Year: 1894

page_text: I, PAUL HUNAEUS, Doctor of Philosophy, of Leinaustrasse, 9, Linden-Hanover,
in the German Empire, Celluloid Manufacturer, do hereby declare the nature of
this invention to be as follows:-
:―
My invention relates to gear cases for velocipedes.
Gear cases as hitherto generally constructed have had the disadvantage that
a considerable time has to be expended in connecting and disconnecting the parts.
Or where the parts have been made capable of being readily connected and
disconnected then, after they have been in use for a short time, rattling commences.
The object of my invention is to overcome these objections and to this end
instead of providing one part of the case with a groove around its edge to receive
the edge of the other part of the casing I provide a grooved block, forming an
intermediate piece, having a longitudinal opening through it so that it may embrace
and be fixed upon one of the stay-bars in such a manner that the said block is in
the same plane as that in which the chain runs, a clip or clips being provided on
the said block for firmly holding it to the stay-bar and preventing it from moving
thereon. This block is advantageously built up of two pieces of wood or other
material grooved on the faces which are designed to come into contact, in such a
manner that the two grooves form a hole of a size to receive the stay-bar, the said
two pieces being clamped together on the bar by screws or other suitable means.
The grooves into which the edges of the casing fit are advantageously formed by
rebating or fluting the edges of the block and attaching side plates of celluloid,
vulcanite or the like, the said plates being cut away to correspond with the hole
through the block. Those parts of the casing adjacent to the driving wheel and
pinion are connected in the usual manner, that is to say, the edge of one part is
formed with a groove adapted to receive the edge of the other part. The two
parts are securely held in their closed positions by a spring catch or the like at one
end and a pin or peg at the other end.
Instead of making the block of wood with plates of vulcanite or the like on the
sides as hereinbefore described to form the grooves therein, the said block may be
made of metal, in which case the grooves are formed in the metal itself.
By this arrangement it will be obvious that in taking the gear case apart for
cleaning or for any other purpose, it will not be necessary to detach the inter-
mediate piece or block, and that when the parts are in position a practically
dust-proof case is obtained.
חו. גינת
1004

page_text: improvements in Gear
po
I, PAUL HUNAEUS, Doctor of Philosophy, of Leinaustrasse, 9, Linden-Hanover,
in the German Empire, Celluloid 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 gear cases for velocipedes.
Gear cases as hitherto generally constructed have had the disadvantage that
a considerable time has to be expended in connecting and disconnecting the parts.
Or where the parts have been made capable of being readily connected and
disconnected, then, after they have been in use for a short time, rattling commences.
The object of my invention is to overcome these objections and to this end,
instead of providing one part of the case with a groove around its edge to receive
the edge of the other part of the casing, I provide a grooved block, forming an
intermediate piece, having a longitudinal opening through it so that it may embrace
and be fixed upon one of the stay-bars in such a manner that the said block is in
the same plane as that in which the chain runs, a clip or clips being provided on
the said block for firmly holding it to the stay-bar and preventing it from moving
thereon. This block is advantageously built up of two pieces of wood or other
material grooved on the faces which are designed to come into contact, in such a
manner that the two grooves form a hole of a size to receive the stay-bar, the said
two pieces being clamped together on the bar by screws or other suitable means.
The grooves into which the edges of the casing fit are advantageously formed by
rebating or fluting the edges of the block and attaching side-plates of celluloid,
vulcanite or the like, the said plates being cut away to correspond with the hole
through the block. Those parts of the casing adjacent to the driving wheel and
pinion are connected in the usual manner, that is to say, the edge of one part is
formed with a groove or rebate adapted to receive the edge of the other part. The
two parts are securely held in their closed positions by a spring-catch
at one end and a pin or peg at the other end.
or the like
Instead of making the block of wood with plates of vulcanite or the like on the
sides as hereinbefore described to form the grooves therein, the said block may be
made of metal, in which case the grooves are formed in the metal itself.
To enable my invention to be fully understood I will describe the same by
reference to the accompanying drawing, in which :-
Figure 1 is a side elevation of my improved gear case having my block made
of wood with vulcanite side-plates :
Figure 2 is an underside view of the upper part of the gear case with the block:
Figure 3 is a plan of the lower part of the gear case:
Figure 4 is a vertical section on the line 4-4 of Figure 1:
Figure 5 is a vertical section on the line 5-5 of Figure 1:
Figure 6 is a vertical section on the line 6-6 of Figure 1:
Figure 7 is a longitudinal section on the line 7-7 of Figure 5:
Figure 8 is a longitudinal section on the line 8-8 of Figure 6.
a is the upper and 6 the lower part of the gear case which is preferably made
of celluloid. The lower part 6 of the case is provided at its two ends with strips
or bands c, c of vulcanite, celluloid or other suitable substance, which strips forin
grooves or rebates into which the edge of the upper part enters when the case is
put together.
d is the catch attached to the spring e rivetted to the lower part of the case as
shewn. The catch d enters a hole or eye in the upper part a of the gear case and
is pressed inwards through the medium of the knob f when it is desired to release
the catch. g is the pin at the other end of the case, the said pin being attached

page_text: to a strip h rivetted to the lower part of the case and entering the hole or eye in
the upper part of the case. All the said parts are of ordinary construction.
i and are the two strips of wood forming my block, the said strips being provided
respectively with grooves j, j which pass obliquely along the same and form, when
the strips are screwed together by the screws k, k, an oblique hole of a size to
receive the stay-bar by means of which hole the said block can be fixed thereto.
1 is a strip of metal forming a clip on the stay-bar. m, m are the side plates of
celluloid, vulcanite or the like, screwed to the block the edges of which are rebated
for the purpose of forming grooves adapted to receive the cut-away edges of the
upper and lower parts of the gear case, as shewn in Figure 4.
By this arrangement it will be obvious that when it is desired to take the gear
case apart for cleaning or for any other purpose it will only be necessary to press the
knob and release the catch d to enable the upper part of the case to be removed
and then to remove the lower part from the block i, i which remains clamped on
the stay-bar.
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 combination with a gear case for velocipedes of a wooden or other block
formed in two pieces which are grooved on the faces designed to come into contact
with one another in such a manner that the two grooves form a hole of the size to
receive the stay-bar of the velocipede to which the said block is clamped, the
block also having grooves around its edges for the purpose of receiving the upper
and lower parts of the gear case substantially as, and for the purposes, described.
2. The manufacture and use of the improved gear case hereinbefore described
and illustrated in the accompanying drawing.
Dated this 17th day of August 1895
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.