AN IMPROVEMENT OR IMPROVEMENTS IN CERTAIN KINDS OF WATCHES.
Year: 1882

page_text: LETTERS PATENT to John Alfred Knott of Balsall Heath in the County of
Worcester Chronometer Maker for an Invention of "AN IMPROVEMENT OR
IMPROVEMENTS IN CERTAIN KINDS OF WATCHES.'
"
PROVISIONAL SPECIFICATION left by the said John Alfred Knott at the
Office of the Commissioners of Patents on the 7th October 1882.
JOHN ALFRED KNOTT of Balsall Heath in the County of Worcester Chronometer
Maker "AN IMPROVEMENT OR IMPROVEMENTS IN CERTAIN KINDS OF WATCHES
"
My invention has reference to such watches as are commonly called lever watches
that is watches having escapements of the kind commonly known as lever escape-
ments and consists of the improvement or improvements hereinafter described in
the "banking studs" or "banking pins" by which the vibratory motion of the lever
of the escapement is limited.
Banking pins and banking studs as ordinarily constructed are unprovided with
any means of adjustinent and in the original manufacture of the watch the
determination of the proper position of the said banking pins or studs is attended
with difficulty. In case of injury to the banking pins or studs their replacement
in the required position is difficult.
In place of banking pins and banking studs of the ordinary kind I employ a
banking stud constructed in the following manner I make the said banking stud of
a figure somewhat resembling the letter U and fix it flat upon the plate by
screwing and steady pins. Near the end of each arm of the banking stud I drill a
hole and tap it with a screw thread. The said holes are in the same line that is
parallel with the plate. In each of the said holes I fit a screw by screwing which
screws to a greater or less distance respectively into the said holes their ends may
be made to project to the required distance through the arms of the stud. The end
of the lever of the escapement vibrates between the ends of these screws and by
the action of the said screws the range of motion of the said lever as well as the
particular position of its path may be adjusted with the extremest nicety.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said John Alfred Knott in the Great Seal Patent Office on the
21st March 1883.
""
JOHN ALFRED KNOTT of Balsall Heath in the County of Worcester, Chronometer
Maker AN IMPROVEMENTS OR IMPROVEMENTS IN CERTAIN KINDS OF WATCHES
My invention has reference to such watches as are commonly called lever watches,
that is, watches having escapements of the kind commonly known as lever
escapements, and my said invention consists of the improvement or improvements
hereinafter described in the "banking studs or "banking pins" by which the
vibratory motion of the lever of the escapement is limited.
"
Banking pins or banking, studs as ordinarily constructed are unprovided with
any means of adjustment and in the original manufacture of the watch the
determination of the proper position of the said banking pins or studs is attended
with difficulty. In case of injury to the bauking pins or studs their replacement
in the required position is difficult.
In place of banking pins and banking studs of the ordinary kind I employ n
banking stud constructed in the following manner I make the said banking stud
of a figure somewhat resembling the letter U and fix it flat upon the plate by
screwing and steady pins. Near the end of each arm of the banking stud I drill a
hole and tap it with a screw thread. The said holes are in the same line, that is,
parallel with the plate. In each of the said holes I fit a screw, by screwing which
screws to a greater or less distance respectively into the said holes their ends may
be made to project to the required distance through the arms of the stud. The end
of the lever of the escapement vibrates between the ends of these screws and by
the action of the said screws the range of motion of the said lever as well as the
particular position of its path may be adjusted with the extremest nicety.
Figure 1 of the accompanying Drawing represents in plan a portion of a lever
watch provided with a banking stud constructed according to my invention;
Figure 2 represents in side elevation, the banking stud with a portion of the watch
plate and Figure 3. is a section of the banking stud taken through the fixing screw
and steady pins. The said Figures 1. 2 and 3 are drawn to a large scale in order
that the construction of my invention may be the better understood.
a is the plate of the watch and b, b is the lever, c is the escape wheel, the said
parts abb and a being of the ordinary kind and constituting no part of my inven-
tion. The banking stud constructed according to my invention is marked d, d', d³,
and has the general figure of the letter U. That is to say, it consists of the baso
part d from the ends of which two parallel arms i², dat right angles to the said
base part d, project. The said banking stud d, d, d is fixed flat upon the plate u
of the watch by the middle screw pine passed through a hole in the middle of the
part d the said pin taking into a screwed hole tapped in the watch plate a as best
seen in the section Figure 3. The said banking stud is also steadied and its
position on the watch plate a determined by the pins f f rivetted or screwed to the
plate a, the end holes in the part d being dropped upon the said pins ff before the
banking stud is fixed by the middle screw pin e.
Near the end of each of the arms d³, d² of the banking stud a hole is drilled and
tapped with a screw thread. These tapped holes are marked g, g and are situated
opposite one another or in the same line. In each of the holes a screw his
fitted. By screwing these screws to a greater or less distance respectively in the
anid holes g their ends may be made to project to the required distance through
the arms d², d of the stud as represented in Figure 1. The end 6 of the lever b; b

page_text: of the lever escapement vibrates between the ends of the screws h, h and by their
action the range of motion of the said lever and the particular position of its path
may be adjusted with the extremest nicety.
Banking studs constructed according to my invention are easily removed from
the watch for cleaning and replaced after cleaning.
Having now described the nature of my invention and the manner in which the
same is to be performed I wish it to be understood that I claim as my invention of
"An improvement or improvements in certain kinds of watches
"
The construction of the adjustable banking studs of lever watches herein before
described and illustrated in the accompanying Drawing; that is to say, an adjustable
banking stud for watches having lever escapements, consisting essentially of the
base or fixing part & secured flat upon the plate. of the watch, the said part d
having at its ends parallel arms d², d provided with adjusting screws h, h between
the ends of which screws h, h one end of the lever of the es apement vibrates
substantially as described and illustrated.
In witness whereof I the said John Alfred Knott have hereunto set my
hand and seal this Twentieth day of March in the year of our Lord
one thousand eight hundred and eighty three
0 Witness,
THOMAS SEWELL
97 Grant St.
Birmingham
JOHN ALFRED KNOTT (L.S.)