Improvements in Check Valves.
Year: 1892

page_text: Date of Application, 21st June, 1892-Accepted, 6th Oct., 1892
COMPLETE SPECIFICATION.
Improvements in Check Valves.
I, MATHEW LASPEYRE, of 124 South Water Street, Philadelphia, in the
State of Pennsylvania, United States of America, Gentleman, 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 check-valves, and it has for its object to provide an
improvement in check valves which are particularly adapted for use in connection
with feeding devices for steam boilers, and the main and essential object of the
invention is to provide a check-valve used in connection with an auxiliary wing
valve and cooperating with the same so as to automatically close the feeding of the
water into the boiler when the check has become defective or out of order, until the
defect is remedied.
This is what is commonly called by engineers as sticking. It is to facilitate
fixing the check and aiding the operation of the same.
With these and many other objects in view which will readily appear as the
nature of the invention is better understood, the same consists in the novel
construction, combination and arrangement of parts hereinafter more fully described,
illustrated and claimed.
In the accompanying drawings:-
Fig. 1 is a sectional view of a portion of a boiler having connected therewith a
feeding check and auxiliary valve constructed in accordance with my invention.
Fig. 2 is an end view of the auxiliary valve.
Referring to the accompanying drawings, A represents the check-valve casing
located in the line of pipe feeding water to the boiler B which boiler is provided
with a threaded perforation b, which receives the threaded neck C extending from
the check valve casing A. The said check-valve casing A is provided with a
transverse perforated valve guide D the valve seat E and the top opening F, which
is enclosed by the cap G adapted to be removed for the purpose of gaining access
to the valve to clean out any obstruction that may have been lodged in the way of
the check-valve H. The check-valve H works over and upon the seat E, and had
neck C is provided with an outer bevelled end K which snugly receives the auxiliary
valve K¹ fitting therein when closed. The said auxiliary valve is provided with an
elongated winged stem L fitting and working within the threaded neck C of said
valve casing A. The said winged valve stem L is provided with a longitudinally-
disposed slot M, which works over the fixed pin or bolt N, passing therethrough
and through said threaded neck. This prevents the valve K' from passing into the
boiler under the pressure of the water and also gives to the said valve the necessary
lift in order that the water may pass freely into the boiler after leaving the check.
It will be readily seen that while the check valve H is working freely, the
pressure of the water keeps the auxiliary valve open and allows the water to pass
therearound into the boiler. The auxiliary valve throws the water in a circle into
the boiler and thus scatters the same away from the flues and prevents the usual
contraction of the same. In case the check valve should stick or become clogged
the inside pressure of the steam and water will close the auxiliary valve and
thereby exclude all steam and water from the check valve which thus allows the
cap G to be removed and the valve readily cleaned out.
the stem I working through the transverse valve guide
The construction and operation of the herein-described check valve are thought
to be apparent without further description.

page_text: 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. The combination with a capped valve casing having an extended neck, a
check valve mounted in said casing and an auxiliary valve working in said neck,
substantially as set forth.
2. The combination of the valve casing having an extended neck adapted to be
secured to a boiler, a check valve working in the body of the casing, and a winged
auxiliary valve having the stem thereof working in said neck and adapted to work
over the end of the neck within the boiler, substantially as set forth.
3. A valve casing having a central valve guide a top perforation directly over
said valve guide, and an extended neck adapted to be secured in one side of the
boiler, the check valve moving in said guide, the removable cap enclosing said top
opening, and an auxiliary valve working over the end of said neck within the
boiler and having a winged stem moving within said neck, substantially as
set forth.
4. The combination of a capped valve casing having an extended neck provided
with an outer bevelled end adapted to be secured in one side of a boiler, a check
valve mounted in the body of the casing, an auxiliary valve having a winged stem
moving in said neck and provided with a longitudinally-disposed slot, and a fixed
limiting pin secured in said neck and passing through said slot, substantially as
set forth.
Dated this 21st day of June 1892.
W. P. THOMPSON & BOULT,
Agents for the Applicant.