Differential Screw Nipple to Connect Flat Iron Surfaces.
Year: 1895

page_text: Date of Application, 23rd July, 1895
Complete Specification Left, 4th Feb., 1896-Accepted, 9th May, 1896
PROVISIONAL SPECIFICATION.
Differential Screw Nipple to Connect Flat Iron Surfaces.
CHARLES PATULLO KINNELL of 65 Southwark Street, Southwark in the
County of Surrey Engineer. I do hereby declare the nature of this invention to
be as follows:-
My invention relates to the connecting together by means of nipples having
different pitched threads at either end of flat iron surfaces and is specially
applicable to coupling up the various sections of hot water or steam radiators or
the various sections of hot water boilers when these are constructed in sections..
The 2 sections to be connected being drilled and tapped with suitable holes and
threads corresponding to the size of threads on the opposite ends of the nipple, the
latter being first screwed into one section of radiator or boiler the opposite end of
nipple with the larger thread projecting through the casting, the section to be
connected is held against such projecting end, the rotation of the nipple draws.
together the sections.
noted this 23rd day of Jule 1895
COMPLETE SPECIFICATION.
Differential Screw Nipple to Connect Flat Iron Surfaces.
I, CHARLES PATULLO KINNELL of 65 and 65*, Southwark Street, Southwark
in the County of 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 :-
This invention relates more particularly to nipples used in coupling up sections.
of hot water or steam radiators although capable of use for connecting any two
parts of any class of metal requiring their surfaces to be brought together with or
without a space between them or with only sufficient for an intervening washer to
make a sound joint when faces are not planed, the object of the invention being to
secure greater power and more certain operation in securing when required
absolute contact of the parts.
To the above ends the invention consists essentially in a differential screw nipple
and for full comprehension thereof, reference must be had to the annexed drawings
in which like symbols indicate corresponding parts and where
Fig. 1. is a side elevation of my improved nipple and showing two sectional parts
in position to be connected, the nipple having been started in its connection with
one of such parts;
Fig. 2. is a view similar to Fig. 1. but showing the parts in their connected
position;
Fig. 3. is a longitudinal section of the nipple; Fig. 4. being an end view of the
same.
The nipple is formed with one half, a, of its length of slightly smaller diameter
than the remaining half, b, and the half, a, has a larger screw thread of quicker
pitch than the screw thread, b, which may be of any slower pitch required.
[Price 8d.I

page_text: The nipple has projections, c, or recesses on its interior to afford a hold for any
suitable key or instrument for screwing it into its place.
To secure together the two sectional parts A and B which are of course drilled
and tapped with suitable holes and threads corresponding to the size of the threads
on the opposite ends of the nipple, this latter is first screwed into the plate, B, for
say half a thread, so that the opposite end with the larger thread projects through
the outer side as shown in Fig. 1., the section A, is then held against such
projecting end and by the continuous rotation of the nipple the sections are drawn
together, the one, A, of course travelling much faster owing to the increased pitch
of the thread working in it.
This construction in contrast to the usual right and left hand threaded nipple or
any single threaded screw is much more powerful and may be graduated so as to
give almost any connecting power.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, 1 declare that what
I claim is
First. A differential screw nipple.
Second. A coupling nipple having screw threads of differing pitch thereon for
the purpose set forth. Connecting two flat surfaces of metal, which surfaces may
or may not be turned or faced to make joint without intervening washer of any
suitable material. The invention being particularly applicable to connecting up
hot water or steam radiators or hot water boilers or appliances.
Third. A coupling nipple having its perimeter of differing diameter and the part
of larger diameter bearing a finer screw thread than the smaller part for the
purpose set forth.
Dated this the 31st day of January 1896.
CHARLES PATULLO KINNELL.
Witnesses to signature:-
CHARLES CLARK,
29 Kilmorie Road, Forest Hill, S.E.
JAMES J. JACOB,
5 Waller Road, New Cross, S.E.