Improvements in Screw Down Cocks or Valves for Steam, Water, and other Liquid or Fluid.
Year: 1893

page_text: Date of Application, 8th May, 1893
Complete Specification Left, 5th Feb., 1894-Accepted, 31st Mar., 1894
PROVISIONAL SPECIFICATION.
Improvements in Screw Down Cocks or Valves for Steam, Water,
and other Liquid or Fluid.
I, WILLIAM HENRY FOSTER, of the Firm of Edward Foster and Son, Central-
Brass Works, Halifax, in the County of York, Brass Founders and Finishers,
do hereby declare the nature of this invention to be as follows :-
The object of my invention is to construct and arrange a perfectly water and
steam tight valve on the screw down principle.
In constructing a valve according to my invention the central spindle which
works the valve up and down is separate from the handle or wheel but it is
nevertheless operated up and down by the said handle or wheel. The spindle is
inserted in a socket lined with leather which forms a packing and the spindle
is also packed near its lower end to prevent the escape of steam or water.
By this means the spindle always maintains a perfectly vertical position so
that the pressure of the valve upon the seating is equal and as the central spindle
does not work up and down in a nut as is usual there is less liability to wear and
get slack and out of truth.
Dated this 6th day of May 1893.
TASKER & CROSSLEY,
Halifax, Agents.
COMPLETE SPECIFICATION.
Improvements in Screw Down Cocks or Valves for Steam, Water,
and other Liquid or Fluid.
I, WILLIAM HENRY FOSTER, of the Firm of Edward Foster and Son, Central
Brass Works, Halifax, in the County of York, Brass Founders and Finishers,
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 :-
The object of my invention is to construct and arrange a perfectly water and
steam tight valve on the screw down principle.
In constructing a valve according to my invention the central spindle which
works the valve up and down is separate from the handle or wheel, but it is
nevertheless operated up and down by the said handle or wheel. The spindle is
inserted in a socket provided with leather which forms a packing and the spindle
is also packed near its lower end to prevent the escape of steam or water.
In order that my invention may be more clearly understood I will make
reference to the accompanying drawing which is a cross section of my improved
screw down tap or cock wherein A represents the valve spindle secured by screw B
to a cap C provided with a handle D which in some cases will take the form of a
hand wheel. The cap C is made with internal screw threads and fits on to the
barrel E so that when the handle D is turned so as to raise or lower the screwed
cap C the spindle A is also raised or lowered accordingly whereby gas, water
or steam is admitted or shut off. The upper end of the spindle is suitably packed
at F, whilst the lower end of the spindle is packed at G working in chamber G
The valve H which is provided with a leather washer I fits upon the seating J
and is made with a vertical spindle entering an opening formed in the spindle A.

page_text: By this construction of screw down valve there is very little wear and tear
upon the spindle as it always maintains a perfectly vertical position.
It will also be observed that the central spindle A does not work up and down
in a nut as is usual in screw down valves and as the cap C is provided with a full
number of screw threads on the barrel E there is no possibility of the thread
stripping which with ordinary taps is a constant source of trouble.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
Firstly. In a screw down cock or valve having a vertical spindle A and screw
cap C for operating the said vertical spindle, the combination therewith of
packings F and G and chamber G¹
Secondly. In a screw down cock or tap having a vertical spindle A and screw
cap C for operating same, and packing F'and G, the combination therewith of the
loose valve H, all arranged as described.
Dated this 1st day of February 1901
TASKER & CROSSLEY,
Halifax, Agents.