Improved Means for Connecting Screwed Pipes and Screwed Nipples.
Year: 1890

page_text: Date of Application, 5th Sept., 1890-Accepted, 25th Oct., 1890
COMPLETE SPECIFICATION.
Improved Means for Connecting Screwed Pipes and Screwed Nipples.
I, FREDERICK JOSEPH HADFIELD, 12 Manor Road, Stamford Hill, London,
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 consists firstly in forming a recess in one or each end of a socket,
cross piece, tee piece, bend or other connection for screwed pipes; or in one or
both ends of a length of screwed pipe; or in a tapped hole in a cylinder, tank, or
other vessel or receptacle ;-Or in a boss or thickening piece formed or fixed thereon ;-
Or in a stand, valve, cock, union piece, or other fitting to which a screwed pipe or
nipple is to be attached.-Secondly in fitting such recess with a soft metal or other
compressible packing-Thirdly, in making a projecting rim or collar on the back
nut or back nuts used to tighten up the joint so that when such back nut or nuts is
or are screwed on to the pipe or nipple the rim or collar enters the recess, and on
coming in contact with the compressible packing therein, forces it into the threads
on the pipe, and also tightly compresses it against the interior of the recess, thus
forming a perfect joint; and, as regards nipples, enabling them to be fitted at once.
When the walls of the cylinder, tank, or other vessel, are too thin to permit the
recess to be made therein direct; I form or fix thereon a suitable boss or thickening
piece having a tapped and recossed hole therein.
DRAWINGS.
In the accompanying drawings similar letters of reference indicate corresponding
parts.
Fig. 1 shews a view in longitudinal section of my invention when applied to a
socket for the purpose of attaching and jointing two lengths of screwed pipe.
Fig. 2 shows a similar view of one method of employing my invention for attaching
a screwed pipe or screwed nipple to a cylinder, tank, or other vessel or receptacle, or
to a stand or other fitting.
Fig. 3 shews a similar view of my invention when applied for jointing two lengths
of pipe together direct.
Fig. 4 shews a view partly in section and partly in elevation of one method of
applying my invention to a cock to which a screwed pipe or nipple is to be attached.
a is the recess, a' the compressible packing, b, the projecting collar or rim on
back nut.
ULAIMS.
Having now particularly described and ascertained the nature of my said inven-
O tion and in what manner the same is to be performed, 1 declare that what I
claim is :-
1. Forming a suitable recess in one or in each end of a socket, cross piece, tee
piece, bend or other connection for screwed pipes:-Or in one or both ends of a
length of screwed pipe ;-Or in a tapped hole in a cylinder, tank, or other vessel
5 or receptacle ;-Or in a boss or thickening piece formed on or attached thereto;-
DC23

page_text: Or in a stand, valve, cock, union piece or other fitting to which a serowed pipo or
nipple is to be attached and fitting such recess with any suitable compressible
picking all substantially in the manner and for the purpose hereinbefore described
and slewn.
2. Forming a projecting rim or collar on a hack nut all substantially in the manner
and for the purpose hereinbefore described and shown.
3. The improved means for connecting screwal pipos and screwed nipples all
substantially is heroinbefore described and shown.
Datul this 5th day of Santombar 1800
ELT & Co.,
33, Southampton Buildings, Holhorn, London, Agents for Applicant.