Year: 1886

page_text: Date of Application, 3rd Apr., 1886.
Complete Left, 30th Dec., 1886.
Complete Accepted, 1st Feb., 1887.
1, JOHN GEORGE KINGHORN of Water Street Liverpool in the County of Lancaster
Engineer do hereby declare the nature of this invention to be as follows:-
The object of this invention is to provide a valve simple and cheap of construction,
effective in operation and not liable to get out of order for pumps of different con-
struction, such as the air pumps of steam engines.
It consists of a valve known as a dead lift valve constructed of a number of layers
or discs placed one over the other. Each layer or disc is free to move on the central
stud, independently of the others. The bottom and intermediate layers may be per-
forated with a number of holes these being so placed that when all the layers or discs
are close together no passage way through is formed. As the valve opens, the discs
or layers open simultaneously or independently lifting on the central stud, and
separate, allowing particles of air or water to pass in between them, these particles act
to cushion the impact, on the valve striking the guard or seat. The sound caused
thereby will be considerably less than from an ordinary metallic valve of equal weight.
The holes in the layers facilitate the entrance of the air or moisture between them, and
also act as passages for the air or water to pass through, providing a greater area,
without lifting the valve so far off its seat, as is the case with ordinary dead lift valves,
and where the pressure is less at one time than at another, the bottom layer may at
times remain on its seat, the upper ones only lifting. Where a quick closing action
is required, a spiral or other spring is fitted to the central stud, this acting on the top
layer forces it back the whole or part way to its seat, as soon as the pressure on the
other side of the valve is removed. A guard is placed on the central spindle affixed
thereto by means of screw or nut to regulate the lift of the valve. On the under-
side of this guard is cut a recess to receive the spring, which preferably abuts against
a small cup washer sliding on the stud. The discs or layers of which the valve is
composed may be made of any suitable incorrodible wear resisting material, preferably
of hard phosphor bronze or similar metal. The valves are of course opened and
closed by suction or pressure, and the grids or seats are constructed with bars and
openings in the usual form.
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool,
Patent Agents for the Applicant.

page_text: Improvements in Valves for Air-circulating, Air-compressing, and
other Pumps.
=
I, JOHN GEORGE KINGHORN, of Water Street, Liverpool, in the County of Lancaster,
Engineer, 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 this invention is to provide a valve for pumps, such as the air pumps
of steam eirgines, simple and cheap of construction, effective in operation, and not
liable to get out of order.
It consists in constructing what is known as a dead lift valve of a number of. layers
or discs placed one over the other, each being free to move independently of the others
on the central stud, and having the bottom and intermediate layers or discs, plain or
perforated with a number of holes, in each, through which, when the valve is open, air
or water may pass.
Referring to the drawings:--
Figure is an elevation partly in section, of valve constructed according to my
invention.
Figure 2 plan of Figure 1.
Figure 3 similar valve fitted with spring to quickly return it to its seat.
Figure 4 plan of Figure 3.
In these, A is the valve seat of ordinary construction, B the guide pin, C the guard,
1) the valve consisting of a number of layers or dises E, F, G, superimposed one
above the other. These are preferably made of a tough flexible, incorrodible, wear
resisting metal, such as phosphor bronze, gun metal or the like, though other material
may be employed. Each layer or disc is free to move on the central guide pin or
stud B independently of the others. The bottom and intermediate layers may be per-
forated with a number of holes d so placed that when all the layers or discs are close
together, no passage way through is formed. As the valve D opens the discs or
layers E, F, G, open simultaneously or independently, lifting on the central guide pin
or stud, and separate, allowing particles of air or water to pass in between them, these
particles act to cushion the impact when the valve strikes the guard or seat. The
sound caused by the striking will be considerably less than from an ordinary metallic
valve of equal weight. The holes d in the discs facilitate the entrance of the air or
moisture between them, and also act as passages for the air or water to pass through,
providing a greater area, without lifting the valve so far off its seat, than is the case
with ordinary dead lift valves, and where the pressure is less at one time than at
another, the bottom layer may at times remain on its seat, the upper ones only lifting.
Where a quick closing action is required a spiral or other spring His fitted to the
central guide pin or stud B. This acts on the top disc forcing it back the whole or
part way to its seat, as soon as the pressure on the other side of the valve is removed.

page_text: The guard is fixed on the central guide pin or stud B, by means of screw or nut 1,
and regulates the lift of the valve. On the underside of this guard is cut a recess c to
receive the spring which preferably abuts against a small cup washer h, sliding on the
stud.
The layers or discs of the valve being made of a thin and elastic metal, the bottom
layer easily accommodates itself to its seat, under but a slight pressure, even should
the seat be somewhat irregular or uneven, and further, the valves being cushioned the
impact is so little it does not tend to crystallize the studs as is the case with solid dead
lift valves.
Having now particularly described and ascertained the nature of the said invention,
and in what manner the same is to be performed, I declare that what I claim is :
1. A dead lift valve for air pumps and the like formed of a number of discs or layers
of a thin elastic material lifting on a central pin or stud with or without holes in them
to allow of the passage of air or water through them.
2. In a dead lift valve formed of a number of discs or layers, the use or combination
of a spring to cause it to quickly return to its seat, substantially as described.
3. A dead lift valve formed and constructed, substantially as described and shewn.
WM. P. THOMPSON & Co.,
6, Lord Street, Liverpool,
Agents for the Applicant.
WM. P. THOMPSON & Co.,
6, Lord Street, Liverpool,
Agents for the Applicant.