Year: 1888

page_text: Date of Application, 13th Oct., 1888
Specification Accepted, 30th Nov., 1888
I, PAUL PERRET, of Chaux de Fonds in Switzerland, Watch Manufacturer '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 state-
ment, (reference being had to the accompanying drawings, and to the letters and
figures marked thereon) that is to say :-
My invention consists on the one hand in a movable arrangement of one of the pins
with which the regulator of watches is usually provided for the purpose of determining
the length of the balance spring, and, on the other hand, in an arrangement allowing
one to displace very slightly the regulator itself.
In the accompanying drawings, figures 1, 4 and 5 shew in plan, and figs. 2, 3 and 6,
in elevation, three different arrangements of regulators having a moveable pin. The
mechanism intended to slightly displace the regulator shewn in figs. 5 and 6, may
likewise be combined with any other form of regulator, as for instance with those
represented in figures 1 and 4.
The purpose of the moveable arrangement of one of the pins of the regulator is to
allow of an easy disengagement of the balance spring from these pins, without deform-
ing the spring, and further, to replace the pins exactly in their place. For this purpose
one must be able to displace one of these pins with regard to the other, and I attain
this purpose in two different ways, either by making one of the pins of the form shewn
in Figs. 2 and 3, or by fixing the same to a moveable part of the regulator, as shewn
in Figs. 4 and 5.
The pin B. being bowed or bent so as to press the balance spring against the pin A
when B is screwed down, (Fig. 2).it will be sufficient to unscrew B for half a revolu-
tion (Fig. 3) to have the pins sufficiently displaced as to disengage easily the balance
spring without deforming the same.
The pin B will be relpaced exactly in its first position when screwed down again.
In the arrangement shewn in fig. 4, the part S of the regulator R, to which is fixed
the pin B, is made flexible by means of the out cut T, and a hole C allows of pin B
being momentarily removed from A, by means of any tool introduced into C.
In fig. 5, the flexible part S of the regulator R, is made separately, and fixed to the
latter by means of a screw s. The eccentric head of screw U bears against S and
allows of the pin B being easily displaced.

page_text: 2°
The disc D, being provided with a groove, formed like a snail, may be combined
with every system of regulator in the manner shewn in figs. 5 and 6. The regulator
is provided with a pin or projection engaging in the groove d of D, and the latter
turning around a central screw will very slightly displace the regulator. The
dise D may be suitably graduated.
Having now 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
1. The moveable arrangement of the pin B of the regulator R, either by bowing
or bending the screwed pin B, as shown in Fig. 2, or by fixing the pin B to a move-
able part of the regulator, as shewn in figs. 4 and 5, substantially as and for the
purpose specified.
2. The combination of the regulator R. of whatever shape or configuration, having
a pin or projection, with a disc D having a snail-groove d, and a central screw d²,
substantially as and for the purpose specified.