IMPROVEMENTS IN CARRIAGE CLOCKS
Year: 1853

page_text: PROVISIONAL SPECIFICATION left by Grignon Meusnier at the
Office of the Commissioners of Patents, with his Petition, on the
31st August 1853.
("Void by reason of notice to proceed not having been given within the
time prescribed by the Act.)
I, GRIGNON MEUSNIER, of Paris, in the Empire of France, Clock
Manufacturer, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN CARRIAGE CLOCKS" to be as follows:-
My Invention relates to improvements in the arrangement of the
works of portable clocks, and consists, firstly, in the application of the
circular escapement, whether of the duplex, cylindrical, or any other
kind, fixed on 'the front of a round or square movement, the front plate
of which is cut through so as to expose the escapement and a portion
"of the works to view. Secondly, the application of an alarm or chime,
the key or arbor of the barrels of which is placed above the Figure 6,
of the circle of hours, and the construction of the alarum simplified.
Thirdly, actuating wheelwork to shew the day of the week, month, and
year by means of the chime or alarm barrel. The improvements are
shewn by the Figures ou the accompanying Drawing. The axis of the
pendulum is placed between the pieces of metal marked A, A, Figure 1,
$

page_text: the lower one of which is secured to the plate B, by means of a screw.
The foot of the escapement shaft communicates with the ratchet wheel
C, giving it the necessary impulse. The part marked D, being on a
level with the dial, the pendulum, the spiral spring of the same, and
the ratchet wheel can be seen, affording every facility for regulating
the time-piece by turning the hand towards the letter indicating fast or
slow. The ratchet wheel C, is independent of the escapement itself,
and is fixed on the interior of the plate, as well as the other wheels of
the movement. Figure 2, represents the clock movement complete.
A, is the escapement; B, B, the two barrels of the movement and
chime. The movement barrel has one hundred teeth, and gears with
a pinion of eight teeth, upon which is fixed the wheel C, which has
eighty teeth. At the other end of the pinion shaft and on the outside of
the plate is fixed in close contact (or so as to rub) the conducting
wheel of the hands D, which is in gear with a wheel having twenty-five
teeth, and two with pins for the chime movements. The wheel D, is
mounted on a pinion of twelve teeth, in gear with the hour wheel E,
which has sixty teeth. Upon this hour wheel is fixed the disc which
causes the alarum or chime to be liberated, and above which is the
alarum or chime dial, which may be turned by hand and placed at
the hour a person may desire the alarum to be brought into action.
The piece G, is the liberator of the alarum. I, is the trigger, and I,
the winder; J, is a wheel of twenty-four teeth, gearing with the wheel
on the barrel of the chime. The end of the axle of this wheel is
adjusted to a square pin on the helical spring. causing the date to jump
or shift. K, is the second movement wheel of eighty-four teeth and
pinion of eight. I, the third movement wheel of seventy teeth and
pinion of seven. M, a split ratchet wheel having fifteen teeth for an
escapement, with a cylindrical, duplex, or other spring pinion of seven.
Figure 3, represents the arrangement for shewing the date, which
adapts itself to the movement above. A, is a wheel of seven teeth for
shewing the days of the week; B, one of thirty-one teeth for the days
of the month; C, one of twelve for indicating the months; D, a crank,
which causes the wheel of the months to jump by means of a pin
driven in the wheel B; E, E, E, springs pressing on the wheels A, B, C, .

page_text: causing them to jump when required. F, a crank spring, resting on a
polished metal square; G, a spring pressing on the arm H, and causing
the wheels A, B, to jump. Figure 4, is a section of part of the works
connected with the alarm or chime. A, is the hour hand; B, the alarum
dial; C, a disc; D, the "detentillon;" E, the detent, fixed to the shaft
of the hammer; F, the hour wheel; G, the minute wheel; H, the
plate. Figure 5, represents the barrel ratchet wheel of thirty-five
teeth, which is placed in the movement of the second Figure between
the back plate and the clapper. Figure 6, represents the dial wheel,
the hour hand, and the awaking dial. Figure 7, represents the alarum
mechanism applied to an eight day time-piece, that is, without the
clockwork or chime. The alarum barrel A, and the stop or catch B,
are placed in the interior of the plate, the other parts being arranged
as shown in the Drawing. I do not confine myself to the precise
details herein described, but substantially the above is a description of
my Invention.