Improvements in or connected with Detachable Gear Cases for Velocipedes.
Year: 1897

page_text: Date of Application, 3rd Apr., 1897
Complete Specification Left. 1st Jan., 1898-Accepted, 5th Mar., 1898
Date of Application, 3rd Apr., 1897
Complete Specification Left. 1st Jan., 1898-Accepted, 5th Mar., 1898
PROVISIONAL SPECIFICATION.
Improvements in or connected with Detachable Gear Cases for
Velocipedes.
We, FRANK HENRY BLUEMEL, CHARLES WILLIAM BLUEMEL, and ERNEST
ADOLPHUS BLUEMEL, trading as C. W. Bluemel & Bros., of Crown Works, Globe
Road, London, E., Manufacturers, do hereby declare the nature of this invention
to be as follows:-
-
Our invention relates to improvements in or connected with gear cases for velo-
cipedes, the object being to provide means whereby such cases may be more easily
and securely fixed in position, while the removal of same or of a part of same so
as to allow of ready access being had to the chain and chain wheels, is greatly
facilitated by the improved form of construction of the parts.
These improvements refer more particularly to gear cases of the construction or
form described in the specification of our former Letters Patent No. 18566 A.D. '95,
and in carrying same into practical effect we provide a suitably bent plate of suffi-
cient size to fit across and be contained within the gear case at or about the centre
of same, a second and smaller curved plate being provided designed to be secured
to the first mentioned plate by means of screws or the like in such a manner as
to secure or clamp them both to one of the side stays of the machine. The
edges of the first mentioned plate are bent over at right angles and rest against
the edges of the back of the gear case so that when the front of the said gear
case is placed in position, small screws, studs or the like may be passed through
holes or perforations formed in the edges of the said front and back, for the purpose
of securing the case at this part firmly in position.
In order to secure the front end of the gear case, the back of same at this
part is provided with a vertical plate fitting at each end into a metal pocket rivetted
or secured in any suitable manner one to the upper and one to the lower part of
the said back. This plate is furnished with a vertical slot or opening, while a clamp
is designed to embrace that tube of a velocipede extending from the head of the
machine to the bottom bracket of same. This clamp is provided with a projecting
screw-threaded arm designed to pass through the aforesaid slot or opening herein-
before referred to, and to be secured in the required position to the plate carried
by the pockets aforesaid by means of small nuts.
In order that ready access may be had to the front driving or chain wheel, the
front of case is formed with a circular opening of considerably larger size than
that usually provided, said opening being covered by means of a circular disc fur-
nished with a central hole or perforation through which passes the driving axle
of the machine.
In order to secure this covering disc in position the top and bottom portion of
this opening is furnished with a suitable number of raised studs close to the edge
of same, the covering disc being furnished with a corresponding number of holes

