Globes, Glasses, or Shades.
Year: 1884

page_text: Globes, Glasses, or Shades.
I ALEXANDER BEWICKE BLACKBURN of 57 Holborn Viaduct in the City of
London Electrical Engineer do hereby declare the nature of my invention for
IMPROVEMENTS IN APPARATUS FOR HOLDING OR SUSPENDING LAMP GLOBES,
GLASSES OR SHADES to be as follows:-
"
My Invention relates to simple apparatus which is intended more particularly
for holding or suspending globes, glasses or shades employed in connection with
electric lamps and especially, where such lamps are used on board ship and in
other places in which they are exposed to sudden vibrations. The apparatus
consists of double armed levers (say for example three or more in number)
pivotted to the stem of the lamp bracket or support, one arm of each of which
levers is adapted for engaging with or passing beneath the lip or flange of the
globe, glass or shade, whilst the other arm is capable of being acted upon by a disc
bell or skeleton frame fitted so as to be free to slide along the supporting stem and
maintained in position by a nut engaging with a screw thread cut on the said
supporting stem.
In the act of fitting a globe, glass or shade to the support, the lower or outer
arms of the levers are closed in so as to admit of their introduction into the globe,
glass or shade, after which the disc, bell or skeleton frame is slid along the stem so
as to bear upon the upper or inner arms of the levers thereby causing the outer
arms of the levers to become distended and the disc, bell or frame is then secured
in its place by the act of screwing down the nut, the reverse operations being
performed when it is required to remove the globe, glass or shade from the
support.

page_text: mprovemenes in apparatus ng
Globes, Glasses, or Shades.
I ALEXANDER BEWICKE BLACKBURN of 57 Holborn Viaduct in the City of
London Electrical Engineer, do hereby declare the nature of my invention for
"IMPROVEMENTS IN APPARATUS FOR HOLDING OR SUSPENDING LAMP GLOBES,
GLASSES OR SHADES "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 simple apparatus which is intended more particularly
for holding or suspending globes, glasses or shades employed in connection with
electric lamps, and especially where such lamps are used on board ship and in other
places in which they are exposed to sudden vibrations. The apparatus consists of
double armed levers (say for example three or more in number) pivotted to the 1
stem of the lamp-bracket, or support or to a connection therewith, one arm of each
of which levers is adapted for engaging with or passing beneath the lip or flange
of the globe, glass or shade, whilst the other arm is capable of being acted upon by
a disc, bell or skeleton frame fitted so as to be free to slide along the supporting
stem and maintained in position by a nut engaging with a screw thread cut on the
said supporting stem.
In the act of fitting a globe, glass or shade to the support, the lower or outer
arms of the levers are closed-in so as to admit of their introduction into the globe,
glass or shade, after which the disc, bell or skeleton frame is slid along the stem so
as to bear upon the upper or inner arms of the levers thereby causing the outer
arms of the levers to become distended and the disc bell or frame is then
secured in its place by the act of screwing down the nut, the reverse operations
being performed when it is required to remove the globe, glass or shade from the
support.
And in order that the said Invention may be perfectly understood I shall now
proceed more particularly to describe the same, selecting as a typical example of
its use the holding or suspending of lamp-globes in an inverted position; and for
that purpose I shall refer to the several figures on the accompanying sheet of
drawings, the same letters of reference in which indicate corresponding parts in all
the figures.
Figure 1 of the accompanying drawings represents a vertical section of the
holder with the globe suspended therefrom; Figure 2 is a sectional elevation of the
holder with the outer arms of the supporting levers hereinbefore referred to in their
closed-in position for the removal or introduction of the globe, a portion of which
is shewn in dotted lines; and Figure 3 is an under plan of the holder with the
globe removed,
A. A are double armed levers (three of which are shewn in the example
illustrated, but which may be employed in any required number) pivotted at 1 to a
connection b with the stem B, which stem may obviously form part of the lamp-
bracket or support, but is more conveniently arranged as represented in the
drawings in which the stem B is made hollow for the passage of the stem of the

page_text: lamp-bracket or support, not shewn, but intended to be attached to it. The arm a
of each of these levers is adapted for engagng with or passing beneath the lip or
flange c of the lamp globe C, that is to say of entering and resting under the
contracted neck of the globe, whilst the other arm a¹ of each lever is capable of
being acted upon by a disc or bell D or a skeleton frame, fitted so as to be free
to slide along the supporting stein B and maintained in position by a nut E
engaging with a screw thread b' cut on the said supporting stem.
In the act of fitting the globe to the holder the arms a of the levers A are
closed-in as indicated in Figure 2, so as to admit of the globe being passed over
them as represented by dotted lines in that figure, after which the disc or bell D
or skeleton frame is slid along the stem B so as to exert pressure upon the arms a¹
of the levers A, thereby causing the arms a to become distended and thus support
the globe in the manner shewn in Figure 1; and the disc or bell D or skeleton
frame is then secured in its place as shewn in that figure by the act of screwing
down the nut E. When it is required to remove the globe, the reverse operations
are performed as will be readily understood.
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
Apparatus for holding or suspending lamp globes, glasses or shades in which the
globe, glass or shade is supported by levers operated or controlled by a movable
disc, bell or skeleton frame, substantially in the manner hereinbefore described.
Dated this day of August LOOD.
TH J. HANDFORD,
Agent,
42, Southampton Buildings, London, W.C.