Improvements in Fire Hydrants and Stop Valves.
Year: 1895

page_text: Date of Application, 11th Apr., 1895-Accepted, 13th July, 1895
Improvements in Fire Hydrants and Stop Valves.
We THOMAS BLAKEBOROUGH and WALTER BLAKEBOROUGH of J. Blake-
borough & Sons Hydraulic Engineers Brighouse in the County of York, 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 has for its objects the providing of a watertight durable frictionless
packing for the spindles, and the fixing securely of the valve seats in the body of
the hydrant or stop valves, or combined air and stop valve.
First. The packing to the spindles is as follows, the spindle rotates on its
axis, and is provided with a collar at the bottom end, the cover or bonnet of the
hydrant or stop valves, is bored out for the spindle and fitted with two bushes
one each top and bottom forming a recess between them, the top bush fits the upper
part of the spindle, and the bottom bush is in the form of a disc, this disc impinges
against, and is ground to fit the collar on spindle.
The above named recess between the bushes is fitted with a best para vulcanized
rabber ring fitting the spindle and provided with or without feather edges.
An alternative method of packing enabling the hydrant or stop valves to be
repacked under pressure, is having the top part of the cover or bonnet of the
hydrant or stop valves, fitted with a bushed gland in lieu of the top bush and
having the above named recess bored out to suit the. rubber which is bat shaped
in this case, the gland is attached by bolts to the cover, the bush in the gland
projects at the bottom and the projection fits the recess above the rubber holding it
firmly in position.
Second. The fixing of the hydrant or stop valve seats is accomplished by
providing the gun metal ring (which forms the seat, and is recessed into the
body of the hydrant or stop valves) with one or more projecting lugs on
ench side.
The hydrant or stop valve body is provided with grooves one at least on each
side of the seat, in which the valve part slides, these grooves are lined with gun
metal, the before mentioned lugs on the seat project into the grooves on each side,
the seat is driven in prior to the groove linings, the groove linings are then driven
home upon the top of the lugs, thus firmly holding the seat in position.
An alternative method enabling this principle to be used in hydrants or stop
valves without grooves or guides to the top of the valve part is to construct the
valve seats with two three four more or less projecting lugs upon them these lugs
to be either parallel or tapered and having a corresponding number of projecting
lugs cast inside the hydrant or stop valve body, the seat is then forced in, and
partially turned on its axis so as to cause the taper lugs on the seat to pass under
the lugs in the body thus forcing the seat firmly down.
The foregoing being the nature and objects of this invention its application is
now described and illustrated reference being had to the annexed sheet of drawings
which are marked with letters and figures of reference corresponding with those
in the following explanation like letters being used to denote like parts throughout.
Fig. 1 shews sections of the hydrant or stop valve spindle, packing, body, &
cover.
A is the cover or bonnet bored for the box spindle B which is fitted with the
internal spindle and valve part, C. The bottom collar of box spindle, B, rests upon

page_text: the bridge piece, D. The bottom part of the cover A is fitted with the disc or
bush E and the top part with the bush F.
G. is the curved ring which fits tightly on the spindle, B, to keep grit out of the
packing H of best para rubber placed in the recess between the bushes E and F.
The bridge piece, D. rests upon the body L.
Fig. 2 shews an alternative method of packing enabling the packing to be applied
under pressure.
1, is the gland fitted with projecting bush J. and fitted to cover A with bolts, K.
H, is the bat shaped packing of best para rubber.
Fig. 3. shews section of valve and hydrant bodys with seat grooves, linings, and
lugs or projections.
L, is the valve or hydrant body with grooves for guiding the valve part, C.
N is the groove linings, M is the lugs on valve part, C, which slide in the
groove linings. O, is the seat with projecting lugs P. which fit under the guide
linings N.
Fig. 4 shews alternative design.
O, is the seat fitted with taper projecting lugs P. which fit under the projecting
lugs Q on body of valve or hydrant.
Having now described this invention, and ascertained its nature, and in what
manner the same is to be performed, we declare that what we claim as novel is
Firstly. The construction of the packing recesses and the mode of packing the
spindles with vulcanized rubber of the forms shewn, substantially as discribed and
in the manner shewn on the accompanying drawing Figs. 1 & 2 applicable to
hydrants, stop valves, and air valves having stop-valves.
Secondly. The construction of valve seats and bodies with projecting lugs cast
upon them of the forms shewn substantially as discribed and in the manner shewn
on the accompanying drawing Figs. 3 & 4, applicable to hydrants, stop-valves and
air valves having stop valves.
Dated this 10th day of April 1895.
THOMAS BLAKEBOROUGH.
WALTER BLAKEBOROUGH.