IMPROVEMENTS IN WATCHES
Year: 1867

page_text: LETTERS PATENT to Joseph Wilkinson and William Grimshaw, of.
Sheffield, in the County of York, for the Invention of "IMPROVEMENTS IN
WATCHES."
Senled the 20th December 1867, and dated the 25th June 1867.
PROVISIONAL SPECIFICATION left by the said Joseph Wilkinson and
William Grimshaw at the Office of the Commissioners of Patents, with
their Petition, on the 25th June 1867.
We, JOSEPH WILKINSON and WILLIAM GRIMSHAW, of Sheffield, in the County
of York, do hereby declare the nature of the said Invention for "IMPROVE-
MENTS IN WATCHES," to be as follows:-
This Invention relates more particularly to flat watches, and consists of a:
new arrangement of parts by which we dispense with bars, fuzee, chain,.
maintaining power work, fourth wheel, and pinion.
The new arrangement consists of a three-quarter pillar plate and a top plate,.
a centre wheel with hollow pinion, third wheel, escape wheel of 30 teeth,.
palletts, semi-roller and escapement, and balance cocks. The pillar plate to
have a hollow back and groove for the centre wheel, and a small groove for the
third wheel pinion head. The balance cock and pallett cock to be planted on
the pillar plate: The train to be made with a going barrel of 75 teeth. Stop
work to be planted on the back of the pillar plate, and the ratchet and check
on the top of the pottent plate; the centre wheel to have 95 teeth and hollow
pinion 10 leaves; cup and square at the back of the watch to set the hands;
third wheel of 90. teeth, and. pinion of. 6 leaves; escape wheel of 30 teeth and

page_text: pinion of 6 leaves. Pallett to escape over three or four of the teeth of the
escape wheel. The lever and table rollers to be of the ordinary description
and fixed in the usual manner.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Joseph Wilkinson and William Grimshaw in the Great
Seal Patent Office on the 24th December 1867.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, JOSEPH
WILKINSON and WILLIAM GRIMSHAW, both of Sheffield, in the County of York,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-fifth day of June, in the year of our Lord
One thousand eight hundred and sixty-seven, in the thirty-first year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto us, the
said Joseph Wilkinson and William Grimshaw, Her special licence that
we, the said Joseph Wilkinson and William Grimshaw, our executors,
administrators, and assigns, or such others as we, the said Joseph Wilkinson
and William Grimshaw, our executors, administrators, and assigns, should
at any time agree with, and no others, from time to time and at all times
thereafter during the term therein expressed, should and lawfully might
make, use, exercise, and vend, within the United Kingdom of Great Britain
and Ireland, the Channel Islands, and Isle of Man, an Invention for
"IMPROVEMENTS IN WATCHES," upon the condition (amongst others) that we,
the said Joseph Wilkinson and William Grimshaw, our executors or adminis-
trators, by an instrument in writing under our, or their, or one of their
hands and seals, should particularly describe and ascertain the nature of the
said Invention, and in what manner the same was to be performed, and
cause the same to be filed in the Great Seal Patent Office within six
calendar months next and immediately after the date of the said Letters
Patent.
NOW KNOW YE, that we, the. said Joseph Wilkinson and William
Grimshaw, do hereby declare the nature of our said Invention, and in what
manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:
This Invention relates more particularly to lever and flat watches, and
consists of a new arrangement of parts by which we dispense with bars, fuzee,
chain, maintaining power work, and fourth wheel and pinion.

page_text: The new arrangement consists of two plates as heretofore, a centre wheel
with hollow pinion, third wheel, and escape wheel of thirty teeth with their
respective pinions, palletts and staff, balance and its staff, lever and table
roller, and pallett and balance cocks. The bottom or pillar plate is to be made
with a bollow back and to have a groove in the face for the centre wheel, and
also a small groove for the third wheel pinion head. The top plate to be a
three-quarter plate. The balance cock and pallett cock to be planted on the
pillar plate, between which pillar plate and the pottence or top plate the
whole of the going work is fitted. The train to be as follows:-A going
barrel of seventy-five teeth (the stop work to be planted on the back of the
pillar plate; the ratchet and click work on the top of the pottence plate);
a centre wheel of ninety-five teeth and hollow pinion of ten leaves (the cup
and square to set the hands to be at the back of the watch); third wheel of
ninety teeth and pinion of six leaves; escape wheel of thirty teeth and pinion
of six leaves; palletts to escape over three or four teeth of the escape wheel;
the lever and table roller to be of the ordinary description, and fixed in the
usual manner. The number of the teeth in the wheels and pinions may be
varied in the train above described.
We claim the foregoing arrangement and combination of the parts; the
application of the escape wheel of thirty teeth in three-quarter plate watches;
the combination of an escape wheel of thirty teeth with a hollow centre
pinion.
We also claim the combination of the hollow centre pinion with the train
and escapement above described, by which arrangement (and dispensing
with the fuzee, chain, maintaining power work, and fourth wheel and pinion)
a medium-sized three-quarter plate watch may be produced, the construction
simplified, the durability increased, and the cost of the watch materially
reduced.
In witness whereof, I, the said Joseph Wilkinson, on behalf of myself
and the said William Grimshaw, have hereunto set my hand and seal,
this Thirteenth day of December, in the year of our Lord One thousand
eight hundred and sixty-seven.
JOSEPH WILKINSON. (L.S.)