Improved Gear for Front Driving Bicycles and (so called) Geared Ordinarys.
Year: 1892

page_text: Date of Application, 17th Oct, 1892
Complete Specification Left, 26th Jan., 1893-Accepted, 11th Mar., 1893
PROVISIONAL SPECIFICATION.
Improved Gear for Front Driving Bicycles and (so called) Geared
Ordinarys.
THOMAS COPPOCK Junior, Painting Brush Importer, 448, Stockport Road,
Longsight, Manchester, England, do hereby declare the nature of this invention to
be as follows:-
(1) I employ on the crank spindle a toothed wheel, the teeth being on the rim
part, this wheel is immovably fixed to the crank spindle.
(2) For one of the hub sides, I have a circular piece of metal or wheel, teeth
being on the face of it.
(3) Above the immovable wheel on crank spindle, I employ a slanting wheel,
which has teeth on the rim part and teeth on the body part, when this latter wheel
is in position, the teeth on the body part of it, fit into the teeth of the immovable
wheel on the crank spindle; and the teeth on the rim part of mentioned slanting
wheel, at the same time fit into the teeth on the circular piece of metal or wheel
of bub side.
(4) The slanting wheel is fixed on a stationary rod or spindle and so fixed that
it will turn either backwards or forwards easily, ball bearings being applied.
(5) The stationary rod or spindle curves like the figure two, one end acting as
stationary spindle for the slanting wheel, the other end acting as stationary spindle
for one side of the hub, this latter end is immovably fixed to one of the fork sides
of the frame; the crank spindle runs through this stationary spindle.
(6) As previously stated; one side of the hub is a circular piece of metal or
wheel; for the other side, another circular piece of metal or wheel, but without
teeth.
(7) To keep both sides of the hub together and in position, I employ narrow
strips of metal, which meet lengthways, and are immovably fixed to each side and
so constitute a sort of open hub or case: this may again be completely covered, by
a band of suitable material or metal; enough space is left at each side of the hub,
for the spokes to be fixed in the usual ways.
(8) Ball bearings may be applied on the side of (hub without teeth) so; between
the immovable spindle and the crank spindle, also between the hub and the
immovable spindle.
(9) In action the cranks turn the crank spindle, and with it, the immovably fixed
wheel on the crank spindle; this latter wheel, having teeth on the rim part, works
into the teeth on the body part of the slanting wheel and revolves it; the slanting
wheel then being in motion and having teeth also on the rim part, works into the
teeth of the circular piece of metal or wheel and revolves this also, this latter being
part of the hub; as it revolves, the complete wheel revolves.
(10) The toothed side of hub revolves in the usual way, that is, on the crank
spindle, but the other side revolves on the stationary spindle.
Dated this Fifteenth day of October 1892.

