Improvements relating to the Jacketing of Pipes and Cocks, Chiefly Designed for use in connection with Vacuum Pumps for Exhausting Incandescent Electric Lamps.
Year: 1891

page_text: COMPLETE SPECIFICATION.
[Communicated from abroad by ADOLPH BERRENBERG, of Somerville, County
of Middlesex, Massachusetts, United States of America, Engineer.]
Improvements relating to the Jacketing of Pipes and Cocks, Chiefly
Designed for use in connection with Vacuum Pumps for
Exhausting Incandescent Electric Lamps.
I, HENRY HARRIS LAKE, of the firm of Haseltine, Lake & Co. Patent Agents,
45 Southampton Buildings, in the County of Middlesex 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 relates to a method of connecting and jacketing pipes and cocks,
and is particularly adapted to be used in connection with vacuum pumps for making
incandescent lamps. The object being to render said pipes and cocks air tight and
easily connected and disconnected.
This object I attain by the mechanism shown in the accompanying drawings, in
which
Figure 1 is a vertical, longitudinal section, showing a method of forming joints
to connect vacuum pipes to a "fork" socket, also showing the lower end of a
"fork."
Figure 2 is an elevation of the same.
Figure 3 is a vertical longitudinal section showing my device as applied to a cock.
Figure 4 is an elevation of the same.
In the drawings, A and A' represent the pipe that leads from a vacuum pump to
the lamps to be exhausted. E and E are jacketing pipes made so much larger
than the vacuum pipe as to leave a space S between the two as shown. This
space S may be filled with oil or some of the fluid adapted for the purpose of
sealing joints, &c., or the space may be a vacuum in connection with an auxiliary
pump.
C, C', C² represent a jacketing case connected to the pipes E and E¹ by the
following described device: E2 is a thimble having an external screw thread cut on
each end as shown, the ends of this thimble E² are internally coned so that the
packing K and K may be forced partly into them, that is between the ends of the
thimble and the pipe E on the one side, and the part of the jacketing case on
the other. F and F are screw collars adapted to engage with the screw thread on
the ends of the thimble E2 and coned interiorly so as to embrace the packings K
and K. As the several joints shown in the drawings are all like the one just
described, they need not be explained.
The jacketing case C has a bottom C³ screwed into it, as shown, and at the top
has an annular member C projecting from its interior wall; this annular member
serves as a buttress for supporting the socket-piece B, said socket-piece being held
firmly in place by the screw follower B¹.
The upper open end of the jacketing case is cupped for holding any suitable
sealing fluid.
In Figs. 1 and 2, I have shown in connection with my device the socket-end P
of a "fork," such as are made by glass-blowers for connecting the bulbs of incan-
descent lamps to the vacuum pump, and fits by a ground-joint F* into the socket-
piece B. A similar device may be used for connecting the vacuum socket B to any
article to be exhausted.
In case this device is to be used for a part of a stop-cock, then a key D, Figs. 3
and 4, is to be used; this key D has a handle H, and a transverse opening D for
the purpose of connecting the passage in the vacuum pipes A. and A¹ when desired.
A small opening d is made in the key D, extending from the transverse opening D,

page_text: to the lower end of the key. This opening allows the otherwise imprisoned air
or liquid below the end of the key to escape, otherwise it is found difficult to make
the key stay in place.
Having now particularly described and ascertained the nature of this inven-
tion, and in what manner the same is to be performed, as communicated to me
by my foreign correspondent I declare that what I claim is :-
In connection with a system of vacuum pumps the combination of a socket piece
adapted to receive a key or the socket end of a "fork," and having passage
connections with the vacuum system with the jacketing piece C, having passage
connection with a jacketing system as described, substantially as and for the purpose
set forth.
Dated this 24th day of February 1891.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.