IMPROVEMENTS CONNECTED WITH VALVES FOR STEAM AND OTHER MOTORS
Year: 1883

page_text: PROVISIONAL SPECIFICATION left by George Temple at the Office of the
Commissioners of Patents on the 12th November 1883.
"IMPROVEMENTS IN AND
GEORGE TEMPLE of Sheffield in the County of York
CONNECTED WITH VALVES FOR STEAM AND OTHER MOTORS,"
This Invention relates to valves for steam motors, hydraulic motors, compressed
air motors and other similar motors
This Invention consists in an improved construction of so-called "balance slide
valves" in which the said valves are relieved of the pressure over and above that
which is absolutely necessary to make them steam tight
According to one method of construction applicable to single cylinder steam
motors, the valve is box shaped with internal flanges, instead of external flanges
as ordinarily made, upon the back of this valve is a loose face plate which is
longer than, and of greater superficial area than, the box-shaped valve. This
plate has a lug or lugs to which is attached a rod, this rod passes through a hole in
the steam chest cover; on the back of the steam chest cover is a flanged ring or
tray containing a ring or hollow frame of elastic material such as india rubber or
its equivalent; a flanged plate surmounts the said elastic ring through which the
aforesaid rod passes, and to which it is secured by a nut and washer. A spring is, or
springs are, placed between the valve plate or face plate and the steam chest cover,
by which the valve is pressed on to the valve face of the cylinder when the steam is
shut off. The superficial area of the outer flanged plate, which is exposed to the
action of the steam, is less than that of the valve plate. The valve slides against
the face plate, or valve plate and the said face plate is held from sliding by studs
or brackets on the steam chest cover.
The steam on being admitted into the steam chest exerts pressure on the valve
plate to force the valve on to the valve face, and in an opposite direction on the
under side of the plate, outside the steam chest, to force the valve off the valve face,
thus relieving the valve of pressure in proportion to the difference of area of the
Baid outer plate and said valve plate.
As a modification a cylinder with an external flange is formed with or fitted to
the outer side of the steam chest cover, the elastic block of india rubber or its
equivalent is bolted or secured to the flange by means of a ring or frame-flanged
or otherwise which covers or protects it; to the under side of the elastic block-

page_text: in the cylinder-and to the upper side of the said block-above the cylinder-is
secured a metal plate, the two plates and elastic block being secured together by
set screws; the rod which is secured to the valve plate, or face plate, is chased or
screwed at its outer end and passes through the elastic block and the upper and
under plate, and is adjustable by nuts against the said upper and under block.
The valve and valve plate or face plate are of similar construction in this
modification as in the arrangement firstly described.
The essential features of this Invention, consisting of the box valve with internal
flanges, loose valve plate, or face plate, with rod and block, acting on an elastic
ring or elastic block, can be applied in various ways to different descriptions of
motors without departing from the principles of my Invention