An Improved Manufacture of Compensating Balance-wheel for Watches and Clocks.
Year: 1887

page_text: Date or Application, 8th Oct., 1887
Complete Specification Left, 4th July, 1888
Complete Specification Accepted, 10th Aug., 1888
PROVISIONAL SPECIFICATION.
An Improved Manufacture of Compensating Balance-wheel for
Watches and Clocks.
I, EDOUARD GOLAY, of Geneva, in Switzerland, Watch-maker, do hereby declare
the nature of this Invention, to be as follows:-
My Invention relates to an improved manufacture of non-magnetic and un-
oxidisable compensating balance-wheels for watches and clocks.
The difficulty of obtaining non-magnetic balance-wheels arises from the rarity of
non-magnetic metals having the required qualities to make a good working
compensating balance-wheel.
These qualities are the following:
1. For the interior metallic ring or band of the balance wheel: the same degree
of dilatability as steel. This metal must, in addition, have nearly the same specific
gravity as steel, and it must have a great elasticity. My alloy, as hereinafter
specified, possesses all these qualities and is, besides, non-magnetic and unoxidisable..
2. The metal forming the external ring or band of the balance-wheel must have
the same dilatability as brass and a perfect homogeneousness. It must, besides, be
capable of being soldered to the interior metallic ring or band without melting the
same. My alloy answers all these requirements, and is less oxidisable than brass.
Now, my Invention consists in the combination of two alloys which enables me to
manufacture a completely compensating balance-wheel producing a perfect regulation
of the watch, and readily manufacturered as the metals are very malleable.
For this purpose I form the interior ring or band of the balance-wheel of an alloy
composed of about 40% platinum, about 35% copper, and of about 25% nickel ;
and the external ring or band of an alloy composed of about 55% silver, about 35%
zinc, and of about 10% copper.
Either of the alloys above mentioned may be combined with any other suitable
metal to form a non-magnetic and unoxidisable compensating balance wheel.
Dated this 8th day of October 1887
-
ERNEST DE PASS, Fel. Inst. P.A.,
68, Fleet Street, London,
Agent for the Applicant.

page_text: An Improved Manufacture of Compensating Balance Wheel for
Watches and Clocks.
I, EDOUARD GOLAY, of Geneva, in Switzerland, Watchmaker, 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, that is
to say:
My invention relates to an improved manufacture of non magnetic and un-
oxidisable compensating balance wheels for watches and clocks.
The difficulty of obtaining non magnetic balance wheels arises from the rarity of
non magnetic metals having the required qualities to make a good working
compensating balance wheel.
These qualities are the following:-
1st. For the interior metallic ring or band of the balance wheel: the same degree
of dilatability as steel. This metal must, in addition, have nearly the same specific
gravity as steel, and it must have great clasticity. My alloy, as hereinafter specified,
possesses all these qualities and is, besides, non magnetic and unoxidisable.
2nd. The metal forming the external ring or band of the balance wheel must have
the same dilatability as brass, and a perfect homogeneousness. It must, besides, be
capable of being soldered to the interior metallic rim without melting the same. My
alloy answers all these requirements, and is less oxidisable than brass.
Now my invention consists in the combination of two alloys which enables me to
manufacture a completely compensating balance wheel producing a perfect regulation
of the watch or clock and readily manufactured as the metals are very malleable.
j
For this purpose I form the interior ring or band of the balance wheel of an alloy
composed of about 40% platinum, about 35% copper, and of about 25% nickel
and the external ring or band of an alloy composed of about 55% silver, about 35%
zinc, and of about 10% copper.
Either of the alloys above mentioned may be combined with any other suitable
metal to form a non magnetic and unoxidisable compensating balance wheel.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is
1st. The combination of the two specified alloys to form a non magnetic and
unoxidisable compensating balance wheel for watches and clocks and in or about the
.proportions specified.
2nd. The combination of either of the specified alloys with any other metal to
form a non magnetic and unoxidisable compensating balance wheel for watches and
clocks.