Improvements in Driving Pulleys.
Year: 1891

page_text: Date of Application, 17th Dec., 1891
Complete Specification Left, 17th Oct., 1892-Accepted, 3rd Dec.. 1892
PROVISIONAL SPECIFICATION.
Improvements in Driving Pulleys.
I, RICHARD SAMUEL WOOD of 44 Hyde Street Chorlton Road Manchester in
the County of Lancaster, Engineer, do hereby declare the nature of this invention
to be as follows :-
This invention relates to pulleys employed in the transmission of power and its
object is to prevent the slipping of the driving belts.
In carrying out my invention, I form or produce upon the working surfaces of
the pulleys, grooves depressions or corrugations which extend across the face of the
pulley or from about the centre to the edges. These grooves depressions corru-
gations or recesses are preferably formed at angles of less than 45 degrees relatively
to a plane in which the axis of the pulley lies, and they may be produced by casting
rolling or other known processes, or they may be formed upon a separate sheet or
strip of metal which is thereafter secured to the rim of the pulley.
Dated this 16th day of December A.D. 1891.
WILLIAM E. HEYS,
Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Driving Pulleys.
I, RICHARD SAMUEL WOOD, of 44 Hyde Street, Chorlton Road, Manchester, in
the County of Lancaster, Engineer, 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 pulleys employed in the transmission of power and its
object is to prevent the slipping of the driving belts.
In the accompanying sheet of explanatory drawings,
Figure 1 is an elevation and Figure 2 a plan of my improved form of pulley.
In carrying out my invention I form or produce upon the working surfaces A of
the pulleys, grooves, depressions or corrugations a, a, which extend across the face
of the pulley or from about the centre to the edges. These grooves, depressions,
corrugations or recesses are preferably formed at angles of less than 45 degrees
relatively to a plane in which the axis of the pulley lies, and they may be produced
by casting, rolling or other known processes, or they may be formed upon a separate
sheet or strip of metal which is thereafter secured to the rim of the pulley by
shrinking on, riveting or other well known method for attaching one rim or band of
metal to another.
I prefer to form the grooves a, a of a spiral form made with a twist or pitch that
will permit of the pulley pattern being twisted out of the sand, and I polish the
surface of the pulley when desired by grinding, in one convenient arrangement
providing a copying slide and roller to give the necessary movement to the grinding
disc or wheel.
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 :-
:-
1. The construction of pulleys having their faces or belt driving surfaces
arranged in the form of grooves, channels or spiral depressions and proiections

page_text: substantially as and for the purposes hereinbefore described, and as illustrated in
the accompanying drawings.)
2. The construction of pulleys having their faces formed in an irregular manner
by means of a separate fluted, grooved or spirally channeled rim attached and
secured to the ordinary rim face or arms of the pulleys or wheels, substantially as
and for the purposes hereinbefore described.
Dated this 15th day of October 1892.
MARKS & CLERK,
13, Temple Street, Birmingham, Agents for Applicant.