Improvements in Steam and Water Drums, and in their Application to Water Tube Steam Boilers.
Year: 1889

page_text: Date of Application, 18th July, 1889
Complete Specification Left, 18th Nov., 1889-Accepted, 21st Dec., 1889
PROVISIONAL SPECIFICATION.
Improvements in Steam and Water Drums, and in their Application
to Water Tube Steam Boilers.
I, JOHNSON MILLS of High Green Villa, Prestwich in the County of Lancaster
Engineer do hereby declare the nature of this invention to be as follows:-
The improvements which are the subject of this invention relate to the formation of
the front end plates of steam and water drums in water tube steam boilers, and the
object of this invention is to construct the pockets to which the front headers of tubes
are connected, in a manner that said pockets may form part of front end plate and
also allow space for a greater number of nipples than ordinary to be employed for
connecting the headers to said pockets.
In this invention I construct a pocket in combination with the front end
plate of a steam and water drum in the same manner as that which I have
described in my invention dated August 31st A.D. 1888 and numbered 12545 for the
rear end plate of a steam and water drum, by shaping and bending a plate of mild
steel or other suitable material to the required form and either rivetting or welding
the joints this end plate may either be dished or may be flat. I connect the front
headers of tubes to aforesaid pocket by means of either vertical, inclined or horizontal
nipples. These nipples are arranged as to number and size to suit the number of
inclined tubes entering into the headers. By the use of a nipple of larger than the
ordinary diameter or two or more nipples of the ordinary size, greater area for the
passage of water through the nipples and better circulation of the water is obtained,
and the steam is more freely separated from the water.
Dated this 17th day of T.... 10on
JOHNSON MILLS.
COMPLETE SPECIFICATION.
Improvements in Steam and Water Drums, and in their Application
to Water Tube Steam Boilers.
1, JOHNSON MILLS of High Green Villa Prestwich in the County of Lancaster
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
-
The improvements which are the subject of this invention relate to the formation
of the front end plates of steam and water drums in water tube steam boilers, and the
object of this invention is to construct the pockets to which the front headers of tubes
are connected, in a manner that said pockets may form part of front end plate, and
also allow space for a greater number of nipples than ordinary to be employed for
connecting the headers to said pockets.
In this invention I construct a pocket in combination with the front end plate of a
steam and water drum, in the same manner as that which I have described in the
specification of my invention for which letters patent for Great Britain were granted
to me dated August 31st A.D. 1888 and numbered 12545 for the rear end plate of a
steam and water drum, by shaping and bending a plate of mild steel or other suitable
material to the required form, and either rivetting or welding the joints: this end
plate may either be dished or may be flat. I connect the front headers of tubes by
means of either horizontal, vertical or inclined nipples, the number and size of said
nipples varying according to the number of tubes connected with each header. In
order more clearly to describe this my invention, I have annexed hereunto a sheet of
drawings in the several views therein shown similar letters refer to similar parts.

page_text: but
Fig. 1 is side view of front end of steam and water drum a showing front end
plate b formed with a pocket c, said pocket being connected to header d by means of
the nipples e. Fig. 2 is front view of front end plate band pocket e with leader d
removed. Fig. 3 is back view of the same plate and pocket detached from steam and
water drum a. In these views the nipples e are shown placed in a vertical row,
the number employed may be varied more or less to suit requirements and size of
pocket and they may be placed zigzag when preferred. Fig. 4 is end view of
front end plate b and pocket c. Fig. 5 is transverse section of the same but
ropresenting front end plate as being constructed of a dished form. Fig. 6 is a
view similar to Fig. 1 but with pocket c formed so that a parallel or straight
header may be employed, said header being connected to pocket e by inclined
nipples e. Fig. 7 is a similar view to Fig. 3, but representing the nipples e placed
vertically by which to connect pocket e to header d.
с
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
In a water tube steam boiler the construction of a pocket to which the front headers
of tubes are connected to steam and water drun by shaping and bending the front end
plate of said steam and water drum, so as to form a pocket in combination therewith,
in order that the pocket may form part of front end plate substantially in the manner
and for the purpose herein before described.
Dated this 16th day of November 1889.
THOMAS PRESCOTT,
Agent for Applicant.