Improvements in Frames for Cycles and other Vehicles.
Year: 1891

page_text: Date of Application, 3rd June, 1891
Complete Specification Left, 6th July, 1891-Accepted. 22nd Aug. 1891
PROVISIONAL SPECIFICATION.
Improvements in Frames for Cycles and other Vehicles.
JOHN ANDERSON 38 Elswick Row Newcastle-on-Tyne Engineer do hereby
declare the nature of this invention to be as follows
:-
This invention consists in the frames of cycles and other light vehicles being
constructed of light steel tubing and charged with air communicating with cylinders
having pistons attached to the wheel axles and the seat, thus the cylinders
forming air springs upon which the rider sits poised. Also the compressed air
within the tubes makes the frame more rigid and obviates all vibration. The air
can be injected at will by the rider moving on the seat, and the pressure regulated
to any degree indicated by a small pressure gauge. Sounding signals can be
attached and operated at will.
These air springs can be applied to any kind of carriage, the piston being operated
by air pressure on one side and vacuum on the other.
Dated this 2nd day of June 1891.
JOHN ANDERSON.
COMPLETE SPECIFICATION.
Improvements in Frames for Cycles and other Vehicles.
JOHN ANDERSON 38 Elswick Row Newcastle-on-Tyne Engineer 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 consists in the frames of cycles and other light vehicles being
constructed of steel or other tubing, and charged with air or gas communicating
with cylinders and pistons so placed as to form springs upon which the frame with
the rider is poised. Also the pressure of air within the tubes makes the frame
more rigid and obviates all vibration, and lighter material can be employed in
construction than have been used up till the present time. The air cylinders or
springs can be placed in various positions.
I will now proceed to explain this my said invention more fully by the aid of the
accompanying drawing showing one example of a safety bicycle.
A is an air injector attached to and operated by the motion of the seat to
maintain a constant pressure by forcing air through the flexible tube B into the
frame E and cylinders D and F, pressing the pistons C and F¹. Connected with
the wheel bearings rises the frame to the desired position, with the necessary
pressure to carry the weight of the rider. The bearing of the rear wheel is
attached to bracket H of the frame by stay G.
The working parts of the cylinders being protected from dust by flexible covers.
The frame is provided with safety valve to dispose of excess pressure.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
1st. The employment of air cylinders and pistons as springs for cycles and other
light vehicles.
2nd. The charging the frame with air or gas to secure rigidity combined with

page_text: 3rd. The air injector in combination with the seat and frame to maintain a
constant pressure substantially as shown and for the purpose set forth or any mere
modification of the same.