An Improved Clack-box for Pumps and Injectors.
Year: 1890

page_text: Date of Application, 24th Apr., 1890
Complete Specification Left, 16th Oct., 1890-Accepted, 22nd Nov., 1850
- PROVISIONAL SPECIFICATION.
An Improved Clack-box for Pumps and Injectors.
I, CHARLES FOURACRE, of 16 Oxford Terrace New Swindon, in the County of
Wiltshire, Engineer do hereby declare the nature of this invention to be as
ollows:-
My invention relates to an improved clack box for admitting water into locomotive,
marine and stationary boilers, and has for its object the prevention of choking while
in use, and easy removal and replacement under pressure of steam, which cannot be
done with any type of clack box as hitherto made and used.
In carrying out my invention I construct a metal box or receptacle, which in
shape and configuration may be similar to that of clack boxes now in general use,
with the exception that in the clack box according to my invention provision is
made for two valves and two seats, or one valve and one seat. The use of this
one seat and valve which is the novelty of the said invention and improvement is
that, the internal valve prevents any sediment or dirt from getting into the box
and choking the same, whereby the its action would be retarded and the How of
water to the boiler consequently stopped as would be the case with any type of
clack box hitherto adopted.
The aforesaid valve or valves together with the necessary springs and fittings
may be of any form or type of those generally made and used.
Dated this 19th day of April 1890.
FREDK. WALKER & HYDE,
4, Moorfields, Fore Street, London, E.C., Agents for the Applicant.
COMPLETE SPECIFICATION.
An Improved Clack-box for Pumps and Injectors.
1, CHARLES FOURACRE, of 16 Oxford Terrace, New Swindon, in the County of
Wiltshire, 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:—
My invention relates to an improved clack box and specially constructed valve for
admitting water at any low temperature into locomotive, marine and stationary
boilers, and has for its object the prevention of choking or clogging while in use,
and by the manner of its construction, easy of removal and replacement while
under pressure of steam.
In order that my invention may be more clearly understood I have furnished
an accompanying sheet of drawings in which similar letters of reference are used
to indicate corresponding parts throughout.
Fig. 1 is a side elevation of my improved clack box and valve as it would appear
when ready for fixing in position upon a boiler.
Fig. 2 is a view of the flange face with the valve head removed to shew the
construction of the apertures through which the water is fed to the boiler.
Fig. 3 is a vertical section of Fig. 1 and
Fig. 4 is a view of the under face of the bottom flange of Fig. 1.
In carrying my invention into effect I construct a box or receptacle A which
may be of copper, iron, gun or other metal, and in shape and configuration
externally may be similar to that of clack boxes in general use, but for the purposes
of illustration I have chosen to adopt the form of box shewn by Fig. 1. The mouth
of said box is provided with an internal screw thread a to receive the threaded
projection upon the flange B which screws thereinto. The formation of B is
DQ17

page_text: clearly illustrated by the front view Fig. 2 and the sectional view Fig. 3. The
projection upon the face thereof forms a seating for the valve D which has a
projecting spindle E fitting freely within the bore F of the flange B so that it
may slide therein. Suitable openings G are formed in B through which the water
is fed to the boiler. A spiral or other spring H is arranged upon E in such a
manner that one end thereof abuts against c within B, the opposite end against
a nut or nuts J screwed upon the spindle E the tension of H being to keep the
valve D in contact with its seating C, such tension being regulated by the adjust-
ment of J. Suitable bolt holes are provided in B for attaching it to a boiler at
any angle. A second flange L is formed upon B shewn more particularly by
Fig. 4, provided with bolt holes M for attaching it to the feed pipe of the pump
or other water supply.
The manner of attaching my invention to a boiler is as follows, that is to say,
The projection Cupon B fits into a hole made into the boiler to receive it and
is fastened in position by bolts and nuts, or studs passing through K and corre-
sponding holes in the boiler, suitable packing having been interposed between the
boiler and the flange B for the purpose of rendering it perfectly steam tight.
The box A is then screwed upon 6 and made steam tight in the usual way of
such joints generally. A projection d is formed upon the outside of A to receive
a spanner to facilitate the operation of screwing A close up to the flange B. I
may in certain cases form a screw thread upon the outer face of A ate where
necessary and provide a suitable nut to screw thereon to further strengthen the
junction of A and B. The manner of operation is as follows.
The flange L being connected to the supply pipe from the pump or other source,
the water is forced through N into A and through the apertures G to the boiler.
When the boiler is being fed while under the pressure of steam the force of water
must be in excess of said pressure and the tension of the spring H, so that the
valve D is forced from its seating and the water passed into the boiler, and it will be
understood that the force of water being in excess of the steam pressure, steam
cannot enter A during said feed, and when the supply of water ceases, or the force
thereof is reduced, the valve D is immediately forced, and retained, upon its seating
by the excess of pressure derived from the steam and the spring H, so that practically
no steam escapes during the operation. The spring H may appear to be superfluous,
but the object of this is, that when a cold boiler is being fed it prevents the return of
water to the clack box as would be the case if no power existed to retain the valve D
in its seating.
The salient point of my invention is that, no dirt or sediment can collect between
the valve D and its seating C, or enter the box A, and that where necessary the valve
can be repaired to a great extent while under steam, as by disconnecting A from the
supply and backing the nut that may be fitted at e and unscrewing A from B easy
access is obtained to G. e H, J or E and the greater the pressure of steam the safer the
operation, as the valve D will be kept the closer in contact with C, and to the best of
my knowledge and belief this cannot be done by any clack valve or feed water
injector hitherto made and used.
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
First In an improved clack box for pumps and injectors, the construction and use
of a box A in combination with a flange B having apertures G the spring Hand
nuts.J, with valve D and spindle E substantially as and for the purposes herein
described and shewn by the accompanying drawings.
Second-In an improved clack box for pumps and injectors the use and application
of a flange B constructed internally as shewn by Fig. 2, and G and c Fig. 3, and
provided with a valve D, and spindle E, operated by spring H and nuts J substan-
tially as and for the purposes herein set forth and shewn by reference to Fig. 3 of the
accompanying drawings.

page_text: Third In an improved automatic non corroding safety valve for steam and othe
boilers and engines, the construction, use and application of a flanged or other
casing B with apertures G, and central bore F, carrying a valve head D with
seating Cand spindle E, with spring H, and nuts J, substantially as described, and
shewn by the accompanying drawings.
Dated this 13th day of October 1890
GEO. THOS. HYDE,
4, Moorfields, Fore Street, London, E.C., Agent for the Applicant.