page_text: or perforations, so as to fit over same, the covering disc being then secured in posi-
tion by two small curved or circumferential plates of metal or other suitable
material, one for each set of studs. These plates are furnished with a series of
holes or perforations corresponding to the studs, each opening or perforation being
formed with a rearwardly extending slot of such a size as to embrace or take the
stem of the stud but small enough to prevent the head of the stud passing through
same.
These plates are passed over the stud heads and pushed round for a sufficient dis-
tance so as to bring the stud heads over the rearwardly projecting slots or exten-
sions, the plates being retained in this position by the end of each plate, which
is furnished with a small hole or perforation passing and snapping over a small
raised pin or projection.
By our improvements the gear case can be quickly and easily removed without
the clamps or securing devices being removed from the frame of the velocipede,
the central supporting device or plate being left secured to the bottom stay of the
machine when the aforesaid screw studs are removed, while the end supporting
plate readily slips from the pockets within which it is contained when required
and remains secured to the aforesaid projecting screw threaded arm of the clamp.
As our improvements are capable of some modifications, without departing from
the principle thereof, we do not restrict ourselves to materials, dimensions, or to the
precise form or placement of the several parts thereof.
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F. G. CASSELL,
(Of Cassell & Co.,)
22, Glasshouse Street, Regent Street, London, W.,
Agent for the Applicants.
Improvements in or connected with Detachable Gear Cases for
Velocipedes.
We, FRANK HENRY BLUEMEL, CHARLES WILLIAM BLUEMEL, and ERNEST 3
ADOLPHUS BLUEMEL, trading as C. W. Bluemel & Bros., of Crown Works, Globe
Road, London, E., Manufacturers, 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:-
Our invention relates to improvements in or connected with gear cases for velo- 3
cipedes, the object being to provide means whereby such cases may be more easily
and securely fixed in position, while the removal of same or of a part of same
so as to allow of ready access being had to the chain and chain wheels, is greatly
facilitated by the improved form of construction of the parts.
These improvements refer more particularly to gear cases of the construction or 4
forin described in the specification of our former Letters Patent No. 18566 A.D). 1895,
and in carrying same into practical effect we provide a suitably bent plate suffi-
cient size to fit across and be contained within the gear case at or about the centre
of same, a second and smaller curved plate being provided designed to be secured
to the first mentioned plate by means of screws or the like in such a manner as
to secure or clamp them both to one of the side stays of the machine. The
edges of the first mentioned plate are bent over at right angles and rest against
the edges of the back of the gear case, so that when the front of the said gear

page_text: case is placed in position, small screws, studs or the like may be passed through
holes or perforations formed in the edges of the said front and back, for the purpose
of securing the case at this part firmly in position.
In order to secure the front end of the gear case, the back of same at this
part is provided with a vertical plate fitting at each end into a metal pocket rivetted
or secured in any suitable manner one to the upper and one to the lower part of
the said back. This plate is furnished with a vertical slot or opening, while a clamp
is designed to embrace that tube of a velocipede extending from the head of the
machine to the bottom bracket of same. This clamp is provided with a projecting
screw-threaded arm designed to pass through the aforesaid slot or opening herein-
before referred to, and to be secured in the required position to the plate carried
by the pockets aforesaid by means of small nuts.
In order that ready access may be had to the front driving or chain wheel, the
front of case is formed with a circular opening of considerably larger size than
that usually provided, said opening being covered by means of a circular disc fur-
nished with a central hole or perforation through which passes the driving axle
of the machine.
In order to secure this covering disc in position the top and bottom portion of
this opening is furnished with a suitable number of raised studs close to the edge
of same, the covering disc being furnished with a corresponding number of holes
or perforations, so as to fit over same, the covering disc being then secured in posi-
tion by two small curved or circumferential plates of metal or other suitable
material, one for each set of studs. These plates are furnished with a series of
holes or perforations corresponding to the studs, each opening or perforation being
formed with a rearwardly extending slot of such a size as to embrace or take the
stem of the stud but small enough to prevent the head of the stud passing through
same.
These plates are passed over the stud heads and pushed round for a sufficient dis-
tance so as to bring the stud heads over the rearwardly projecting slots or exten-
sions, the plates being retained in this position by the end of each plate, which
is furnished with a small hole or perforation passing and snapping over a small
raised pin or projection.
In order that our invention may be more fully understood, we will now proceed
to describe same with reference to the accompanying drawings in which Fig. 1 is
a front elevation of the gear case, Fig. 2 being an elevation of the back part of
the gear case.
Fig. 3 shows the inside bent plate for securing the gear case in position in front
and side elevation.
Fig. 4 is a side elevation of the outside vertical plate employed for a like
purpose.
Fig. 5 is a full sized view of one of the curved or circumferential plates, and
Fig. 6 a similar view of the covering disc. Fig. 7 is a plan of the clamp used in
connection with the plate shown in Fig. 4.
According to our improvements we provide firstly a suitably bent plate a
(Fig. 3) of sufficient size to fit across and be contained within the gear case at or
about the centre of same, the outwardly bent portions of the said plate resting
within the pressed out parts a² (Fig. 2) of the back of same, while a second and
smaller curved plate is provided designed to be secured to the plate a by means
of screws in such a manner that both plates may be securely clamped to one of
the side stays of the machine. The edges d are bent at right angles as shown
and rest against the top and bottom edges or flanges of the back B of the gear
case (Fig. 2) so that when the front A of the said gear case is placed in position,
the whole may be firmly secured together by means of small screws or screw
studs e which pass through holes or perforations in the flanges of the front and
back of the gear case and enter screw threaded holes or perforations in the bent
over ends of the plate a, and by this means the gear case is at this part firmly
secured to the frame of the velocipede.
'

