Year: 1897

page_text: I, ALLANSON S. SIMPSON, Engineer, of Folsom, in the County of Union, and
Territory of New Mexico, United States of America, do hereby declare the nature
of this invention to be as follows:-
This invention is a pump for inflating the pneumatic tyres of bicycle and other
vehicle wheels, the pump being operated by the movement of the wheel and being
provided with means by which to throw it in and out of gear at the will of the
person riding the vehicle.
The invention is described as applied to the front wheel of a safety bicycle. The
axle of the wheel is held in the fork of the frame and the hub turns loosely on
the axle. A plate is made fast to the hub of the wheel and runs radially there-
from and a pump cylinder is fixed to this plate and is braced against the spokes of
the wheel a tube leading from the pump cylinder to the tyre of the wheel whereby
to inflate the same. An eccentric is loose on the axle and arranged alongside the
wheel and has in its outer face an inclined way at one end of which a lug is
formed, such lug having two recesses. Rocking in bearings carried by one arm of
the fork is a shaft the lower end of which is provided with a fixed two-fingered dog.
This shaft may be rocked to engage and disengage said dog with and from the
lug. When the dog is engaged with the lug the eccentric is fixed to the fork and
when disengaged the eccentric turns idly around with the wheel. The upper end
of the rock shaft has a pivoted operating arm co-acting with a ratchet plate fixed
to one arm of the fork, the said arm by its operation with the ratchet plate serving
to hold the shaft in either of its two positions. An eccentric strap is mounted
with anti-friction balls on the periphery of the eccentric and the pump. piston
rod is attached to the strap.
If the dog and lug are disengaged the wheel in turning carries the pump
cylinder with it and the eccentric and strap will play idly around the axle in
which condition the piston is not operated. Should it be desired to supply air
to the tyre the dog is engaged with the fork so that when the wheel turns the
eccentric strap moves around the eccentric which imparts a reciprocal movement
to the pump piston, and air is pumped into the tyre. The inclined way on the
eccentric guides the dog up to engagement with the lug and the dog is thrown
against the eccentric by the action of the rock shaft and as the eccentric revolves
the dog is moved gradually up along the inclined way into engagement with
the lug.

page_text: I, ALLANSON S. SIMPSON, of Folson, in the County of Union, and Territory of
New Mexico, United States of America, 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 of a pump for inflating the pneumatic tyres of bicycle
and other vehicle wheels, the pump being operated by the movement of the wheel,
and being provided with means by which to throw it in and out of gear at the
will of the person riding the vehicle.
This specification is the disclosure of one form of my invention, while the
claims define the actual scope of the conception.
Reference is to be had to the accompanying drawings, forming a part of this
specification, in which similar characters of reference indicate corresponding parts
in all the figures.
Figure 1 is a side elevation of a bicycle wheel equipped with my invention;
Figure 2 is a sectional view on the line 2-2 of Figure 1;
Figure 3 is a detail section taken through the eccentric which I employ;
Figure 4 is a face view of the eccentric; and
Figure 5 is a detail section looking upward from the line 5-5 of Figure 1.
The invention is illustrated as applied to the front wheel of a safety bicycle.
The axle 6 of the wheel is held in the fork 7 of the frame, and the hub 8 turns
loosely on the axle. A plate 9 is made fast to the hub 8 of the wheel and runs
radially therefrom and a pump cylinder 10 is fixed to the plate 9 and is braced
against the spokes of the wheel by means of a wire lashing 11. A tube 12 leads
from the cylinder 10 to the tyre of the wheel, whereby to inflate the same.
An eccentric 13 is loose on the axle 6, and arranged alongside the wheel and
has in its outer face an inclined way 14, at one end of which a lug 15 is formed,
having two recesses 16. Rocking in bearings carried by one arm of the fork 7
is a shaft 17, the lower end of which is provided with a fixed two-fingered dog 18.
The shaft 17 may be rocked to engage and disengage said dog 18, with and from
the lug 15. When the dog 18 is engaged with the lug 15 the eccentric 13 is
fixed to the fork 7 and when the parts 18 and 15 are disengaged the eccentric
turns idly around with the wheel. The upper end of the shaft 17 has a pivoted
operating arm 19 (see Figure 5) coacting with a ratchet plate 20 fixed to one arni
of the fork 7, the arm 19, by its operation with the ratchet plate 20, serving to
hold the shaft 17 in either of its two positions. An eccentric strap 21 is mounted
with anti-friction balls on the periphery of the eccentric 13 and a piston rod 22
is attached to the strap 21 and works through the inner end of the cylinder 10,
the outer end of the rod 22 carrying a piston 23 which co-acts with the cylinder.
If the dog 18 and lug 15 are disengaged, the wheel, in turning around the axle 6,
carries the cylinder 10 with it, and the eccentric 13 and strap 21 will play idly
around the axle 6, in which condition the piston 23 is not operated and the device
is inactive. Should it be desired to supply air to the tyre, the shaft 17 is rocked
to engage the dog 18 with the lug 15 so that when the wheel turns under these
conditions, the eccentric strap 21 moves around the eccentric, which imparts a
reciprocal movement to the rod 22, and air is compressed within the cylinder 10 and
forced through the tube 12 to the tyre. The inclined way 14 on the eccentric
guides the dog 18 up to engagement with the lug 15. The dog 18 is thrown against
the eccentric by the action of the shaft 17 and as the eccentric revolves the dog
is moved gradually up along the way 14 into engagement with the lug 15.

page_text: Various changes in the form, proportion and minor details of my invention may
be resorted to without departing from the spirit and scope thereof, hence, I do not
consider myself limited to the precise construction herein shown, but believe that
I am entitled to all such variations as come within the terms of my claims.
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 combination of a frame, an axle held thereby, a wheel turning loose on
the axle, a cylinder carried by the wheel, a piston working in the cylinder, a rod
attached to the piston, an eccentric loose on the axle and having a lug, a strap
embracing the eccentric and connected with the rod of the piston, a shaft rocking
in the frame, and a dog carried by the shaft and capable of engaging the lug
whereby to stop the revolution of the eccentric.
2. The combination of a shaft, an eccentric loose thereon, the eccentric having a
lug provided with two recesses and the face of the eccentric having an inclined
way running up to the lug, a shaft rockably held by the frame, and a dog carried
by the shaft and having two fingers capable of respectively engaging in the
recesses of the lug.
3. The combination of a shaft, an eccentric loose on said shaft, a strap turning
around the shaft and coacting with the eccentric, a rock shaft mounted adjacent to
the eccentric, and a dog carried on the rock shaft and movable to engage and dis-
engage the eccentric whereby to hold the same fixed with reference to the shaft.
1007
A. M. & WM. CLARK,
Chartered Patent Agents, 53, Chancery Lane, London.