Improvements in Incandescent Electric Lamp Holders and the like.
Year: 1896

page_text: Date of Application, 6th Feb., 1896-Accepted, 6th Feb., 1897
COMPLETE SPECIFICATION.
Improvements in Incandescent Electric Lamp Holders and the like.
I, ARCHIBALD JOHN HOWARD of Euston Villa, Cheddon Road Taunton, in the
County of Somersetshire, 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:-
My invention relates to improved incandescent electric lamp holders and the like,
the construction and uses of which will be readily understood from the description
below with reference to the drawing filed with this specification.
Fig. 1 shows the ordinary pattern holder with the lamp in contact.
Fig. 2. shows the ordinary pattern holder with the lamp out of contact.
Fig. 3. shows my improved slot pattern holder with the lamp in contact.
Fig. 4. shows my improved slot pattern holder with the lamp out of contact.
Fig. 5. shows my improved ring pattern holder with the lamp in contact.
Fig. 5 shows a plan of the flanged ring of the holder.
Fig. 6. shows my improved ring pattern holder with the lamp out of contact.
Fig. 6 shows a sectional view of the flanged ring of the holder.
Fig. 7 shows a general view of my improved ring pattern holder with the lamp
in contact ready for lighting.
Fig. 8. shows a general view of my improved slot pattern holder with the lamp
in contact ready for lighting.
The improvements consist in so constructing the holders that when the lamps are
lowered out of contact with the electrically charged spring terminals S. S of the
holders, the lamps are still held safely in the holders and cannot fall out. These
improvements may be accomplished in different ways.
First. In the slot pattern Figs. 3. 4. 8 the slot A in the ordinary pattern is
replaced by a slot shaped as B Figs. 3. 4. 8. so that by changing the lamp from its
position in Fig. 3 to its position in Fig. 4, the lamp is lowered out of contact with
the electrically charged spring terminals S. S. and thus put out, but it is still
securely held in the holder by the supporting pins P. P engaging the bottom part
of slot B as in Fig. 4. A spiral spring not shown in the drawing is placed inside
the holder to steady the lamp when not in contact.
It will be seen from this description that the lamp can be made to act as
its own switch and thus effect the same purpose as the costly switch holders now
in use.
Second. In the ring pattern Figs. 5. 6. 7 a flanged ring, Figs. 5 and 6 is fitted
to the bottom of the ordinary pattern holder. This ring has two slots C. C in the
flange, to pass the supporting pins P. P. of the lamp. When it is required to place
a lamp in the holder the flanged ring is shifted round until its slots C. C are
opposite the slots A. A in the holder and the lamp is passed through the slots up
into its contact position. The flanged ring is then shifted back so that its
slots C. C. are not opposite the slots A. A. of the holder. Now if it is required to
put out the lamp it is simply necessary to lower it down until its supporting
pins P. P are resting on the flange of the ring, when the lamp will be out of
contact but will still be held securely in the holder by the flanged ring. A spiral
spring not shown in the drawing is placed inside the holder to steady the lamp
when not in contact. It will be seen from this description that this combination of

page_text: holder and lamp can act as its own switch like the slot holder and lamp Fig. 8 and
thus effect the same purpose as the costly switch holders now in use.
These holders may be used as wall connectors for electric table lamps warming
and cooking apparatus and the like.
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 :-
The improved types of incandescent electric lamp holders at present known as
the "bayonet joint holders" so constructed that the lamps may be lowered out of
contact with the electrically charged spring terminals of the holders but are still
held securely in the holders thus enabling this combination of improved holder and
lamp to act as its own switch substantially as herein before described with reference
to the drawings.