page_text: COMPLETE SPECIFICATION.
Improved Gear for Front Driving Bicycles and (so called) Geared
Ordinarys.
I, THOMAS COPPOCK, Junior, of 448, Stockport Road, Longsight, Manchester,
in the County of Lancaster, Artist's Brush Importer, do hereby declare the nature
of this invention and in what manner the same is to be performed, to be particu-
larly described and ascertained in and by the following statement :-
This invention has for its object to provide bicycles with a front driving gear
for the increase of speed which is not liable to bind or otherwise get out of order,
will stand any required strain and require less power to drive and be neater in
appearance than such as heretofore have been in use.
And in order that my invention may be more fully understood I have caused to
be appended hereunto one sheet of drawings marked with letters of reference
indicating like parts in the various figures.
Fig. 1 is a longitudinal section of my improved driving gear.
Figs. 2 & 4 are side views and Fig 3 also a longitudinal section of various
modifications of the same.
a and
In carrying out my invention and referring to Fig. 1, I employ on the crank
spindle a a toothed or bevel wheel b, the teeth being on the rim part, which
wheel is keyed or otherwise immovably fixed to the crank spindle a. For
one of the hub sides I have a circular piece of metal or wheel chaving teeth
or a bevel wheel d suitably formed or fixed on the face thereof. Above the
immovable wheel on the crank spindle a, I employ a slanting bevel wheel e
which has teeth e' on the rim part and also teeth e² on the body part. When
this wheel e is in position, the teeth on the body part thereof are in gear
with the teeth of the immovable wheel b fixed on the crank spindle
the teeth e¹ on the rim part are at the same time in gear with the toothed or bevel
wheel d. The slanting wheel e is mounted on a stationary rod or spindle fand
may turn thereon either backwards or forwards easily, ball bearings g being applied.
The stationary rod or spindle curves like the figure two, one end f' acting as
stationary spindle for the slanting wheel e and the other end 2 as stationary spindle
for one side of the hub. This latter end is immovably fixed or formed on one of
the fork sides a¹ of the frame, the crank spindle a running through this stationary
spindle part. As previously stated one side of the hub is a circular piece of metal
or wheel c, for the other side another circular piece of metal or wheel c', but
without teeth, is employed. To keep both sides of the hub together and in position
I employ narrow strips of metal h which meet lengthwise and are immovably fixed
to the sides c e and so constitute a sort of open hub or case which may be com-
pletely covered by a band of suitable material such as enamelled leather with
buckles and straps or of metal i, enough space being left at each side of the hub for
the spokes k to be fixed in the usual way. Ball bearings g may be applied on the
side of the hub without teeth, also between the immovable rod or spindle and the
crank spindle a and hub respectively.
In lieu of employing the slanting bevel wheel e on a rod or spindle f,f,f2 of the
shape as shown in Fig. 1, the same may be employed on an inclined shed f¹ formed
on an axial extension of the rod or spindle end 2 as shown in Fig 2, the stud./1
having a shoulder on which the slanting bevel wheel e revolves.
Instead of employing the bevel wheel e in a slanting position, it may be mounted
horizontally as shown in Fig. 3, an axial extension being also formed on the
fork side a which has a vertical stud f with a shoulder on which the bevel wheel e
revolves.
Fig 4 shows, how a horizontal stud f¹ formed on an axial extension of or on the
rod or spindle end may be used for existing kinds of front driving gears of
bicycles.

page_text: The action of the gear is as follows:-
The cranks turn the crank spindle a and with it the bevel wheel 6 fixed on to
the crank spindle a. This latter wheel having teeth on the rim part, works into
the teeth on the body part of the slanting wheel e and revolves it, the slanting
wheel e then being in motion and having also teeth e¹ on the rim part, works into
the teeth or wheel d, which latter being part of the circular piece of metal or
wheel c revolves the hub and thus the complete wheel. The toothed side of the
hub c revolves in the usual way, that is, on the crank spindle a or it may be
arranged to revolve on a boss formed on the respective fork side a¹ similar as the
other side c¹ revolves on the stationery spindle end f³.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim, is-
"In gears for front driving bicycles and (so called) geared ordinarys."
1st. The general construction and combination of parts constituting my improve-
ments operating substantially as and for the purpose set forth.
2nd. The stationary rod or spindle ff, f, with or without axial extension f³, the
end of which is adapted to receive one of the hub sides and the end one or
more toothed wheels employed to transmit rotary motion through other wheels to
the hub of the bicycle wheel, substantially as and for the purpose set forth.
3rd. The bevel wheel e suitably mounted on a stationary rod or spindle f, f, f²₂
with or without axial extension f³ formed on or fixed to one of the fork sides a' and
having two circles of teeth e' & e² in combination with two bevel wheels d & b, the
bevel wheel being fastened onto the crank spindle a and gearing into the circle
of teeth e² and the bevel wheel d forming part of or being secured to the hub side c
and gearing into the circle of teeth e' of the bevel wheel e, substantially as and
for the purpose set forth.
Dated the 25th day of January 1902
F. BOSSHARDT & Co.,
4, Corporation Street, Manchester, Agents to Applicant.