Improvements in the Change Gear used for the Propulsion of Motor Cars.
Year: 1899

page_text: Date of Application, 21st Oct., 1899
Complete Specification Left, 21st July, 1900-Accepted, 25th Aug., 1900
Improvements in the Change Gear used for the Propulsion of
Motor Cars.
I, ALFRED ROWE BELLAMY, of Fordsburg, Edgeley, Stockport, in the County
of Chester, Engineer, do hereby declare the nature of this invention to be as
follows:-
My said invention has reference to the change gear used for the propulsion
of motor cars.
The object of my invention is to provide a simple and effective means of
changing from one gear to another.
A
To effect this I provide the driving, or it might be the driven, shaft with a
key capable of sliding within a longitudinal recess formed in the shaft.
spring arranged beneath the key tends constantly to protrude the head of the key
beyond the periphery of the shaft.
One shaft has any required number of gear wheels fixed to it and another shaft
carries loosely mounted thereon a similar number of gear wheels as will be
understood.
Between, and at each end of the gear wheels is mounted on the shaft a loose
collar formed at each side with inclined surfaces, the head of the key being
also formed with corresponding inclines. The loose gear wheels can be pre-
vented from slipping endways on the shaft by suitable collars or fixings. To
operate the gear the key is preferably connected to a sleeve slid
on the shaft by means of a hand lever. To change the gear
the key is slid by means of the lever and attached sleeve until
the head comes into contact with the collar between the two gear wheels.
By means of the inclined surfaces formed on the head of the key and the collar,
the key head is depressed and slides beneath the collar out of the key way
in one gear wheel which then runs loose on the shaft,, and, the sliding move-
ment continuing, the key head slips into the key way of the neighbouring gear
wheel into which it is thrust by the spring below the key.
Each gear wheel may be formed with several key ways.
The sliding key may be thus rapidly changed from one gear wheel to another
or from one end of the series to the other even when the motor is running at a
high speed, so that there is no necessity for stopping or reducing the speed of
the motor. To throw the gear wheels out of gear the head of the key can be
left depressed below one of the collars arranged between the gear wheels. The
operating handle might be provided with an index to indicate the particular
gear wheels.

page_text: COMPLETE SPECIFICATION.
Improvements in the Change Gear used for the Propulsion of
Motor Cars.
I, ALFRED ROWE BELLAMY, of Fordsburg, Edgeley, Stockport, in the County
of Chester, Engineer, do hereby declare the nature of this invention and in
what manner the same is to be performed to be particularly described and ascer-
tained in and by the following statement and accompanying drawings.
My said invention has reference to the change gear used for the propulsion
of motor cars.
The object of my invention is to provide a simple and effective means of
changing from one gear to another.
The two sheets of drawings attached hereto clearly illustrate my invention.
Fig. 1 shows in sectional elevation a gear constructed in accordance with
my invention.
Fig. 2 is a similar view with the sliding key out of action.
In carrying my invention into effect I provide the driving, or it might be the
driven shaft a with a key b capable of sliding within a longitudinal recess c
formed in the shaft. A spring arranged beneath the key tends constantly to
protrude the head of the key beyond the periphery of the shaft.
The shafte has any required number of gear wheels f fixed upon it and the
other shaft a carries loosely mounted thereon a similar number of gear wheels g
as will be understood.
Between, and at each end of the gear wheels g is mounted on the shaft a, a loose
collar formed internally with rounded or inclined surfaces, the head 61 of the
key being also rounded or formed with inclines. The loose gear wheels g can
be prevented from slipping endways on the shaft by suitable collars or fixings
not shown in the drawings. To operate the gear the sliding key b is connected
to a sleeve i slid on the shaft by means of a hand lever j. The hand lever j
for operating the sliding key b is shown only by way of example as the method
of operating the sleeve i would be governed by the relative positions of the
gear and the driver of the motor.
To change the gear the key b is slid by means of the lever ; and attached
sleeve until the head comes into contact with the collar h between the two gear
wheels.
By means of the inclined or rounded surfaces formed on the head of the key
and the collar, the key head is depressed and slides beneath the collar out of
the keyway in one gear wheel which then runs loose on the shaft as shown in
Fig. 2, and, the sliding movement continuing, the key head slips into the key
way of the neighbouring gear wheel as shown in Fig. 1 into which it is thrust
by the spring à below the key.
Each gear wheel may be formed with several key ways.
The sliding key may be thus rapidly changed from one gear wheel to another
or from one end of the series to the other even when the motor is running
at a high speed, so that there is no necessity for stopping or reducing the
speed of the motor. To throw the gear wheels out of gear the head of the key
can be left depressed below one of the collars arranged between the gear
wheels (see Fig. 2). The operating handle might be provided with an index k
to indicate the particular gear wheels.
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:―
1) In change gear for the propulsion of motor vehicles the provision of a key,

page_text: and loose collars arranged between the loose gear wheels, the key being capable
of being slid beneath the loose collars from one gear wheel to another or main-
tained out of gear by means of the loose collars substantially as described and
shown.
2) The change gear for motor vehicles constructed arranged and acting sub-
stantially as described and illustrated.
Dated this 20th day of July 1900.
For the Applicant,
.
E. K. DUTTON & Co.,
Chartered Patent Agents,
5, John Dalton Street, Manchester, and 3, Yorkshire Street, Rochdale.