Year: 1898

page_text: THOMAS GEERING and HARRY GEERING, Engineers, Rolvenden, Kent, do hereby
declare the nature of this invention to be as follows;-
Power is transmitted from motor crank shaft A to shaft B by a chain C which
is connected to a friction clutch 1), thereby the crank shaft A and shaft Bare
engaged and disengaged when required.
The counter shaft E is then driven from shaft B by cog wheels, the three cog
wheels FFF keyed tight to shaft B, the three corresponding cog wheels GG G
on shaft E are bound to a clutch H by two bolts II running through the cog
wheels G G G, by aid of one fork lever the three cog wheels G G G are moved
on shaft E, therefore three speeds or more can be actuated by one lever. The
cog wheels are so arranged that no more than two wheels can be engaged at
one time.
Compensating gear is produced by two differential drums J J, one each end of
shaft ; power is transmitted from sprocket wheels affixed to drums J J to road
wheels KK by two chains L L.
Backward gear is also produced by the three cog wheels M N O and clutch 1,
intermediate wheel N which runs loose on shaft Q, and clutch P. are thrown
into action by one lever: clutch P is thrown into clutch on drum J. and cog
wheel N is thrown into cog wheels M O which at once will reverse the gear.
THOMAS GEERING.
HARRY GEERING.
We, THOMAS GEERING, and HARRY GEERING, both of Rolvenden, Kent,
Engineers, 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 an improved variable speed and compensating gear
for motor vehicles.
The motor vehicle may be of any usual pattern.
In order to make our invention more clear, reference will be made to the draw-
ing filed with the Provisional Application, and to the additional drawing, illus-
trating a detail of the mechanism, filed herewith.

page_text: In these drawings;
That filed with the Provisional Specification shows a view from above of the
mechanism of a motor vehicle, the body of the car being supposed to be removed.
Figure 1 shows in side elevation the differential drum, the cover thereof being
removed,
Figure 2 shows a section of Figure 1.
Referring to these drawings it will be seen that the motive power is trans-
mitted from the motor crank shaft A to the intermediate shaft B, by means of
the chain C. The sprocket wheel on the shaft B over which the chuin C runs,
is connected to a friction clutch 1 working on the said shaft. The said shaft B
can be released from the motion of the crank shaft A whenever requisite and
can be immediately re-engaged therein when required. From the shaft B the
counter-shaft E is driven by means of gearing represented in diagram by the
wheels FFF on shaft B, and the wheels G G G on shaft E. The cog-wheels G
are secured to a clutch H by means of two bolts I I passing through the said
cog-wheels and by means of a forked lever the said wheels G are moved on the
shaft E into or out of gear as desired. By this device several different speeds
can be produced by actuating one lever.
The cog-wheels on the shaft E are so placed with regard to one another and
to the wheels Fon the shaft B, that only one wheel on each shaft respectively,
can be engaged at the same time. In the example shewn, there are consequently
three speeds obtainable from this device.
The compensating gear shewn in detail in Figures 2 and 3, is enclosed in the
drum J on the said shaft E. Said drum is surrounded by a sprocket wheel R
over which passes the chain L by means whereof motion is conveyed to the driv-
ing wheels K of the car.
This differential gear consists essentially of the triangular boss S secured upon
the shaft E by set-screws T or other convenient means. Pawls U are located
loosely in sockets at the angles of the said boss in the manner shewn and will
engage during the rotation of the shaft with the circular rack V attached to the
interior of the drum J, to which is attached the sprocket wheel R.
It will be seen that when this mechanism is caused to revolve the pawls or
catches fall into and out of engagement with the rack V on the drum J by
their own weight and that as long as the two wheels K are running on a straight
course they will both revolve at equal speed, but if it be required that one wheel
should move quicker than the other, as in turning a corner for instance, the
device described and shewn in Figure 2 will allow of the inside wheel on the
curve turning more slowly than the outside wheel, without straining or scraping
the tyres on the ground.
For reversing the motion of the car there is provided the intermediate wheel N
revolving loosely on the shaft Q. This wheel N is connected by a suitable lever
mechanism to a loose collar or the like on the clutch P. The clutch P is pro-
vided with another lever mechanism connected to a handle conveniently placed
near the driver's seat. These connections are not shewn in the drawings filed
with the Provisional Specification for the sake of clearness.
When the clutch P is pushed into gear with the drum J the connecting
device causes the intermediate wheel N to gear with the wheel M on the shaft B
and with the wheel O on the shaft E; the motion of the shaft B is thereby
reversed and the car moves backwards.
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 combination, in a motor car a driving shaft such as B with clutch
gear D, a counter-shaft E having triple wheels thereon such as G engaging with
corresponding wheels such as F on the shaft B. a lever controlled adjusting

page_text: device such as H having bolts I, adapted to impart forward motion to the car
and a reversing gear comprising the clutch P, the loose gear wheel N, the fixed
gear wheels M and 0, the differential compensating drum J secured to a sprocket
wheel and a chain or the like such as L transmitting motion to the road wheel K,
substantially as described.
2. The improved variable speed and compensating gear for motor vehicles
constructed and operating substantially as described with reference to the accom-
panying drawings.
W. P. THOMPSON & Co..
322, High Holborn, London, W.C., Patent Agents for the Applicant.