Improvements in and relating to Gear Cases for Cycles and in the Means for Attaching the same.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in and relating to Gear Cases for Cycles and in the
Means for Attaching the same.
I, SAMUEL GEORGE PRICE, of 139, Tennant Street, Birmingham, Tin Plate
Worker, do hereby declare the nature of this invention to be as follows:-
This invention relates in the first place to an improved method of constructing
the gear case and in the second place to the method of attaching the said gear
case to the machine so that it can be readily attached and detached.
The case is divided horizontally and hinged at its fore end so that the upper
and lower halves close down the one on to the other and engage each other at
the meeting edges. At the edges preferably of the upper half I suitably attach by
soldering brazing or otherwise a moulding upon each side which serves a two-
fold purpose namely to strengthen the case at that part and to form longitudinal
channels or grooves to receive the edges of the sides of the lower half of the case.
The moulding is formed on each side by folding over the metal strip from one
piece so as to obtain the groove or channel the lower edge being below said groove
which thus forms a guide for the meeting edge of the lower half of the case when
closing same.
Sometimes the moulding is attached to the lower half to receive the meeting
edges of the upper half. In order to further strengthen the sides of the case I suit-
ably attach to the interior by brazing soldering or otherwise longitudinal strips at
or near to the meeting edges which strips are of a corrugated section or a shallow V
section with the top edges turned over at right angles to the depth of the point
of the V so that the said strip possesses three points of bearing thus affording
strength with lightness.
At the back end of the case upon the one side and made integral with the same
is a curved out projecting portion that fits over the back end of the stay instead
of using a slide as hitherto at this part, a stamped lap over moulding is upon
the meeting edges upon either side of this projecting portion. Upon the driving
chain wheel end of the case on the other side is a similar curved out projecting
portion to fit over the stay thus boxing the gearing and stay well in this pro-
jecting portion may be made in one piece with the portion that carries a slide
at this part.
The main object that I have in view is the construction of a compact and
strong gear case having practically no loose adjusting parts: whilst the case is
perfectly dustproof. Two slides or clips adjustably attached secure the rear end
of the case together. Referring to the improved method of attaching the gear
case to the machine it consists of a looped bracket piece which is attached to the
member of the cycle frame by a screw or other device the end of this bracket is
then connected to an adjustable spring arrangement forming two spring arms or
aws which are turned at right angles towards one another at their extremities
and are made to expand or contract by the manipulation of a central vertical
crew with milled head or nut. This screw passes down between the said jaws

page_text: through the end of the bracket arm and crown of the jaws the extremity of the
screw working onto a horizontal cross bar and secured to same, the two arms or
jaws have vertical slots therein the cross bar fitting through same and being
kept in position by a flanged head at each end. Preferably the vertical screw will
have a detachable milled head or nut said screw being wormed with a right and
left hand screw, to receive the milled head or nut. The inturned ends of the
two spring jaws engage a staple or flat loop upon the case and the action is
thus. The two spring jaws being open and the screw raised the inturned ends
of the jaws are placed one on each side of the staple or loop then by screwing
down the vertical screw the cross bar working in the slots is depressed the
shouldered heads bearing against the spring jaws the sides of which are widened
out at this point the result is that the jaws are drawn in and consequently firmly
grip the attachment staple.
By reversing the milled head or thumb screw the grip is relaxed and the case
can be removed from the machine. If preferred I may sometimes use a coil
spring in place of the screw a similar effect can be obtained.
EDWD. J. PAYNE & SON,
Warwick Chambers, 104, Colmore Row, Birmingham,
Patent Agents for the Applicant.
Improvements in and relating to Gear Cases for Cycles and in the
Means for Attaching the same.
I, SAMUEL GEORGE PRICE, of 139, Tennant Street, Birmingham, Tin Plate
Worker, 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, reference being had to the drawings accompanying this
specification and to the figures and letters shewn thereon.
My invention relates in the first place to an improved method of constructing
gear cases and in the second place to the method of attaching the same to cycles,
whereby they are readily attached and detached.
Figure 1. Represents a side elevation of my improved gear case.
Figure 2. Represents an open view of same.
Figure
3. Represents to a larger scale a vertical cross section at A, B.
Figure 4. Represents in part elevation the rear end of the case with the slides
removed.
Figure 5. Represents the other side of the rear end.
Figure 6. Sheet 2. Represents an open view of the opposite side of Figures 1
& 2.
Figures 7 & 8 are interior views of the lower halves of the case.
Figure 9. Represents a detail of a strengthening rib.
The case according to my arrangement is divided horizontally and hinged at
its fore end at A so that the upper and lower halves B, B' close the one on to
the other and engage each other at the meeting edges.
At the edges preferably of the upper half I suitably attach by soldering,
brazing, or otherwise a moulding C, upon each side which serves a two fold
purpose, namely to strengthen the case at that part but chiefly to provide longi-
tud nel channels or grooves to receive the edges (2, 0, of the corresponding
sides of the lower half of the case.

