Improvements in or appertaining to Stop Cocks, Taps, and other Valves, and in Washers therefor.
Year: 1897

page_text: Date of Application, 3rd Nov., 1897
Complete Specification Left, 30th July, 1898-Accepted, 3rd Sept., 1898
PROVISIONAL SPECIFICATION.
Improvements in or appertaining to Stop Cocks, Taps, and other
Valves, and in Washers therefor.
I, JOHN WATKINSON, of 48, Margaret Street, Everton, in the City of Liverpool,
Plumber, do hereby declare the nature of this invention to be as follows:-
This invention has for its principal object the construction of a washer or valve
or seat which shall be unaffected by steam, and shall remain water-tight for long
periods, and the invention consists in forming these portions or any of them of
vegetable ivory. The vegetable ivory previous to use is soaked for a few hours in
an oil or hydrocarbon. In my experiments I have found that oil of turpentine
is very useful for this purpose. It prevents the vegetable ivory from cracking
and disintegrating. I prefer at present to have a metallic surface and a vegetable
ivory surface, but it is possible that the two surfaces can be made of vegetable
ivory with advantage.
Improvements in or appertaining to Stop Cocks, Taps, and other
Valves, and in Washers therefor.
I, JOHN WATKINSON, of 48, Margaret Street, Everton, in the City of Liverpool,
Plumber, 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 has for its principal object the construction of a washer or valve
or seat which shall be unaffected by hot water, and shall remain water-tight for
long periods, and the invention consists in formning these portions or any of them
of vegetable ivory (the hard albuminous portion of the seeds of the Phytelephae
macrocarpa or Corosso nut). The vegetable ivory previous to use is soaked for a
few hours in an oil or hydrocarbon. In my experiments I have found that oil
of turpentine or petroleum oil is very useful for this purpose. It prevents the
vegetable ivory from cracking and disintegrating. I prefer at present to have a
metallic surface and a vegetable ivory surface, and have found from official tests
that taps made with a metallic face on a vegetable ivory seating, preferably a
vegetable ivory face on a metallic seating have stood hot water and steam in a
most extraordinary manner, better than any metallic materials that I have tried.
037

page_text: I have thoroughly tested the invention only for cocks up to now but my experi-
ments indicate that other small valves and washers or their valve seats can be
equally well made of vegetable ivory and that larger valves and seats can be
formed by making them accurately in parts pieced and cemented or otherwise
held together, the steam and hot water appearing to have no action upon this 5
material.
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:-
-
The manufacture of stop cocks and other valves or washers therefor by forming 1
of their wanting ourfence of vegetable ivory
Dated this 29th day of July 1898.
WM. P. THOMPSON & Co.,
Patent Agents,
Of Liverpool, Manchester, Birmingham, & London.