Improvements in Clocks.
Year: 1892

page_text: Switzerland),
Date of Application (in United Kingdom), 1st Dec., 1892
Complete Specification Left, 14th Aug., 1893-Accepted, 16th Sept., 1893
PROVISIONAL SPECIFICATION.
Improvements in Clocks.
I, JEAN JACQUES MEISTER, of 47, Rue Saint-Honoré, Paris, France, do hereby
declare the nature of this invention to be as follows:-
This invention refers especially to that kind of clock in which the escapement is
regulated by means of a balance suspended from a flexible blade or metallic ribbon,
and which balance oscillates in a horizontal plane, and alternately twists.and
untwists the said flexible blade or ribbon.
The precise regulating of the clock is obtained, on the one hand, by means of
lengthening or shortening the useful length of said flexible blade or ribbon, and
on the other, by means of applying to the said clock a horizontally oscillating
bimetallic compensation-balance like those used in precision-watches.
In the accompanying drawings,.
Fig. 1 shows a side elevation of the clock-work.
Fig. 2 is a diagrammatic view of the train of wheels.
Fig. 3 is a vertical section, and Fig. 4 a plan view of the compensation balance.
In all the figures similar letters refer to similar parts.
A is the mainspring barrel having a toothed range of 100 teeth gearing with the
pinion of a first wheel B; the pinion has 10 teeth and the wheel B, 96. The
wheel B gears with the pinion c of the wheel C, said pinion c having 8 teeth and
the wheel C, 96. The wheel C gears with the pinion d of a third wheel D, said
pinion d being provided with 8 teeth and the wheel D with 60 teeth. The latter
gears with the pinion e of the usual escapement wheel E, the pinion e having
8 teeth. The anchor F carries a fork embracing the pin g of a piece G which
grasps the flexible blade or ribbon H, to which the balance J (Figs. 3 and 4) is
suspended. The blade or ribbon is suspended from a fixed point K and traverses
a slot. (Fig. 1*) in a slider I which can be displaced vertically by means of a set
screw L. In revolving the latter to the left, or to the right, the slider is caused
to slide up or down, whereby the length of that part of the flexible blade or
ribbon which is to be twisted and untwisted by the oscillating balance is, at will,
increased or diminished with great accuracy without stopping the said oscillations
or vibrations of the balance. This balance carries a vertical projection j, the
upper part of which is forked and embraces a head h, rigidly fixed to the lower
end of the flexible or torsion-blade or ribbon H.
The above described combination of wheels produces from one to five vibrations
or oscillations of the balance per minute whence it results that with a mainspring,
substantially the same as is usually provided in clocks going from 1 to 8 days, but
having a balance performing 60 to 320 vibrations or oscillations every minute, this
improved clock will go for one year without being wound up again.
Dated this lot dox of December 1892
ERNEST DE PASS,
Chartered Patent Agent,
78, Fleet Street, London, and 6, Victoria Street, Nottingham,
Agent for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in Clocks.
I, JEAN JACQUES MEISTER, of 47 Rue Saint Honoré, Paris, France, 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, reference being had to the drawings left with my Provisional Specifi-
cation, and to the letters and figures marked thereon, that is to say :-
This invention refers especially to that kind of clock in which the escapement
is regulated by means of a balance suspended from a flexible blade or metallic
ribbon, and which balance oscillates in a horizontal plane and alternately twists
and untwists the said flexible blade or ribbon.
The precise regulating of the clock is obtained, on the one hand, by means of
lengthening or shortening the useful length of said flexible blade or ribbon, and
on the other hand by means of applying to the said clock a horizontally oscillating
bimetallic compensation balance like those used in precision watches.
In the drawings left with my Provisional Specification,
Fig. 1 shows a side elevation of the clock-work.
Fig. 2 is a diagrammatic view of the train of wheels.
Fig. 3 is a vertical section and Fig. 4 a plan of the compensation balance.
In all the figures similar letters refer to similar parts.
A is the main spring barrel having a toothed range of 100 teeth gearing with
the pinion of a first wheel B; the pinion has 10 teeth and the wheel B 96..
The wheel B gears with the pinion c of wheel C, said pinion c having 8 teeth and
the wheel C 96. The wheel C gears with the pinion d of a third wheel D, said
pinion d being provided with 8 teeth and the wheel D with 60 teeth. The latter
gears with the pinion e of the usual escapement wheel E, the pinion e having
8 teeth. The anchor F carries a fork f embracing the pin g of a piece G which
grasps the flexible blade or ribbon H, to which the balance J (Figs. 3 and 4) is
suspended. The blade or ribbon is suspended from a fixed point K and traverses
a slot i (Fig. 1*) in a slider I which can be displaced vertically by means of a set
screw L.
In revolving the latter to the left, or to the right, the slider I is caused
to slide up or down, whereby the length of that part of the flexible blade or
ribbon which is to be twisted and untwisted by the oscillating balance is increased
or diminished at will with great accuracy without stopping the said oscillations or
vibrations of the balance. This balance carries a vertical projection j, the upper
part of which is forked and embraces a head h rigidly fixed to the lower end of the
flexible or torsion blade or ribbon H.
Instead of the mainspring barrel A, I may provide a wheel having 100 teeth the
axis of which may be acted upon by means of a weight suspended by means of a
chain, or gut cord, from a drum or pulley fixed to the said axis, or connected to it
by means of a suitable click device.
The balance J may be provided with 12 screws instead of 10, as shown, or with
any other suitable number thereof.
The above described combination of wheels produces from one to five vibrations
or oscillations of the balance per minute, whence it results that with a mainspring
substantially the same as is usually provided in clocks going from one to eight
days, but having a balance performing 60 to 320 vibrations or oscillations every
minute, this improved clock will go for one year without winding up.

page_text: Having thus particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
The improved annual clock having its parts arranged and combined to operate
substantially as hereinbefore described.
Dated this 14th day of August 1893.
ERNEST DE PASS,
Chartered Patent Agent,
78, Fleet Street, London, and 6, Victoria Street, Nottingham,
Agent for the Applicant.