A Combined Incandescent Electric Lamp Holder, Fuse, and Switch.
Year: 1889

page_text: Date of Application, 12th Jan., 1889
Complete Specification Left, 29th May, 1889-Accepted, 20th July, 1889
PROVISIONAL SPECIFICATION.
A Combined Incandescent Electric Lamp Holder, Fuse, and Switch.
WALTER NORTHCOTT NAYLOR Electrician and WALTER JAMES NAYLOR Coal
Merchant both of 36 Deptford Lower Road Rotherhithe London S.E. do hereby
declare the nature of this invention to be as follows:-
:-
This Invention relates to "a combined holder for Lamp and fuse with switch" and
is carried out as follows:-A piece of ebonite slate or any other good insulator is
fashioned into a cylindrical shape and over the insulated cylinder are forced according
to one form of my invention two pieces of stout tube leaving an insulated space.
between them; pins, screws, or equivalent are passed through the metal cylindrical
pieces into the insulated cylinder and a deep groove is cut open on either side
longitudinally, so as to divide the two metal strips into four distinct semi-cylindrical
pieces. Suitable set screws are mounted upon the two insulated semi cylindrical
metal pieces on one side, and between these are placed a fusible plug or equivalent,
when employed. Upon the opposite semicylindrical metal pieces the switch is
mounted, this being preferably of the interlocking type, and consisting essentially of a
right angular piece of metal pivoted upon one insulated semi-cylindrical piece the
longer leg being furnished with a hole or equivalent for the attachment of a cord.
Upon the corresponding insulated semi cylindrical piece a preferably, straight bar is
pivoted having an eye for a cord for at its longer end which interlocks with the right
angular piece by the action of suitable springs. Two metallic jaws or clip pieces
preferably fastened to the bottom insulated strip embrace and steady the incandescent
lamp which is held in position by suitable hooks passing through the insulating
cylinder described and connected to the bottom semi cylindrical pieces. Terminals or
equivalent are suitably mounted upon the device described, the operation of which is
as follows. The current enters preferably in such a manner as to pass through the
upper semicircular metal piece, from that to the fusible or other plug or cut out and
lower semi circular strip connected with lamp hook, through the lamp, thence by
opposite hook to opposite strip through the interlocking switch, and thence to outgoing
terminal. The circuit is broken by pulling the cord attached to the pivoted rectangular
piece, and restored by pulling the cord attached to the straight or equivalent shaped
piece interlocking therewith.
Our invention is especially suitable for electric lamps placed high up in rooms,
halls, or buildings, as a lamp or series of lamps can be lighted or extinguished without
the necessity of running special wires to within reach operated by an ordinary switch.
We sometimes dispenso with the semicylindrical pieces and replace them by metal
strips of any suitable shape sunk within the insulating substance, the fusible plug and
interlocking switch remaining as before described, or being suitably adapted thereto.
Dated January 12th 1889.
FRANCIS M. ROGERS,
COMPLETE SPECIFICATION.
A Combined Incandescent Electric Lamp Holder, Fuse, and Switch.
WALTER NORTHCOTT NAYLOR and WALTER JAMES NAYLOR both of 36 Deptford
Lower Road Rotherhithe London, E.C. Electricians 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 a combined holder for lamp and fuse with switch and is
carried out as follows:-A piece of ebonite slate or any other good insulator.is fashioned
[D1

