AN IMPROVED WATCH
Year: 1863

page_text: PROVISIONAL SPECIFICATION left by William Edward Gedge at the
Office of the Commissioners of Patents, with his Petition, on the 31st
August 1863.-A communication from abroad by Charles Jaeger, of
Paris, in the Empire of France.
I, WILLIAM EDWARD GEDGE, of the Firm of John Gedge and Son, of
No. 11, Wellington Street, Strand, in the County of Middlesex, Patent
Agent, do hereby declare the nature of the said Invention for "AN IMPROVED
WATCH," (a communication to me from abroad by Charles Jaeger, of Paris, in
the Empire of France,) to be as follows:-
The watch the subject of this Invention is improved in its escapement in
the arrangement for winding from the pendent, and in that for setting the
hands.
These improvements will be best understood by reference to the accom-
panying Sheets of Drawing forming part of this Provisional Specification.
The detached pieces A, B, C, D, E, and F, Sheet I., are drawn ten times
their ordinary size. A, toothed steel ratchet wheel; B, toothed steel pinion;
C, wind at the pendent, composed of a, steel crown pinion with arbor (shewn
in front and side view; c, mushroom head in gold or silver fixed on the arbor

page_text: of the crown pinion by a screw; D, steel click spring; A, B, C, position of
the crown pinion of the wind C, toothing into the pinion B, which commands
the ratchet wind wheel A; E, barrel with 80 teeth, the ratchet A being
removed; F, barrel with the wind ratchet wheel in position; k steel barrel
arbor.
Figure I., Sheet I., drawn double the ordinary size, shews the movement
put together to wind from the pendent. The detached pieces K, L, M, N,
and O, Sheet II., are drawn ten times the usual size. K, toothed wheel; I,
toothed steel pin; M, steel rod with endless screw on one end, and a gold or
silver mushroom head on the other; N, steel spring; O, steel rod with gold or
silver button at one end, the other other end acting as moveable axle to the
rod M.
Figure 11., Sheet II., double the usual size, shews the mechanism for
setting the hands put together and in gear, and Figure III., Sheet II.,
(also drawn double the usual size) shews same mechanism out of gear.
Figure IV., Sheet III., (drawn twice the usual size) shews the improved
escapement put together.
Figure V., Sheet III., drawn ten times the usual size, shews a balance
wheel S', (also shewn detached in elevation; it carries on its axle a steel
plate a notched to receive the ruby lever b, which is disengaged from the plate
to give free passage to the teeth of the escapement wheel (see Figure VI.,
Sheet IV.); on the same axle and on the same side of the balance wheel is
fixed at a slight distance from the plate a, and nearly at right angle to the
ruby b, a piece of steel c (termed the disengaging finger) rounded at the end
following the circle of which the pivot is the centre. P (Sheet IV.) indicates
an anchor (seen from the under side) which acts as detent, and is composed of
four principal parts, the anchor & receiving at its two extremities or lifters
1,, a projecting ruby fixed in an inclined position on a fork f terminating on
one side by a broken circle, on the other by a square piece or drop g; on the two
side faces of this drop g are screwed two gold blades h, h, the two other extre-
mities of which end a little without the circle of the fork f. The opening pre-
sented receives the two gold blades h, h, tending to come apart, but held in
parallel direction by the two raised points, shewn i, i. These two gold blades may
come closer together if the movement requires it. The whole of the anchor is
supported by an axle j, which passes through it. Q, escapement wheel cut
with fourteen inclined and very slender teeth; R, potance or cock receiving
the upper pivots of the wheel Q and the anchor P at k, k².
A brass plate?
with two counter pivots is fixed on the potance R by a screw m.

page_text: Figure VI., Sheet IV., drawn ten times the usual size, shews the action of
the double detent escapement. At Figure VI. the balance wheel S¹ is shewn
in plan with the escapement wheel Q and the anchor P with its fork f in their
respective position when the escapement is on the dead point.