Improvements in Insulating-joints.
Year: 1896

page_text: Late of Application (in United Kingdom), 17th Mar., 1896
Complete Specification Left, 17th Mar., 1896-Accepted, 22nd Aug., 1896
COMPLETE SPECIFICATION.
Improvements in Insulating-joints.
I, GEORGE JEROME CARSON, of No. 171 Adams Street, in the City of Chicago,
State of Illinois, United States of America, Electrician, 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 improvements in joints or couplings, and while it is
more especially designed to be used in uniting pipes employed in gas-fixtures and
other fixtures for illuminating purposes to the supply-pipe, yet it may be used for
other purposes; and it consists in certain peculiarities of the construction, novel
arrangement and operation of the various parts thereof, as will be hereinafter more
fully set forth and specifically claimed.
The objects of my invention are first, to provide an insulating-joint which shall
be simple and inexpensive in construction, strong and durable, and effective in
operation, and second, such a joint or coupling which shall afford absolute aud
perfect insulation, and by reason of the peculiar construction and formation of its
parts will be so strongly and securely located that all danger of impairment of the
fixture at the joint or coupling is removed..
In order to enable others skilled in the art to which my invention pertains to
make and use the same, I will now proceed to describe it, referring to the
accompanying drawing, in which-
Figure 1, is a central vertical sectional view of my joint or coupling, showing it
uniting the gas-fixture to the supply pipe.
Figure 2, is a central sectional view of the upper securing-collar.
Figure 3, is a perspective view of an insulating disk or washer.
Figure 4, is a sectional view of the locking-collar, showing the internal teeth or
corrugations thereof.
Figure 5, is an insulating disk or washer used on said corrugations or teeth.
Figure 6, is a sectional view of the internal locking piece or bolt.
Figure 7, is a perspective view of an insulating disk or washer to be applied on
the bottom of the piece or bolt.
Figure 8, is a central sectional view of the lower uniting-collar.
Figure 9, is a perspective view, partly in section, of the locking or exterior
collar. And
Figure 10, is a similar view of the interior locking-piece.
Similar letters refer to like parts throughout the different views of the
drawing.
A, represents a gas or supply pipe to which the pipe B, of the fixture is united
by means of my insulating joint or coupling. The lower portion of the pipe A, is
provided with external screw-threads, as is also the upper part of the pipe of the

