Minute Alarum Appliance.
Year: 1890

page_text: Date of Application, 26th Nov., 1890
Complete Specification Left, 19th Aug., 1891-Accepted, 10th Oct., 1891
PROVISIONAL SPECIFICATION.
A Minute Alarum Appliance.
I, CHARLES HUELSER, of the firm of Huelser & Co. of Temple Chambers
London, International Patent Agency, do hereby declare the nature of this inven-
tion, a communication to me from abroad by Wilhelm Madel of Nieukerk, District
of Geldern, in the Empire of Germany, Manufacturer, to be as follows :-
The object of this invention is an alarum for clocks which allows of being
adjusted to a certain minute and is essentially disposed as follows:
A weight gearing is used in the known manner to impart oscillating movement to
the clapper of the alarum gong. The clapper shaft is provided with two pins which
bear by the pull of the alarum weight against two corresponding arms, one of which
is revolubly and displaceably coupled with the minute ratch disc, while the other is
in the same relation to the hour ratch disc. Said two arms are enclosed by a fork
which prevents them from participating in the revolution of the two discs referred
to. The innermost tube of the hand device carries at the outer end the minute
hand and at the inner extremity the minute wheel. It is moreover surrounded by
a tube, the outer end of which is provided with the adjusting hand for the minutes
while it carries at the inner side the minute ratch disc mentioned above. The latter
has a cavity or rest which corresponds to a nose on the contiguous surface of the
minute wheel. By a suitably placed spring the minute ratch wheel is pressed
against the minute wheel whereby said ratch wheel falls with its rest over the nose
of the minute wheel as soon as the latter occupies the corresponding position
determined by the minute alarum hand. Thereby the arm connected with the
minute ratch disc recedes from the respective pin, which therefore occurs once
an hour.
A third tube shifted on carries the hour hand and the hour wheel and is
surrounded with another tube provided with the adjusting hand for the hours and a
disc which is pressed by a suitably placed spring against the hour wheel and sinks
with a rest or cavity over a corresponding nose provided at the front surface of the
hour wheel as soon as the latter has assumed a certain position determined by the
direction of the hour alarum hand. The arm connected to the hour ratch disc then
undergoes displacement and frees the corresponding pin, which takes place once in
twelve hours. If subsequently also the arm connected to the minute ratch disc is
displaced in the afore described manner when the determined minute has arrived,
also the other pin is released and the clapper shaft is allowed to swing by the pull
of the weight.
Dated this 26th day of November 1890.
HUELSER & Co.,
Agents for Applicant.
COMPLETE SPECIFICATION.
A Minute Alarum Appliance.
I, CHARLES HUELSER, of the firm of Huelser & Co. of Temple Chambers,
London, International Patent Agency, do hereby declare the nature of this inven-
tion, a communication to me from abroad by Wilhelm Madel of Nieukerk, District
of Geldern, in the Empire of Germany, Manufacturer, and in what manner the
same is to be performed, to be particularly described and ascertained in and by the
following statement:―
This invention relates to alarums for clocks and has for its purpose to allow the
alarm device to be adjusted to a certain minute.

page_text: Referring to the accompanying drawing
Fig. 1 is a vertical section of the alarum device.
Figs. 2 and 3 are detail views, and
Fig. 4 is a front view of the alarum device.
A weight gearing A is employed in the known manner to impart oscillating
movement to the clapper d of the alarum gong. The clapper shaft & has two pins cd,
which, by the pull of the alarum weight, bear against arms ef. Arm c is revolubly
and displaceably coupled with the minute ratch disc e2 and arm f with the hour
ratch disc f. Both arms ef are enclosed in fork k and are thereby prevented from
participating in the revolution of discs e² and f. The innermost tube g of the hand
device carries at its outer end the minute hand g¹ and at its inner extremity the
minute wheel g² and is surrounded by a tube, to the outer end of which is attached
the setting hand g¹ for the minutes, while it carries at the inner side the minute
ratch disc e mentioned above. The latter has a cavity or rest corresponding to a
nose or projection of minute wheel g. Spring e¹ Fig. 2 presses the minute ratch
wheel e against the minute wheel y², so that said ratch wheel falls with its rest over
the nose of the minute wheel as soon as the latter occupies the corresponding
position determined by hand e³. Thereby arm e recedes from pin c, which therefore
occurs every hour.
A third shifted-on tube carries the hour hand h and hour wheel ¹ and. is
surrounded by another tube provided with setting hand i for the hours and with
disc f. The latter is pressed by spring against hour wheel ' and sinks with a
rest or cavity over a corresponding nose or projection on the front surface of hour
wheel h¹ as soon as the latter assumes a certain position determined by the direction
of hand i. Arm f is then displaced and releases pin d, which takes place once in
twelve hours. On the arm e being displaced in the above described manner when
the determined minute has arrived, also pin c is released, and shaft b carrying
clapper d is allowed to swing by the pull of the weight.
Having now particularly described and ascertained the nature of this inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:
In the work of a minute alarum, the connection of two arms ef adapted to
stop two corresponding pins c d of clapper shaft b, with two tubes adapted to
be displaced relatively to minute wheel g² and hour wheel by the falling of a nose
into a rest or projection, whereby the clapper shaft bis allowed to swing only
when both pins c d are released, i.e. when the respective minute as well as the
hour, to which the device is adjusted, has arrived, substantially as and for the
purpose set forth.
Dated this 19th day of August 1891.
HUELSER & Co.,
Agents for the Applicant.