IMPROVEMENTS IN ELECTRIC ALARM ATTACHMENTS FOR CLOCKS AND SIMILAR APPARATUS
Year: 1884

page_text: I GEORGE MOORE of Villa Mona 35 Cressingham Road Lewisham in the County
of Kent, Mechanical Engineer, do hereby declare the nature of said Invention
for "IMPROVEMENTS IN ELECTRIC ALARM ATTACHMENTS FOR CLOCKS AND SIMILAR
APPARATUS" to be as follows:-
According to my Invention electric alarm attachments for clocks and similar
apparatus are so designed that the operation of stopping the alarm when it goes
off at the predetermined time one morning, sets the said alarm for the corresponding
time the next morning.
The said attachment, according to my Invention, comprises a cam or dise so
connected to and operated by, the clockwork mechanism that it makes a complete
revolution once in every forty eight hours and that its position can be adjusted
without affecting the said clockwork mechanism. Two levers are so arranged that
two of their ends bear at diametrically opposite points on the before mentioned
cam or disc and so that as the cam or disc rotates, the said ends of the levers are
alternately (at intervals of twenty four hours) actuated by a notch or its mechanical
equivalent in or on the cam or disc, the said ends of the levers being kept in
contact with the cam or disc by the weight of the levers aided if necessary by
springs or weights. The other or opposite ends of the levers carry insulated contact
pieces electrically connected to one another and to one pole of a battery and these
contact pieces are caused, when the levers are operated by the said notch or its
equivalent, to make contact, each once in every forty eight hours with one of two
insulated contact pieces electrically connected respectively to two insulated contact
pieces of a switch, either of which latter contact pieces can be electrically connected,
at pleasure, by means of the said switch, to one terminal of an electric alarm
apparatus (such as a bell) whose other terminal is connected to the other pole of
the before inentioned battery. The operation of the attachment is as follows:-
The cam or disc being set, by means of any suitable device, so that it will operate
one lever at the predetermined time, that contact piece of the switch which is
electrically connected to the contact piece with which that lever makes contact,
is electrically connected, by means of the switch to the terminal of the alarm
apparatus as above described. On the alarm going off, the person for whom the
[Pin B11

page_text: alarm was intended operates the switch putting the other contact piece of the
switch in electrical connection with the terminal of the alarm apparatus, thus
stopping the alarm and setting it for the corresponding hour the next day when
the other lever will come into operation.
As is evident, the attachment as described above may be variously modified 5
without departing from the nature of my said Invention; for instance the alarm
may be arranged to be operated at any other suitable. interval of time instead of
every twenty four hours.

page_text: I GEORGE MOORE of Villa Mona, 35 Cressingham Rd, Lewisham in the County
of Kent, Mechanical Engineer do hereby declare the nature of my Invention
for IMPROVEMENTS IN ELECTRIC ALARM ATTACHMENTS FOR CLOCKS AND SIMILAR
APPARATUS and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:-
According to my Invention electric alarm attachments for clocks and similar
apparatus are so designed that the operation of stopping the alarm when it goes
off at the predetermined time one morning, sets the said alarm again for the same
time next morning.
This attachment according to my Invention comprises a cam or disc (A. (see
Drawing)) so connected by properly proportioned toothed or friction wheels, to
and operated by any ordinary clockwork mechanism, that it makes one complete
revolution every forty-eight hours, and its position can be adjusted in the ordinary
manner without affecting the said clockwork mechanism.
Two levers (B and B¹) are so arranged that two of their ends bear at
diametrically opposite points on this cam or disc (A) so that as it rotates, the
ends of the levers (B and B¹) are alternately (at intervals of twenty-four hours)
actuated by a notch or its mechanical equivalent in or on the cam or disc (A).
The said ends of the levers (B and B¹) being kept in contact with the cam or
disc (A) by the weight of the levers, aided if necessary by springs or weights.
The opposite ends of the levers (B and B¹) carry insulated contact pieces (C and
C") electrically connected to one another and to one pole (D) of a battery (J)
and these contact pieces (C and C¹) are caused, when the levers are operated by
the notch in the cam (A) to make contact, each, once in every forty-eight hours,
with one of two insulated contact pieces (E and E¹) electrically connected
respectively to two insulated contact pieces (F and F¹) of a switch (G), either of
which latter contact pieces can be electrically connected at pleasure, by means
of the said switch (G) to one terminal of an electric alarm apparatus such as a
bell (H) whose other terminal is connected to the other pole (I) of the battery (J).
The operation of the attachment is as follows:-
The cam or disc (A) being adjusted as before stated by means of a suitable
device so that it will operate one of the levers (say B) at the predetermined time,
that contact piece (F) of the switch (G) which is electrically connected to the
contact piece (E), with which the lever (B) makes contact is electrically connected
by means of the switch (G) to the terminal of the alarm apparatus (H) as above
described.
On the alarm going off, the person for whom it was intended operatest he
switch (G) putting the other contact piece (F¹) in electrical connection with the
terminal of the alarm apparatus (H) thereby stopping the alarm and setting it
for the corresponding time the next day, when the other lever (B¹) will be operated
by the cam (A) in like manner.
As is evident the attachment as described above may be variously modified
without departing from the nature of my said Invention; for instance the alarm
may be arranged to be operated at any other suitable interval of time instead of
every twenty-four hours.
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:-
1 The addition of a pair of properly proportioned toothed or friction wheels to
the mechanism of any ordinary clock as and for the purpose described.

page_text: 2nd The arrangement of duplicate levers (B and B¹) with a cam or disc (A) (the
said cam or disc being fixed to the larger of the said wheels) and the levers
being properly connected to electrical terminals as shewn and described.
3rd The application of an electrical switch (G) having three terminals so as to
join up the wires from the aforesaid levers (B and B¹), battery (J), and alarm (H),
as is clearly shewn in the Drawing and described in the context.
Dated this 13th day of September 1884.