Year: 1888

page_text: Date of Application, 24th Nov., 1888
Complete Specification Left, 23rd Aug., 1889-Accepted, 26th Oct.,
1889
4th. The Spiral Spring.
1st. The Male or inside cone forms for part of its length the frustum of a cone, and
for the remaining part of its length proceeding from smaller end of cone, a cylinder,
having a thread cut for part of the length, on outside of cylinder, for inserting or
fixing tap or cock into pipe, boiler or other vessel. Through centre of male or inside
cone a passage is formed, parailel to outside, terminating near larger end of cone and
tapering therefrom to a square or other shaped hole in base for inserting a key to
screw tap or cock into pipe, boiler, or other vessel. Through side of cone a hole is
drilled in position to correspond with aperture in side, or in nosle of female cone
hereinafter described.
2nd. The Female or outside cone, both on inside and outside, forms for part of its
length the frustum of a cone, and for the remaining part, proceeding from larger end
of cone, a cylinder, and has a handle cast or fixed on outside, and a hole drilled in
side forming a nozzle, in position corresponding with hole in side of male cone
herein before described, for drawing off the steam, gas, water or other fluid. The
inside conical portion of the female cone is made to fit accurately over conical outside
portion of male cone, hereinbefore described, and the remaining cylindrical portion
has a thread cut on inside for screwing in cap hereinafter described.
3rd. The Cap is a cylinder with a thread cut on outside surface for screwing into
cylindrical end of female cone herein before described, and has a flange on one end
sufficiently large to overlap base of female cone forming a steam tight joint with end
of female cone, with a nut cast on outside for fixing spanner to screw cap into
position. The cylindrical portion of cap is made of such a length as will admit of
steam, gas, water or other fluid having access between base of male cone and the cap.
4th. The Spiral Spring is placed between base of male or inside cone and flange of
cap to assist pressure of steam, gas, water or other fluid, where such pressure is
inadequate to cause male and female cones to come into close contact.
To fix the tap or cock in pipe, boiler, or other vessel, the male or inside cone is
passed through the female or outside cone, and screwed into pipe, boiler, or other
vessel by means of a key inserted in square or other shaped opening in base of male
cone, after which the spiral spring is placed in position at base of male cone and the
cap is screwed into position in cylindrical end of female cone.
It will now be seen that when steam, gas, water, or other fluid is admitted into the
tap or cock, the pressure will act against inside of cap which being fixed to female or
outside cone will tend to force the female or outside cone over the male or inside cone,

page_text: thus causing the surfaces of both cones to come closely into contact with each other
and thereby preventing leakage of the steam, gas, water or other fluid from the said
tap or cock.
The Tap or Cock may be opened or closed by means of the handle cast or fixed on
the outside of the female or outside cone.
Dated this Twenty-third day of November 1888.
-
COMPLETE SPECIFICATION.
An Improved Tap or Cock.
We, JAMES ROBINSON and WILLIAM MURRAY, both of Penryn, in the County of
Cornwall, Engineers 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 an improved Tap or Cock, hereinafter described, wherein
the pressure of the steam, gas, water or other fluid is utilized in preventing the
leakage of the steam, gas, water, or other fluid from the said Tap or Cock; the said
Tap or Cock by having its passages comparatively large in proportion to the size of
the Tap or Cock used being specially adapted for try cocks, water gauge cocks, and
drain cocks for glass water gauges of steam boilers.
In order that our said Invention may be fully understood we shall now proceed to
describe the same, and shall refer to the annexed Sheet of Drawings comprising
figures 1, 2 and 3 representing respectively a Section, Elevation, and Sectional Plan,
and to the several parts of the same which we shall name as,
1st. The Male or inside Cone, lettered M, and Check Nut lettered N.
2nd. The Female or outside Cone lettered F.
3rd. The Cap, lettered C, and,
4th. The Spiral Spring lettered S.
1st. The Male or inside cone M forms for part of its length the frustum of a cone,
and for the remaining part of its length, proceeding from smaller end of cone, a
cylinder, having a thread cut on outside of cylinder, for inserting and fixing tap or
cock into pipe, boiler, or other vessel, and for check nut N for preventing Male
cone M from unscrewing after being fixed. Through centre of Malo or inside cone
a passage is formed, parallel to outside, terminating near larger end of cone and
tapering therefrom to a square or other shaped hole in base for inserting a key to
screw tap or cock into pipe, boiler, or other vessel. Through side of cone a hole is
drilled in position to correspond with aperture in side or in nozzle of Female cone
hereinafter described.
2nd. The Female or outside cone F, both on inside and outside, forms for part of
its length the frustum of a cone, and for the remaining part, proceeding from larger
end of cone, a cylinder, and has a handle cast or fixed on outside, and a hole drilled
in side forming a nozzle, in position corresponding with hole in side of Male cone
hereinbefore described, for drawing off the steam, gas, water or other fluid. The
inside conical portion of female cone is made to fit accurately over conical outside
portion of male cone hereinbefore described, and has one or more shallow grooves
or chambers g formed in same, and the remaining cylindrical portion has a thread cut
on inside for screwing in cap hereinafter described.
3rd. The Cap C is a cylinder with a thread cut on outside surface for screwing into
cylindrical end of female cone hereinbefore described, and has a flange on one end
sufficiently large to overlap base of female cone, forming a steam tight joint with end
of female cone, with a nut cast on outside for fixing spanner to screw cap into
position. The cylindrical portion of cap is made of such a length as will admit of
steam, gas, water or other fluid having access between base of male cone and
the cap.

page_text: 4th. The Spiral Spring S is placed between base of male or inside cone and flange
of cap to assist pressure of steam, gas, water or other fluid, when such pressure is
inadequate to cause male and female cones to come into close contact.
To fix the tap or cock in pipe, boiler or other vessel, the male or inside cone M is
passed through the female or outside cone F, and the check nut N screwed on the
male cone M. The male cone M is then screwed into pipe, boiler or other vessel by
means of a key inserted in square or other shaped opening in base of male cone, and
the check 'nut is then screwed tightly against pipe, boiler, or other vessel, after
which the spiral spring is placed in position at base of male cone and the cap is
screwed into cylindrical end of female cone.
It will now be seen that when steam, gas, water or other fluid is admitted into the
tap or cock, the pressure will act against inside of cap which being fixed to female or
outside cone will tend to force the female or outside cone over the male or inside cone,
thus causing the surfaces of both cones to come closely into contact with each other
and thereby preventing leakage of the steam, gas, water or other fluid from the said
Tap or Cock.
The Tap or Cock may be opened or closed by means of the handle cast or fixed on
the outside of the female or outside cone.
Having now particularly described and ascertained the nature of our said
Invention and the manner in which the same is to be performed we declare that
what we claim is :
The improved arrangements, combination and application of the Male and Female
Cones, Cap, Check Nut and Spiral Spring, also the arrangement of passages and
chambers in and through the said cones, for the purpose before described and
represented in the drawings.
Dated this Twenty-first day of August 1889.
JAMES ROBINSON.
WILLIAM MURRAY.