Improvements in Pumps or Inflators for Pneumatic Tyres and other Inflatable Articles.
Year: 1896

page_text: Date of Application, 4th June, 1896
Complete Specification Left, 4th Mar., 1897-Accepted, 10th Apr., 1897
Improvements in Pumps or Inflators for Pneumatic Tyres and other
Inflatable Articles.
JAMES GEORGE STIDDER, of 66 Woddon Old Road, Croydon in the County
of Surrey, Sanitary Engineer, do hereby declare the nature of my said invention to
be as follows:-
The object of my invention is to effect improvements in pumps or inflators for
pneumatic tyres and other inflatable articles.
According to my invention, I fit a single-acting cylinder with a trunk piston, and
a rotating crank mounted in suitable bearings integral with the cylinder. A
connecting rod is fitted to the crank and piston respectively oscillating in the
trunk of the piston. The lower end of the piston is fitted, with a cup leather
or other form of packing. The cup leather is secured in position by a
perforated plate of "woodite" or other material. The piston, cup, and plate
are each perforated with a number of holes for the admission of air
to the underside of the piston. Over these holes an elastic disc is
fitted, the whole being held together by a nut upon a screw integral with the piston..
At the lower end of the cylinder a perforated cover is fitted, the perforations
corresponding with similar holes in a plate, external to the cover, over which holes
an elastic disc, and a circular segmental guard, are fitted, the whole being held
together by a nut upon a screw integral with the cylinder cover. A valve-box,.
enclosing this valve is screwed to the cylinder, the valve-box being fitted with the
usual screwed nozzle, having a small perforation for the passage of the compressed.
air to the preumatic tyre or other article.
In some cases I use two cylinders and two cranks placed 180° apart the cylinders.
being in other respects fitted as above described, the lower outlet passages being
united and connected with a single perforated nozzle.
The pumps are worked by turning the cranked axles by means of a movable
pivoted or jointed handle.
Dated 4th June 1806
GEO.
DOWNING,
8 Quality Court, London, W.C., Agent.
COMPLETE SPECIFICATION.
Improvements in Pumps or Inflators for Pneumatic Tyres and other
Inflatable Articles.
I, JAMES GEORGE STIDDER, of 66 Waddon Old Road, Croydon, in the County
of Surrey, Sanitary Engineer do hereby declare the nature of my said invention
and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement:-
The object of my invention is to effect improvements in pumps or inflators for
pneumatic tyres and other inflatable articles.

page_text: And in order that my said invention may be particularly described and
ascertained, reference is hereby made to the accompanying drawings, in which
similar figures of reference indicate corresponding parts.
Fig. 1 is a sectional elevation, illustrating the application of my invention to a
single-cylinder rotary pump; and Fig. 2 is an elevation of a double-cylinder pump,
both being what is known as "single-acting."
Referring to Fig. 1: 3 is the cylinder fitted with a trunk piston or plunger 4. The
crank 5 is mounted in bearings 6 on each side of the open end of the cylinder, and
integral therewith. 7 is the connecting rod fitted to the crank at 8. and pivoted to
the piston at 9, and oscillating in the trunk piston as the crank rotates. The
underside of the piston is fitted with a cup-leather 10, or other form of packing.
The cup-leather is secured in position by a perforated plate of woodite or other
suitable material 11.
The piston, cup, and plate, are each perforated with a number of corresponding
holes 12 for the admission of air to the underside of the piston.
Over these holes an elastic disc 13 is fitted, the whole being held together by a
nut upon a screw at 14, the screw being integral with the piston.
At the lower end of the cylinder a suitable non-return valve is fitted. In that
shown in Fig. 1 a perforated cover 15 is fitted, the perforations corresponding with
similar holes in a plate 16, over which holes an elastic disc 17 and a circular
segmental guard 18, are fitted; the whole being held together by a nut upon a
screw at 19, the screw being integral with the cover plate 15. 20 is a valve box,
screwed to the cylinder and enclosing the valve, the valve box being fitted with the
usual screwed nozzle 21, having a small perforation 22 for the passage of the
compressed air to the pneumatic tyre or other article.
Fig. 2 illustrates the application of my invention to a double-cylinder pump, with
two cranks placed 180° apart on one shaft, the cylinders being in other respects
fitted as above described, the lower outlet passages of the valve boxes 20, 20, being
united and connected with a perforated nozzle 21.
The pumps are worked by turning the cranked axles by means of a movable,
pivoted, or jointed bandle, or can be driven by geared wheels worked from the
said handle.
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 improvements in pumps or inflators for pneumatic tyres and other
inflatable articles, substantially as herein before described and illustrated by the
drawings.
2. In a pump or inflator for the purposes aforesaid, the combination of a single-
acting cylinder, a trunk or rod piston, a crank mounted in bearings actuating the
piston by means of a connecting rod, the cylinder and piston being fitted with valves
and passages, substantially as herein before described and illustrated by Fig. 1 of
the drawings.
3. In a pump or inflator for the purposes aforesaid, the combination of two
single-acting cylinders, operated by a shaft fitted with two cranks at angles of 180°
apart, substantially as herein before described and illustrated by Fig. 2 of the
drawings.