Improvements in the Valves of Oil, Gas, or Vapour Motors, particularly those Employed on Motor Vehicles.
Year: 1898

page_text: Date of Application, 27th Sept., 1898
Complete Specification Left, 27th June, 1899-Accepted, 5th Aug., 1899
Complete Specification Left, 27th June, 1899-Accepted, 5th Aug., 1899
Improvements in the Valves of Oil, Gas, or Vapour Motors,
particularly those Employed on Motor Vehicles.
I, HARRY PARSONS, of Cold Harbour, Earlsdon, near Coventry, in the County
of Warwick, Engineer, do hereby declare the nature of this invention to be as
follows:-
-
This invention relates to oil, gas or vapour motors, and consists of an improved
form of compression tap or valve, the object of which is to allow free or partial
communication from the inside of the cylinder to the atmosphere so as to mini-
mize the compression and explosion in the cylinder to enable the vehicle to be
started gently, or to be more easily moved when the motor is not at work.
The compression taps or valves now in use soon gall and thereby leak and also
have a tendency to jam with the heat. These disadvantages are overcome in the
present invention, and further a larger port or opening is provided between the
cylinder and the atmosphere, thereby enabling the compression to be reduced
to a greater extent.
A valve constructed according to this invention consists essentially of a screw
threaded valve spindle passing through and engaging with similar screw threads
formed in the cover or other convenient part of the cylinder.
The screw threads on the valve spindle are preferably square and of double
or triple pitch so as to allow of the valve being opened or closed by one quarter
revolution of the spindle. The inner end of this screw threaded spindle carries
a disc or coned valve which is adapted to close on to a seating having one or
more ports or passages communicating with the atmosphere.
Instead of mounting the valve directly in the cylinder cover, it may be mounted
in an independent plug adapted to be screwed or otherwise fixed in the cylinder
cover.
Any suitable means may be employed for imparting rotary movement to the
valve spindle preferably by means of a lever fixed on its free end and connected
by a knuckle joint with the usual compression rod. This construction allows of
a ready means for limiting the opening movement of the valve as the knuckle
end of the rod can be so arranged as to prevent the lever of the valve spindle
travelling more than a predetermined distance.
It will be seen that as this valve has a rotary movement it grinds itself down
on to its seating each time it is closed.
Dated thin 07th dar of Contamban 1808

page_text: Improvements in the Valves of Oil, Gas, or Vapour Motors,
particularly those Employed on Motor Vehicles.
I, HARRY PARSONS, of Cold Harbour, Earlsdon, near Coventry, in the County
of Warwick, Engineer, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:
-
This invention relates to oil, gas and other internal combustion engines, and
consists of an improved form of valve for opening the combustion chamber or
back end of the cylinder to the air for the purpose of relieving or minimizing
the compression and explosion in the cylinder to enable the vehicle to be started
gently, or to be more easily moved when the motor is not at work.
The compression relief taps or valves now in use soon gall and thereby leak
and also have a tendency to jam with the heat. These disadvantages are over-
come in the present invention, which further provides a port or opening of
increased area thereby enabling the compression to be reduced to a greater extent.
In the accompanying drawing which illustrates-by way of example only-
some methods of carrying the invention into practice :-
-
Figure 1 is a broken view in vertical section, Figure 2 a view in plan, and
Figure 3 a broken view partly in section, showing one form my invention may
assume the valve being closed.
Figures 4 and 5 are views in broken vertical section and plan respectively,
showing an alternative construction, and Figures 6 and 7 are broken views in
vertical section and transverse section respectively showing another modification.
Throughout the views similar parts are marked with like letters of reference.
A valve constructed according to my invention comprises a spindle A carry-
ing a cone-shaped or other suitable head A' adapted to take a seat either on the
part of the combustion chamber or cylinder in which the valve is intended to
be mounted or on a bush B adapted to be screwed into the cylinder or combus-
tion chamber as shown in the drawing.
The valve spindle A is threaded in the bush 13 or its equivalent by a coarse
pitched screw so that a slight revolution of the spindle will raise or close the
valve on its seating. This valve spindle A may be operated through an arm or
lever such as C or by any other suitable device.
To enable the head A to be rotated independent of its screwed spindle A for
the purpose of more efficiently grinding it on its seating, I either mount the
head A so that it is free to rotate on the end of the valve spindle A as shown by
Figure 4, or I make the valve spindle A plain and pass it through a sleeve A
provided with an exterior screw thread adapting it to be screwed into the bush A
or its equivalent. I then fix the sleeve A to the spindle A by any suitable
device such as a cross pin a as shown in Figure 6, which pin can also be con-
veniently employed for fixing the boss c of the lever C to the said spindle.
In the construction shown by Figures 1, 2 and 3 the outlet is formed through
the spindle A which is made hollow its walls being pierced by a suitable number
of holes a immediately under the head A¹
In the two constructions shown by Figures 4 and 5 and 6 and 7, respectively,
the outlets are formed by longitudinal passages in the bush B or its equivalent,
in the former the outlet takes the form of holes a through the thickness of the
bush and in the latter the form of slots a³, through the threaded hole of the bush.
It will be seen that as this valve has a rotary movement, it tends to grind
itself on its seating each time it is closed.

page_text: Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed, I declare that what
I claim is:-
(1) The improved compression relief valve for internal combustion engines,
as herein before described and illustrated by the accompanying drawing.
(2) A compression relief valve for internal combustion engines adapted to be
raised or lowered on its seating by a screw action and having a free rotary move-
ment apart from its operating spindle, as and for the purpose set forth.
(3) In a compression relief valve for internal combustion engines, the com-
bination with a bush such as B or its equivalent forming a seat for the valve, of
a hollow spindle such as A threaded in the said bush or its equivalent, of a coned
or other suitably shaped valve such as A¹ formed on or fixed to the spindle A, of
an outlet through the spindle A, and of means for operating the spindle A, as
and for the purpose set forth.
(4) In a compression relief valve for internal combustion engines, the com-
bination with a bush such as B or its equivalent forming a seating for the valve
and having one or more outlets through it, of a spindle such as A threaded in the
said bush or its equivalent, of a coned or other suitably shaped valve such as A¹
formed on or fixed to the spindle A, and of means for operating the spindle A
as and for the purpose set forth.
(5) In a compression relief valve for internal combustion engines, the combina-
tion with a bush such as B or its equivalent forming a seating for the valve, of
a spindle such as A. screw-threaded into the bush B, of a valve such as A¹ so
mounted on the end of the spindle A. that it is free to rotate on its seating apart
from the spindle, of an outlet through the spindle A or bush B or its equivalent,
and of means for operating the spindle, as and for the purpose set forth.
(6) In a compression relief valve for internal combustion engines, the combina-
tion with a bush such as B or its equivalent forming a seating for the valve, of
a sleeve such as A threaded in the said bush or its equivalent, of a spindle such
as A fitting loosely in the sleeve A, of a valve such as A' formed on or fixed to
the spindle A and taking a seating on the bush B or its equivalent, of means for
locking the spindle A to the sleeve A2 of an outlet for the compressed air or the.
gases, and of means for directly or indirectly operating the sleeve A³, as and
for the purpose set forth.
مقصد
ROBERT E. PHILLIPS, Assoc. M. Inst. C.E., M.I. Mech. E.,
Chartered Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicant.