Improvements in and relating to Supports for Incandescent Lamps.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
Improvements in and relating to Supports for Incandescent Lamps.
I, FREDERICK YOUNG, of 24, Dour View Terrace, Barton Road, Dover, in the County
of Kent, Electrical Engineer, do hereby declare the nature of this invention to be
as follows:-
:-
This invention relates to flexible supports for incandescent lamps and is especially
designed for use in supporting lamps on warships, and steam vessels of all descriptions,
vehicles and in other situations where the lamps are liable to be injured by sudden
shocks, or excessive vibrations.
In carrying out my invention I support the ordinary incandescent lamp holder
with the base suitably shaped to be connected to a set of springs. The corresponding
part or support to which these parts are to be attached, and to be carried by, is also
correspondingly formed to be attached to the springs; and each part so connected
is formed with projections, and the whole depends on the springs for connection and
elastic support.
For instance in the case of a bulb or incandescent lamp glass locked into its
socket, or support, this support may have a wide base, or piece on its inner or
bottom side with holes or connections for springs preferably spiral springs and
centrally it has a hollow projection or stem to serve as a guide for a central spring
of spiral form. The said springs at their other ends are connected to a similar plate
or base supported from the bridge, rail, roof or other part of the vessel or vehicle,
and a like central hollow projection, or stem, serves to guide the opposite end of the
central spring, whilst the outer springs are connected to the supporting plate in like
manner. The central spring is arranged to partially encircle the projection on each
plate, at its opposite end. Such spring I find it convenient to make of-say, four
turns of phosphor bronze-and the surrounding springs I also form of phosphor
bronze and of suitable strength. I use the central spring in compression and the
outer springs in tension disposed-if I use four-at an equidistance around the centre
one, with means of adjustment of their tension, as by small screw nuts arranged
below, or behind the supporting plate.
The insulated conducting wires for an electric incandescent lamp may be carried
to the filament within the lamp, through the hollow central projections and the
plates referred to respectively attached to the lamp holder and the main support or
relatively fixed base, thereby securing them from injury.
By these means the lamp floats on resilient supports-the central spring in
compression and the outer ones in tension-so that any shock or vibration com-
municated to the relatively fixed base is not communicated to the lamp in such an
abrupt manner as would cause a destructive effect, but is absorbed by the springs ;
and the filaments of the lamps and other of the parts are protected from mechanical
injury.
The improved means of support described facilitates the use of "brass cap

page_text: ፡፡
terminals in the place of "bottom loop terminals" the latter being found incon-
venient at sea.
Deted the 20th day of June 1800
WM. BROOKES & SON,
55 & 56, Chancery Lane, London, Agents for the Applicant,
Improvements in and relating to Supports for Incandescent Lamps.
I, FREDERICK YOUNG, of 24, Dour View Terrace, Barton Road, Dover, in the County
of Kent, 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 ascer-
tained in and by the following statement:-
This invention relates to flexible supports for incandescent lamps, and is especially
designed for use in supporting lamps on warships, and on steam vessels of all descrip-
tions, vehicles, and in other situations where the lamps are liable to be injured by
sudden shocks or excessive vibrations.
Figure 1 in the accompanying drawing shows, by side elevation, my improved
apparatus for supporting an electric incandescent lamp.
Fig. 2 shows by a section taken on the line a, a the arrangement of the springs
and lower part of Fig. 1.
Fig. 3 shows the same parts as are shown in Fig. 1, in the same relation but with
the (five) springs removed.
Fig. 4 shows the large central spring of Fig. 1 separately, in side elevation.
Fig. 5 shows a plan view of the lamp holder, Fig. 1, showing electric contact
pieces.
Fig. 6 shows an underside view of the upper spring plate of Fig. 1.
Fig. 7 shows an underside view and Fig. 8 an upper side view of the under
spring plate, the former. showing the screwed base socket 16 and the latter the
neck 14.
Fig. 9 shows by a sectional side view a modification of the same invention adapted
to an incandescent gas lamp.
Referring to Figs. 1 to 8 inclusive, 1, indicates a socket or holder, for an electric
incandescent lamp with bayonet joint slots, 2, 2 of ordinary construction, with usual
contacts 3, 3. This holder and the enclosed contact pieces are locked to the part, or
base, 4, by the screw ring 5 engaging by its internal screw thread the screw threads
on the holder 1 and base 4.