page_text: into a cylindrical shape and over the insulated cylinder are forced according to one
form of my invention two pieces of stout tube leaving an insulated space between them,
pins screws or equivalent are passed through the metal cylindrical pieces into the
insulated cylinder and a deep groove is cut open on either side longitudinally so as to
divide the two metal strips into four distinct semi-cylindrical pieces. Suitable set
screws are mounted upon the two insulated semicylindrical metal pieces on one side
and between these are placed a fusible plug or equivalent when employed Upon the
opposite semicylindrical metal pieces the switch is mounted, this being preferably of
the interlocking type and consisting essentially of a right angular piece of metal pivoted
upon one insulated semi cylindrical piece the longer leg being furnished with a hole or
equivalent for the attachment of a cord. Upon the corresponding insulated semi
cylindrical piece a preferably straight bar is pivoted having an eye for a cord at its
longer end which interlocks with the right angular piece by the action of suitable
springs, two metallic jaws or clip pieces preferably fastened to the bottom insulated
strip embrace and steady the incandescent lamp which is held in position by suitable
hooks passing through the insulated, cylinder described and connected to the bottom
semi cylindrical pieces. Terminals or equivalent are suitably mounted upon the device
described, the operation of which is as follows:-The current enters preferably in such
a manner as to pass through the upper semicircular metal piece from that to the
fusible or other plug or cut out and Tower semi circular strip connected with lamp
hook, through the lamp, thence by opposite hook to opposite strip through the inter-
locking switch and thence to outgoing terminal. The circuit is broken by pulling
the cord attached to the pivoted rectangular piece, and restored by pulling the cord
attached to the straight or equivalent shaped piece interlocking therewith.
Our invention is especially suitable for electric lamps placed high up in rooms, halls,
or buildings as a lamp or series of lamps can be lighted or extinguished without the
necessity of running special wires to within reach operated by an ordinary switch.
We sometimes dispense with the semicylindrical pieces and replace them by metál
strips of any suitable shape sunk within the insulating substance, the fusible plug and
interlocking switch remaining as before described, or being suitably adapted thereto.
To enable this invention to be better understood reference is made to the accom-
panying drawings in which :-
Fig. 1. is a front elevation.
Fig. 2. is a side elevation.
Fig. 3. is a front view of the switch when open and the lamp circuit is broken.
1. Fig. 1. 2. 3. is the ebonite, slate, wood or other cylindrical insulating core,
2. 3. are two metal tubes fastened to the core by screws or equivalent 4, a gap or
insulated space 5, being left between them. The tubes 2, 3, are divided longitudinally
as at 6, so forming 4 distinct and insulated semicircular pieces. Binding screws 7. 8,
are mounted as shewn for holding the fusible plug, wire or equivalent 9. The circuit
leads or wires are connected to terminals 10. 11. connected to the divided upper
tube 2, upon the upper and lower divided tubes 2, 3. is mounted the switch con-
sisting of a right angular metal arm or leg 12, pivoted at 26 having an eye 13, for
attachment of cord 14, and a pivoted interlocking bar or leg 15, having eye 13, for
attachment of another cord. The two legs 12. 15 forming the switch are kept in firm
contact when locked by the springs 16, 17, pins 18, 19, 20, control the motions of the
two arms of the switch. Metallic clips 21, or equivalent as see Fig. 2, embrace the
incandescent lamp 22, which is fastened to two hooks 23, 24, in metallic connection
with the lower portion of divided tube 3. Figs. 1. 2. shew the switch locked so as to
permit the current to flow to the lamp. Fig. 3. shews the switch unlocked, and the
circuit to lamp is broken off; .25, is the nipple for screwing to ceiling.
The operation of the device described is as follows:-When the switch is in the
position shewn in figs. 1. 2, the current enters from the main conveying same preferably
by binding screws 11, fusible plug, wire, or equivalent 9, and divided tube 3, thence by
hook 24, connected thereto, and lamp; passing out by hook 23, divided tube 3,
legs 15, 12, of switch to terminal 10, connected to return main or wire.
By pulling cord 14, attached to leg 12, of switch the lower leg 15, is unlocked by

page_text: the action of spring 17, and the circuit to lamp broken as shewn in Fig. 3. By pulling
the cord attached to bar 15 the circuit is restored. If desired the lamp 22 may be
kept in contact with the hooks 23. 24. by a spring device 21, as shewn in Fig. 2.
or any equivalent means.
We do not bind ourselves to the exact shape or arrangement of the various parts of
our invention shewn in the drawing for effecting the purposes described since they
may be altered to suit particular positions. For instance the position of the switch device
may be reversed when the lamp is mounted uppermost. Again the semicylindrical
pieces may be replaced by metal strips of any suitable shape sunk in the insulated
substance, the fusible plug and interlocking switch remaining as before described or
being suitably adapted thereto.
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
claim is :-
1st. The particular combination of a holder for an incandescent electric lamp and
fuse with switch herein described substantially as set forth.
2nd. In or with a combined holder for an incandescent electric lamp and fuse.
The interlocking switch device consisting of right angular or equivalent pivoted
bar 12, engaging with pivoted bar 15, the springs 16. 17. mounted and operating as
shewn, and the fusible plug or equivalent 9. The circuit being opened or closed by
pulling the cords or equivalent attached to eyes 13, in legs 12. 15, of switch in the
manner described.
3rd. The combination in or with a combined holder for an incandescent electric
lamp and fuse with switch of the clips or spring device 21, for keeping the leading in
wires of lamps 22. in contact with the hooks 23. 24 attached to the divided tubes 3. as
set forth.
t
Dated M
1000
FRANCIS M. ROGERS,
Agent for Applicants.