THE COMPTROLLER GENERAL'S DECISION
Year: 1884

page_text: We, ROBERT PERCY SELLON, Electrical Engineer, and GEORGE CAMERON SILLAR,
Engineer, both of Lambeth in the County of Surrey, seek leave to amend the
specification of Letters Patent, No. 10487 of 1884, as shown in red ink in the copy
of the original specification hereunto annexed.
Our reasons for making this amendment are as follows
That the claims as before made might be considered not sufficiently clear and
explicit as sufficiently to guard against colourable infringement.
In the Matter of an Application by Robert Percy. Sellon and George Cameron Sillar -
for leave to amend the Specification of Letters Patent N° 10487 of 1884:
THE COMPTROLLER GENERAL'S DECISION.
I determine to allow the three Claims to be amended in the manner proposed;
and I refuse to allow a fourth claim to be added to the Specification as the addition
of the new claim will be, in my opinion, contrary to the provisions of sub-sec 8 of
section 18 of the Patents & Act, 1883.
THE COMPTROLLER GENERAL'S DECISION.
I determine to allow the three Claims to be amended in the manner proposed;
and I refuse to allow a fourth claim to be added to the Specification as the addition
of the new claim will be, in my opinion, contrary to the provisions of sub-sec 8 of
20 section 18 of the Patents & Act, 1883.

page_text: Incandescence Electric Lamps.
We, ROBERT PERCY SELLON, Electrical Engineer and GEORGE CAMERON SILLAR,
Engineer, both of 112, Belvedere Road, Lambeth in the County of Surrey do hereby
declare the nature of our invention for IMPROVEMENTS IN THE CONSTRUCTION OF
HOLDERS OR SOCKETS FOR INCANDESCENCE ELECTRIC LAMPS, and in what manner
the same is to be performed, to be particularly described and ascertained in and by
the following statement :-
Our Invention relates to Improvements in holders or sockets for use with electric
incandescence lamps & consists in the production of a holder, whereby the
necessary electrical connection between the lamp & the source of electricity may be
easily & effectively made & maintained, in places where very heavy jarring and
vibration is experienced & where slight lateral or end motion of the lamp itself is
advisable to prevent rupture of the carbon filament.
The manner in which we carry out our Invention will be more readily under-
stood on reference being made to the drawings accompanying & forming part of
this Specification.
Fig. 1. shews a side elevation of the lamp fixed to the holder.
Fig. 2. is the same, but the holder & lamp have been turned through an angle of
90° & the holder is shewn partly in section.
Our holder consists essentially of a cap or base "a" made of any suitable
material, by means of which the holder is fastened to the fitting. To this cap "a"
we fasten by means of binges "b," one or more tongues "c" of metal or other
suitable material, two only shewn in the drawings, forming the sides of the holder,
in which is stamped a groove d" of suitable shape, to take an annular spiral
spring or collar "e": the tendency of which is to bring the tongues "c" toward
one another.
In the cap "a" we place a disc or piece of suitable insulating material "f"
through which are drilled two holes "g, g." In these holes we place two small
spiral springs of some suitable conductor of electricity", h" which are electrically
connected to the screws ", i" fixed to the disc "f" & have small books made in
their free ends.
Through the disc "f" we also drill two other holes, the object of which is to
hold & keep apart from one another the wires from the source of electricity.
When it is desired to place the lanıp in the holder, the tongues "c" are opened
out, the spring "e," thereby, flying back to the base "a" The two eyes formed in
the neck of the lamp are then threaded into the hooked shaped ends of the springs
"h.h"; the tendency of which is to keep the neck of the lamp close against the
disc "f" When the tongues "c" are brought together again, the lamp is forced
out from the disc "f" the. annular spring or collar flying back & bedding in the
groove "d" & thereby pulling the tongues "c" close together. In this way an

page_text: efficient electrical connection is made & maintained by the lateral grip of the
spring "e" on the tongues "c" together with the outward push of the lamp from
the disc "f" resulting therefrom, acting against the inward pull of the two springs
"h, h," the mechanical connection being such as to render the lamp free to vibrate
slightly in case of sudden jarring, without in any way interfering with the per-
manency of electrical contact.
Having now particularly described & 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
(i.) A holder for incandescence lamps, the sides of which are hinged to the a cap
or base, holding the wires from the source of electricity so as to admit of their the
sides opening & closing.
(ii.) In a holder as above described for incandescence lamps, the combination of
hinged sides or tongues with an annular spring or collar, extending round, bedding
into & holding together the two or more hinged portions of the side of the holder.
(iii.) In a holder as above described for incandescence lamps the combination of
hinged sides or tongues, an annular spring or collar & springs through which the
current is conveyed to the lamp, as hereinbefore described and illustrated.
TL0011 100K

