Improvements in Means or Devices for Holding Electric Incandescent or Glow Lamps.
Year: 1895

page_text: Date of Application, 21st Dec., 1895-Accepted, 25th Jan.,
1896
COMPLETE SPECIFICATION.
Improvements in Means or Devices for Holding Electric Incandescent
or Glow Lamps.
We, ROBERT HACKING, of 44 Crocus Street, Joiner, and JOHN BENNETT, of
158 London Road, Agent, both in the Town and County of the Town of
Nottingham, 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, reference being had to the accompanying drawings and
to the letters and figures marked thereon, that is to say :-
O
Our invention relates to improvements in means or devices for holding electric
incandescent or glow lamps, whereby such lamps can be secured in position and
contact be made by simply inserting them in their holders. Our improved means
or devices moreover readily permit the cleaning of the contacts and terminals when
they become oxidised by long use, or otherwise, and can be produced at a less cost
than the holders and caps now in use.
In carrying out our invention, we arrange the ends of the lamp terminals, say,
on opposite sides of the cap of the lamp, and when the outer tube of the cap is of
brass, or other conductor of electricity, these, terminal ends are suitably insulated
therefrom.
The cap of the lamp is adapted to fit into a holder lined, according to our
invention, with cork, asbestos cloth, or other suitable material of a gripping
nature, for the purpose of retaining the said cap and holding it in position. Two
contact strips, in connection with the circuit wires or leads, are arranged in this
holder opposite to each other in such a manner that on inserting. the cap the
aforesaid terminal ends make contact with these strips and so allow the current to
pass to the lamps.
--
Our invention will be better understood on reference to the annexed drawings,
in which:
Figs. 1 and 2 show, detached and in elevation, the various parts of one arrange-
ment of our improved holder.
Fig. 3 is an underside view of the same.
Fig. 4 shows one arrangement of our improved cap applied to a lamp.
Fig. 5 represents the capped lamp in the holder.
Fig. 6 is a plan, and Fig. 7 a section, of an arrangement of cap applied to a
smaller lamp.
Fig. 8 shows a holder for attachment to a gas fitting.
Fig. 9 shows a modified construction of the same.
Figs. 10 and 11 show the application of our invention to lamps suspended by
means of their leads.
Fig. 12 is a horizontal, section, and Fig. 13 an elevation, of another form of
holder, also for attachment to gas fittings.
Fig. 14 illustrates a modification of the same.
Fig. 15 illustrates a slight modification of the holder shown in Fig. 10.
Referring to Fige. 1 to 3, a are the contact strips of the holder which are formed
of brass, or other suitable metal, and are connected with the circuit wires or
leads a', these contact strips being, in this arrangement, attached to the board
or support A, to or from which the lamp is to be secured or suspended. b is the
body of the holder, and c the lining of gripping material. This holder is adapted

page_text: to slide along and fit over the contact pieces a, and is secured by, lugs d and screws-
to the board support.A.
-
e is the cap of the lamp, which filled with plaster, asbestos, or other suitable
material, and surrounds the terminals f, these terminals being bent over so that
their outer ends lie on opposite sides of the cap, as shown, and are separated
therefrom by insulating-strips g. The said terminal ends are so arranged that they
press against the contact strips a, on the cap being inserted in the holder, as shown.
in Fig. 5.
In the arrangement shown in Figs. 6 and 7, the cap is stamped or indented_to
receive the insulating strips g, the terminals of the lamp being held in the cap by
plaster, or other cement, i.
In the arrangement for attachment to a gas fitting, as shown in Fig. 8, the
holder consists of a socket b, having a taper screw .6, and the. leads a pass to
"binding screws 6 in connection with the contacts a.
Instead of the terminals-being bent over, as in the foregoing figures, they. may
⚫ be formed as shown in Fig. 9, in which case they come out on opposite sides of the
cap; said cap being conical, and made of ebonite or other insulating material. The
holder is correspondingly shaped, and. is provided with contact strips a, and
binding screws 62 for the circuit wires a¹.
In the arrangement shown. in Fig. 10, the holder, which is in the form of a
thimble or.ferrule; and has two holes m for the. passage.: of the contacts a, is
provided with a.flange. k, so that a shade l. can be put on from above and held in
position by a tube or ring ml of ebonite, brass, or other suitable material. In this
case, the contacts are preferably bent outwards at.n so as to prevent the weight of
the shade coming.on.theilamp.
The holder, may be provided with..hooks p, as in Fig. 11, by which it can be
suspended, and a screw-ring or.nut, q.may also be provided..so that..the shade can
be put on from below, before the lamp is inserted in the holder.
As shown in Figs. 12..and .13, the cap e may be formed.. of insulating material,
and provided with a flanger to rest on. the top edge of a tube.or holder 6 of brass,
webonite, or other suitable material.. The .said. holder is provided with a female
screw and, is split, as at s, and carries a tightening. ring t which may be moved
along the said.tubento cause it to grip, the cap e.and keep the lamp in position.
!
Fig. 14, the ends of the contact strips a are turned. over and rest upon the
outer edge of the holder, so that when the lamp is being inserted they shall not be
liable to be pushed out of place.
Fig. 15 shows an arrangement of holder in which the contact strips a are bent
- Gracranked at.n, so as to form-supports for the weight of the holder and. lamp, when
suspended from the leads attached to the said contacts.a; as in Fig. 10.
Although in the preceding description..the terminals are spoken of always as
being on opposite sides of the cap, yet, it is to be understood that we do not limit
ourselves to this arrangement, as the said terminals. may be: arranged in any other
suitable 1.manner. so long. as the contacts in the holder. are correspondingly
arranged.
The improved holder hereindescribed can..also be applied to the casing of a
portable storage battery, and would form a.convenient means for effecting the
recharging. of such battery, it being only necessary, in order to place the battery
in the charging circuit, to remove the capped lamp from the holder and to insert in
-.such holder a plug..having similarly arranged terminals to those described with
reference to the cap, the said terminals being then connected, by flexible leads, to
the source of electricity for effecting the recharging.
=
Having now particularly described and ascertained the nature of our said inven-
tion, and in what. manner the same is to be performed, we declare that what we
I claim is :-
1. The improved means or devices for holding electric incandescent or glow
lamps, wherein the ends of the terminals, or terminal wires, are arranged on the

page_text: sides of the cap, and which cap is adapted to fit into a holder provided with
correspondingly arranged contacts, and lined with a suitable gripping and insulating
material, substantially as described.
2. The various forms or constructions of caps and holders for electric incandescent
or glow lamps, in which the terminals or terminal wires, and the corresponding.
contacts, are arranged on opposite sides of the said caps and holders, substantially
as described with reference to the drawings.
3. In means or devices for holding electric incandescent or glow lamps, the use
of an asbestos cloth lining, as and for the purpose set forth.
4. Our improvements in means or devices for holding electric incandescent or
glow lamps, substantially as and for the purposes hereinbefore described, and as.
shown in the annexed drawings.
Dated this 21st day of December 1895.
ERNEST DE PASS,
Chartered Patent Agent,
78 Fleet Street, London, and 5ª Market Street, Nottingham,
Agent for the Applicants.