Improvements in connection with Electric Incandescent Lamps and Holders therefor.
Year: 1892

page_text: Date of Application, 17th Sept., 1892
Complete Specification Left, 17th July, 1893-Accepted, 16th Sept., 1893
PROVISIONAL SPECIFICATION.
Improvements in connection with Electric Incandescent Lamps and
Holders therefor.
I, THOMAS FROGGATT of 55 Thomas Street, Kennington Park in the County of
Surrey, File Manufacturer, do hereby declare the nature of this invention to be as
follows:-
:-
The improvements in connection with electric incandescent lamps, and holders
for same, constituting my invention, consists in constructing the lamp in such form
and dimensions, that the same, and the switch mechanism thereof, may be contained
within an ordinary watch case, in such a manner that the whole may be carried by
a person in the ordinary watch or like pocket of the vest, or other garment, the
necessary current, for which may be derived from a primary or secondary battery,
or accumulator, carried upon the person.
My said invention is intended to be used by omnibus and tramcar conductors for
examining the cash received in payment of the fares, and by the inspectors when
periodically examining the tickets held by the passengers, to prevent fraud, but the
same may be adapted for use by any person or persons who may periodically
require a low candle power illuminant, or by railway passengers when the ordinary
light provided in the carriage is insufficient for reading or like purposes.
I carry my invention into effect by procuring the case of an ordinary open faced
self winding watch, in which a hole or passage is provided at the bow for the
spindle of the winding mechanism, and through this hole I pass the two wires or
conductors from the battery, to the inside of the case, one of which may be connected
thereto, so that the case forms a conductor, while the other lead may be connected
to an insulated metallic plate fixed to the inside of the back of the case. A second
insulated plate may be fixed in a like manner to the case, not necessarily, but
preferably, parallel with the first, to which is attached or formed integrally there-
with, a curl or spring extending therefrom towards the periphery of the case, so
that a sliding plate upon the outside of the case, such as that usually employed for
operating the stop movement of an ordinary stop watch, may be so constructed as
to make and break contact with the aforesaid plate spring, and so close and open
the circuit. Upon each of the corresponding ends of the said plates I form a small
hook, which extend therefrom towards the glass dome of the watch case and pass
through holes formed in a paper, cardboard, or other non-conducting diaphragm
placed within the case, after the manner of a watch dial, and which may be marked
like thereunto, or printed, painted or impressed with any suitable design or
advertisement. I provide a low voltage lamp of such dimensions and shape as to
be capable of being placed in front of the said diaphragm or face, with its terminals
connected to the aforesaid hooks upon the internal plates, and to permit the glass
dome of the watch case to shut down thereon and thus hold it in position.
By moving the said sliding plate so as to make contact with the aforesaid curl or
spring, the current would pass, from the battery through one of the leads, to the case,
through the sliding plate, the curl or spring and its plate, through the lamp to the
other plate and back by the return lead to the battery and so complete the circuit.
To accommodate watch cases of different sizes or for other reasons, I may find it
convenient to vary the form, shape and position, of the internal plates, so as to
provide other means of opening and closing the circuit.
Dated the 17th day of Sentember 1892.
GEO. THOS. HYDE,
4, Moorfields, Fore Street, London, Agent for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in connection with Electric Incandescent Lamps and
Holders therefor.
I, THOMAS FROGGATT, of 55 Thomas Street, Kennington Park, in the County
of Surrey, File Manufacturer, 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:-
The improvements in connection with electric incandescent lamps and holders for
same, constituting my invention, consists of the construction of a lamp in such form
and dimensions that the same, and the switch mechanism therefor, may be contained
within, an ordinary watch case, in such a manner, that the whole may be carried
by a person in the ordinary watch or like pocket of the vest or other garment, the
necessary current for which may be derived from a primary or secondary battery,
or accumulator, carried upon the person.
My said invention is intended for use by omnibus and tramcar conductors for
examining the cash received in payment of the fares, and by the inspectors when
periodically examining the tickets held by the passengers, to prevent fraud, but the
same may be adapted for use by any other person or persons who may periodically
require a low candle power illuminant, such for instance as railway passengers
when the ordinary light provided in the carriage is insufficient for reading or like
purposes.
For the purpose of rendering my invention perfectly clear, I have hereunto
appended a sheet of drawings in which
Figs. 1 and 2 are front and side view of a complete apparatus as constructed by
me, the former view shewing also the manner adopted by me for connecting the
same with the battery.
Figs. 3 is a vertical section of same shewing one of the methods in which I arrange
a switch for opening and closing the electric circuit.
Figs. 4, 6,
and 9 are sections similar to Fig. 3, each shewing a different method
of arranging the switch.
Figs. 5 and 7 are sections which may be regarded as taken vertically through the
centre of either of the previous figures, these being principally to illustrate the
position of the hooks for suspending the lamp, and the manner of attaching
the insulating diaphragm to the case.
Fig. 10 is a front view of an entire apparatus when constructed in the manner
shown by Fig. 9.
Fig. 11 is a front and side elevation of the form of lamp employed.
с
I carry my invention into effect by procuring the case of an ordinary open faced
self winding watch A, (or by constructing of inferior metal a case similar thereto)
in which a hole or passage a is formed in the stem 6 of the bow for the spindle of
the winding mechanism, which having been removed, I pass through a the + and
wires c d coming from the battery, one of which may be connected, electrically,
with the case A, so that this forms a conductor, while the other lead is electrically
connected to a metallic plate e, which may be screwed or otherwise fixed upon an
insulating block fixed to or upon the case A, but in practice, I prefer to fix by any
suitable means within the case A, a vulcanite or other insulating plate or
diaphram B, and upon this I fix the plate e. A second plate may be fixed in
like manner to B, not necessarily, but preferably parallel with e.
Upon the periphery of the case of a stop watch, a sliding plate or stud is
provided, which communicates with, and is used to operate the stop movement.
When such a case is employed I utilize the said plate or stud as a medium for
operating the opening and closing of the circuit, and referred to in the drawings by
the letter C. In one method of arranging the switch mechanism I attach to the
stud for form integrally therewith a curl or spring g, and to the stud of the plate C,

