Improvements in the Fastenings of Windows, Doors, and other similar Devices, and in Electrical Switches connected therewith.
Year: 1892

page_text: Date of Application, 14th Nov., 1892
Complete Specification Left, 14th Aug., 1893-Accepted, 23rd Sept., 1893
PROVISIONAL SPECIFICATION.
Improvements in the Fastenings of Windows, Doors, and other
similar Devices, and in Electrical Switches connected
therewith.
--
I, DAVID LIONEL SALOMONS, of Broomhill, Tunbridge Wells, in the County
of Kent, Baronet, do hereby declare the nature of my invention to be as follows:-
My invention relates to the fastenings of windows, doors, and other similar
devices, and to electrical switches connected therewith; and has for its object the
provision of means whereby the operation of the fastening device shall open and
close an electric circuit and thus serve the double purpose of fastening an electric
switch, by which means great saving is effected in the lighting of the apartment or
in the signal given and great convenience is afforded by reason of no separate or
independent switch requiring to be operated to complete or break the circuit.
This invention is applicable to the doors of water closets, and other such compart-
ments where light is required when the door is bolted and not required at other
times. It is also applicable in all cases where a room is used for short intervals,
such as stoke-holes, photographer's dark rooms, so that the bolting of the door
shall complete the circuit and produce a white or coloured light and at other times
the same will be extinguished when the use of the apartment is not required.
My invention consists in the combination of a fastening device with an electrical
switch in one mechanism so that the operation of the fastening to fasten or unfasten
the door or other device shall at the same time effect the closing or breaking of an
electric circuit for the purpose of lighting and extinguishing a lamp or ring a bell
or produce any other signal by electrical means.
.
To carry my invention into effect I may take an ordinary bolt as now made and
arrange it to engage with a special kind of plate, having electrical contacts so
arranged as to close the electrical circuit when the bolt is in its fastened position
or vice versa.
To prevent the possibility of the person operating the bolt receiving a shock I
may provide the bolt with an insulated operating knob, or equivalently insulate the
bolt from contact with the electrical circuit.
The plate into which the bolt engages may be constructed with two or more
contact pieces preferably made flexible and arranged a certain distance apart, the
whole being enclosed in a fire proof case for safety if necessary.
When the bolt enters the recess in the said plate it makes metallic contact
between the contact pieces, the current passes through the circuit, this circuit or
circuits being arranged in any of the well known methods and thus lights a lamp
or operates some other signal, and on the reverse taking place, the light is
extinguished, or the signal ceases; or the converse of the above may be
equivalently arranged. It is of course necessary that the electric leads be
insulated from the bolt plate, should the latter be made of a conducting material.
As a simple way of constructing an insulating bolt, I may turn down the
engaging end of the bolt (if of a circular section) a short distance, say about the
length it enters the bolt plate, and place thereon a shouldered ring of non-
conducting material; over this said material, I mount a metal ring, so that the
diameter of the bolt is restored to its original parallel condition, and of the same
diameter as at first.
This bolt with its insulated contact-making-end may engage with flexible contact
pieces of curved form so that the latter embraces the bolt end with plenty of
contact surface.

page_text: When the bolts and plates are fixed on the surface of the door and post, there
will be no difficulty in attaching the wires in the ordinary way, but when the plate
is mortised into its support special means may be necessary.
One way of overcoming the difficulty would be to make the mortise rather
deeper than required; to take the electric leads into the back of it and connect
them to the bolt plate before fixing the latter, by means of spirals or coiled
conductors or leads so that when putting the bolt plate into its mortise, the spiral
leads will be collapsed and will occupy the spare space at the back of the mortise.
This invention may be applied to many purposes, such as for instance, to ring a
bell if a door is bolted, as when thieves lock themselves in a room; or for lighting
a carriage so that when the occupant gets out, the light is extinguished and when
he re-enters the light is lighted again, or to light strong rooms when the doors
are open and extinguish them when the doors are closed or to give notice outside
a room when the door is bolted by lighting a light visible from the outside for
a signal.
When necessary such as at day time or other time I may use an extra supple-
mental switch in the circuit so as to break the circuit at a point other than the
bolt switch.
It is obvious that the invention may be used in connection with windows or
other devices without departing from the essence of it.
Dated this 14th day of November 1892.
FELL & WILDING,
1, Queen Victoria Street, E.C., Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in the Fastenings of Windows, Doors, and other
similar Devices, and in Electrical Switches connected
therewith.
I, DAVID LIONEL SALOMONS, of Broomhill Tunbridge Wells in the County
of Kent Baronet, do hereby declare the nature of my 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 the fastenings of windows, doors, and other similar
devices, and to electrical switches connected therewith; and has for its object the
provision of means whereby the operation of the fastening device shall open and
close an electric circuit and thus serve the double purpose of a fastening and an
electric switch, by which means great saving is effected in the lighting of the
apartment or in the signal given and great convenience is afforded by reason of the
fact that no separate or independent electrical switch requires to be operated to
complete or break the circuit.
This invention is applicable to the doors of water closets and other such
compartments where light is required, when the door is bolted, and is not required
at other times.
It is also applicable in all cases where a room is used for short intervals such as
stoke-holes photographers dark rooms, so that the bolting of the door shall complete
the circuit and produce a white or coloured light and at other times the same will
be extinguished when the use of the apartment is not required.
My invention consists in the combination of a fastening device with an electrical
switch in one mechanism so that the operation of the fastening to fasten or unfasten
the door or other device shall at the same time effect the closing or breaking of an
electric circuit for the purpose of lighting and extinguishing a lamp or ringing a
bell or producing any other signal by electrical means.
To carry my invention into effect I may take any ordinary bolt as now made and
arrange it to engage with a special kind of plate, having electrical contacts so

