Improvements in Holders for Electric Glow Lamps.
Year: 1896

page_text: PROVISIONAL SPECIFICATION.
Improvements in Holders for Electric Glow Lamps.
I, THOMAS RICHARD DAVIS KENNY of 22, Thorn Terrace, Thorncliffe Road,
Bradford, in the County of York, Electrical Engineer, do hereby declare the
nature of this invention to be as follows:-
The object of this invention is to simplify and cheapen the construction of
holders for electric glow lamps, and at the same time to make them
convenient in use.
more
Lamp holders as ordinarily constructed are usually made in three parts (in
addition to the insulator) and if a lamp shade is used a fourth part is necessary
for holding same in position.
By my improvement I form the holder in one piece forming the outside of same
with an even surface. In order to attach a shade to my improved holder, I stamp
or form in one piece in any convenient manner a tube or ring, consisting of a
number of spring tongues. The parts of the spring tongues which engage with
the shade are bent inwards to form a series of hollows in which the shade top
rests. The opening in the top of the said shade may be easily passed over the
said spring tongues and on forcing the said tube over the lamp holder, the spring
tongues are expanded radially and grip the holder and shade firmly, securing the
latter in position.
If desired I may arrange the spring tongues in such a manner that only some
of them pass to the inside of the shade, the remainder being on the outside,
whereby the shade is held between the two sets of tongues.
One
The shade holder may be secured on the lamp holder in various ways.
method, when the holder slides on from the top, is to form an inside flange which
rests on the top of the lamp holder; or the shade holder may be screwed on to the
lamp holder or affixed by a bayonet joint or spring catch.
A modification of my improvement may be made by forming the spring tongues
out of and forming part of the lamp holder and bent and corrugated in such a
manner that on forcing the shade over the spring tongues, the latter will grip and
hold the shade with their outward pressure. If necessary the shade can be made
more secure by means of a sliding ring which passes between the lamp holder and
the spring tongues, locking the latter and making it impossible for the shade to
come off before the locking device is withdrawn.
I find in
The above description refers more particularly to pendant lamps,
practice it is more convenient for the simple wiring of wall brackets and the like
to construct the lamp holder so that the lower portion or tube may be removed
from the top portion which connects to the bracket. 1 accomplish this and dispense
with the usual union ring by forming the top with an external diameter suitable
to engage with the internal diameter of the upper part of the tube portion, which
latter portion I form with spring tongues, some of which have their extremities
bent inwards to form projections at the top of the tube. These enter recesses in
the top portion and connect the two portions together, but on turning the tube
portion a small fraction of a revolution the projections leave the recesses, allowing
the tube to be withdrawn.

page_text: If desired I can form these spring tongues in the upper portion of the holder
instead of in the tube as just described.
In either case as a means of further securing the spring tongues in position I
may use a ring which slides over the tongues and prevents the projections from
leaving the recesses, but I prefer to make my improved shade holder fulfil this
function when placed in position for supporting the shade.
The details of the construction described above may be so modified that the tube
instead of sliding on to the top in a direction towards the bracket, may be slid on
over the top in a direction from the bracket. With this arrangement the tube
may have an inside flange at the top to keep it from sliding beyond the top of
the holder; it also may have some spring tongues which will grip the top, or it
may have spring tongues and inside projections, or the tube may be made to enter
the upper part of the holder, the spring tongues being formed with external
projections which engage in the same.
By another arrangement the tube may be fixed to the top by means of a bayonet
joint fastening, projections or pins from the top being made to enter slots in the
tube or vice versa.
Or the construction of the parts may be so modified as to admit of my shade
carrying ring being used as a union ring to connect the top and tube portions
together.
In a holder for pendant lamps requiring a cord grip, I form the extreme top
portion or neck of the holder into any convenient number of spring tongues or
springs, for closing on and securing the "cord grip," which may be made in one
or more pieces of any suitable material. The gripping action may be got by
forcing the "cord grip" into the neck of the holder or by sliding or screwing a
ring over the neck, causing the springs to close radially.
Dated this 14th don of Max 1806
JOHN WAUGH,
Agent.
COMPLETE SPECIFICATION.
Improvements in Holders for Electric Glow Lamps.
I, THOMAS RICHARD DAVIS KENNY of 22 Thorn Terrace, Thorncliffe Road,
Bradford, in the County of York, 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 holders for electric glow lamps, and
also to improvements in shade or reflector carriers or holders for such lamps, the
object being to reduce the cost of construction of appliances, and to make them
more convenient to use and adapt to different circumstances.
Such being the nature and object of my said invention, the following is a
complete description of same, reference being had to the accompanying drawings,
in which
Fig. 1 is a side elevation of one of the improved lamp holders with shade or
reflector carrier.
Fig. 2 is a sectional side elevation of Fig. 1.
Fig. 3 is a side elevation partly in section of a lamp holder and a modified form
of shade carrier.
Figs. 4 and 4 are side elevations of modified forms of lamp holders.
Fig. 5 is a sectional side elevation of another form of shade or reflector carrier
adapted to be used in combination with Fig. 4.
Fig. 6 is a side elevation of the top of the lamp holder-being the upper part
of Fig. 2.