page_text: The moulding C, C₁ is formed on each side of the upper half of the case by
folding over a metal strip and suitably attaching same to the sides as stated so
as to provide the groove or channel C4 C5, the inner edge of this groove or channel
is continued lower than the channel itself on each side of the upper half so as to
provide longitudinal flanges C which form guides for the meeting edges of the
Tower half of the case when closing same. There are also provided flanges C7, C8
at each side of the extreme forward end.
Sometimes I may reverse the above arrangements, that is to say the channelled
or grooved moulding may be upon the lower half of the case to receive the meet-
ing edges of the upper half. In order to strengthen the sides of the case I suit-
ably attach to the interior portion of the two sides, preferably of the lower half
by brazing, soldering or otherwise, longitudinal strips D at or near to the meeting
edges C, C, these strips are of a corrugated section or of a shallow V section having
the side edges turned down at right angles D1, D2, to the depth of the point of
the V so that the said strip D) possesses three points of bearing on the sides of
the case, thus affording strength with lightness.
At the rear end of the case upon the one side and made integral with same is
a semi-circular projecting portion E that fits over and encloses the back end of
the stay, and instead of using a slide or some such arrangement at this part as
hitherto, I provide a stamped lapover moulding F, F¹, upon each side at the end
of and integral with the part E which receives a slide Fa.
Upon the driving chain wheel end or front end of the case on the other side
is a similar semi-circular projecting portion which is suitably cut out and
formed to fit over or around the stay at that end, thus boxing the gearing and
stay well in.
By constructing a gear case in the manner as above described it will be observed
that a very simple arrangement is provided as the main object that I have in
view is the construction of a compact and strong gear case with as few parts as
possible, so that the case has practically no loose adjusting parts with the exception
of certain necessary slides or clips G, G¹ for securing the rear end of the case
together.
This description of case according to my invention is perfectly weather and
dust proof.
Referring to the improved method of attachment, I find that the arrangement
shewn will best answer my purpose.
Figure 10. Represents a side view.
Figure 11. Represents a back view and
Figure 12. A side view shewing clip open, whilst in
Figure 13. Is seen a modification.
It consists of a looped bracket piece H for attachment to the member of the
cycle frame by a screw or other device, the end of this bracket H is in connection
with an adjustable spring arrangement forming two spring arms or jaws H², H2
which are turned at right angles towards one another at their extremities and
are made to expand by pressure upon the side H2 which is jointed at H3 as shewn.
A suitable coiled or other spring governs the opening and closing of these
jaws H1, H2, the part H¹ may be rigid with the bracket piece H or suitably jointed
so as to fall back when pressure is applied to the part H2. The modification in
Figure 13 consists of the bracket piece H being attached to the clip in the
centre so that upon pressing the two arms or jaws H1, H2, they will open, and
upon being released close together, governed by a spring as previously referred
to. The looped bracket piece H is attached to the member of the cycle frame
and secured by a screw or other device the inturned ends of the two spring arms
or jaws H1, H3, engage a staple or flat loop J upon the case. Figure 6.
It will be understood that two of these attachments may be employed to attach
the case to the machine at the upper and lower parts of the case. It will be clear
that the two spring jaws H, H₁, being open as in Figure 12 and dotted lines
Figure 13 the inturned ends of the jaws are placed one on each side of the flat

page_text: staple or loop J and pressure relaxed, the jaws thus obtain a very firm grip in
the loop Jon each part of the case, and securely attach the gear case to the
machine. As shewn in Figures 14 & 15 I may sometimes employ a screw arrange
ment for expanding and contracting the spring arms or jaws by the manipulation
of a central screw (a) having a milled head or nut (b) this screw passes throug
the end of the looped bracket arm (c) and crown (d) of the jaws (d) and between the
said jaws the extremity of the screw working on to a cross bar (e) and secured
to same, the two arms or jaws (d') are provided with slots (d2) the cross bar (e)
fitting therein and being kept in position by a flanged head (e¹) at each end
The vertical screw (a) may have the milled head or nut (b) made detachable,
said screw being wormed with a right and left hand screw to receive the milled
head or nut.
The two spring jaws (d) are closed together by screwing the vertical central
screw (a) the cross bar (a) working in the slots (d) is depressed the shouldered
heads (e) bearing against the spring jaws (d) the sides of which are widened
out at this point, the result is that the jaws are drawn in and consequently firmly
grip the attachment staple or loop on the case.
By reversing the milled head or thumb screw the grip is released and the case
can be removed from the machine.
'
I may vary the details of arrangement herein described without departing from
the general principle employed but
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is
:
-
'
Firstly In chain gear cases for cycles the construction and arrangement and
particular formation of the sectional halves of the gear case and the method of
joining together said halves by means of flanged longitudinal grooves or channels
formed in moulding of one or more pieces upon the one half and having a deep
flange on each side made to receive the meeting edges, of the other half all in
combination substantially as described and shewn.
Secondly. In gear cases for cycles, the raised or semi-circular projecting part E
constructed to receive a slide F, the overlapped mould F, F being integrally
a part of E, the raised projecting part E¹ all in combination with a gear case
substantially as described and shewn.
Thirdly. In gear cases the employment of strengthening pieces in combination
upon the interior sides of the case as described and illustrated in Figures 7 & 8
& 9 of the drawings.
Fourthly. In connection with gear cases and in combination therewith the
means for attaching gear cases to cycles described and illustrated with regard
to Figures 10 to 13 of the accompanying drawings.
Fifthly. In connection with gear cases and in combination the means of attach-
ment described and illustrated in Figures 14 and 15 of the accompanying
drawings.
Sixthly. A gear case for cycles and means for attaching the same constructed
and arranged all in combination substantially as described.
Dated this 9th day of December 1898.
EDWD. J. PAYNE & SON,
Warwick Chambers, 104, Colmore Row, Birmingham,
Patent Agents for the Applicant.