Improvements in Apparatus for Testing the Strength and Elasticity of Yarn or Thread.
Year: 1888

page_text: Date of Application, 30th Oct., 1888
Complete Specification Left, 29th July, 1889-Accepted, 7th Sept., 1889
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Testing the Strength and Elasticity
of Yarn or Thread.
We, JOSEPH ALEXANDRE PIERREL and CHARLES URBAIN PIAT, both of l'resles-
St. Maurice, en Moselle (Vosges) France, Directors of Spinning Mills, do hereby
declare the nature of this invention to be as follows:-
Gur invention relates to apparatus designed for measuring the strength of yarn
or thread by indicating the precise strain which determines its rupture. The said
apparatus has moreover for its object to indicate the limit of elasticity of the yarn,
or thread that is to say, the lengthening which it will bear before the rupture.
Our improved apparatus is represented by way of example in the accompanying
drawing.
This apparatus consists of two parts, the first of which comprises a lever A, B
adapted to oscillate upon an axis a. This lever carries at its lower extremity Ba
definite weight, say for example one kilogramme.
The upper extremity A of the aforesaid lever is designed to receive the yarn or
thread to be tested and the lever is provided with teeth above its axis a so as to form
a kind of rack. A hand O is pivotted upon an axis b and serves as a detent to
prevent the return movement of the lever A B at the moment when the thread
breaks.
The second part of the apparatus comprises a vertical rod C D which is arranged
to turn upon an axis D; it is acted upon by a spring H.
In the opposite direction to that in which the said spring H acts, the rod C D is
also acted upon by a string, cord or the like attached to the same at F and passing
over a guide pulley K to a pulley or roller I the axis of which carries a crank G and
a ratchet-wheel E.
By turning the crank G the string FKI is wound upon the small pulley or
roller I so that the rod CD is inclined in the opposite direction to that in which the
spring H acts.
The thread to be tested is stretched from A to C through a distance of a meter,
passing over a small lever L which can oscillate upon the axis C. By the traction
of the thread at L, this small lever through the medium of the rods M and N, causes
a projection or tooth on the rod N to be lifted so that the ratchet-wheel E can be
turned by means of the crank G in the direction of the arrow until the thread
breaks, in which case the small lever is lifted at L as indicated in dotted lines, the
result being that the crank G is instantly caused to stop.
The two parts of the apparatus are connected with each other and supported by a
rule Y, Z or the like which keeps them at the proper distance and enables the
apparatus to be placed upon a table. This rule Y, Z can for greater convenience be
folded up.
The above described apparatus is provided with two graduated scales R and S.
Upon the former oscillates a hand or index P the axis of which carries a toothed
pinion gearing with a similar pinion secured upon the axis a. Upon the second
scale is indicated the inflection of the above mentioned rod C D..
The operation of the apparatus and the practical utility of the indications which it.
gives will be readily understood.
The thread to be tested having been fixed at A and C, the crank G is turned, so
that the thread will be streiched. The lever A, B, is thereby inclined, whilst the
hand P, actuated by the small pinion at a is inclined upon the scale R which is
provided with a graduation indicating in grammes the weight supported by the thread
at the moment when it breaks.

