Improvements in the Construction of the Movements for Repeater Watches of All Sizes.
Year: 1892

page_text: Date of Application, 5th Aug., 1892-Accepted, 8th Oct., 1892
[Communicated from abroad by BERNARD RÉBER, of Le Lode Neuchatel,
Switzerland.]
Improvements in the Construction of the Movements for Repeater
Watches of All Sizes.
I RODOLPHE ROCHAT of 119 St. John Street Road Clerkenwell in the County
of Middlesex Watch Maker 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 :-
My invention relates to improvements in the mechanism of the repeating move-
ment of repeater watches and in the arrangement of the same and consists of the
following three points namely
1. The lever working the repeating gear has its pivot point on the plate near
the centre of the watch and not on the pivot of the rack as has hitherto been
the case.
The result of which arrangement is to give an easier motion to the repeating
bolt.
2. The two hammers turn on the same rod and in the same direction one above
the other thus causing a great saving of space for example in the case of a repeater
of say No. 14 size the same wheel work can be used as for a No. 14 ordinary watch
whereas in the case of existing repeaters the hammers occupy so much space that
it is necessary to make use for that size of repeater the wheel work of a No. 10 size
ordinary watch which of course increases the cost.
3. Instead of the arrangement at present in use of placing upon the sounding
ratchet wheel a pin to which is attached a rack borne by the quarter hour fall lever
and worked by a small spring I fix a rack upon the sounding ratchet wheel and
attach to the quarter hour fall lever a hooked arm shaped so that a single strong
spring fixed to the plate and resting upon the hook of the said arm causes the
quarter hour lever to fall on the quarter hour snail piece at the same time as the
arm hooks on to the quarter hour rack.
These three improvements are shown on an enlarged scale in the drawings sent
herewith.
Figure shows the wheel work as seen after removing the dial plate and
Figure 2 shows the arrangement of the hammers in the movement as well as the
chronograph mechanism which is shown as usually combined with a repeater but
which is not the subject of the present application.
The lever A pivoted at a bears a pin b against which rests the spring B which
always brings the lever A back into the normal position shown in the drawing.
A segment "C" fixed to "A" by a pivot c slides in a slot in the plate and its
end c¹ works the pin d of rack D which turns shaft E of the sounding barrel..
F is the sounding ratchet wheel upon which I fix the quarter hour rack f to
which is attached the arm G of the quarter hour lever H. A spring J fixed to
the plate rests upon the arm G at the point g thus causing the lever H to fall on
the snailpiece I at the same time as the arm G hooks on to the teeth of the quarter
hour ratchet f.
K is the rod or axle serving as a pivot both for the hour hammer N and also for
the quarter hour hammer M the lifts of which are n and m with springs n' and m¹
P is the counter spring regulating the fall of the hammers and the position of which
can in its turn be regulated by the conical screw p the head of which is on the
movement as shown in Figure 2.

page_text: 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
1. The combination of the lever A having its pivot point upon the plate near the
centre of the watch with the spring B and the segment C working the rack D
substantially as herein described and for the purposes aforesaid.
2. The combination of the sounding ratchet wheel F bearing a rack with an
arm G pivoted on a lever H and a spring J causing at the same time the lever H
to fall on the snail piece I and the arm G to be hooked to the rack f substantially
as herein described and for the purposes aforesaid.
3. The arrangement of the two hammers M and N and their lifts m and n upon
a single rod or axle K substantially as herein described and shown in the drawings
and for the purposes aforesaid.
1000
LESLIE ANTILL,
1, Gresham Buildings, Basinghall Street, E.C., Agent for the Applicant.