An Improved Clamping Socket for Gripping the Sliding Rods of Adjustable Lamps, Gasaliers, Screens, Tables, Music Stands, Reading Stands, and other Telescopically Worked Articles.
Year: 1889

page_text: Date of Application, 10th Oct., 1889-Accepted, 23rd Nov., 1889
An Improved Clamping Socket for Gripping the Sliding Rods of
Adjustable Lamps, Gasaliers, Screens, Tables, Music Stands,
Reading Stands, and other Telescopically Worked Articles.
I, JAMES HENRY STONE, of St. Pauls Square Birmingham, Manufacturer, do hereby
declare the nature of my said 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 an improved arrangement and construction of clamping
socket suitable for gripping and for holding (fixing) at any desired extension or
height the inner rods or tubes say of adjustable lamps and other articles working
telescopically in an outer tube socket or joint.
On the accompanying drawing Fig. 1. represents a sectional view of my improved
clamping socket apparatus complete applied to the upper extremity of an adjustable
standard lamp. Figs. 2. and 3. illustrate a sectional view and plan of the socket
alone. Fig. 4. is a sectional view of the screwed cap and Fig. 5. an exterior view of
the sleeve piece.
a.
I employ a screwed socket a upon the outer tube 6 of the standard lamp or other
article fitted with a screw cap c for the sliding rod g to pass centrally through similar
to a stuffing box gland. From the bottom of this socket a projects upwards a cylin-
drical sleeve piece (shewn screwed into position) which tapers upon the outside and
is provided with longitudinal slits e dividing its upper edge into tapering segments f
so that when the screwed cap the centre of which is bored out taper to corre-
spond with the tapered surface of the segments f-is screwed down into its socket the
said segments are caused to gradually close in and tighten upon the rod b until the
same becomes firmly affixed in position.
In this manner I am enabled to affix the rod 6 at any desired extension or
height.
In some cases I line the inside of the sleeve piece d with cloth or other suitable
packing material to increase the frictional hold and smooth action between the
surfaces.
This improved clamping socket is equally applicable to the slides of gasaliers to
supporting electric and other hanging lamps in position also to adjusting the height
or extension of the telescopic rods in reading or music stands, screens, tables and for
other analogous purposes where a grip action is required for tightening upon a rod or
tube either for smooth sliding or for fixing purposes.
In Fig. 6. I illustrate a modification of my improved clamping socket suitable for
heavier clamping purposes-and in which the fixed tapering sleeve piece herein before
described is substituted by a pair of loose semi-cyclindrical tapering pieces seen
separately in Fig. 7 which rest upon the bottom of the socket whilst the screwed
cap is bored out conically to correspond with the tapering outer surfaces of the semi-
cylindrical sleeve pieces h and is capable of closing the same with great force upon
the sliding rod k.
Having thus particularly described and ascertained the nature of this my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:
1st. The improved arrangement and construction of clamping socket for gripping
the sliding rods of adjustable lamps, gasaliers, screens, tables, music stands, reading
stands and other telescopically worked articles substantially as hereinbefore described
and illustrated on the accompanying drawing,

page_text: 2nd. In a clamping socket the employment of fixed or loose tapering sleeve pieces
capable of tightening upon the sliding rod or tube substantially as and for the purposes
herein before described and illustrated on the accompanying drawing.
Dated this 9th day of October 1889.
JOHN G. WILSON,
Patent Office, 55, Market Street, Manchester, Agent for the Applicant.