Improvements in Automatic Valves for Pneumatic Tyres of Cycles and the like.
Year: 1897

page_text: Date of Application, 29th Nov., 1897-Accepted, 29th Jan., 1898
COMPLETE SPECIFICATION.
Improvements in Automatic Valves for Pneumatic Tyres of Cycles
and the like.
We, HEINRICH KRUSE, Engineer, and JOHANN SAUL, Engineer, both of 8, Scheffel
Strasse, Hanover, in the German Empire, 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:-
The present invention relates to improvements in automatic valves, and is
particularly applicable to the inflating valves of the pneumatic tubes of cycle
tyres.
The invention is shewn in the annexed drawing in a longitudinal section.
The valve stem or nipple (a) is fastened in the ordinary manner to the pneumatic
tube (A) and is provided at its bottom end with a head, which, when the valve is
attached to the tyre, will be situated inside the pneumatic tube. The external
part of the stem projecting from the tyre is provided with a screw thread. The
stem is hollowed in its whole length; the hole in the head part of the stem being
of smaller diameter than that of the other part. The head part of the stem may
also be made detachable from the other part or may be soldered to it. The fasten-
ing of the stem (a) to the pneumatic tube is effected in any suitable manner that
is to say, by screwing down a nut (c), and to attain an air-tight closure a washer (6)
may be arranged between the nut (c) and the pneumatic tube (A). A spiral
spring () the coils of which are slightly conical and which can be made of any
suitable material such as brass or steel wire, is arranged in the hollow stem, hearing
at one end against the head part and carrying at the other end a ball (c). This
ball (e) may consist of metal or rubber and is pressed by the spiral spring (d)
against a conical seating (f) of rubber. The seating (f) is arranged inside an
inverted cup () which, being screw threaded, is screwed down on to the stem (a).
A projection (') also screw threaded, is attached to the top part of the cup (9),
to which the inflator is attached when inflating. To attain an air-tight closure
the cup (g) is provided at its bottom end with a flange (9) against which a rubber
or leather washer (h) is pressed by means of a nut (2) screwed on to the stem (a).
The cap (o) which is screwed on to the projection (9) to prevent an escape of air
when the tyre is inflated and dust entering the valve, is furnished with a collar (n)
to which is fastened a chain (m) ending in a ring (7) which fits into a recess in
the nut (2).
It is unnecessary to describe the manner of operation as it will be easily under-
stood from the above description and drawing accompanying same.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is:
1. In automatic valves for the pneumatic tubes of tyres the arrangement of
a ball (e) resting upon a spiral spring (d) by which it is pressed against seating (f)
the latter being situated in a cup (9) screwed on to the stem (a) which projects
from the pneumatic tube

page_text: 2. In combination with pneumatic valves for pneumatic tubes of tyres as
characterized in Claim 1 the arrangement of a washer (h) on top of a nut (i) to
ensure a hermetically closing of the cup (g).
Dated the 29th day of November 1897.
W. D. ROWLINGSON,
7, Quality Court, Chancery Lane, London, E.C.,
Agent for the Applicants.