An Improved Pulley for the Transmission of Power.
Year: 1893

page_text: Date of Application, 11th July, 1893
Complete Specification Left, 11th May, 1894-Accepted, 16th June, 1894
PROVISIONAL SPECIFICATION.
An Improved Pulley for the Transmission of Power.
I, EMILE PODVIN of Charleroi in the Province of. Hainaut in the Kingdom
of Belgium, Engineer do hereby declare the nature of this invention to be as
follows:-
My improved pulley may be made of wood or metal. Its periphery is divided
into straight planes or faces of equal length and as many of these faces as
preferred. The effect of this is to cause the belt to keep its position when at
work. The ordinary plain annular faced pulleys, after a little wear become smooth
and bright and the belt slips on them unless great tension is employed. This is
injurious to the machinery and causes resinous substances to be employed to cause
adhesion. By employing many sided pulleys as above described these evils are
avoided.
Another great advantage is that belts of hemp cotton or other material can be
used successfully on these pulleys. Pulleys made thus do not require to be turned
and are therefore economical to manufacture.
Dated this 11th dor of Tule 1902
S. S. BROMHEAD,
97, Newgate Street, London, E.C., Agent for Applicant.
COMPLETE SPECIFICATION.
An Improved Pulley for the Transmission of Power.
I, EMILE PODVIN of Charleroi in the Province of Hainaut, in the Kingdom
of Belgium 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 is designed to supply a pulley which will create a better grip or
adhesion on the part of the belt or strap, and will not need the application of
resinous or glutinous substances to prevent slipping.
My improved pulley may be made of wood or metal or any other suitable
material. Its periphery is divided into straight planes or faces of equal or varying
length and as many of these faces as preferred. The effect of this is to cause the
belt to keep its position when at work.
The ordinary plain annular faced pulleys, after a little wear become smooth
and bright and the helt slips on them unless great tension is employed. This is
injurious to the machinery and causes resinous substances to be employed to cause
adhesion. By employing many sided pulleys as above described these evils are
avoided.
Another great advantage is that belts of hemp cotton or other material can be
used successfully on these pulleys. Pulleys made thus do not require to be turned
on their peripheries and are therefore economical to manufacture.
I will now describe the invention with reference to the accompanying drawing
in which, Fig. 1 shows a side elevation and Fig. 2 a section of a pulley made in
accordance with my invention.
a, b, are planes on the periphery of the pulley which may be as drawn of
unequal length or may be uniform, and of any preferred number.

page_text: 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 :-
In a pulley for power and like purposes the formation of the periphery divided
into planes or straight surfaces as herein described and set forth.
Dated this 11th day of M 1904
S. S. BROMHEAD,
97, Newgate Street, E.C., Agent for Applicant.