AHOCKers, Letter Boxes, and Bells.
Year: 1885

page_text: AHOCKers, Letter Boxes, and Bells.
ROBERT ABRAM LEE 76 High Holborn London W.C. Electrical Engineer do
hereby declare the nature of my invention for IMPROVEMENTS IN ELECTRICAL
COMMUNICATIONS BETWEEN DOOR KNOCKERS, LETTER BOXES, AND BELLS to be as
follows:-
In carrying out my Invention I connect the knocker on the same circuit to an
Electrical Bell at a distant or any other part of the building (or it may be on the
same door as the knocker) in such manner that when the knocker is set in motion
it also rings the Bell, in order to attain this end I connect to the top end of the
knocker a covered wire and the other end of this wire I connect to the hinge of
the door, to the stud on. which the knocker decends I connect a second wire and
the end of this I connect to the other hinge of the door from these two hinges
where they are fixed to the post of the door I take the wires to the Bell and
Battery to complete the circuit; the knocker being kept away froin the stüd itself by
an insulated spring so that the current only passes when the knocker is in contact
with the stud I also carry a piece of metal connected to the stud in such manner
that when the knocker is brought up it causes connection to be made with the stud
and so forms a double contact. On the same circuit I also connect the letter box
on the door to one wire and fix a piece of metal or a spring in connection with the
second wire in such a position that when the lid of the box is pressed inwards it
makes contact with the piece of metal and rings the bell, the circuit being broken
as the lid returns to its normal position.

page_text: Knockers, Letter Boxes, and Bells.
ROBERT ABRAM LEE 76 High Holborn London W.C. 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:-
In carrying out my Invention I connect the knocker on the same circuit to an
electrical bell at a distant; or any other part of the building (or it may be on the
same door as the knocker) in such manner that when the knocker is set in motion
it also rings the bell, in order to attain this end I connect to the top end of the
knocker a covered wire and the other end of this wire I connect to the hinge of
the door; to the stud on which the knocker decends I-connect a second wire, and
the end of this I connect to the other hinge of the door; from these two hinges
where they are fixed to the post of the door I take the two wires to the bell and
battery to complete the circuit; the knocker being kept away from the stud itself
by an insulated spring, so that the current only passes when the knocker is in
contact with the stud. I also carry a piece of metal connected to the stud in such
manner that when the knocker is brought up it causes connection to be made with
the stud, and so forms a double contact; I also connect the letter box on the
door to one wire; and fix a piece of metal or a spring in connection with the
second wire, in such a position that when the lid of the box is pressed inwards it
makes contact with the piece of metal or spring and rings the bell; the circuit
being broken as the lid returns to its normal position.
In another form I make an extension piece or spring either forming part of, or
fixed to the knocker; and I fix an ordinary electrical contact push either to the
knocker or on the door, in such a position that when the knocker is raised it
depresses the button on the push and so closes circuit in the line wires to the bell.
The accompanying drawings will serve to more fully explain the nature of my
invention and in what manner it is to be performed.
Fig. I is a front elevation of a door showing external arrangement of knocker,
spring and push. Fig. II and Fig. III are side elevations of same. Fig. IV is a
back elevation of same showing arrangements of wires. In Fig. I; A, is the
knocker; B is the stud on which A decends when knocking; C is the extension
arm or spring, D is the contact push; the same letters refer to similar parts on
Figs. II; III; IV.
D¹ and D¹ are the wires to the hinges in conjunction with the push D. Fig. III,
E' and F are the wires in connection with the knocker A and the stud B. Fig. IV
E and F are the wires from the knocker A and stud B; G and H are the hinges
through which the circuit is carried from the door to the line wires. In Fig. II
and Fig. III, I is the insulated spring to keep the knocker A, off the stud when
the knocker is at rest.
Fig. IV shows the arrangement of the wires E¹ and F11 at the back of the door
for making electrical connection between the knocker A and the stud B at E and F

page_text: through the wires E' and F" to the hinges G and H and also the wires from the
contact push D to the hinges G and H through the wires D¹ and D".
'
Having now particularly described and ascertained the nature of my said
Invention, and in what manner the same is to be performed, I declare that what
I claim is:
1st An electrical contact maker in conjunction with a knocker.
2nd Fixing an insulated spring arrangement in the stud of a knocker.
3rd Making connection between a knocker and one wire of an electric bell, and
making connection between the stud of the knocker and the second wire of an
electric bell.
4th Making connection between the knocker and an electric push through a
spring or a lever either fixed to or forming part of the knocker.
•
5th An electric contact maker between a knocker and a bell whether used on a
door or in connection with any other signaling apparatus.
6th The general combination substantially as herein described.