page_text: Fig. 7 is a plan view of the tube portion of the lamp holder-being the lower
part of Fig. 2.
Figs. 8 and 9 are views in elevation of the improved cord grip.
According to this invention, I form the holder 1 so that the outside of same has
an even and straight surface. In order to attach a shade or reflector 2 to my
improved holder 1, I stamp or form in one piece a tube or ring 3 having a number
of spring tongues 4. The parts of the spring tongues 4 which engage with the
shade or reflector 2 are bent inwards to form a series of hollows 5 in which the
internal edge of the hole in the top of the shade rests. The opening or hole in
the top of the said shade 2 may be easily passed over the said spring tongues 4,
and on forcing the said tube 3 over the lamp holder 1, the spring tongues 4 are
expanded radially, and grip the holder 1, and hold the shade 2 firmly and securely
in position. In Figs. 1, 2, and 5, the expanding pressure of the lamp holder 1 is
exerted at the point C, and in Fig. 3 at the point D.
If desired, the spring tongues 4 may be arranged in such a manner that only
alternate ones, or only some of them pass to and engage with the inside of the
shade 2, the remainder being on the outside, whereby the shade is held between the
two sets of tongues. In this case the outer tongues may be short and rigid, those
at the inside being longer and more flexible, so that the shade can be easily sprung
over them before the shade carrier is placed on the lamp holder (see Fig. 5).
One
The shade holder 3 may be secured on the lamp holder 1 in various ways.
method, when the holder 3 slides on from the top (see Figs. 1, 2, and 3), is
to form an inside flange 6 which rests on the top of the lamp holder 1
(see Figs. 2 and 3): or the shade holder 3 may be screwed on to the lamp
holder 1 or affixed by a bayonet joint or spring catch (see Figs. 4 and 5)
wherein the shade carrier is slid on from the bottom of the lamp holder, and the
spring tongue projections A in the latter, spring into the recesses B in the shade
carrier, and so hold the latter in position. To remove the shade carrier, it is first
pushed up a short distance, then partly turned round and drawn off.
A modification of my improvement may be made by forming the spring tongues 4
out of and forming a part of the lamp holder 1, and bent and corrugated in such
a manner that on forcing the shade 2 over the spring tongues 4, the latter will grip
and hold the shade 2 with their outward pressure, see Fig. 44 which shews the
lower portion of such a lamp holder. If necessary, the shade 2 can be made more
secure by means of a sliding ring K which passes between the lamp holder 1 and
the spring tongues 4, forcing the latter outwards and locking them, and making it
impossible for the shade 2 to come off before the locking device or ring K is
withdrawn.
Lamp holders to be used with pendant lamps, I prefer to form with the outer
shell or socket made in one piece, and when shades are used, they are attached
as hereinbefore described (see Fig. 3).
I find in practice it is more convenient for the simple wiring of wall brackets
and the like, to construct the lamp holder 1 so that the lower portion or tube may
be removed from the top portion which connects to the bracket (see Figs. 2, 4, 6,
and 7). I accomplish this and dispense with the usual union ring by forming the
top with an external diameter of such size as to engage with the internal
diameter of the upper part of the tube portion 1, which latter portion I form with
spring tongues 8, one or more of which have their extremities bent inwards to form
projections 9 (see Fig. 7) at the top of the tube 1. These projections 9 enter
recesses 10 in the top portion 7 and connect the two portions 1 and 7 together,
but on turning the tube portion 1 a fraction of a revolution, the projections y leave
the recesses 10, allowing the tube 1 to be withdrawn. A small inclined portion 11
in the top 7 allows the projections 9 to be slided up same, so as to expand them
previous to their springing into the recesses 10.
If desired, I can form these spring tongues in the upper portion 7 of the holder 1,
instead of in the tube 3 as just described-i.e., the positions may be reversed.
In either case, as a means of further securing the spring tongues 8 in position,

