Improvements in Operating Speed-indicators for Cycles, Oarriages, and other Vehicles.
Year: 1895

page_text: Date claimed for Patent under Sect. 103 of Act,
being date of first Foreign Application (in 10th Dec., 1894
France),
Date of Application (in United Kingdom), 20th Mar., 1895
Complete Specification Left, 20th Mar., 1895-Accepted, 18th May, 1895
Improvements in Operating Speed-indicators for Cycles, Oarriages,
and other Vehicles.
I, LOUIS PIERRE HENRY DE PLACE, of 32, Avenue Rapp, Paris, in the
Republic of France, Captain in the French Army, 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 :-
This invention relates to velocimeters or speed-indicators applicable for use with
cycles, carriages and the like, and consists in an improved method of and means
for actuating such apparatus; the object being to provide a simple medium for
communicating the movement of the wheel (the speed of which is to be ascertained)
to the mechanism of the speed-indicator.
The present invention is designed for operating speed-indicators which indicate
the speed of travel as distinguished from the distance travelled.
In operating a speed-indicator according to my invention, I employ a roller,
sphere or cylinder in contact with and actuated by the tyre of the wheel whereof
the speed is to be ascertained; such roller serving to transmit motion from the
vehicle wheel to the speed-indicating apparatus through the intervention of any
suitable mechanism. The roller may be adapted for use with vehicles of all kinds,
having tyres constructed of wood, metal, caoutchouc or india-rubber, whether solid
or hollow, or with inflated tyres.
The employment of a contact roller, sphere or cylinder actuated by the wheel
tyre with which it comes into contact at any suitable point either upon its rolling
surface or upon its cheeks, as herein before described, fully characterises my improved
method for transmitting motion to speed-indicating devices, whatever may be the
nature of their internal mechanism and their disposition on the vehicle; this method
securing the advantage of measuring the actual distance covered by the wheel in
travelling along the ground. By the employment of this method, I am enabled to
apply the speed-indicating instrument to wheels of any diameter. The contact
roller will travel the same distance as the tyre, its condition as regards rotation
being the same as if it were rolling on the ground.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, I claim :-
:―
1. The improved method of actuating velocimeters or speed-indicators, substan-
tially as herein described, consisting in transmitting the motion direct from the
wheel of the vehicle (whereof the speed of travel is to be ascertained) through the
medium of a roller, sphere or cylinder in frictional contact with the tyre or rim of
such wheel to the indicating apparatus.

page_text: 2. For actuating speed-indicators, the employment of a roller, sphere or cylinder
mounted in contact with the tyre or rim of the wheel of a vehicle (whereof the
speed of travel is to be ascertained) and connected in any suitable manner with
the mechanism of the speed-indicator.
Dand the 20th day of Mount 1905
2. For actuating speed-indicators, the employment of a roller, sphere or cylinder
mounted in contact with the tyre or rim of the wheel of a vehicle (whereof the
speed of travel is to be ascertained) and connected in any suitable manner with
the mechanism of the speed-indicator.
Dated the 20th day of March 1905
For the Applicant,