page_text: by means of the first part of the apparatus the exact strength of the thread will
be determined because the weight which the thread supports at the moment when it
breaks is indicated.
The second part of the apparatus is designed to measure the elasticity of the
thread, that is to say, indicate how much the latter is lengthened before it breaks.
As the rod CD inclines upon the scale S it indicates upon the graduations of the
same the distance through which the thread has been lengthened.
It is necessary to deduct from the indication given by the scale R the movement of
the lever A which is indicated on the right hand side of the said scale.
The simple apparatus above described enables the weaver and others employed in
the manufacture of spun goods, of cotton, wool, linen, jute, silk and the like, to
ascertain with mathematical exactitude the strength and the limit of elasticity of the
thread to he used, which is necessary in order to make a suitable selection from
several kinds of thread.
Dated this 30th day of October 1888
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Apparatus for Testing the Strength and Elasticity
of Yarn or Thread.
We, JOSEPH ALEXANDRE PIERREL and CHARLES URBAIN PIAT, both of Presles-
St. Maurice, en Moselle (Vosges) France, Directors of Spinning Mills, 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:-
-
Our invention relates to apparatus designed for measuring the strength of yarn or
thread by indicating the precise strain which determines its rupture.
The said apparatus has, moreover for its object to indicate the limit of elasticity of
the yarn or thread that is to say, the lengthening which it will bear before
rupture.
Our improved apparatus is represented by way of example in the drawing left with
the provisional specification.
This apparatus consists of two parts, the first of which comprises a lever A B
adapted to oscillate upon an axis a.
definite weight say for example, one kilogramme.
This lever carries at its lower extremity Ba
As shown in the drawing the upper extremity A of the aforesaid lever is designed
to receive the yarn or thread to be tested and the lever is provided with teeth above
its axis a so as to form a kind of rack. A hand O is pivotted upon an axis b and
serves as a detent to prevent the return movement of the lever A B at the moment
when the thread breaks.
The second part of the apparatus comprises a vertical rod CD which is arranged
to turn upon an axis D and is acted upon by a spring H.
In the opposite direction to that in which the spring H acts, the rod CD is also
acted upon by a string, cord or the like attached to the same at F and passing over a
guide pulley K to a pulley or roller I the axis of which carries a crank G and a
ratchet wheel E.
By turning the crank G the string F K I is wound upon the small pulley or
roller I so that the rod C D is inclined in the opposite direction to that in which the
spring H acts.
The thread to be tested is stretched from A to C through a distance of a metre
passing over a small lever L which can oscillate upon the axis C. By the traction of
the thread at L this small lever through the medium of the rods M and N, causes a
projection or tooth on the rod N to be lifted so that the ratchet wheel E can be
turned by means of the crank G in the direction of. the arrow until the thread

page_text: breaks, in which case the small lever is lifted at L as indicated in dotted lines the
result being that the crank G is instantly caused so stop.
The two parts of the apparatus are connected with each other and supported by a
rule Y Z or the like which keeps them at the proper distance and enables the
apparatus to be placed upon a table. This rule Y Z can for greater convenience be
folded up.
The above described apparatus is provided with two graduated scales R and S.
Upon the former oscillates a hand or index P the axis of which carries a toothed
pinion gearing with a similar pinion secured upon the axis a. Upon the second
scale is indicated the inflection of the above mentioned rod Û D.
The operation of the apparatus and the practical utility of the indications which it
gives will be readily understood.
The thread to be tested having been fixed at A and C the crank G is turned so
that the thread will be stretched. The lever A B is thereby inclined, whilst the
hand P, actuated by the small pinion at a, is inclined upon the scale R which is
provided with a graduation indicating in grammes the weight supported by the thread
at the moment when it breaks.
By means of the first part of the apparatus the exact strength of the thread will
be determined because the weight which the thread supports at the moment when it
breaks is indicated.
The second part of the apparatus is designed to measure the elasticity of the
thread, that is to say, indicate how much the latter is lengthened before it breaks.
As the rod CD inclines upon the scale S it indicates upon the graduations of the
same the distance through which the thread has been lengthened.
It is necessary to deduct from the indication given by the scale R the movement
of the lever A which is indicated on the right hand side of the said scale.
The simple apparatus above described enables the weaver, and others employed in
the manufacture of spun goods of cotton, wool, linen, juté, silk and the like, to
ascertain with mathematical exactitude the strength and the limit of elasticity of the
thread to be used, which is necessary in order to make a suitable selection from
several kinds of threads.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what we
claim is :-
The arrangement of apparatus for testing the strength of threads, consisting in the
combination of two articulated rods or levers upon which is placed the thread to be
tested, the first lever carrying a weight and the second inclining by the action of a
crank the pressure of which is stopped at the precise moment of the rupture of the
thread each of the said articulated rods or levers having a scale the first of which
indicates the weight under which the thread breaks and the second, the amount the
same thread has been lengthened when it reaches the point of rupture, as above
described in principle with reference to the accompanying drawing.
DL 1
301
1
Π TI 1000
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.