page_text: I may use a ring which slides over the tongues 8 and prevents the projections 9
from leaving the recesses 10: but I prefer to make my improved shade holder 3
fulfil this function when placed in position for supporting the shade. The upper
or tube portion 3 of shade carrier shewn by Fig. 5 accomplishes this when the
shade carrier is placed in position on the holder (Fig. 4), because when in this
position the spring tongues 8 are securely locked in engagement with the top 7.
Shade carriers as shewn by Figs. 1, 2, and 3 effectually lock the spring
tongues 8 when the solid portion 3 at the top extends so as to cover the upper
ends of the said tongues.
The details of the construction described above may be so modified that the
tube 1 instead of sliding on to the top in a direction towards the bracket, may be
slid on over the top in a direction from the bracket. With this arrangement the
tube 1 may have an inside flange at the top to keep it from sliding beyond the top
of the holder 7: it may also have spring tongues similar to 8, which will grip the
top 7 or it may have spring tongues and inside projections: or the tube 1 may be
made to enter the upper part of the holder 3, the spring tongues 8 being formed
with external projections which engage in the top 7.
The tube 1 may be fixed to the top 7 by means of the ordinary bayonet joint
fastening, projections or pins from the top being made to enter slots in the tube 1,
or vice versa.
The construction of the parts may be so modified as to admit of my shade
carrying ring being used as a union ring to connect the top and tube portions
together.
The ordinary insulator is put into the tube 1 from the upper end, and is kept in
position by projections on the inside of the tube, entering key beds in the insulator
in the ordinary way.
In a holder for pendant lamps requiring a cord grip, I contract the extreme
top portion or neck 12 of the holder 1 (see Figs. 8 and 9) into any convenient
number of spring tongues or springs 13 for closing on and securing the cord
grip 14, which may be made in one or more pieces of wood, vulcanite, or other
material, when the latter together with the wired insulator is forced into position
at the lower end of the holder 1. Or the spring tongues may be made to close
directly on the conductors by sliding or screwing a ring over the neck 12. With
either of these arrangements the grip on the cord is sufficient to keep the insulator
in place when the lamp is removed from the socket.
Having now 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) A shade carrier consisting of a series of spring tongues which are expanded
radially and caused to hold the shade when the shade carrier is placed in position
on the lamp holder, as herein described, and substantially as illustrated by
Figs. 1, 2, 3 and 5 of the annexed drawings.
(2) A lamp holder, the lower edge of which forms a series of spring tongues
constituting a shade carrier, as herein described, and substantially as illustrated by
Fig. 4 of the annexed drawings.
(3) A lamp holder made in two pieces connected together by means of spring
tongues or catches, as herein described, and substantially as illustrated by Figs. 2,
4, 6, and 7 of the accompanying drawings.
(4) A lamp holder, the top or upper portion of which is contracted and forms
a series of spring tongues, as and for the purpose herein described, and substantially
as illustrated by Figs. 8 and 9 of the drawings annexed hereto.
(5) A lamp holder, the top or upper portion of which is contracted and forms
a series of spring tongues combined with a split or segmental cord grip, as and
for the purpose herein described, and substantially as illustrated by the accompanying
drawings.
(6) A lamp holder made in two pieces connected together by means of spring

page_text: tongues or catches in combination with a shade carrier which both holds the shade
and locks the said tongues or catches, as herein described, and substantially as
illustrated by Figs. 2, 4, and 5 of the annexed drawings.
Dated this 8th day of October 1896.
THOMAS RICHARD DAVIS KENNY,
By his Agents, Brierley & Howard,
Penny Bank Chambers, Halifax.