Improvements in Frames for Lamp Shades.
Year: 1899

page_text: Date of Application, 10th Aug., 1899
Complete Specification Left, 10th May, 1900-Accepted, 23rd June, 1900
PROVISIONAL SPECIFICATION.
Improvements in Frames for Lamp Shades.
I, MALCOLM WYNDHAM WADHAM, of Woodlands, Adisham, Dover, in the
County of Kent, Gentleman, do hereby declare the nature of this invention to
be as follows:-
-
This invention relates to improvements in frames for lamp shades, and the
object of it is to enable the shade to be folded up into a small space when not in
use and when in use to be capable of adjustment to different heights to suit
different requirements, for instance, when the light is required to be concen-
trated upon a book or other object near to the lamp, the shade be adjusted to its
lowest position and when the light is required to be more or less diffused about
the room the shade is adjusted to one or other of its higher positions accordingly.
The invention consists of a lamp shade frame composed of one or more central
rings of metal or other suitable material which when more than one are con-
nected together by means of rigid wires: the rings themselves standing verti-
cally over each other at a short distance apart. Outside this annular device
is another ring and somewhat larger than the others so that it can be slid over
them. To the top ring are loosely hinged wires or ribs and to these ribs are
hinged one end of wires forming struts the other ends of which are hinged to
the outer slidable ring; so that on raising the said ring more or less the frame
is opened to a corresponding extent in similar manner to an umbrella.
There is always provided a stop of some suitable kind such for instance as a
spring-pressed button on the immovable part of the frame and a slot in the
movable ring, so that when the said ring has been raised to its full height and
the shade thus opened out wide the said spring-pressed button shoots into the
slot in the movable ring which at this moment will be just opposite to it.
There may, however, be two or more of such stops situated at intervals be-
neath one another so that the shade may be adjustable to two or more positions.
T1
1011
f August 1900
COMPLETE SPECIFICATION.
Improvements in Frames for Lamp Shades.
I, MALCOLM WYNDHAM WADHAM, of Woodlands, Adisham, Dover, in the
County of Kent, Gentleman, 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 frames for lamp shades, and the
Improvements in Frames for Lamp Shades.
I, MALCOLM WYNDHAM WADHAM, of Woodlands, Adisham, Dover, in the
County of Kent, Gentleman, 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 frames for lamp shades, and the

page_text: object of it is to enable the shade to be folded up into a small space when not in
use and when in use to be capable of adjustment to different heights to sui
different requirements, for instance, when the light is required to be concen
trated upon a book or other object near to the lamp, the shade is adjusted to its
lowest position and when the light is required to be more or less diffused about
the room the shade is adjusted to one or other of its higher positions accordingly
The invention consists of a lamp shade frame composed of one or more central
rings of metal or other suitable material which, when more than one, are con
nected together by means of rigid wires; the rings themselves standing verti
cally over each other at a short distance apart. Outside this annular device
is another ring and somewhat larger than the others so that it can be slid over
them. To the top ring are loosely hinged wires or ribs, and to these ribs are
hinged one end of wires forming struts, the other ends of which are hinged to
the outer slidable ring; so that on raising the said ring more or less the frame
is opened to a corresponding extent in similar manner to an umbrella.
-
In order that my invention may be the more fully and readily understood I
hereby make reference to the accompanying sheet of drawings in which:-
Figure 1 represents a general view of my appliance in its most extended posi-
tion, namely that in which it is designed to diffuse the light over a relatively
wide area.
Figure 2 shows my appliance in its contracted position namely, as arranged
to confine the light of the lamp to a relatively small area or to enable it when
removed from the lamp to be conveniently packed.
Figure 3 is a sectional detail of a part of Figures 1 and 2 showing one of the
hinged ribs, one of the struts, one of the vertical uprights or rigid wires con-
necting the two horizontal rings, portions of these two horizontal rings, shewn
in partial section, and one of the clips or catches for holding the moveable ring
in position.
In all the figures the same letters of reference are employed to indicate the
same parts. R is the lower fixed horizontal ring which fits upon the body of
the lamp. R is a second horizontal ring secured above the ring R by means
of the bent approximately vertical rigid wires or rods w.
with a number of sockets in each of which one of the moveable ribs or rods
This ring is provided
is pivoted preferably as shewn in the drawing by a circular horizontal wire pass-
ing through all the holes both in the rods l and the sockets h.
On each of the vertical rigid rods or wires is a catch a consisting of a pin pro-
vided with a shoulder, and secured to a spring k which may be as shewn, flat
o, of any other suitable shape. r is the moveable or adjustable ring to which
the bent struts s, s, which are moveably secured through annular expansions at
their ends to the rods 7, 1, so that the latter may slide through them, are rigidly
affixed. o is a guide surrounding the rod w designed to prevent the ring r
turning round, one of these guides embraces each of the upright rods w.
The shade frame may be covered by any suitable flexible material.
When in the positions shewn in Figure 2, the ring r reposes on the ring R
in this position the struts s, s confine the rods or ribs 1, in a vertical or nearly
vertical position, the shade then concentrating the light on a small area, or being
suited to be stowed away in a small space. To bring the shade-frame into its
extended position, the ring r is raised until it slides over the catches c, c which
then assume the position shewn in Figure 3, preventing the ring from falling
back to its original position. At the same time the struts s, s, s have been raised
along the arms or rods 1, and the whole frame has assumed the position shewn
in Figure 1.
A stop or overhanging portion wl is provided on the vertical rods w to prevent
the ring and the arms being raised too high.
To restore the shade-frame to its original position as shewn in Figure 2, the
catches c, c, c, on each of the upright rods w, w, we are pressed inwards by means
of the expansions or thumb pieces e, e, e, shewn on the side of each of the

page_text: springs k, k, k, until the ring r can pass over them when it falls by its own
weight and the weight of the parts with which it is connected into its original
position. The catch e is provided with a shoulder as shewn in Figure 3 to
prevent the possibility of its being pushed right through the hole in which it
reposes.
If it should be desired to enable the shade-frame to be fixed at one or more
intermediate positions then additional catches must be arranged at different
points in the same horizontal planes on each of the vertical wires or rods w.
Similarly, though less satisfactorily, the struts s, s, instead of being arranged
to slide over the rods 1, may be pivoted to them and to the moveable ring r.
Likewise the catches c, c, c, may be to the advantage of the apparatus con-
nected together so that by operating one the others will be simultaneously
actuated.
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:-
1. In lamp or similar shades a vertically moveable ring provided with out-
wardly projecting arms adapted to raise or lower ribs or arms, substantially as
set forth.
2. In lamp or similar shades a ring vertically adjustable secured in position
by retaining and releasable spring-catches and provided at its periphery with a
number of outwardly projecting arms or struts adapted to raise and lower ribs or
arms pivoted at their upper extemities to a fixed upper ring, substantially as
set forth.
Dated the 10th
1000
PHILLIPS & LEIGH,
22, Southampton Buildings, Chancery Lane, W.C.,
Agents for the Applicant."