Improvements in Automatic Cycle Pumps.
Year: 1899

page_text: Date of Application, 15th Nov., 1899-Accepted, 16th Dec., 1899
Improvements in Automatic Cycle Pumps.
I, WILHELM LOEBINGER, of 16, Claudiusstrasse, Berlin, in the Empire of Ger-
many, Merchant, 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 has for its object an automatic cycle pump which is fixed on
the axle of the front and rear wheels and thus rotates with the wheel, and is
operated at each revolution by a suitable cam or contact on the cycle frame.
The invention consists in the peculiar arrangement by means of which the pump
in case of need may be thrown into or out of action, and which acts entirely
automatically.
The object of the invention is shown in the accompanying drawings diagramma-
tically and as an example, in its application to the rear wheel of a cycle.
The arrangement and mode of working of this apparatus is as follows:
A pump cylinder c is attached to the hub of the wheel a by means of clamps b,
which pump cylinder is connected by means of a pipe d with the air tube e, and
the back pressure valve f is no longer as hitherto arranged on the wheel rim but in
close proximity to the pump cylinder c. In the pump cylinder ca piston g is
constantly pressed outwards by means of a spring h, so that the piston rod i is
pressed with the slide roller on its outer end against a fixed contact cam k on
the cycle frame.
On the rotation of the wheel the pump piston is operated accordingly, corre-
sponding to the shape of the contact or cam k and thus the air tube e is inflated.
When the latter is sufficiently inflated, that is to say when a maximum pressure
or even an excess pressure is produced therein, an automatic stopping of the pump
must take place. For this object a branch pipe is arranged on the pipe d behind
the valve f, which branch pipe ends in an indiarubber bag m which is arranged
in a fixed casing.
When this bag is inflated in consequence of the maximum pressure existing in
the air tube, it presses outwardly a piston n against the action of a spring o, in
such a way that a double armed lever p is caused to turn on its pivot to a certain
extent. The other end of this double armed lever p thereby presses a bolt
against the piston rod i in such a way that this bolt q engages in a notch of
the piston rod i as soon as the latter in its movement reaches a suitable place.
The action of the pump then ceases immediately, as this position corresponds to
the innermost stroke of the piston and the pump is immediately stopped.
If the air pressure in the air tube e diminishes in consequence of leakage or the
like, the pressure in the bladder m also of course diminishes, so that the spring o
is in a position to press inwards the piston n by means of the lever p.
The pawl q
is thereby simultaneously thrown out of the notch r of the piston rod so that
the action of the pump again immediately commences and continues until it is
again thrown out of action in the manner herein before described.
The throwing into action and out of action of the pump is thus automatic.

page_text: 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. An improved automatic cycle pump rotating with the wheel, characterised
by the pump being connected with the air tube. by means of a pipe having a
branch pipe ending in an indiarubber bag behind the back pressure valve in such
a way that said indiarubber bag in case of an excess of pressure in the air tube
expands and operates a lever and thereby effects the engagement of a bolt for
locking the pump piston, whilst on the pressure in the air tube becoming reduced,
a movement of the lever gear takes place in the opposite direction thus withdraw-
ing the bolt and allowing the pump to again work, whereby the pump is thrown
into and out of gear entirely automatically, substantially as hereinbefore set forth.
2. The general construction and combination of parts taken as a whole forming
the improved automatic cycle pump, substantially as hereinbefore described, with
reference to the accompanying drawings.).
Dainer
1
COAT TO
του.
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Agents for the Applicant.