An Improved Suction Valve for the Compression Pumps of Freezing or Cooling Machines.
Year: 1891

page_text: Date of Application, 23rd Nov., 1891
Complete Specification Left, 17th Aug., 1892-Accepted, 1st Oct., 1892
.
PROVISIONAL SPECIFICATION.
An Improved Suction Valve for the Compression Pumps of Freezing
or Cooling Machines.
I, JOHANN LEONHARD SEY BOTH, Chemist, of Lindwurmstrasse 71/0 Munich,
in the Kingdom of Bavaria, Empire of Germany do hereby declare the nature of
this invention to be as follows:-
This invention relates to freezing or cooling machines in which gas such as
ammonia is compressed to be subsequently expanded for the production of so called
cold, and it consists in an improved compression valve as hereinafter described and
illustrated in the drawing.
The valve carries a piston d moving in a cylinder, this cylinder has three pairs
of openings ii, kk, and the spindle is provided with corresponding holes so
that it may be turned by the hand wheel so as to open communication between
the space m and the interior of the aforesaid cylinder through either the holes it,
kkor. By this arrangement the freedom of the spaces above and below the
piston d is closed sooner or later so that the stroke of the valve is made greater
or less and the speed of the machine controlled accordingly.
The hand wheel is provided with marks so that the indicator z shows the
position of the spindle b. Gases escaping by the piston d failing to fit tightly may
be compensated through the valve c which is held in place by a very weak
spring.
When the piston n moves in the direction of the arrow the valve g opens until
the underside of the piston d arrives level with the lower opened hole or or
since the gas in the space freely passes out into the spindle and space m.
Further movement of the piston causes the gas in the space to form cushion
to stop the further opening of the valve g.
As the valve inust move freely the piston d must not slide too tightly in the
cylinder, in practice therefore and after the machine has been running some time
the piston will leak causing the cushioning to be less effectual. To avoid incon-
venience from this leaking the piston and cylinder are made small and the
openings i, kk, ll arranged accordingly. When the valve g closes again the
valve c opens allowing gas to pass. very freely into the chamber while the piston
is cushioned above just before the valve g closes. The valve g may be closed by a
spiral spring omitted from the drawing for the sake of clearness. A valve similar
to c may also be provided to allow gas to freely enter the space above the
piston so that the valve g may open freely even if the cushioning above the
piston shall have been defective. To provide for this second valve the body in
two parts is provided on the rear side with a bore similar to that in which the
spindle is placed, said bore receiving the aforesaid valve similar to c. In place of
three holes ikk¹ I l', any number may be employed, the cushioning may also be
controlled by a system of throttling.
The whole system may be rendered adjustable by a screw as shown.

page_text: •
COMPLETE SPECIFICATION.
An Improved Suction Valve for the Compression Pumps of Freezing
or Cooling Machines.
I JOHANN LEONHARD SEYBOTII, Chemist of Lindwurmstrasse 71/0, Munich
in the Kingdom of Bavaria, Empire of Germany, 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 freezing or cooling machines in which gas such as
ammonia is compressed to be subsequently expanded for the production of so called
cold, and it consists in an improved compression valve as hereinafter described and
illustrated in the drawing filed herewith.
The valve carries a piston d moving in a cylinder, this cylinder has three pairs..
of openings i, kk, ll' and the spindle is provided with corresponding holes so
that it may be turned by the hand wheel so as to open communication between
the space and the interior of the aforesaid cylinder through either the holes i i
kor. By this arrangement, the freedom of the spaces above and below the
piston d is closed sooner or later so that the stroke of the valve is made greater or
less and the speed of the machine controlled accordingly. The hand wheel his
provided with marks so that the indicator shows the position of the spindle b.
Gases escaping by the piston d failing to fit tightly may be compensated through
the valve c which is held in place by a very weak spring.
When the piston n moves in the direction of the arrow the valve g opens until
the underside of the piston d arrives level with the lower opened hole or or k¹
since the gas in the space / freely passes out into the spindle b and space m.
Further movement of the piston d causes the gas in the space to form a cushion
to stop the further opening of the valve J.
As the valve must move freely the piston d must not slide too tightly in
the cylinder, in practice therefore, and after the machine has been running some
time. the piston will leak, causing the cushioning to be less effectual. To avoid
inconvenience from this leaking the piston and cylinder are made small and the
openingskkarranged accordingly. When the valve g closes again, the
valve opens, allowing gas to pass very freely into the chamber while the piston
is cushioned above just before the valve g closes. The valve g may be closed by.a
spiral spring omitted from the drawing for the sake of clearness. A. valve similar
to e may also be provided to allow gas to freely enter the space above the
piston d, so that the valve may open freely even if the cushioning above the
piston shall have been defective. To provide for this second valve the body rin
two parts is provided on the rear side with a bore similar to that in which the
spindle is placed, said bore receiving the aforesaid valve similar to c.
In place
of three pairs of holes ikk', any number may be employed, the cushioning
may also be controlled by a system of throttling.
The whole system may be rendered adjustable by a screw o which lifts or lowers
the casing of the space and consequently raises or lowers the holes ikk
with regard to the valve seat o'. e is a passage from the inlet a to the space m..
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 Ị
claim is.
The improved valve having adjustable means for governing its action as herein
described
Dated this 17th day of August 1892.
HERBERT & Co.,
18, Buckingham Street, Strand, London, W.C., Agents to Applicant.
HERBERT & Co.,
18, Buckingham Street, Strand, London, W.C., Agents to Applicant.