Improvements in and connected with Watch Dials.
Year: 1894

page_text: Date of Appl cation, 29th June, 1894
Complete Specification Left, 28th Mar., 1895-Accepted, 4th May, 1895.
PROVISIONAL SPECIFICATION.
Improvements in and connected with Watch Dials.
I, CALEB KIMBALL COLBY, of 11 John Street, in the City of New York,
United States of America, Manufacturer, do hereby declare the nature of this
invention to be as follows:-
This invention relates to watch dials, and it consists, as to the first part, in the
arrangement of the hour and minute graduations on the dial in a circle within the
circle of hour numerals and of less diameter than the latter circle. Where there
is a seconds dial on the watch dial, the seconds graduations will also be arranged
in the same manner as those for the hours and minutes, that is to say, within the
circle of seconds numerals. And where the seconds dial is placed at the lower
part of the main dial, so that its circle cuts that for the hour and minute gradua-
tions, the part of the circle of hour and minute graduations about its lower part
will be concentric with the second's dial.
The second part of the invention consists in placing on the face of the dial
within the space bounded by the hour and minutes graduations, numerals to
indicate to the person inspecting the dial the rate of speed per hour at which a
railway train is moving when the time required to travel one mile is known.
These numerals will preferably be in the forms of vulgar fractions, as which
62
58
50
70'
means that if a train travels a mile in 70 seconds it is travelling at the rate of
50 miles per hour. If the train travels the mile in 58 seconds the traveller notes
on the dial the numeral by which he learns that the rate of speed is 62 miles
per hour.
In some cases the upper numeral will be a decimal fraction, as
In all cases one numeral represents the number of seconds required to travel one
mile and the other represents the number of miles travelled per hour at that rate
of speed.
Dated this 28th day of June 1894.
76.6 87-3
47' 41'
STEPHEN WATKINS,
Wolverhampton, Agent for the Applicant.
Improvements in and connected with Watch Dials.
1, CALEB KIMBALL COLBY, of No. 11 John Street, in the City of New York,
United States of America, 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 statement :-
This invention relates to watch dials, and it consists, as to the first part, in the
arrangement of the hour and minute graduations on the dial in a circle within the
circle of hour numerals and of less diameter than the latter circle. Where there is
a seconds dial on the watch dial, the seconds graduations will also be arranged in
دوه

page_text: part of the main dial, so that its circle cuts that for the hour and minute gradua-
tions, the part of the circle of hour and minute graduations about its lower part
will be concentric with the second's dial.
50
The second part of the invention consists in placing on the face of the dial
within the space bounded by the hour and minutes graduations, numerals to
indicate to the person inspecting the dial the rate of speed per hour at which a
railway train is moving when the time required to travel one mile is known.
These numerals will preferably be in the forms of vulgar fractions, as which
means that if a train travels a mile in 70 seconds it is travelling at the rate of
50 miles per hour. If the train travels the mile in 58 seconds the traveller notes
on the dial the numeral - by which he learns that the rate of speed is 62 miles
62
58
70'
76.6 87.3
per hour. In some cases the upper numeral will be a decimal fraction, as 47' 41
In all cases one numeral represents the number of seconds required to travel one
mile and the other represents the number of miles travelled per hour at that rate
of speed.
The drawing represents the dial on a somewhat exaggerated scale as compared
with an ordinary watch dial, so as to show the numerals clearly and distinctly.
The dial-plate a may be of any material, but will consist, by preference, of the
usual copper plate coated with enamel. On the face of this plate are marked the
usual hour and second dials, the numerals of which are arranged in circles, as
shown. The seconds dial will be, preferably, slightly depressed below the general
level. Within the circle of the hour numerals are arranged the hour and minute
graduation marks, b; and within the circle of the seconds numerals are arranged
the seconds graduation marks, c. Where the circle about the seconds numerals
cuts the circle of hour and minute graduation marks, as at æ, the latter marks are
concentric with the said circle about the seconds numerals.
The space within the circle of hour and minute graduation marks not occupied
by the seconds dial (if there be a seconds dial) will be occupied by the rate-of-
speed numerals, preferably arranged in horizontal rows. This table of numerals
covers speeds varying from 36 to 75 miles per hour, timed to a variation of one
75
48°
second per mile. That is, it begins with and ends with However, this is
36
100
merely a convenient limit; the table might as well begin with some other rate of
speed as 30 miles per hour, and end with 70 miles per hour, for example.
1
This table being on the dial and adjacent to the hand of the watch which
indicates seconds, it will be convenient for reference to any person riding on a
railway provided with mile posts.
The arrangement of the graduations for hours, minutes and seconds within the
circles of the hour and seconds numerals places them within the paths traversed by
the respective hands of the watch so that the time is indicated much more
accurately than when they are placed, as they usually are, exterior to the circles
of numerals.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, I claim :-
-
1. A watch dial having the hour and minute graduation marks thereon situated
within the circle of hour numerals thereon, as set forth.
2. A watch dial having the seconds graduation marks thereon situated in a
circle within the circle of seconds numerals thereon, as set forth.
3. A watch dial having a circular seconds dial which intersects the circle
occupied by the hour and minute graduation marks, and having the said marks

page_text: at this point (a in the drawing) arranged concentric to the seconds dial, as set
forth.
4. A watch dial having, in addition to the usual marks and numerals arranged
in circular form, as described, a table of numerals arranged as vulgar fractions,
one of the numerals thereof indicating the number of miles per hour a train will
travel when it requires that number indicated by the other numeral to travel one
mile, as set forth.*
Dated this 26th day of March 1895.
STEPHEN WATKINS,
Wolverhampton, Agent for the Applicant.