page_text: In order to secure firmly the front end of the gear case in position, the back of
same is furnished at this part with two pockets f which are secured one to the
top part B and one to the lower part B of the back of the gear case, and into which
the ends of the bent plate g (Figs. 2 and 4) enter. The plate g is furnished with
a vertical slot or opening h, while the extending arm i of the clamp j (Fig. 7) passes
through the aforesaid slot or opening where it is secured in the required position
by means of small nuts, the said clamp j being designed to embrace that tube of
the velocipede frame which extends from the head to the bottom bracket, and by
this means the gear case is now secured at or about its centre and also at the fron
end to the frame of the velocipede.
To allow of ready access being had to the front driving or chain wheel, the
front A of the case is furnished with a circular opening of considerably larger size
than that usually provided, said opening being covered by a circular disc k fur
nished with a central hole or perforation through which the driving axle of the
machine passes, the disc & being split or divided at any point such as k¹ to allow of
its being readily passed over the said driving axle.
In order to secure this covering disc in position a suitable number of raised
studs m are arranged around the edge of the opening formed in the front of the
gear case, the covering disc being divided with a corresponding number of holes
or perforations n so as to fit over same. The covering disc is then secured in
position by two curved or circumferential plates o, (Figs. 1 and 5), one for each
set of studs, these plates being furnished with a series of holes or perforations P
corresponding to the studs m, each hole or perforation p being formed with a rear-
wardly extending slot 9
of such a size as to embrace or take the stem of the stud m
but small enough to prevent the head of the stud passing through same.
The plates o are passed over the heads of the studs m and pushed round a suffi-
cient distance so as to bring the stud heads over the rearwardly extending slots q
the plates being retained in this position by the end of each plate, which is furnished
with a small hole or perforation passing and snapping over a small raised
pin or projection s. In Fig. 1 the upper plate o is shown in the closed or locked
position, while the lower plate is shown in the open position ready for removal.
By these improvements the gear case can be quickly and easily taken off the
machine without the clamps or securing devices being removed from the frame of
the velocipede, the central supporting device (Fig. 3) being left secured to the bottom
stay of the machine when the aforesaid screw studs e are removed while the plate,
(Figs. 2 and 4) readily slips from the pockets f when the upper and lower parts B, B,
are separated, and remains secured to the projecting screw threaded arm i of the
clamp j.
The gear case is further provided with suitable slides, covering strips etc. such
as hitherto employed and which are well known, and no claim is therefore made
for same.
Having now particularly described and ascertained the nature of our said in-
vention, and in what manner the same is to be performed, we declare that what
we claim is:
1. In a gear case having a front detachable from the back and designed to clip
over same after the manner of a lid, and having the back divided into two parts,
the improved means for securing the gear case in position, comprising the general
combination and arrangement of the plates a, b, and screw studs or the like e, and
the curved plate g taking into pockets such as f with a suitable connecting clamp j
furnished with a projecting arm i, substantially as, herein described and shown
and for the purposes specified.
2/. In a gear case furnished with an enlarged opening at the front end and having
a covering disc such as k; the method of securing same in position by means of
curved or circumferential plates such as furnished with holes or perforations p
having rearwardly extending slots g, in combination with projecting studs m, the

page_text: whole arranged and operated substantially as herein described and shown, and for
the purposes specified.
Deted this 21st day of December 1897.
F. G. CASSELL,
(Of Cassell & Co.,)
22, Glasshouse Street, Regent Street, London, W.
Agent for the Applicants.