Improvements in Bicycles and Tricycles.
Year: 1886

page_text: Date of Application, 15th Feb., 1886
Complete Left, 2nd Nov., 1886.
Complete Accepted, 15th Feb., 1887
PROVISIONAL SPECIFICATION.
Improvements in Bicycles and Tricycles.
I, DAVID CHRISTIE, Jr., of "Sunny Bank" Mead Vale, Redhill, in the county of
Surrey, Engineer, do hereby declare the nature of my invention for "IMPROVEMENTS
IN BICYCLES AND TRICYCLES," to be as follows:-
On the axle (a) are placed two cog wheels, the wheels have clutches (b) which only
move the axle when revolved in one direction, leaving the axle free when revolved in
the opposite direction. The wheels are rotated by a toothed rod (e) its length being
equal to more than the circumference of the cog wheel, one end of each rod is hung
on the end of a rocking lever (d), the other end having a fulcrum at (e), the rocking
lever has a slot at (1) the end of a connecting rod (g) is placed in the slot the other
end is connected with a crank or a treddle (h) by moving the connecting rod up or
down in the slot, a longer or shorter stroke is given to the toothed rod (e) or a
greater or less revolution is given to the axle (a), the speed may be varied by moving
the connecting rod to any part of the slot.
I, DAVID CHRISTIE, Jr., of "Sunny Bank" Mead Vale, Redhill, in the county of
Surrey, Engineer, do hereby declare the nature of my invention for "IMPROVEMENTS
IN BICYCLES AND TRICYCLES," to be as follows:-
:―
On the axle (a) are placed two cog wheels, the wheels have clutches (b) which only
move the axle when revolved in one direction, leaving the axle free when revolved in
the opposite direction. The wheels are rotated by a toothed rod (e) its length being
equal to more than the circumference of the cog wheel, one end of each rod is hung
on the end of a rocking lever (d), the other end having a fulcrum at (e), the rocking
lever has a slot at (1) the end of a connecting rod (g) is placed in the slot the other
end is connected with a crank or a treddle (h) by moving the connecting rod up or
down in the slot, a longer or shorter stroke is given to the toothed rod (c) or a
greater or less revolution is given to the axle (a), the speed may be varied by moving
the connecting rod to any part of the slot.
DAVID CHRISTIE, JR.

page_text: Improvements in Bicycles and Tricycles.
I, DAVID CHRISTIE Jr., of Sunny Bank, Mead Vale, Redhill, in the County of
Surrey, 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:-
On the axle (a) are placed two cog wheels the wheels have clutches (b) which only
move the axle when revolved in one direction leaving the axle free when revolved in
the opposite direction, the wheels are rotated by a toothed rod (e) its length being
equal to more than the circumference of the cog wheels, one end of each rod is hung
on the end of a rocking lever (d) the other end having a fulcrum at (e) the rocking
lever has a slot at (f) the end of a connecting rod (g) is placed in the slot the other
end is connected with a crank (h) by moving the connecting rod up or down in the
slot, a longer or shorter stroke is given to the toothed rod (e) or a greater or less
revolution is given to the axle (a) The speed may be varied by moving the connecting
rod to any part of the slot The rod (g) is moved up or down in the slot from the
handles (a evil wheel is fixed on the handle bar which works a second bevil
wheel (this wheel is fixed on a spindle (4) a thread is formed on the other end
which works in a corresponding thread in the rod (1) which is connected with
lever (m) two rods (u) and (²) are placed at the other end of (m), the other ends of
the rods (a) and (¹) being connected with the rod () by moving the handle bar
back or forward, the end of the rod (g) is raised or lowered in the slot (/). The cog
wheels may be thrown out of gear by raising the toothed rods clear of the teeth of
the cog wheels. The toothed rods must be raised when the machine is required to be
run backwards.
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. The method of varying the speed by means of the slotted bar.
2. The cranks may be driven either back or forward the machine being driven
forward in either case.
3. Great variety of speed and power.
4. Quickness of alteration from highest to lowest power.
5. The speed may be varied while the machine is in motion and while the cranks
are also in motion.
DAVID CHRISTIE, JUNR.