IMPROVEMENTS IN STANDS AND STRIKING MECHANISM FOR ALARUMS AND OTHER TIMEKEEPERS
Year: 1883

page_text: LETTERS PATENT to Alexander Melville Clark of the firm of A. M and
W. Clark of 53 Chancery Lane in the County of Middlesex Fellow of
the Institute of Patent Agents for an Invention of IMPROVEMENTS IN
STANDS AND STRIKING MECHANISM FOR ALARUMS AND OTHER TIMEKEEPERS
communicated to him from abroad by Denis Roussialle of Lyons, France
PROVISIONAL SPECIFICATION left by the said Alexander Melville Clark
at the Office of the Commissioners of Patents on the 26th January 1883.
ALEXANDER MELVILLE CLARK of the firm of A. M and W. Clark of 53 Chancery
Lane in the County of Middlesex Fellow of the Institute of Patent Agents
"IMPROVEMENTS IN STANDS AND STRIKING MECHANISM FOR ALARUMS AND OTHER
TIMEKEEPERS." [Communicated to him from abroad by Denis Roussialle of Lyons,
France]
This Invention relates to a striking mechanism independent of and contained in
a pedestal or support for any description of timekeeper the striking mechanism
although independent of the timekeeper, being so combined therewith as to be
actuated thereby at desired moments by a mechanism applied to and operated from
the arbor of the hands of the timekeeper.
In order that the Invention may be more readily understood I have illustrated
an example thereof in the accompanying drawing which represents in front eleva-
tion an alarum mounted on a pedestal containing a striking mechanism. A is the
alarum of which the large hand is furnished with a collar to which are fixed two
pins a all which act in turn on the releasing lever b. B is a pedestal or support
containing a striking apparatus of any suitable construction which is put in
communication with the timekeeper by means of a releasing lever actuated by the
hands
It is understood that the striking part may be of any appropriate construction
either with a locking plate, or a rack, striking quarters or repeating at will by

page_text: means of a pusher or other suitable device capable of releasing the striking gear
when pressed by the finger.
The arm by which the striking mechanism is released by the action of the hands
of the timekeeper or the pins on the hand may be rigid instead of being articulated
and may be mounted behind instead of in front of the timekeeper so as to be
actuated by any suitable device upon the hand arbor which is prolonged for the
purpose, or from the "cannon pinion" if it is desired this arm should pass up
between the dial and the frame of the timekeeper.
Instead of this arm another device may be employed which will enable detent of
the striking mechanism to be released automatically or not.
Instead of constructing the alarum or other timekeeper separate from the pedestal
containing the striking mechanism they may also be constructed in one.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Alexander Melville Clark in the Great Seal Patent Office on
the 26th July 1883.
ALEXANDER MELVILLE CLARK of the Firm of A, M, and W, Clark of 53 Chancery
Lane in the County of Middlesex Fellow of the Institute of Patent Agents
"IMPROVEMENTS IN STANDS AND STRIKING MECHANISM FOR ALARUMS AND OTHER
TIMEKEEPERS A communication to me from abroad by Denis Roussialle of Lyons,
France.
"
This Invention relates to a striking mechanism independent of, and contained in
a pedestal or support for, any description of timekeeper, the striking mechanism
although independent of the timekeeper, being so combined therewith as to be
actuated thereby at desired moments by a mechanism applied to and operated from
the hands arbor of the timekeeper.
In order that the Invention may be more readily understood, I have illustrated
two examples thereof in the accompanying drawing, Figure 1 of which represents
in front elevation an alarum mounted on a pedestal containing a striking
mechanism.
A is the alarum of which the large hand is furnished with a collar a to which
are fixed two pins a' a³ which act in turn on the releasing lever b. B is a pedestal
or support containing striking apparatus of any suitable construction which is
put in communication with the timekeeper by means of a releasing lever
actuated by the hands. The arm by which the striking mechanism is released
by the action of the hands of the timekeeper or the pins on the hand may
be rigid instead of being articulated and may be mounted behind instead
of in front of the timekeeper so as to be actuated by any suitable device
upon the hands arbor which is prolonged for the purpose, or from the "cannon
pinion if it is desired this arm should pass up between the dial and the
frame of the time keeper. Instead of this arm another device may be employed
which will enable the detents of the striking mechanism to be released automatically
or not.
"}
Instead of constructing the alarum or other timekeeper separate from the pedestal
containing the striking mechanism, it may be constructed in one therewith.
Figure 2 shows by way of example the manner in which a striking mechanism
contained in pedestal B may be rendered independent of, or connected with, the
timekeeper A by means of a lever b actuated at the desired times, say at the hours
and half hours, by the hands of a watch, alarum, clock or other time keeper. The
releasing lever b passes through an opening f in which it is capable of oscillating
from right to left by the action of one or other of the two pins a' a' on the collar a,
and of moving from left to right under the action of the flat spring i. When
lever bis moved from right to left, the arm h which engages with a pin j on
wheel k, rocks on its pivot g and releases pin j, thus allowing the wheel to turn
and releasing the striking mechanism. After the striking mechanism (which may
be of any kind) has performed its office, the spring i returns the lever from left to
right so as to bring it after the lapse of half an hour again within the influence of
the second pin a' or a² to again set the striking mechanism in operation. It will
be understood that when this mechanism operating at regular intervals for marking
the hours and half hours, is applied to an alarum, it would be entirely independent
of the alarum mechanism which would be operated in the ordinary manner.
Having described the nature of the said Invention and the manner of performing

page_text: the same,
I declare that what I claim as the Invention to be protected by the
hereinbefore in part recited Letters Patent is.
1st The stand or support provided with independent striking mechanism
applicable to timekeepers generally, and the combination of said stand and striking
mechanism with timekeepers substantially in the manner described.
In
Witness whereof I the said
the same, I declare that what I claim as the Invention to be protected by the
hereinbefore in part recited Letters Patent is.
1st The stand or support provided with independent striking mechanism
applicable to timekeepers generally, and the combination of said stand and striking
mechanism with timekeepers substantially in the manner described.
In Witness whereof I the said y
Alexander Melville Clark have hereunto
set my hand and seal this twenty third
day of July, A.D. 1883.
A M CLARK (L.S.)