This socket base 4 is made in one with or attached to the square (say brass) plate 6
which plate is provided with four holes 7, one at each corner, for the attachment. of
the four springs 8. 9 is a similar and somewhat larger plate provided with cor-
responding holes 10, at its corners for attachment of the lower ends of the springs 8,
through the intermediary of the four square shaped eye bolts or stems 11, said
eyebolts receiving each one end of a spring 8 and being held in a correspondingly
square shaped hole 10 already mentioned, and each bolt being adjustably retained in said
hole by a nut 12. This adjustment of the nuts 12 on the stems 11 admits of the
tension of the springs 8 being varied to preserve equilibrium of the lamp.
On the underside of the plate 6 is a neck 13 and correspondingly on the upper
side of the plate 9 is a like neck 14. The larger spring 15 is placed partly around
each neck 13 and 14 and is held in that position by the springs 8 when the same are
connected to the plates 6 and 9 respectively.
The central spring 15 is then in compression and the outer springs S are in
tension and between them any excessive jerks or vibrations are absorbed by

page_text: these elastic connections, and prevented from reaching the incandescent and fragile
lamp.
Although I have shown the elastic support applied as a means of protection to an
electric bulb or incandescent lamp glass bayonet socket, the invention is applicable to
other incandescent lamp parts where like protection is required.
Referring to the modification Fig. 9 adapted to incandescent gas lamps the upper
plate 6 is provided with neck 13 as in the preceding figures the nipple 4 is made
with thread to suit thread on bottom of ordinary incandescent gas fitting and has an
inner neck 17 preferably slightly conical to receive a piece of india rubber or like
connecting flexible tubing 19. The lower plate 9 has a similar neck for reception
of the other end of tubing the bottom nipple or socket 16 is made with a female
thread to fit on ordinary gas bracket and the rounded portion of the nipple may have a
milled edge to facilitate grasping. A conveniently sized central hole 17 is provided
in each plate for the passage of gas.
The number of the springs can be varied according to the strain.
In extreme cases one spring may encircle one pair of necks of smaller diameter and
another and larger spring may encircle portions of the necks made of larger diameter
and surrounding the lesser springs-together forming the compression member-and
be held to their work by the four or other number of surrounding springs forming
the tension member of the combination.
The compression spring-here shown as made up of four turns-and the outer
springs in tension, 1 find it convenient to form of phosphor bronze.
Of course it will be obvious that the relative positions of the tension and com-
pression members of the spring combination could be changed, the inner being placed
in tension and the outer in compression without departing from the spirit of my
invention.
The insulated conducting wires for an incandescent electric lamp may be carried
to the filament within the lamp through the hollow central projecting parts
and through the plates, from the lamp contact pieces to the connections with the
source of supply of current, thereby securing these wires from injury.
By these means the lamp floats on a resilient support, whereby abrupt shocks
are not communicated to the same in so rude a manner as to destroy the tender
parts and these, such as the filaments or mantles are efficiently preserved from
injury.
The use of the herein before described means of support for incandescent electric
lighting apparatus much facilitates the use of "brass cap terminals" in the place
of "botton loop terminals" the latter being found to be inconvenient for use at sea.
Having now particularly described and ascertained the nature of any said
invention, and in what manner the same is to be performed, I declare that what
I claim is
1. The construction and use of supports for incandescent lamps, so that the
relatively rigid portions of such apparatus are insulated from each other, as regard,
transmission of mechanical shocks, or destructive vibration, by means of springss
applied substantially as and for the purpose described, and shown by the
drawings.
2. In a support for an incandescent. lamp, the arrangement in combination of a
lamp holder, a spring holding plate formed on, or connected thereto, a base, and base
plate with means of attachment between the base and the part of the vessel, vehicle
or other body to which the lamp is applied, and a system of springs in tension and
compression connecting and separating elastically in adjusted position the portions of
the lamp support, substantially as described and shown by the drawings.
1000
WM. BROOKES & SON,
55 & 56, Chancery Lane, London, Agents for the Applicant.