, and this,
as is now understood, is formed on its horizontal upper and lower edges with
troughed guides, while what I term the second main part consists of a case which
slides within the said guides and forms a cover for the upper and lower surfaces of
the chain, and it is this case which I will now describe. This second part (case or
cover) is capable of being separated vertically and transversely into two parts,
either hinged together or fastened by screws or the like. In the drawings, the
case F is divided at the end by the crank shaft, and this end part F¹ is hinged to
its other part F by a hinge F, and when in the position shewn at Fig. 1, is secured
opposite to the hinge by a screw fastening G, shewn separately at Figs. 6. This
screw is not calculated to be removed, but on being partially unscrewed, the fork
part G' is released, and the end F may be turned upon its hinge into the position
shewn at Fig. 3. At the part where the rear axle B₁ passes through the sides of
the case, I provide plates M, capable of being moved in slides, and the apertures
through which the rear bearing axle passes are slotted, the object of such sliding
plates being to fit up against the rear axle and close the said apertures, while by
this arrangement I am enabled to slide the rear axle for adjusting the tension of the
chain, without removing or disarranging any part of the gear case, at the same
time preventing the entry of dust or dirt, which would otherwise take place were
the holes not so protected. When it is desired to inspect the chain, for example,
and to remove the gear case for this purpose, the screw or other fastening at G is

page_text: loosened, and the end F' turned upon its hinge into the position shewn at Fig. 3.
The case F may then be seized at its rear end, being slidden along the guides C C'
and removed, when the driving chain will be quite free and exposed. To replace
slidden
the case F, the front end of same is fitted into the guides of the parts C C³,
to place, and the end F¹ closed and secured.
Instead of the front end of the case being hinged, the front part may be made in
a piece with the part F, and the rear portion may be divided and hinged so that
the gear case F would be drawn off towards the front of the machine, or in some
cases I may divide the case F on, say, the line H H, Fig. 3, when the two parts
would be slidden onto the guides-C separately and united at the division by screws
or other means.
Instead of the hinge F2 and fastening G, the end part F1 may be fixed to the
part F by screws, although I prefer the hinge and fastening described.
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. A case or cover for the chain or gear of velocipedes, composed of a frame,
covering the inner part of the chain gear, mounted on the bottom stay tube and
having upper and lower longitudinal guides in combination with an outer case or
cover divided transversely, and adapted to take into and slide endwise upon such
fixed guides, to cover the outer parts of the gear, all substantially as and for the
purposes herein set forth.
2. In cases or covers for the chains or gear of velocipedes, the combination with
an outer case F having a divided and hinged end part, of a removable central
frame CC CC, divided for insertion over the tube A and provided with clips E
to fix to the said tube A, and the upper and lower parts C C being provided with
guides onto which the outer case F slides, the hinged end thereof being afterwards
closed and secured, all substantially as described and illustrated with reference to
the accompanying drawings.
3. The combination with a gear case or cover for velocipedes, composed of a
central guide part C-C³, detachably connected to the machine, and an outer
part F F adapted to slide end wise onto the part C-C' of slide pieces M to close
the slot in the case, through which the rear axle passes, substantially as set forth.
4. The general construction, arrangement, and combination of parts composing
my improved cases or covers for the chain or gear of velocipedes, all substantially
as and for the purposes herein described with reference to the accompanying
drawings.
Dated 2 day or
OCOL ann 0
BREWER & SON,
London and Leeds, Agents for Applicant.