Improvements in and relating to the Manufacture of Gear Cases and Dress Guards for Cycles.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in and relating to the Manufacture of Gear Cases and
Dress Guards for Cycles.
:~
I, EDWIN PARSONS, of 143, Durham Road, Sparkbrook, near Birmingham,
Gentleman, do hereby declare the nature of this invention to be as follows:-
This invention relates to a method of manufacturing gear cases and dress
guards in aluminium, tin iron or other metal without need of soldering.
For gear cases I stamp or cut out the two sides which are divided horizontally
mid-way of their width and of suitable shape. By means of suitable dies and
stamps I form upon these sides the curved mouldings or beads upon the outer
edge of same, sufficient material being allowed so as to fold over and make a
flat butt join or other seam in order to unite the outer rims. The dies are so
shaped to mark creases in the said sides to allow for the folding over so as to
receive panels of celluloid or other material, also marking upon the sides the
openings for the hubs of the wheels and for folds or clips to allow of the upper
and lower parts of the gear case being closed one into the other, and also to
receive bar slides, and cap covers to box in the gearing, also to press out the
flanges to fit the bottom bracket.
The case is secured together by a fixed stud passing through an aperture in the
rim at one end and at the other by a screw passing through the said rim, and one
or more brackets to hold it in its place on the machine. The same arrangements
as above described may be followed out in making dress guards in two pieces
of aluminium or other metal with beaded edges.
EDWD. J. PAYNE & SON,
Warwick Chambers, 104, Colmore Row, Birmingham,
Patent Agents for the Applicant.
Improvements in and relating to the Manufacture of Gear Cases and
Dress Guards for Cycles.
I, EDWIN PARSONS, of 143, Durham Road, Sparkbrook, near Birmingham,
Gentleman, 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
Price 8d 1

page_text: and by the following statement reference being had to the accompanying draw
ings and to the figures and letters shewn thereon that is to say:
My invention relates to a method of manufacturing gear cases and dress guards
in aluminium, tin, iron or other suitable metal without any need of soldering
the parts together, as is usually the practice.
Figure 1, in the drawings represents in part side elevation a gear case con-
structed in accordance with my invention.
Figure 2, represents in side elevation the upper and lower halves.
Figures 3 and 4, are plan views of these parts.
Figure 5, represents a sectional detail to larger scale.
Figure 6, is a section on line A, B Fig. 1.
Figures 7 and 8, represent detail views shewing the folding and grooving.
In making a gear case I stamp or cut out by suitable dies and stamps four
pieces of metal riz., "the two vertical sides in pairs a, a, a, a, torming each
half of the gear case and which are divided horizontally mid-way of their width.
By the same operation and at the same time, I form upon these sides a, a, a, a,
curved mouldings or beads b, b, b, b, sufficient material being allowed so as to fold
over and back to form a hook like connection on each bead so that when the two
beads on each half are hooked into one another and what is termed jennied
together and closed up a flat butt join or other seam is formed and securely
unites the two parts, dispensing altogether with soldering or any other auxiliary
method, the two parts of the head when locked together and closed up as described
forming a tight join or seam. The dies are so shaped as to produce creases
beads or corrugations, c, e, in the sides of the gear case either for ornamentation
or to allow for the centres being cut out and the beaded edges being folded over
and back to form grooves or channels to receive panels of celluloid or other
material.
The horizontal grooves or channels, d, d, and flanges d', upon the meeting
edges of the gear case are also formed integral with the sides by providing
sufficient material to allow of the grooves or channels, d, d, being formed by
the press by folding over and back the metal the dotted lines in Figure 1, and
detail Figures 7, shew the interior line of the metal folded back to form said
grooves or channels.
The horizontal flanges of the meeting edges, e, e, of the lower half of the case
are also formed integral with same e¹, is a horizontal corrugation or bead pressed
out of each side and which abuts against the upper meeting edges of the case
to form a stop and give a good finish to the join when the two halves are
closed.
In a similar manner the openings for the axle of the chain wheel and rear
wheel axle and semi-circular recesses, f, f, f, f, are cut and stamped out of the
metal sides, also the openings and slots which receive the bar slides and cap
covers are cut out of the metal sides and folded over at the edges to form the
requisite grooves or channels for said slides and caps to fit over and box in
the gearing also the collar or flange for the bottom bracket is stamped from the
metal side.
The two halves upper and lower of the gear case are secured together by a
fixed stud or pin, G, upon the rear end of the gear case which passes through
and aperture, G, in the plate or lip, G2, upon the corresponding half and the
forward end of the case is fastened by a screw, H, passing through an aperture
in the extended piece or lip, H', or other fastenings may be employed.
The ordinary bracket arrangement or other suitable method may be used,
for the purpose of attaching the gear case to the machine.
By the aforesaid method of manufacturing gear cases or dress guards they
can be both quickley and cheaply produced and by forming the joins or scams
and grooved and flanged channels and recessed and cut out portions in the

page_text: manner described the various parts cut out of or stamped from the sides and
edges to give the necessary requirements are formed in one with the metal com-
posing the sides and all soldering brazing &c. of the parts is avoided and conse-
quently the gear case is stronger than where the various parts have to be soldered
or in like manner attached, I may add that all the parts usually soldered or
brazed on to the case are by my improved construction stamped out of the metal
integral with the gear case which is a great advantage.
Furthermore difficulty has existed in making gear cases of aluminium by
reason of the metal not admitting of successfully soldering.
Having now particularly described the nature of my said invention and in
what manner the same is to be performed, I declare that what I claim is:―
First. In a gear case for cycles forming the sides and edges of same by stamping
out the said sides with mouldings or beads upon the edges of the corresponding
sides of the gear case by means of stamps or presses and dies in such a manner
that said beads or mouldings are folded over and back to form hook like con-
nections engaging one another to connect said sides of the gear case and to
form the join or seam without soldering or the like substantially as described
and shewn.
Second. Stamping out the sides of a gear case in such a manner that the hori-
zontal grooves and channels and flanged meeting edges upon each half are
formed without soldering forming said channels by stamping creases or corruga-
tions to allow for folding the metal edges over and back to provide said grooves
and channels as set forth and described.
Third. In a gear case stamping out the semi-circular recesses in the sides of
the case for chain wheel axle and forming the edges of the aperture which receives
the slides and covers to box in the gearing by stamping and folding the metal
out of the sides of the said case and in one with same substantially as described.
Fourth. A gear case of aluminium tin, iron or other metal substantially as
described with reference to the accompanying drawings.
Fifth. As a new article of manufacture constructing a gear case of aluminium
or other metal without any soldering of the parts as for the purpose herein
described.
Dated this 12th day of September 1898.
EDWD. J. PAYNE & SON,
Warwick Chambers, 104, Colmore Row, Birmingham,
Patent Agents for the Applicant.