An Improved Measuring Tape.
Year: 1891

page_text: Date of Application, 7th Dec., 1891
Complete Specification Left, 7th Sept., 1892-Accepted, 8th Oct. 1892
PROVISIONAL SPECIFICATION.
An Improved Measuring Tape.
I, HORACE BROADBENT, of the Central Iron Works, Huddersfield, in the
County of York, Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention has reference to measuring tapes, and my improvements therein
consist in marking or graduating them so that when the tape is placed around the
periphery or circumference of a wheel, the exact diameter thereof will be indicated
on the tape.
In carrying out my invention, I prefer to mark the tape on one side so as to
indicate inches, eighths of inches, and sixteenths of inches in the ordinary manner,
but on the other side of the said tape I mark or graduate it so that it indicates 3-14 16"
(which is generally understood to represent the relative proportion between the
diameter and circumference of a circle) and a multiplication of such measurement ;
therefore as 3.14 16 or thereabouts in a circle represents one inch across the centre
or its diameter, it follows that in putting a tape so marked or graduated around a
pulley that its diameter is easily ascertained.
A tape marked as above described, will be of great service to engineers,
mechanics, and others who desire to know the correct diameter and circumference of
wheels and pulleys in order to enable them to more readily ascertain and determine
upon speeds and revolutions of shafts. Such a graduated tape will also prove very
advantageous for measuring the diameter of pulleys fixed upon shafts, as in such
cases a flat measuring rule is of no use as it cannot be passed across the centre, in
addition to which the graduated tape will be a handy substitute for callipers.
Dated this 5th day of December 1891.
TASKER & CROSSLEY,
Halifax, Agents.
COMPLETE SPECIFICATION.
An Improved Measuring Tape.
I, HORACE BROADBENT, of the Central Iron Works, Huddersfield, in the
County of York, Engineer, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement :-
This invention has reference to measuring tapes, and my improvements therein
consist in marking or graduating them so that when the tape placed around the
periphery or circumference of a wheel or pulley the exact diameter thereof will be
indicated on the tape.
In carrying out my invention, I prefer to mark the tape on one side so as to
indicate inches, eighths of inches, and sixteenths of inches in the ordinary manner,
but on the other side of the said tape I mark or graduate it so that it indicates 3.14 16
(which is generally understood to represent the relative proportion between the
diameter and circumference of a circle) and a multiplication of such measurement;
therefore as 3.14 16 or thereabouts in a circle represents one inch across the centre
or its diameter, it follows that in putting a tape so marked or graduated around a
pulley that its diameter is easily ascertained.
The accompanying drawing represents one of my improved measuring tapes,
graduated as described.
A tape marked as above described, will be of great service to engineers,

page_text: mechanics and others who desire to know the correct diameter and circumference
of wheels and pulleys in order to enable them to more readily ascertain and deter-
mine upon speeds and revolutions of shafts.
Such a graduated tape will also prove very advantageous for measuring the
diameter of pulleys fixed upon shafts, as in such cases a flat measuring rule is of no
use as it cannot be passed across the centre, in addition to which the graduated tape
will be a handy substitute for callipers.
For boilermakers, coppersmiths, etc., it will be useful for enabling them to
ascertain the exact diameter that any cylindrical sheet will be when it is made
perfectly round, even though it be crooked and out of shape at the time it is
measured.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
Firstly. A tape, marked or graduated for measuring cylindrical surfaces in
manner substantially as herein described.
Secondly. A tape, marked or graduated for measuring straight lines and cylin-
drical surfaces in manner substantially as herein described.
Dated this 6th day of September 1892.
TASKER & CROSSLEY,
Halifax, Agents.