Year: 1894

page_text: Date of Application, 1st Nov., 1894
Complete Specification Left, 31st July, 1895-Accepted, 1st Nov., 1895
A communication to me from HELLMUTH AHLGRIMM, of Roschuowo, Pcsen, in
the Empire of Germany, Distillery Manager.
I, EDMUND EDWARDS, of the Firm of Edwards and Co., Patent Agents and
Engineers, of 65 and 66, Chancery Lane, in the County of Middlesex, do hereby
declare the nature of this invention to be as follows:-
The alarum clock, which forms the subject of this invention, consists of a
pendulum clock of an ordinary construction, but having a moveable and adjustable
weight upon the pendulum rod, so arranged that by adjusting it to the proper
position by means of a scale upon the rod, the speed of the clock can be so varied
that the alarum is caused to sound after any desired period of time.
The apparatus consists of a case in which the mechanism is contained, and
having fixed outside it an alarum bell. The pendulum is suspended to the upper
part of the case in the usual way, but its rod is continued through au opening in
the top, and is provided with a sliding weight which can be adjusted and fixed in
any desired position upon the rod, the latter having upon it a scale of ininutes or
other desired periods of time, properly arranged to determine the speed of the
pendulum when the sliding weight is adjusted, upon the well-known principle that
the normal speed of oscillation of a pendulum can be reduced by attaching a weight
to a continuation of the pendulum rod above the centre upon which it turns.
The pendulum is operated by a mainspring and a train of wheels in the usual
way, and in order to prevent over-winding a pin upon the spring arbor engages
with notches cut partly round the circumference of a loose disc turning upon a
pivot, each revolution of the arbor turning the disc round one notch, until the last
of the notches is reached, when the winding must cease.
Another train of wheels actuates a hammer which rings the bell when the train
is released. It is operated in the usual way by a mainspring, and is held by a
detent until the latter is released at the previously determined time.
Both springs being wound up, the sliding weight is then adjusted by the scale to
the proper position upon the prolonged pendulum rod, corresponding with the time
which is to elapse before the alarum rings.
By this means, according to the position of the sliding weight, the clock
evidently goes quicker or slower. If, for instance, the weight be adjusted to
"30" minutes on the scale, the clockwork is so arranged that in each 30 minutes
the wheel carrying the releasing pin makes one revolution, and the striking train is
released and the alarum rung.
The improved adjustable alarum is especially adapted for establishments in which
at regular intervals certain operations have to be repeated; and it is also useful for
hotels, schools, and the like.
1. 100.4

page_text: A communication to me from HELLMUTH AHLGRIMM, of Roschnowo, Pusen, in
the Empire of Germany, Distillery Manager.
I, EDMUND EDWARDS, of the Firm of Edwards and Co., Patent Agents and
Engineers, of 65 and 66, Chancery Lane, in the County of Middlesex, 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, and accompanying drawing, that is to say :—
The alarum clock which forms the subject of this invention consists of a
pendulum clock of an ordinary construction, but having a moveable and adjustablo
weight upon the pendulum rod, so arranged that by adjusting it to the proper
position by means of a scale upon the rod, the speed of the clock can be so varied
that the alarum is caused to sound after any desired period of time.
In the accompanying drawing, which is in illustration of the invention,
Figure 1 is a longitudinal section of the improved alarum clock;
Figure 2 is a cross section of the same, and
Figures 3 and 4 arc details.
Similar letters refer to the same parts in the several figures.
The apparatus consists of a case a in which the mechanism is contained, and
having fixed outside it an alarum bell. The pendulum e is suspended to the
upper part of the case in the usual way, but its rod is continued through an opening
in the top, and is provided with a sliding weight c', which can be adjusted and
fixed in any desired position upon the rod, the latter having upon it a scale of
minutes or other desired periods of time, properly arranged to determine the speed
of the pendulum when the sliding weight is adjusted, upon the well-known
principle that the normal speed of oscillation of a pendulum can be reduced by
attaching a weight to a continuation of the pendulum rod above the centre upon
which it turns.
The pendulum is operated by a main spring fixed upon an arbor o, and to
prevent overwinding a pin o¹ upon the spring arbor o engages with notches on a
loose disc o turning upon a pivot; each revolution of the arbor turning the disc
round one notch until the last of the notches is reached, when the winding must
cense.
Upon the arbor o is fixed a toothed wheel gearing with a toothed wheel m.
Upon the arbor of this wheel is fixed a toothed wheel gearing with a toothed
wheel. The arbor of this wheel is also provided with a wheel i gearing with a
wheel. The wheel operates a pin-wheel e by means of the wheels y,, and
thus by means of the disc (Figures 1 and 3) the pendulum e is oscillated.
The striking movement may be of any suitable construction and actuates n
hammer to which rings the bell when the train is released. It is operated in the
usual way by a mainspring upon a shaft and is held by a detent until the
latter is released at the previously determined time, by means of a pin ♬ of
the wheel /.
Both springs being wound up, the sliding weight c is adjusted by the scale to
the proper position upon the prolonged pendulum rod c, corresponding with the
time which is to clapse before the alarum rings.
By this means, the cluck evidently goes quicker or slower, according to the
position of the sliding weight. If, for instance, the weight be adjusted to 30 minutes
on the scale, the clockwork is so arranged that in each 30 minutes the wheel
carrying the releasing pin makes one revolution, and the striking train is
released and the alarmin rung.

page_text: The improved adjustable alarum is especially adapted for factorios or establish-
ments in which at regular intervals certain operations have to be repeated, and it is
also useful for hotels, schools, and the like.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, 1 declare that what
I claim is :-
In alarum clocks the method of altering the speed of oscillation of the pendulum
by changing the position of a weight upon the pendulum rod, so that after the lapse
of a period determined by means of a scale upou the pendulum rod a signal is
sounded, substantially as described and illustrated.
Dated this 11th day of July 1895.
EDWARDS & Co.,
65 and 66, Chancery Lane, London, Agents for the Applicant.