page_text: I connect within A a metallic plate has at Fig. 3, so that as C is moved away
from the bow the circuit is closed by the contact of h and g, and opened by the
separation thereof when C is moved in the opposite direction.
Upon the upper end of each of the plates ef a small hook i is formed, shown
more graphically by the sectional view Fig. 5, and upon these hooks is placed the
terminal eyes k of the lamp, constructed in the form shewn by the view Fig. 11,
and when so placed, the lamp, at first would stand out from the diaphragm B, as
shown by the dotted outline thereof at Fig. 5 or approximately so but when the
glass D of the watch is closed as at Fig. 1, the lamp is pressed thereby into a
vertical position, and so retained by glass D and the flexibility of the diaphragm B
as at Fig. 2, thus ensuring perfect electrical contact between the eyes k and the
hooks i, which may if necessary be further established by the use of a suitable
spring fixed upon B, the tension of which would press the lamp in a downward
direction. A suitable paper or cardboard dial, (upon which may be written or
printed an advertisement if desired) may or may not be interposed between the
lamp and the diaphragm B, in which suitable holes or apertures may be provided
for the passage or protrusion of the hooks i.
-
I do not confine myself to any particular means for making contact between the
leads and the + and terminals of the battery, this being to some extent
regulated by the construction of the battery, but I prefer to arrange that the battery
terminals shall be of such form, and sufficiently close together, as to enable me to
use a vulcanite or other plate E, having metallic studs m m', and by connecting the
free ends of the leads cd to the said studs m m³ as at Fig. 1, contact may be
quickly and easily made between m m and the terminals of the battery, so that
the use of the current may be economised by disconnecting these when the lamp is
not in use.
From the foregoing it will be easily understood that by the simple movement of
the plate C, when the lamp is connected up as stated, the current may be switched
on and off at will.
As alternative methods of arranging the switching device, I may fix upon the stud
of C a spring plate n, connected to an arm o pivotted at o¹ upon 13, and by extending
the length off, the circuit would be closed when contact was made between o and
by a like movement of C. This device is shewn at Fig. 4.
Or n and may be arranged as at Fig. 6, contact between these being in like
manner made by the movement of C.
Where cases A are used in which a sliding plate C is not provided, I may at the
same spot arrange an aperture, through which is passed a milled headed screw C",
engaging with an internally threaded plate or its equivalent p fixed upon B, the
plate being bent or curved so that contact made between this and C closes the
circuit as shewn at Fig. 8.
Or the aperture made for the passage of C1 may be enlarged and the leads cd
passed therethrough, instead of through the bow stem b, and in the bow stem b an
internally threaded plate r may be fixed, through which passes a screws connected
to and operated by a bow head F, such as usually employed in self winding watches,
contact between s and the plate closing the circuit as before. This arrangement
will be fully understood by reference to the sectional view Fig. 9, Fig. 10 being a
front view of the apparatus when complete.
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
1st. In combination with any suitable type of primary or secondary battery, and
low voltage electric incandescent lamp, the construction and use of a holder for the
said lamp, which may be, or resemble, an ordinary open faced watch case, in which
suitable mechanism is provided, operating as a switch for opening and closing the
circuit, actuated by any of the methods herein set forth, substantially as and for
the purposes herein described and shewn by the appended drawings.

page_text: 2nd. In combination, the construction and use of a case A, in which are metallic
plates ef, each provided with a hook i, for receiving and holding the terminals k of
an electric incandescent lamp, the said plates being fixed to, and insulated from A,
or to and upon an insulating diaphragm B fixed in A, and to either of which may
be connected the + or - lead c of a primary or secondary battery, the opposite
lead a being electrically connected to A, both passing through the bow stem b. The
manner of closing and opening the electric circuit by means of the plate C, making
contact through h with gf, substantially as and for the purposes herein described
and shewn by Figs. 1. 2. 3. 5 and 7 of the appended drawings.
3rd. In combination with the device set forth in the preceding claim, the alternative
method of closing and opening the circuit by means of the plate C making contact
through n and o with the plate f substantially as described and shewn by Fig. 4.
4th. In combination with the device set forth in the 2nd claim hereof, the
alternative method of closing and opening the circuit, by means of the plate C,
making contact through a spring plate n with the plate substantially as described
and shewn by Fig. 6.
5th. In combination with the device set forth in the 2nd claim hereof, the
alternative method of closing and opening the circuit by substituting a screw C¹ in
lieu of the plate and stud C, making contact with the plate f, substantially as herein
described and shewn by Fig. 8.
6th. In combination with the device set forth in the 2nd claim hereof, the
alternative method of arranging the entrance into A of the leads c d, by passing
these through an enlarged aperture hitherto occupied by the stud of the plate C or
screw C¹ and the manner of closing and opening the electric circuit by connecting
to the bow head F a screw s passing through a plate in b, and making contact
with substantially as herein described and shewn by Figs. 9 and 10 of the
accompanying drawings.
7th. In combination with the apparatus set forth in the preceding claims, the
manner of making electric contact between the leads c d and the terminals of the
primary or secondary battery employed, by the means of an insulating plate E,
having metallic studs m m', fitting into or otherwise engaging with said terminals
substantially as herein described.
Dated this 17th day of Jul, 1902
GEO. THOS. HYDE,
4, Moorfields, Fore Street, London, E.C., Agent for the Applicant.