Improvements in Slide Valves.
Year: 1896

page_text: Date of Application, 15th Feb., 1896
Complete Specification Left, 26th Oct., 1896-Accepted, 28th Nov., 1896
PROVISIONAL SPECIFICATION.
Improvements in Slide Valves.
I, RICHARD ELTZ, of Theaterstrasse 66, Chemnitz, in the German Empire,
Engineer, do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in equilibrated slide valves.
One of the chief disadvantages connected with equilibrated slide valves of the
kind hitherto employed is the necessity for employing packing rings or the like
and springs which only allow the steam to act on a limited portion of the surface
of the valve and to cause it to press against the valve seat.
The practical utility of these arrangements is detracted from because in order to
thus reduce the area of the valve acted on by the steam too many devices are
used each of which it is difficult to keep in working order.
According to this invention I provide a much simpler device for equilibrating
valves, that is to say, I employ an elastic tube, such as for instance, a corrugated
tube, one end of which is provided with a pad or cushion. The said tube is either
attached to the back of the valve in such a manner that the pad or cushion slides
on the valve chest cover, or it is attached to the valve chest cover and arranged
so that the pad or cushion slides on the back of the valve. The elastic tube
possesses sufficient elasticity to ensure a durable tight joint.
Dated the 15th day of February 1896.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
I, RICHARD ELTZ, of Theaterstrasse 66, Chemnitz, in the German Empire,
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:-
This invention relates to improvements in equilibrated slide valves.
One of the chief disadvantages connected with equilibrated slide valves of the
kind hitherto employed is the necessity for employing packing rings or the like
and springs which only allow the steam to act on a limited portion of the surface
of the valve and to cause it to press against the valve seat.
The practical utility of these arrangements is detracted from because, in order to
thus reduce the area of the valve acted on by the steam, too many devices are
used each of which it is difficult to keep in working order.
According to this invention I provide a much simpler device for equilibrating
valves, that is to say, I employ an elastic tube, such as for instance, a corrugated
tube, one end of which is provided with a pad or cushion. The said tube is either
attached to the back of the valve in such a manner that the pad or cushion slides
on the valve chest cover, or it is attached to the valve chest cover and arranged
so that the pad or cushion slides on the back of the valve. The elastic tube
possesses sufficient elasticity to ensure a durable tight joint.
D

page_text: To enable my invention to be fully understood I will describe it by reference to
the accompanying drawing, in which :-
Figure 1 is a vertical section of a Rider valve gear having my improvements applied
thereto :
Figure 2 is a sectional plan of the same.
The metal corrugated tube a is connected at one end to the back of the valve S
by a steam tight joint and at the other end to a pad or cushion a' also by a steam
tight joint, the said pad or cushion being adapted to slide on the cover D of the
steam chest.
When the valve S moves the pad a¹ also moves preserving a steam tight joint on
account of the elasticity of the corrugated tube.
The arrangement can be modified by attaching one end of the corrugated tube a
to the cover of the valve chest by a steam tight joint whilst the pad af is attached
to the other end of the tube so that the back of the valve slides on the same.
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 :-
1. In slide valves the employment of an elastic tube, such as a corrugated tube,
having at one end a pad or cushion which, according as the other end of the
corrugated tube is connected to the back of the valve or to the cover of the valve
chest, slides on the latter or on the former when the valve moves, substantially as
described.
2. The manufacture and use of the improved equilibrated slide valve herein before
-described and illustrated in the accompanying drawing.
Dated the 26th day of October 1896.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.