IMPROVEMENTS IN DEVICES FOR CAUSING STRIKING CLOCKS TO REPEAT
Year: 1884

page_text: I ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex,
Engineer do hereby declare the nature of this Invention for "IMPROVEMENTS IN
DEVICES FOR CAUSING STRIKING CLOCKS TO REPEAT" 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 a very simple device readily applicable to different
kinds of clocks, especially to what are known as French clocks" or clocks with
rack striking gear, and which serves to cause the clock to repeat" the hour
last struck; this may be effected either by hand at any desired' moment, or
automatically a little while after the clock has struck say for instance after two or
three minutes or more according as to how the mechanism is arranged.
In the annexed Drawings
Figure 1 is a front elevation of my device.
Figure 2 is an edgeview thereof.
Figures 3 and 4 are front and edgeview respectively of the lever A.
Figures 5 and 6 similar views of lever B.
This device consists of two small arms or levers A. B connected with one another
by a pin at b (see Figures 1 and 2). They are attached to the pillar plate by a
screw a (Figure 1). The arm or lever A is pushed down by a pin i on the motion
wheel F and has a back spring E for returning it.
F is a wheel which transmits motion. from the minute hand to the hour hand.
The movement of the arm or lever A is communicated to lever B.
The stud d of the lever C is guided in the slot of the arm B and receives motion
therefrom so that the pin e on this lever C is lifted by the detent D of the striking
train as is the case in the ordinary working of such a clock.
The clock ordinarily works as follows.-
The Drawings show Figures (1 and 2) the mechanism at the moment when the
clock is just going to strike. At the proper moment the minute wheel F bears
with its pin i against lever A which descends and lever B is likewise pulled down.
The pin & then leaves the recess and at the same time pin k lifts the detent D
which by pin e causes the lever C to turn to the left on its arbor f.

page_text: The rack H being no longer supported by the end of the lever C falls by its own
weight and the striking train being at the same time released begins to act and
the gathering pallet c raises the rack H tooth by tooth.
When the striking train ceases to operate rack H is again retained in its normal
position by the lever C until the clock "repeats' or strikes again.
"
When this clock is to be caused to repeat then the straight end of the lever B is,
by any convenient means, drawn a little to one side (in Figure 1 this would be the
right hand side).
The pin d is thus released from the recess in B and is lifted by the edge of the
recess when the lever B is returned by the spring E.. As soon as the pin d on the
arm c is lifted the rack H falls and the striking train is released and the clock
repeats the last hour.
Having now particularly described and ascertained the nature of the said
Invention and in what manner the same is to be performed as communicated to me -
by my foreign correspondent I declare that what I claim is,
+
The application of the levers A and B and the back spring E together with the
pin on the motion wheel F to the ordinary striking mechanism of a clock to
make it repeat the last hour, as hereinbefore described;
1.
1
Dated this 96th day of February 18QA