Improvements in Pullies.
Year: 1893

page_text: Date of Application, 10th Jan., 1893
Complete Specification Left, 10th Nov., 1893-Accepted, 23rd Dec., 1893
PROVISIONAL SPECIFICATION.
Improvements in Pullies.
I ALEXANDER GUILD of 17, Summerfield Terrace, Aberdeen, Scotland,
Engineer, do hereby declare the nature of this invention to be as follows:-
-
This invention relates to improvements in pullies whereby they will be lighter
and stronger than heretofore.
According to this invention I make the pullies with tubular arms or spokes and
I also turn the rims of the pulley inwards so as to form an inside flange in order to
strengthen such rim.
One way of carrying out this invention is to fix brackets round the rim of
pulley inside having screw holes in such brackets to receive the screwed ends of the
tubular spokes the other ends of said spokes are screwed into suitable screwed holes
in the boss of pulley. I propose to have a right handed thread at one end of the
spokes and a left handed thread at the other end the female threads in the brackets
and in the rim and boss of pulley being cut so as to correspond with the threads on
the spokes.
Dated this 10th day of January 1892.
BROWNE & Co.,
9, Warwick Court, W.C., Agents for Applicant.
COMPLETE SPECIFICATION.
Improvements in Pullies.
I ALEXANDER GUILD of 17 Summerfield Terrace, Aberdeen Scotland,
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 improvements in pullies whereby they will be lighter
and stronger than heretofore.
According to this invention I make the pullies with tubular arms or spokes and
I also turn the rims of the pulley so as to form a flange in order to strengthen
such rim.
One way of carrying out this invention is to fix brackets round 'the rim of pulley
inside having screw holes in such brackets to receive the screwed ends of the
tubular spokes the other ends of said spokes are screwed into suitable screwed holes
in the boss of pulley.
I propose to have a right handed thread at one end of the spokes and a left
handed thread at the other end the female threads in the brackets and in the rim
and boss of pulley being cut so as to correspond with the threads on the spokes.
And in order that my said invention may be better understood, I will refer to
the drawings accompanying this Specification in which,
Fig. 1 shows side elevation of a pulley constructed according to this invention;
Fig. 2 a cross section of same,
Fig. 3 enlarged view of bracket to be rivetted or otherwise fixed to rim.
Similar letters denote the same parts in all the views.
a shews shaft on which pulley is mounted, b. boss to which the inner ends of the
tubular arms c are screwed, the brackets fixed to rim, into which the other ends
of the tubular arms c are screwed e flange round the rim f. lock-nut to keep the
arms c from slackening.

page_text: The threads on either end of each arm are right and left handed threads, and
the female threads in the boss and brackets are cut so as to correspond; so that
upon turning the tubular arms c round they screw into the boss b and brackets d
and may thus be thoroughly tightened up, thereby producing a very strong light
and rigid pulley.
The lock-nuts f. which have been previously screwed in the arms c are screwed
up in order to prevent the arms from slackening.
It is obvious that instead of forming the flange on the inside of the rim it may be
formed on the outside in order to strengthen the pulley.
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. In pullies the combination of the tubular threaded arms or spokes and
threaded holes in boss of pulley together with screwed brackets fixed to rim all
substantially as and for the purposes set forth.
2. In pullies the flange round rim substantially as set forth.
3. Pulleys constructed substantially as set forth.
Dain this 10th don
Novembar 1002
BROWNE & Co.,
9, Warwick Court, W.C., Agents for Applicant.