page_text: fixture. On the screw-threaded portion of the pipe A, is secured a collar C, which
is internally screw-threaded, and is provided at its lower portion with an external
annular rim or flange c, which rests on and holds in position the insulating-disk D,
which may be made of any suitable non-electric conducting material, but preferably
of mica. This disk is formed with a central opening d, of a size sufficiently large
to admit of the insert therethrough of the internal locking-piece E, which is
provided with a vertical opening e, and is externally screw-threaded to engage the
threads of the collar C.
The lower portion of the opening e, in the locking-piece E, is enlarged, as at el,
for the purpose presently to be explained. The lower portion of the piece E, is
formed or provided with an annular rim or flange E', having on its upper surface
corrugations or teeth e, which are preferably angular in form and are adapted to
engage or mesh with corresponding corrugations or teeth f, in the main or locking
collar F, which is provided with a central opening f', somewhat larger in diameter
than the stem of the piece or bolt E. The lower portion of the opening f, in the
locking-collar F, is enlarged, so as to form an internal rim f, in which the
corrugations or teeth f, are formed, and is provided with screw-threads f³, to engage
similar threads on the external portion of the lower uniting-collar G, which collar
is provided with a screw-threaded central opening g, somewhat enlarged, as at g¹,
in its top.
As shown in Figure 1 of the drawing, the uniting-collar G, engages the screw-
threads on the fixture-pipe B, and said collar is separated at its top from the lower
portion of the locking-piece E, by means of the insulating disk or washer D
which is provided with a central opening for the passage of the gas. Between the
corrugations or teeth f, in the locking-collar F, and the correspondingly-shaped
teeth or corrugations e, on the flange E¹, of the interior locking-piece E, is placed
and secured a ring or washer D2, of insulating material.
From the foregoing and by reference to the drawing it will be seen and readily
understood that by securing the uniting-collar C, on the supply-pipe A, and also
fixing the lower uniting-collar G, on the fixture-pipe B, said pipes will be in
condition to be united by means of my coupling or joint, which is performed by
inserting the locking-piece E, through the opening f, in the main or exterior
locking-collar and screwing the said bolt or piece into the uniting-collar C, which
operation will draw the upper surface of the collar F, on which is placed an
insulating washer or disk D, against the lower surface of the annular rim or flange c,
of the upper uniting-collar, and at the same time will cause the teeth or corrugations
on the piece E, to engage the corresponding teeth or corrugations in the locking-
collar F, and to firmly secure therebetween the insulating washer or disk D2, which
surrounds the stem or bolt E, and lies on the teeth a², of the flange E¹, thereof.
On the upper surface of the lower uniting-collar G, is placed an insulating disk or
washer D, having a central opening d, to correspond with the opening in said
collar, which, as before stated, is attached to the fixture-pipe. The collar H, is
then screwed into the lower portion of the locking-collar F, and clamps the
insulator D', firmly between it, the collar G, and the bottom of the locking-piece E,
as is clearly shown in Figure 1 of the drawing.
By the foregoing arrangement of the various parts of the joint or coupling-piece
it is apparent that I attain a very strong joint in which the supply and fixture
pipes are absolutely and perfectly insulated one from the other, so that it would be
impossible for an electric current to pass from one to the other. In order to more
effectually prevent the current passing through the opening in the insulator D',
from the collar G, to the locking-piece E, the adjacent portions of the openings
in each of said pieces are enlarged, as shown at g', and el, respectively.
By reference to Figure 1 of the drawing, it will be observed that the locking
piece E, and the flange E¹, thereon is of smaller diameter than the opening f, in
the exterior locking-collar, and that when in position, as shown in Figure 1 of the
drawing, there will be a space between the periphery of the annular rim or
flange E¹, and the wall of the opening in the said locking-collar, which space may

page_text: be filled with any suitable material. The stem or piece E, being smaller than the
opening f1, is caused to center in said opening by reason of the engagement of the
teeth e, with the teeth f, on said collar, which teeth afford a very secure lock or
fastening for said parts, and in some instances may be used as a coupling for pipes
or other devices in which an insulator is not required.
While I may make the insulating washers or disks D, D', and D2, of any
suitable non-electric-conducting material, yet I prefer to use mica, which I have
found by experiments to be especially adapted for use in my joint, and more
particularly between the teeth or corrugations on the locking-piece E, and main
locking-collar.
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:
1. The combination with a uniting-collar on the ends of two pieces to be
joined together, a main locking-collar engaging the collar on one of said pieces,
and formed with an opening or chamber provided with an annular rim having
teeth or corrugations, and an interior locking-piece having an annular flange
provided with teeth or corrugations to correspond with and engage those of said
locking-collar, and adapted to be secured to the other piece to be united,
substantially as described.
2. In an insulating-joint the combination of the collar C, secured to the supply-
pipe, with the collar G, on the fixture-pipe, the main locking-collar F, having
the opening f, provided with the annular rim f, formed with teeth or
corrugations, and engaging the collar G, the insulating disks or washers D,
and D¹, on the tops of the collars F, and G, respectively, the locking-piece E,
having the annular flange E¹, provided with teeth or corrugations 2, located
within the collar F, and adapted to engage its teeth and the collar G, and the
insulating disk or washer D, located between the teeth of the piece E, and
the collar F, and adapted to be clamped thereby, substantially as described.
Dated this 17th day of March 1896.
GEORGE JEROME CARSON,
Boult & Wade,
Agents for the Applicant.