page_text: vice versa.
111
TANTORO position oT
To prevent the possibility of the person operating the bolt receiving a shock,
I may either provide the bolt with an insulated operating knob or equivalently
insulate the bolt from contact with the electrical circuit.
The plate into which the bolt engages may be constructed with two or more
contact pieces preferably made flexible and arranged a certain distance apart
the whole being enclosed in a fireproof case for safety if necessary.
When the bolt enters the recess in the said plate it makes metallic contact
between the contact pieces the current passes through the circuit (the circuit or
circuits being arranged in any of the well known methods) and thus lights a lamp
or operates some other signal, and on the reverse operation taking place the light
is extinguished or the signal ceases or the converse of the above conditions may be
equivalently arranged. It is of course necessary that the electric leads be insulated
from the bolt plate, should the latter be made of a conducting material.
In order that my invention may be the better understood I will now proceed to
describe as an example one simple way of carrying it into effect, in relation to the
accompanying drawings, reference being had to the letters and figures marked
thereon.
Figure 1 is a view of a bolt with its insulated contact piece on the end.
Figure 2 is a view of the door plate or box with its spring contact pieces and
electrical connections.
I take an ordinary bolt and turn down the engaging end of the bolt A (if of a
circular section) a short distance say about the length it enters the bolt plate, and
place thereon a shouldered ring B of non conducting material; over this said
material, I mount a metal ring C so that the body of the bolt is restored to its
original parallel condition and of the same diameter as at first.
This bolt A with its insulated contact making end is adapted to engage with
flexible contact pieces D D, Fig. 2, of curved form so that the latter embraces the
bolt end A with plenty of contact surface. These spring contacts are fixedly
mounted upon and insulated by pieces M from the plate G which is fixed in the
door post.
When the bolts and plates are fixed on the surface of the door and post there
will be no difficulty in attaching the wires in the ordinary way to the contact
pieces D D but when the plate is mortised into its support special means may be
necessary.
One way of overcoming the difficulty is shown in Figure and is to make the
mortice E rather deeper than required, to take the electric leads F into the recess K
at the back of it and connect them to the bolt plate G by suitable insulated binding
screws H H before fixing the plate in the mortice by means of spirals or coiled
conductors or leads J so that when putting the bolt plate G into its mortice the
spiral leads J will be collapsed and will occupy the spare space K at the back of
the mortice. The hole L on the outside face of the door plate G is for reception
of the bolt end to form the fastening so that when the bolt is shot right home the
fastening is complete and contact is made by the switch portion of the divice.
This invention may be applied to many purposes such as for instance to ring a
bell if a door is bolted, as when thieves lock themselves in a room or for lighting
a carriage so that when the occupant gets out the light is extinguished and when
he re-enters the light is lighted again, or to light strong rooms when the doors are
open, the bolt will then be varied to act the invert way & extinguish them when
the doors are closed or to give notice outside a room when the door is bolted by
lighting a light visible from the outside for a signal.
When necessary such as at daytime or other time I may use an extra supple-
mental switch in the circuit so as to break the circuit at a point other than the
bolt switch. It is obvious that this invention may be used in connection with
windows or other devices without departing from the essence of it.

page_text: Having now particularly described and ascertained' the nature of my invention
and in what manner the same is to be performed I declare that what I claim is :-
1st. A bolt having an insulated metallic, contact piece upon it in combination
with a plate or frame, adapted to engage the bolt and having mounted. thereon and
insulated therefrom contact pieces adapted to make contact with the said insulated
metallic contact piece of the bolt and means for connection of the contact pieces to
an electrical circuit..
2nd. In such a bolt switch, a bolt having a sleeve of insulating material arranged
upon its end and a contact. piece mounted upon the said insulating sleeve in
combination with a door plate or frame adapted to engage the. bolt and having
spring contact pieces, mounted on. and insulated therefrom which will. make contact
with the said contact piece of the bolt completing the electric circuit attached to
the said spring contact pieces substantially as described.
•
3rd. The arrangement and construction of an electric bolt switch substantially
as described and illustrated in the accompanying drawings.
Dated this 14th day of August 1893.
FELL & WILDING,
1, Queen Victoria Street, London, E.C., Agents for the Applicant.