page_text: PHOTOIONAL DREIFICATION,
ROBERT PERCY SELLON, Electrical Engineer and GEORGE CAMERON SILLAR
Engineer both of Lambeth in the County of Surrey, do hereby declare the nature
of our invention for IMPROVEMENTS IN HOLDERS FOR USE WITH ELECTRIC INCAN-
DESCENCE LAMPS to be as follows:-
Such improvements, whereby the necessary electrical connection between the
lamp and the source of electricity may be easily and effectively made and main-
tained even under conditions where considerable jarring and vibration is
experienced, and where it may become advisable to provide for some means of
permitting slight lateral or end motion to the lamp itself to prevent breakage of
the carbon filament.
Our holder, which may be made of any suitable material, consists of a base or
cap, having fastened to it by means of hinges an outer casing or cylinder made in
two halves, each half being hinged to the cap by a hinge as before mentioned.
Round this outer casing which is preferably of a cylindrical form is placed in a
groove made in the outer casing to receive it a circular spiral spring the tendency
of which, when the spring is at rest in the groove, is to draw together the two
halves of the outer casing.
In the cap or base is suitably fitted a piece of non-conducting or insulating
material such as vulcanized fibre or ebonite, with one or two holes in it to receive
the branch wires leading from the source of electricity to the lamp. The wires
are then suitably connected to two contact pieces, consisting preferably, of screws
screwed into the insulating material under the heads of which the wires are fixed.
In electrical connection with these two contact pieces are two spiral springs
from which the current is collected through two hooks made one at the end of
each spiral spring and onto which the lamp is fastened & held by means of two
eyelets of platinum or other material on the end of the lamp engaging with the
hooks.
When a lamp is to be inserted in the holder the two halves of the outer casing
are pulled apart, and the spring flies back to that part of the outer casing which
is of smallest diameter, that is, the part next the base thus admitting of the two
halves being pulled completely back and the lamp can be manipulated with ease.

page_text: The two eyes formed on the neck of the incandescence lamp by the platinum
wires, which form the terminals of the lamp, are threaded into the hooked shaped
ends of the before mentioned springs, the tendency of which is to keep the neck
of the lamp close to the base; when the two halves are brought together again the
lamp is pushed out from the base the circular spiral spring flies back, and an
efficient electrical connection is made and maintained by the lateral grip of the
circular spring on the outer casing together with the outward push of the lamp
from the base resulting therefrom, acting against the inward pull of the two springs
placed in the base of the holder: the mechanical connection being such as to render
the lamp free to vibrate slightly in case of sudden jarring without in any way
interfering with the permanency of electrical contact..
FOR Y

page_text: We, ROBERT PERCY SELLON, Electrical Engineer and GEORGE CAMERON SILLAR,
Engineer, both of 112, Belvedere Road, Lambeth in the County of Surrey do
hereby declare the nature of our invention for IMPROVEMENTS IN THE CONSTRUC-
TION OF HOLDERS OR SOCKETS FOR INCANDESCENCE ELECTRIC LAMPS, and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
Our Invention relates to Improvements in holders or sockets for use with
electric incandescence lamps & consists in the production of a holder, whereby the
necessary electrical connection between the lamp & the source of electricity may
be easily & effectively made & maintained, in places where very heavy jarring and
vibration is experienced & where slight lateral or end motion of the lamp itself is
advisable to prevent rupture of the carbon filament.
The manner in which we carry out our Invention will be more readily under-
stood on reference being made to the drawings accompanying & forming part of
this Specification,
Fig: 1. shews a side elevation of the lamp fixed to the holder.
Fig 2. is the same, but the holder & lamp have been turned through an angle
of 90° & the holder is shewn partly in section.
"
»
Our holder consists essentially of a cap or base "a made of any suitable
material, by means of which the holder is fastened to the fitting. To this capa
we fasten by means of hinges "b," one or more tongues C " of metal or other
suitable material, two only shewn in the drawings, forming the sides of the holder,
in which is stamped a groove "d" of suitable shape, to take an annular spiral
spring or collar "e": the tendency of which is to bring the tongues "c" towards
one another,
66
a
"
In the cap
we place a disc or piece of suitable insulating material "f"
through which are drilled two holes " g. g." In these holes we place two small
spiral springs of some suitable conductor of electricity "b. b" which are electrically
connected to the screws' c. c" fixed to the disc "f" & have small hooks made in
their free ends.
"
Through the disc "f" we also drill two other holes, the object of which is to
hold & keep apart from one another the wires from the source of electricity.
When it is desired to place the lamp in the holder, the tongues "c" are opened
out, the spring "e," thereby, flying back to the base "a" The two eyes formed
in the neck of the lamp are then threaded into the hooked shaped ends of the
springs "h.h"; the tendency of which is to keep the neck of the lamp close
against the disc "f." When the tongues "c" are brought together again, the lamp
is forced out from the disc "f," the annular spring or collar flying back & bedding
in the groove d" & thereby pulling the tongues close together. In this
way an efficient electrical connection is made & maintained by the lateral grip of
the spring "e" on the tongues "c," together with the outward push of the lamp
"
"

page_text: from the disc "f" resulting therefrom, acting against the inward pull of the two
springs "h, h," the mechanical connection being such as to render the lamp free to
vibrate slightly in case of sudden jarring, without in any way interfering with the
permanency of electrical contact.
Having now particularly described & ascertained the nature of our said
Invention, and in what manner the same is to be performed, we declare that what
we claim is
(i). A holder for incandescence lamps, the sides of which are hinged to the cap
or base, so as to admit of their opening & closing.
(ii). In a holder for incandescence lamps, the combination of hinged sides or
tongues with an annular spring or collar, extending round, bedding into & holding
together the two or more hinged portions of the side of the holder.
(iii). In a holder for incandescence lamps the combination of hinged sides or
tongues, an annular spring or collar & springs through which the current is con-
veyed to the lamp, as hereinbefore described and illustrated.
'