Improvements in Extension Lamps or Lamp Standards.
Year: 1890

page_text: Date of Application, 24th Nov., 1890
Complete Specification Left, 20th Ju y, 1891-Accepted, 17th Oct., 181
PROVISIONAL SPECIFICATION.
Improvements in Extension Lamps or Lamp Standards.
I. CLEMENTINE PHILIP SHAW of 130 Anderton Street, Ladywood, in the City
of Birmingham, Brass Founder, do hereby declare the nature of this invention to
be as follows :-
This invention relates to improvements in the holding and releasing mechanism
of extension or pillar lamps, as hereinafter described.
According to my improvements, I employ an automatic grip, in the form of jaws,
carried at the lower end of the extension part of the lamp, and which said jaws arc
expanded out, and impinge against the interior of the pillar tube, by the action of
a wedge, fitted at the lower end of an operating rod, worked by a hand lever, so
that on the said lever being gripped, the rod is raised, and the jaws allowed to close,
so as to admit of the extension part being raised or lowered.
In carrying out my invention, the pillar tube, which is provided with feet or
other supports at its lower end, has fitted and working within it telescopically, an
extension tube, surmounted at its upper end by a lamp.
The lower end of the extension tube, which is the inner tube, is slotted, wherein
affixing jaws, take and are connected to the outside of the inner tube, by a rivet, or
a screw, passing through a flat bow spring, encircling the back of the said tube and
connecting the jaws. This spring closes the jaws, when the same are free, by the
lifting of the coned end of an operating rod which consists of a rod directed axially
up the middle of the extension tube, and jointed at its upper end to a jointed lever,
alike unto a pump handle.
Encircling the rod is a coiled spring, with its ends respectively abutting upon an
upper shoulder of the extension tube, and a collar on the operating rod of the inside
diameter of the extension tube.
The jaws as aforesaid, which are connected by a web spring, and whose normal
condition is closed, lave serrations upon their outer sides, which when opened out,
come against the inside surface of the tube of the pillar, and hold the extension part
in a position to which it may have been brought.
The extreme lower end of the extension tube below the jaws, is provided with a
plunger like bearing, made of rubber, felt or like yielding material, which acts both
for guiding the extension tube, and also for cushioning the air in the interior of the
pillar part. This plunger like bearing is alike unto the plunger of a syringe, and
is arranged that the air may escape by the sides, or through a hole made within the
middle of the carrying frame of the plunger, and which hole may be regulated in

page_text: underside of the said rubber block, in manner that the same is compressed between
the said collar, and an abutment of the extension tube, so that the releasing of the
operating rod by the lever, compresses the rubber, and bulges it out against
the inside of the pillar, and so causing the extension part to be held thereby.
The gripping of the lever, releases the pressure upon the rubber block, and
admits of the extension tube being adjusted.
Ou the other hand, the rubber block may normally be expanded, while the lifting
of the operating rod, contracts the same, by the forcing or concaving of its middle,
and so detracting its circumferential area.
Dated this 22nd day of November 1890.
CLEMENTINE PHILIP SHAW,
By Henry Skerrett,
Agent for Applicant.
COMPLETE SPECIFICATION.
Improvements in Extension Lamps or Lamp Standards.
1, CLEMENTINE PHILIP SHAW of 130 Anderton Street, Ladywood, in the City
of Birmingham, Brass Founder, do hereby declare the nature of this invention and
in what inauner the same is to be performed, to be particularly described and
ascertained in and by the following statement
This invention relates, to improvements in the holding, and releasing mechanism,
of extension, or pillar lamps, as hereinafter described.
According to my improvements, I employ an automatic affixing means, in the
form of jaws, carried at the lower extremity of the extension part of the lamp;
and which said jaws, are expanded and made to impinge against the interior of the
pillar tube, by the action of a wedge or conc cud, fitted at the lower end of au
operating rod, worked by a hand lever; so that on the said lever, being gripped by
the hand, the rod is raised, and the jaws allowed to close, by a spring action, so as
to admit of the extension part, being raised or lowered.
In carrying out my invention, the pillar tube, which is provided with feet or other
supports, at its lower end, has fitted and working within it telescopically, an
extension tube, surmounted at its upper end by a lamp.
The lower end of the extension tube, (which is the inner tube) is slotted, wherein
affixing jaws, take, and are connected to the outside of the inner tube, by a rivet, or
a screw, passing through a sheet metal bow string, encircling the back of the said
tube and connecting the jaws.
This spring closes the jaws, when the same are free, by the lifting of the coned
end of an operating rod, which consists of a rod, directed axially up the middle of
the extension tube, and jointed at its upper end, to a jointed lever, alike unto a
pump handle.
Encircling the rod is a coiled spring, with its end respectively abuting against a
shoulder of the extension tube, and collar on the operating rod, of the inside
diameter of the extension tube.
The jaws as aforesaid, which are connected by a web spring, and whose normal
position is closed, have teeth or serrations upon their outer sides, which when
opened out, are forcibly pressed against the inside surface of the pillar tube, and
there hold the extension part, in a position, to which it may have been brought.
The extreme lower end of the extension tube below the jaws, is provided with a
plunger-like bearing, made of rubber, felt, or like yielding material, which acts
both for guiding the extension tube, and also for cushioning the air in the interior
of the pillar part. This plunger-like bearing, is alike unto the plunger of a syringe,
and is arranged that the air, may escape by the sides, or through a hole made
within the middle of the carrying frame of the plunger; and which hole, may be
regulated in size by an adjustable screw.

page_text: The now releasing of the lever g, causes the spring h, to expend its energy upon
the operating rod f, and force it downwards, with its lower coned end taking
between the jaws P, which are thereby forced asunder, the free sides d², of the
spring d, carrying the jaws, opened out, and the spike-like teeth ', forcibly
impressed against the inside of the pillar tube a, as aforesaid, hence the automatic
and instantaneous holding of the extension or telescopic part of the lamp. The
spring d is connected to its carrier, by screws d'.
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:
First In the affixing, and releasing mechanism of extension lamps, or lamp
standards, arranging at the lower end of an operating rod, of spring jaws, consisting
of a half-hoop-shaped spring, carrying upon its inside, and outside free ends, and
free sides, respectively, jaws and teeth like roughings, substantially as described
and set forth in Figures 1 to 6.
Secondly-The combination with the coned or wedged shaped end f, of the
operating rod, and the carrying end 66, of the tube b, of a spring d, with
parts d², da, d, substantially, as set forth, in Figures 1 to 8.
Thirdly :- The combination with the tube a, and tube b,, with its parts 63, bº;
(of the latter) of a holder d, d², d³, d, operating rod f, f², ƒ ƒ ƒ³, and combined
guide and plug e; and which said parts, are constructed, arranged, and operate, and
co-operate, substantially as described and set forth in Figures 1, 2, and 3.
Fourthly The general constructions, and arrangements of the parts of extension
lamps, or lamp standards, as herein described and set forth in Figures 1, 2, and 3.
Dated this L5th day of July 1891.
CLEMENTINE PHILIP SHAW.
Henry Skerrett,
6, Livery Street, Birmingham, Agent for Applicant.