Metal Attachment for Perforated Pipes.
Year: 1890

page_text: Date of Application, 6th Aug., 1890
Complete Specification Left, 6th May, 1891-Accepted, 13th June, 1891
PROVISIONAL SPECIFICATION.
A Metal Attachment for Perforated Pipes.
JAMES MALPASS Master Plumber 37 to 39 Blackburn Road Haslingden in
the County of Lancaster do hereby declare the nature of this invention, to be
as follows:-
This invention is intended to obviate the necessity of replacing pipes in machines
where perforated pipes are used when the holes have got too large to be of use for
the purpose for which they were intended. The attachment is made of brass or
any other metal and is made with a screw at one end for the. purpose of being
screwed into the pipes.
The opposite end is made spherical with a square at the base for tightening up.
A small hole is drilled through the attachment to allow steam, gases, or liquids
of any kind to pass through. The pipes are drilled and tapped for receiving
same.
1000
JAMES MALPASS.
COMPLETE SPECIFICATION.
A Metal Attachment for Perforated Pipes.
I, JAMES MALPASS of Blackburn Road Haslingden in the County of Lancaster,
Plumber, 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 an attachment for perforated pipes such as are used
for example for the admission of steam into sizing troughs and for other
purposes.
In such pipes, the perforations for the passage of the fluid become obstructed
or enlarged, and unsuitable for the purpose for which they were intended, and the
pipe has to be replaced, or the perforations have to be plugged and re-drilled
from time to time.
This invention is intended to obviate this defect and for this purpose, instead of
drilling each perforation as usual in the walls of the pipe, I form a perforation
through an attachment which is constructed so as to be capable of being screwed
into a tapped hole formed through the thickness of the pipe.
I will describe my invention with reference to the accompanying drawing which
represents a longitudinal section of a portion of a pipe having my attachments
applied thereto; one of the attachments being represented in elevation and the
other in vertical section.
A is the pipe equivalent to the perforated pipe ordinarily used and in which
tapped holes are formed at suitable distances and in the required positions for the
reception of the attachments.
The attachments have a square or hexagonal part B or other equivalent part
adapted to be engaged by a spanner or key to enable the attachment to be inserted
and removed. The upper end C is preferably dome-shaped, and the lower end is
screwed to fit the tapped holes in the pipe. Through the centre of the attachment
the small hole D is formed through which the steam or other fluid issues from the
pipe. A collar E may be formed on the attachment below the part B, to enable a
tighter joint to be made.

page_text: When the perforations D become worn, obstructed, or otherwise useless or
unsuitable, the attachment may be readily withdrawn and replaced by a new
one. In many cases the removed attachment may be cleaned or repaired, for
subsequent use.
L
Having now particularly described and ascertained the nature of my said
invention and in what manner the 'same is to be' performed, I declare that what I
claim is,
An attachment for perforated pipes, constructed substantially as and for the
purpose herein before described and as illustrated by the accompanying drawing.
Dated this 5th day of May A.D. 1891.
WILLIAM E. HEYS,
Agent for the Applicant.