Improvements in Holders or Sockets for Incandescent Electric Lamps.
Year: 1892

page_text: Date of Application, 25th Jan., 1892
Complete Specification Left, 25th Oct., 1892-Accepted, 3rd Dec., 1892
PROVISIONAL SPECIFICATION.
Improvements in Holders or Sockets for Incandescent Electric
Lamps.
1, THOMAS JENNER of Mill Lane, Taunton in the County of Somerset,
Brewery Proprietor do hereby declare the nature of this invention to be as
follows:-
The body of the holder is a tube of insulating fibre or other non-inflammable
insulating material. The covered leads or wires enter the one end of the tube
through a screwed brass nipple forming the bottom of the tube and connect to
screws which are screwed into the tube from the outside. To the inner end of one
screw is connected a spring which makes contact with a knob or connection to a
central termination of one of the lamp terminal wires. The end of the other lead
or wire is held between the head of the other screw and a strip of metal which is
let in flush with the outside of the tube. The glass bulb is fixed in a brass socket
having a band shaped recess turned in it. This socket fits in the aforesaid tube
or body of the holder and is held therein by a wedge shaped lug protruding through
the tube into the said recess in the brass socket and forming a part of a milled ring
which can turn on the eccentrically turned and reduced upper end of the tube and
grip it. This milled ring turning on the eccentrically turned part of the tube has
substantially the same action as the holder described in my Patent Specification
No. 13023 The current passes through the brass strip let into the tube through
the milled ring the wedge shaped lug and the brass socket on the lamp bulb to the
other lamp terminal which is connected to the brass socket.
For switching the current on or off I provide a ring which can be turned partly
round on the outside of the tube and is formed with an arm with double wedge
shaped end, one side being of brass and the other of insulating material, the brass
wedge being adapted to form contact between the contact spring and the knob. Or
I use a key passing transversely through the tube and provided with a cam for the
same purposе.
COMPLETE SPECIFICATION.
Improvements in Holders or Sockets for Incandescent Electric
Lamps.
I, THOMAS JENNER of Star Hill Rochester in the County of Kent Brewery
Proprietor 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 :-
These improvements in holders or sockets refer mainly to the means for
attaching and detaching the glow lamp and to the means for turning the current
on and off.
Figure 1 of the accompanying drawings is a longitudinal section through a
holder constructed according to my invention and applied to a glow lamp.

page_text: The body A of the holder is a tube of insulating fibre or other non-inflammable
insulating material. The covered leads or wires, B and C enter the one end of the
tube A through a screwed brass nipple D forming the bottom of the tube and
connect to screws B¹ and C¹, which are screwed into the tube from the outside as
shewn. To the inner end of the screw B¹ is connected or fixed a spring B³ which
makes contact with a knob I or connection to a central termination of one of the
lamp terminal wires. The end of the other lead or wire C is held between the
head of the other screw C₁ and a strip of metal C' which is let in flush with
the outside of the body A. The glass bulb E is fixed in a brass socket F having
an annular band shaped recess F" turned into it. This socket F fits in the aforesaid
tube or body A of the holder and is held therein by a wedge shaped lug G¹ pro-
truding through a slot A¹ in the body A into the said recess F1 in the brass
socket F, the lug G¹ forming a part of a milled ring G which can turn on the
eccentrically turned and reduced upper end A of the body A and grip the
socket F in its recess F. It is not absolutely necessary to make the socket F
with an annular recess F¹ as it might be shorter but I prefer to make it with
annular recess for greater convenience sake. This milled ring G turning on the
eccentrically turned part A³ of the body A has substantially the same action as
the holder described in my Patent Specification No. 13023. H is a ring of
insulating material adapted to turn partly round on the outside of the body A and
is formed or provided with an arm with double wedge shaped end, see Figure 4,
one side H¹ being of brass and the other lined with insulating material H³, the
brass wedge H being adapted to form contact against the contact spring B³ and
raise it into contact with the knob I. The current passing in say from the wire B
goes to screw B', spring B' and part H¹, knob 1 burner brass socket F, wedge
lug G, ring G, metal strip C2, screw C₁, and wire C. For switching off the
current, the ring H is turned partly round so that the insulated piece H* comes
under the spring B².
.
Figure 5 is a side view and Figure 6 a longitudinal section at right angles
thereto of another form of holder in which a key H is used for switching on and
off. This key passes transversely through the body A of the holder and has a
cam Hof brass which can make contact with and raise the spring B³ so as to
make contact with the knob I on the lamp.
Figure 7 is a vertical longitudinal section, Figure 8 a like view at right angles
to Figure 7 and Figure 9 a detail view of another form of holder with transverse
key H for switching on and off, being provided with a spring cam H' which is
adapted in one position to make contact with a peg I', which by a spring I' is in
contact with the knob I on the lamp. A boss on the key is in constant contact
with a spring B* on a brass strip which is in contact with a spring plate under the
wire B held under the head of the terminal screw B', see Figure 8 which is a plan
view of these parts.
A similar spring plate under the wire C held under the head of the terminal
screw C¹ is in contact with the brass strip or lining C' which is in contact with the
brass socket F of the lamp bulb.
The milled ring G which can turn on the eccentrically formed upper end A' of
the body A has a lug G¹ working in a slot A* in the body A and its inner brass
lining and adapted to grip the socket F in its recess F¹ as in the previous
examples. The peg Gis in contact with the brass lining C. The body A has
a slot A** for entering the peg G' into the slot A*.
The current from the wire B passes to the spring plate under the screw B¹
thence to the spring B* the boss on the key H, the spring cam H¹, the peg I', the
spring 1', the knob I, the burner, the socket F, lug G¹, or lining C, spring
plate at screw C₁ and wire C. The wires B and C pass through the disc L of
insulating material which lies in a recess in the socket D which latter is united with
the holder A by means of a screwed ring D₁ as with an ordinary gas union for
facilitating the attachment of the leads.
The spring cam H¹ may be made to form contact direct with the side of the

page_text: knob I (and the spring I' and peg 1' with the diaphragm I in that case all be
omitted) by merely making the peg I a trifle longer and shifting the centre of the
key H nearer to the peg I, as shewn in Figure 10. The arrangement Figures 7
and 8 is an adaptation to existing lamps and not so simple.
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 :-
First. A glow lamp holder consisting of a tubular body having an eccentric
portion or neck A' with a slot formed therethrough and provided with a ring
adapted to rotate partly thereon and having a wedge piece working in the slot and
capable of being by such part rotation protruded inwardly through the slot and
gripping and holding the brass socket of the glow lamp which socket has a recess
for the wedge piece to enter substantially as set forth.
Second. A glowlamp holder consisting of a tubular body of insulating material
adapted to receive the glow-lamp socket at one end and with the wires entering at
the other end, one wire being connected to a terminal screw provided with a flat
spring arranged within the tubular body and which by a switch on the holder can
be electrically connected to or disconnected from a central terminal knob on the
glow lamp socket, and the other wire being connected to a terminal screw which
by a holder ring such as firstly claimed is in electrical connection with the metal
socket of the giow-lamp substantially as set forth.
Third. The spring switch H H' as described with reference to Figures 7 to 10.
Fourth. The constructions of glow-lamp holder and.switch shown on the drawing.
Dated this 25th day of October 1892.
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.