Improvements in Valves for Pneumatic Tyres.
Year: 1892

page_text: Date of Application, 26th Aug., 1892
Complete Specification Left, 25th May, 1893-Accepted, 5th Aug., 1893
PROVISIONAL SPECIFICATION.
Improvements in Valves for Pneumatic Tyres.
I, MARCEL LEJEUNE, of 31 Boulevard Henri IV., Paris, in the Republic of
France, Gentleman, do hereby declare the nature of this invention to be as
follows:
This invention relates to an improved valve for pneumatic tyres of velocipedes
and has for its object to simplify the inflation of such tyres and remedy the defects
hitherto experienced, i.e. the gradual escape of air through the dust or sand causing
the valve to get out of order.
To this end my improved valve consists of a bush having a plug, the inner end
of which communicates with the air chamber of the tyre, being formed with an
elbow port and a seat which receives a ball valve, the latter being prevented from
leaving the plug by a bar. The said elbow port also communicates with a passage
in the bush and the latter with a port formed in the said plug crosswise and with a
The
port in the said bush, which latter is in communication with an air pump.
connection between the latter and the bush is made by forming the said bush at
its outer end conical and fitting the outlet of the air pump correspondingly to it.
The plug in the said bush is rendered movable by a pin, fixed to the outlet of
the said air pump which is fitted onto the outer end of the said bush, the latter
The said bush is
being formed with an incline on which the said pin moves.
formed at its inner end with a flange and thread and is secured to the rim of the
pneumatic tyre by means of a nut or nuts.
The action of the valve is as follows:-
Assuming the valve is closed and the pneumatic tyre requires inflating, the outlet
of the air pump is fixed to the said bush by means of the pin aforesaid, which
permits of moving the plug by hand a quarter of a turn and thereby establish
When the
communication between the said air pump and air chamber of the tyre.
pneumatic tyre is sufficiently inflated a reverse movement will close the respective
passages and ports and the operation is finished.
A modification of my improvements consist in employing in the said bush a valve
On the outer end of the
spindle, which closes or opens the inner end of the same.
said spindle a spiral spring is placed between two discs, the inner disc bearing
against a shoulder on the bush and the outer one against a nut screwed onto the
end of the said spindle, the spiral spring forcing the valve spindle against its seat.
The valve is operated by forcing the spindle back which may be effected by the
outlet of the air pump.
The lower end of the bush internally is made slightly taper so as to receive the
outlet of the air pump and permit of forcing it against the outer plate of the afore-
said disc and push the valve.from its seat.
In disconnecting the air pump the valve is drawn back to its seat by means of
the said spring.
Another modification of my improvements consist in screwing a nozzle onto the
lower end of the bush, having internally a rim which comes into contact with the
aforesaid spring disc and thus raises and opens the valve, and vice versa.
Dated this 25th day of August 1892.
נד
F. DOSSHARDT & Co.,
Agents to Applicant.

page_text: COMPLETE SPECIFICATION:
Improvements in Valves for Pneumatic Tyres.
I, MARCEL LEJEUNE, of 31, Boulevard Henri IV., Paris, in the Republic of
France, Gentleman, 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 relates to an improved valve for pneumatic tyres of velocipedes
and has for its object to simplify the inflation of such tyres and remedy the defects
hitherto experienced, i.e. the gradual escape of air through the dust or sand causing
the valve to get out of order.
And in order that my invention may be more fully understood I have caused to
be appended hereunto one sheet of drawings marked with letters of reference
indicating like parts in the various figures.
Fig. 1 is a longitudinal section of the valve.
Fig. 2 is a plan of the double threaded nut.
Fig. 3 is a plan of the disc and spiral spring.
Fig. 4 is a vertical section of the pump connection.
Fig. 5 is a vertical section of another form of a pump connection.
Fig. 6 is a plan of Fig. 5.
Referring to Figs. 1, 2 & 3, my improved valve consists in employing in a bush A,
a spindle G, forming a valve g, which closes or opens the inner end of the same.
On the outer end of the spindle Ga spiral spring c is placed between two
discs o, o¹, the inner disc o bearing against a shoulders on the bush A and the
outer disc o against a nut N screwed onto the end of the spindle G the spiral
spring c forcing the latter against its seat.
The bush A is formed with a mushroom shaped head i and a flanged nut T
screwed against it, by means of which the tyre is embedded securely in the head i.
The flanged nut T is formed with a thread on which is screwed the nut U for the
purpose of securing the valve to the rim of the wheel.
The lower end of the bush A, internally is made slightly taper, so as to receive
the nozzle D' of the outlet D of the air pump and permit of forcing it against the
outer disc o, compressing the spring c and pushing the valve g from its seat.
In disconnecting the air pump, the valve g is drawn back to its seat by means
of the spring c.
The air pumps at present in use introduce the air through a flexible tube which
lessens the action of the pump. This defect I obviate by the employment of a
nozzle D on the bush A having a valve s, see Figs. 1, 5 & 6.
The nozzle D is internally threaded at n' and screwed to the threaded end of the
valve described, its projecting tubular part n pressing against the valve disc o¹,
shown in dotted lines. The hollow smaller part of the nozzle D has a cross
arranged crosswise which is hollow at its inner end and serves for the reception of
a spiral spring which presses slightly on the flap valve s which closes the air
orifice s¹. This nozzle being connected to the flexible tube of the air pump permits
an easy drawing back of the air pump piston, facilitates the admission of air at s¹
and gives a better result even if the piston may be a bad fit in its cylinder. This
arrangement also permits a larger passage of air for inflation, the air arriving easily
and freely through the orifice s¹.
In deflating the tyre it is sufficient to press the nut N by the thumb.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner, the same is to be performed, I declare that what I
claim, is-
1st. A bush having a spindle formed with a valve forced to its seating by means ♬

page_text: of a spring lodged in the interior of the bush between two discs and a nut,
substantially as and for the purpose set forth.
2nd. Operating the valve referred to in the preceding claim, by means of the
pump connection adapted to depress the outer disc and compressing the spring
thereby raising the valve from its seating, substantially as and for the purpose set
forth.
3rd. A nozzle adapted to be screwed onto the aforesaid bush for the purpose of
operating the valve by exerting pressure on the outer disc and compressing the
spiral spring, substantially as and for the purpose set forth.
4th. The arrangement of an air valve as described in connection with the nozzle
aforesaid, substantially as and for the purpose set forth.
Dated this 24th day of May 1893.
F. BOSSHARDT & Co.,
4, Corporation Street, Manchester, Agents to Applicant.