Apparatus for Regulating the Flow of Volatile Liquid in Refrigerating Machines.
Year: 1892

page_text: Date of Application, 3rd Aug., 1892
Complete Specification Left, 26th Aug., 1892-Accepted, 1st Oct., 1892
PROVISIONAL SPECIFICATION.
[Communicated from abroad by GESELLSCHAFT FÜR LINDES EISMASCHINEN,
of Wiesbaden, Germany, Manufacturers.]
Apparatus for Regulating the Flow of Volatile Liquid in
Refrigerating Machines.
I, THOMAS BELl Lightfoot, of 35 Queen Victoria Street, in the City of
London, Engineer, do hereby declare the nature of this invention to be as
follows:-
In Thomas Bell Lightfoot's Specification No. 7712 of 1892, is described
apparatus for regulating the flow of volatile liquid from the condenser to the
vaporiser of a refrigerating machine; the present invention relates to improved
apparatus of this kind, arranged to supply from the one condenser a number of
vaporisers each with an equal quantity of the volatile fluid at equal intervals.
The improved apparatus consists of a cylindrical valve chamber having an inlet
at the bottom from the condenser, and having a number of lateral outlets radiating
from it to separate vaporisers. Within this chamber a hollow cylindrical plug
open at the bottom is caused to revolve, its spindle being extended up through a
stuffing box and carrying a pulley or chain wheel driven from some suitable
revolving part of the refrigerating machine. Through one side of the plug there
is a slit or aperture which, as the plug revolves, presents itself to the several
outlets successively, so that fluid from the condenser passes to the vaporisers with
which the outlets communicate, the quantity delivered to each being the same, as
the slit of the plug occupies the same time in passing each outlet.
regulate that quantity, the plug can be raised or lowered by means of an external
hand wheel, working in a stationary nut a screw engaged between collars on the
spindle of the plug, the passage through the aperture of the plug to the vaporisers
being thus more or less throttled.
Dated this 2nd day of August 1892
In order to
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Apparatus for Regulating the Flow of Volatile Liquid in
Refrigerating Machines.
I, THOMAS BELL LIGHTFOOT of 35 Queen Victoria Street, in the City of
London, Engineer, 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 :-
In my Specification No. 7712 of 1892 is described apparatus for regulating the
flow of volatile liquid from the condenser to the vaporiser of a refrigerating
machine; the present invention relates to improved apparatus of this kind wherein
the valve chamber is kept continuously in communication with the condenser, and
which is more particularly adapted to supply, from the one condenser, a number of
vaporisers each with an equal quantity of the volatile fluid at equal intervals.
I will describe the construction of the said apparatus with reference to the
accompanying drawings, in which
Fig. 1 shews a vertical section and Fig. a sectional plan of an arrangement
adapted to supply six vaporisers with volatile liquid.
A cylindrical valve H, which is rotated by means of a pulley or pitch wheel R
Prine Rd7

page_text: and belt or chain from the compressing engine, revolves in the chamber V of a
casing G the lower end of which chamber is connected by a pipe Le with the
condenser for the volatile liquid. The valve H has on its periphery a wedge
shaped slot H which, on the rotation of the valve, consecutively establishes a
communication between the part of the chamber V below the latter and a series of
passages K and pipes Lv leading to the several vaporisers. As soon as one of
these communications is established, the volatile liquid will pass from pipe Lc
through chamber V and one or other pipe Lu to one of the vaporisers, in conse-
quence of the pressure existing in the condenser being greater than that in the
vaporiser, such passage of liquid continuing as long as the slot in the valve
maintains the orifice of the passage K open.
If the openings of the passages K in the valve chamber V are all perfectly
uniform in size, it will be seen that with a uniform rotation of the valve, each
passage K will receive exactly the same quantity of liquid, and consequently each
vaporiser will be automatically supplied with the same quantity. This is an
advantage which cannot be obtained with the usual mode of regulating the
supply.
In order to vary, according to requirements, the quantity of liquid supplied at
one time to each vaporiser by the above described means, the valve H is moved
longitudinally in the chamber V so as to bring a different part of its wedge-shaped
slot opposite the openings of the passages K, thus varying in a corresponding
manner the sectional area of the orifice through which the liquid flows into the
passage. In the arrangement shewn on the drawing such longitudinal adjustment
of the valve is effected by a tubular screw S through which passes the valve
spindle, and which screws into a threaded socket T on the valve casing, the screw
Eeing turned by a hand wheel S. Collars being fixed on the valve spindle at each
end of the screw, the valve spindle will be raised or lowered by turning the screw
in one direction or the other.
When the valve H is screwed down to its lowest position, as shewn on the
drawing, the apex of the slot H' is below the bottom of the openings of the
passages K, and consequently the supply of liquid will be entirely cut off from all
the vaporisers.
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
1. In apparatus for regulating the flow of volatile liquid, a valve H revolving in
a chamber communicating at one point continuously with the condenser of volatile
liquid while at one or more other points it communicates with passages leading to
one or more vaporisers, these passages being controlled by the rotating valve in
such manner as to be thereby put consecutively into direct communication with the
supply of volatile liquid, so as to supply cach vaporiser with a definite and equal
quantity of volatile liquid substantially as described.
2. In apparatus for regulating the flow of volatile liquid such as is referred to
in the preceding claim, effecting the communication between the supply of volatile
liquid and the passages leading to the vaporisers by means of a tapering slot
formed in the rotating valve, and arranging the latter to be adjustable longi-
tudinally in order to vary the position of the slot relatively to the passages leading
to the vaporisers, substantially as described.
Dated this 26th day of August 1892.
ABEL & IMRAY,
Agents for the Applicant.