Improvements in Shade Holders.
Year: 1894

page_text: Date of Application, 21st Mar., 1894-Accepted, 5th May, 1894
COMIT LEIE DI MUIFICATION.
Improvements in Shade Holders.
I, WILLIAM MCKENZIE, of Waverley House, Durant's Road, Ponder's End,.
London, N., Electrical Engineer, 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 Shade Holders and whilst being
particularly applicable for use or employment in connection with electric lamps, it
is also of advantage when adapted to gas, oil or other lamps. By this invention
a firm and strong holder for shades is provided which is easily manipulated and
which greatly facilitates the operations of fixing and removing shades as compared
with the ordinary methods hitherto in use, consisting of a series of screws, generally
three, working in a rim or collar of the frame or shade holder.and which from a
variety of causes were inefficient in action and inconvenient to manipulate.
And in order that this my invention may be fully understood and readily carried
into effect, I will describe same with reference to the accompanying sheet of
drawings upon which
Figure 1 is an elevational view (partly in section) of a shade holder of ordinary
construction,
Figure 2 is an elevational view (also partly in section) of the frame or gallery
constructed in accordance with this invention―
Figure 3 is a view in elevation, partly in section, of a locking or holding collar
which I place around the frame or gallery shewn in Figure 2-
Figure 4 is a plan of the locking or holding collar, partly in section, shewn in
position around the frame or gallery above mentioned, which in this view is shewn
in sectional plan through line X7 Figure 2-
Figure 5 is a sectional elevation of the lower portion of the frame or gallery
with locking collar in position around same, and
Figure 6 is an elevational view of the lower portion of the frame or gallery,
shewing certain peculiarities of construction which will be more fully described
hereafter.
Similar letters of reference indicate like parts throughout the six figures.
Referring particularly to Figure 1, which as aforesaid represents a shade holder
of ordinary construction, it will be observed that the frame or holder a is formed
with a projection or shoulder a¹ around its circumference and below this are set
screws which project into the interior of the frame or holder a and serve to
suspend or grip the shade when placed in position, usually with its swelled edge
within the shoulder a¹. Many disadvantages and inconveniences arise from this
method of attachment especially upon occasions where a shade has to be removed
or replaced in the dark.
Now in accordance with this my invention, instead of employing the set screws b
for holding the shade, I have a locking collar c which surrounds the frame or
holder a and in which I mount upon pivots the locking pieces d. To enable these
to act in the desired manner for gripping the shade, I construct the frame (see
particularly Figures 2, 4, 5 and 6) with a longer parallel portion a² at its lower
end than is the case with the holders previously in use and I dispense with the
projection or shoulder a¹ (Figure 1), but in the parallel portion a² of the frame a
I form openings e in number corresponding to the locking pieces d on collar c,
(three will be found a convenient number). At one end of each of these openings e
I form the guide pieces by bending over a portion of the metal cut out from the
openings e, as seen particularly in Figure 4. These guides are for the purpose

page_text: of acting upon the pivoted locking pieces d and thereby causing same to protrude
through the apertures e into the interior of the frame a and there grip the shade.
The action is as follows:-The shade is placed in position in the holder or
frame a and the locking collar c, which has been passed over the top of the frame a
and surrounds same around its lower edge, which latter is formed with a bead a³
to support the collar, is given a portion of a turn when the guides will be caused
to impinge against the locking pieces d and turn them on their pivots, so that
they enter the apertures e of the frame a, as shewn in dotted lines Figure 4 and
bear against the shade and support or hold same. To regulate the amount of
travel of the locking collar, I furnish said collar with the set screw 9 (see Figure 4)
which I place in position between the two stops h formed on the frame a (see
Figures 4 and 6) for the purpose. These stops h I preferably form by stamping
or cutting out suitably sized and shaped pieces from the frame and bending same
over as shewn in the figures mentioned. The extent of travel is then limited to
the distance between the stops h, and if desired the set screw g may be utilized
for fixing or firmly securing the locking collar to the frame when once adjusted.
As a check against any tendency of the locking collar being forced upwards, I may
form the catches i by cutting out triangular or other suitably shaped portions from
the frame a and bending same over as seen particularly in Figures 4 and 5.
Having thus 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 construction, arrangement and combination of parts, forming my improve-
ments in shade holders, substantially as herein before described and shewn in the
drawings.
2. In shade holders the frame a formed with beading a³, apertures e and guides f
in combination with the locking collar or ring c provided with the pivotted locking
pieces d, arranged and operating substantially as hereinbefore described and
shewn.
Dated this 20th day of March 1894.
HUGHES, ELI & HUGHES,
76, Chancery Lane, London, W.C., Agents for the Applicant.