Improvements in Water Tube Steam Boilers.
Year: 1890

page_text: Date of Application, 2nd Oct., 1890
Complete Specification Left, 2nd July, 1891-Accepted, 8th Aug., 1891
PROVISIONAL SPECIFICATION.
Improvements in Water Tube Steam Boilers.
We, THE MILLS PATENT SECTIONAL BOILER COMPANY, LIMITED, of
Manchester, in the County of Lancaster Engineers and Boiler Makers, and
JOHNSON MILLS Manager of the said Company do hereby declare the nature of
this invention to be as follows
The improvements which are the subject of this invention relate to the con-
struction of water tube steam boilers, and consist in the employment of binding
straps or stays for the purpose of efficiently securing and binding together the mud
drum, the rear header, and the steam and water drum, and in like manner the front
header and the steam and water drum, in order to prevent the possibility of the end
circulating tubes or nipples being pressed off, or out, and becoming disconnected
from the header, or from the mud drum, or from the pocket connecting the
circulating tubes to steam and water drum, in consequence either of internal
pressure, or through any fault in crection.
In this invention, in addition to the connection between the steam and water
drum, and the mud drum which is afforded by the rear end circulating tubes or
nipples, we also connect the rear end of steam and water drum by means of straps
or rods. If straps are employed they may pass over or round either the steam and
water drum, and the mud drum, or both. These straps may be tightened by a right
and left hand screw thread formed at the connection or ends of said straps."
If rods are employed, we place either a transverse bar across the upper side of
steam and water drum, or we attach brackets to side of said drum. We also attach
brackets to the upper side or end of mud drum. To the upper or lower of each of
the aforesaid brackets we attach a rod terminating with either an eye, or a hook, to
which a connecting rod is attached the end of this connecting rod we form with a
screw bolt which we pass through one of aforesaid brackets: by tightening the nuts
on the screw bolts of these connecting rods, the mud drum is additionally suspended
or supported, and the rear end circulating tubes or nipples are by these means
effectually prevented from being disconnected as herein before described.
The aforesaid stays may if preferred be formed in two parts at rear end of
boiler, by severally connecting the header with the steam and water drum, and the
header with the mud drum. We employ stays or straps similar to those herein
before described in order to prevent the front header being disconnected from the
steam and water drum, in consequence of internal pressure or through any fault in
erection.
THOMAS PRESCOTT,
53, Arcade Chambers, St. Mary's Gate, Manchester, Agent for Applicants.
COMPLETE SPECIFICATION.
Improvements in Water Tube Steam Boilers.
We, THE MILLS' PATENT SECTIONAL BOILER COMPANY, LIMITED, of
46 Victoria Buildings, St. Mary's Gate Manchester, in the County of Lancaster
Engineers and Boiler Makers, and JOHNSON MILLS, Manager of the said
Company 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 improvements which are the subject of this invention relate to the

page_text: Construction of water tube steam boilers, and consist in the employment of binding
straps or stays, for the purpose of efficiently securing and binding together the mud
drum, the rear header, and the steam and water drum and in like manner the front
header and the steam and water drum, in order to prevent the possibility of the end
circulating tubes or nipples being pressed off, or out, and becoming disconnected
from the header, or from the mud drum, or from the pocket connecting the
circulating tubes to steam and water drum, in consequence either of internal
pressure or through any fault in erection.
In this invention, in addition to the connection between the steam and water
drum, and the mud drum which is afforded by the rear end circulating tubes or
nipples we also connect the rear end of steam and water drum by means of straps
or rods. If straps are employed they may pass over or round either the steam and
water drum, or the mud drum, or both. These straps may be tightened by a right
and left hand screw thread formed at the connection or ends of said straps. If rods
are employed we place either a transverse bar across the upper side of steam and
water drum, or we attach brackets to side of said drum.
We also attach brackets to the upper side or end of mud drum.
To the upper or lower of each of the aforesaid brackets we attach a rod
terminating with either an eye, or a hook to which a connecting rod is attached:
the end of this connecting, rod we form with a screw bolt which we pass through
one of aforesaid brackets. By tightening the nuts on the screw bolts of these
connecting rods, the mud drum is additionally suspended or supported, and the rear
end circulating tubes or nipples are by these means effectually prevented from
being disconnected as herein before described.
The aforesaid stays may if preferred be formed in two parts at rear end of boiler
by severally connecting the header with the steam and water drum, and the header
with the mud drum.
We employ stays or straps similar to those herein before described in order to
prevent the front header being disconnected from the steam and water drum in
consequence of internal pressure or through any fault in erection.
In the accompanying drawings our invention is shown applied in the form
of rods.
Fig. 1 represents side view of a portion of a boiler and Fig. 2 an end view of
the same.
In these drawings a is the steam and water drum, the inclined tubes forming
boiler, c the rear end tubes forming the connection between the pocket h, the
header and the mud drumj: d the stay rods or ties which bind together the
pocket attached to end of steam and water drum a, the header g, and the mud
drumj e the brackets attached to or forming part of the pocket h and the mud
drum the eyes on end of tie rods d, which are connected to eyes on centre
brackets k, said brackets being attached to the sides of header g: d' are nuts for
tightening the tie rods d.
Having now particularly described and ascertained the nature of this our said
invention and in what manner the same is to be performed we declare that what we
claim is :-
In water tube steam boilers the use of binding straps or tie rods to bind together
the mud drum, the rear header, and the steam and water drum, and in like manner
the front header and the steam and water drum, for the purpose and in the
manner substantially as herein before described.
Dated this 1st day of July 1801
THOMAS PRESCOTT,
53, Arcade Chambers, St. Mary's Gate, Manchester, Agent for Applicants.