Improvements in Screw-down Valves or Valve-spindles for Water Gauges and Analogous Purposes
Year: 1889

page_text: Date of Application, 22nd June, 1889
Complete Specification Left, 22nd Mar., 1890-Accepted, 26th Apr., 1890
PROVISIONAL SPECIFICATION.
Improvements in Screw-down Valves or Valve-spindles for Water
Gauges and Analogous Purposes.
I, GUSTAV JACOBY, of the firm of Gustav Jacoby & Co., Manufacturers, of
Bahnhofstrasse, Leipzig, Saxony, do hereby declare the nature of this invention
to be as follows:-
My invention relates to valves having an axially perforated screw spindle to allow a
passage for the fluid, when required for cleaning the water gauge, test valve, or other
appliance.
I provide the outer end of the hollow spindle with a short screw thread and a screw
cap which closes the perforation hermetically, when the latter is not required. The
axis of the screw thread and nut forms an angle with that of the spindle, so that the
fluid flowing out of the perforation may not come in contact with the screw threads,
or some of them, and that the nut need not be completely removed to afford a passage
for the fluid.
Between the inner face of the nut and the oblique face of the spindle, I insert a
packing ring, which, owing to its position, is not exposed to the stream of steam or
water flowing out of the aperture when the nut is screwed back.
FAIRFAX & WETTER,
433, Strand, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Screw-down Valves or Valve-spindles for Water
Gauges and Analogous Purposes.
I, GUSTAV JACOBY, of the firm of Gustav Jacoby & Co., Manufacturers, of
Bahnhofstrasse, Leipzig, Saxony, 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 :-
My invention relates to valves having an axially perforated screw spindle, to allow
a passage for the fluid, when required for cleaning the water gauge, test valve, or
other appliance, as illustrated by the accompanying drawing.
I provide the outer end of the hollow spindle d with a short screw thread and with
a screw cap m which closes the axial perforation k hermetically, when the latter is not
required. The axis of the said screw thread and nut or cap m forms an angle with
that of the spindle, so that the fluid flowing out of the perforation k may not come in
contact with the screw threads, or some of them, and that the nut need not be
completely removed to afford a passage for the fluid.
Between the inner face of the nut and the oblique face of the spindle, I insert a
packing ring, which owing to its position, is not exposed to the stream of steam or
water flowing out of the aperture when the nat is screwed back.
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 :-
A screw-down valve for water gauges and analogous purposes, having a hollow
valve spindle d provided with a screw-threaded projection or continuation and with a
screw-cap or nut m, the whole being arranged in such a manner, that the packing face

page_text: of the nut is out of the reach of the steam or water jet, and that the perforation k may
be laid bare by screwing back the nut m, without removing the same, substantially as
described.
Duh 1000
GUSTAV JACOBY.
By Fairfax & Wetter,
433, Strand, London, Agents.