An Improved Construction of Pullies and Wheels of Moderate Size.
Year: 1891

page_text: Date of Application, 30th Oct., 1891
Complete Specification Left, 23rd Nov, 1891-Accepted, 24th Dec., 1891
PROVISIONAL SPECIFICATION.
An Improved Construction of Pullies and Wheels of Moderate Size.
I, JOSEPH JOB MARTIN of Eatoncroft, Newmarket Road, Norwich in the
County of Norfolk, Gentleman, do hereby declare the nature of this invention
to be as follows:-
My invention relates to a cheap, simple and strong construction of pullies and
wheels of moderate size, which I effect in the following manner. I punch out and
stamp, by any suitable press, two discs of shect steel or other suitable metal,
stamping each dished with a hole in the centre, and with a rim which, for a pulley
or for a wheel with an elastic tyre is in section about one quarter of a circle. I
prefer also, for lightness, to punch out portions of the disc leaving the other
portions as spokes connecting the centre with the circumference. I put those two
discs together face to face, insert a shouldered tubular bush into their central holes,
and burr over the ends of this bush; I also secure the two halves together by
rivets through the spokes. The two quarter circle hollows in the rim form together
a semicircular groove suitable to receive a rope when a pulley is required, or to
receive a tyre of caoutchouc or other suitable material when a castor or running
wheel is required. The rim may however be made of other forms according to
the purpose for which the wheel is intended.
Dated this 30th day of October 1891.
ABEL & IMKAI,
Agents for the Applicant.
COMPLETE SPECIFICATION.
An Improved Construction of Pullies and Wheels of Moderate Size.
1, JOSEPH JOB MARTIN of Eatoncroft Newmarket Road, Norwich in the
County of Norfolk, Gentleman 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:-
My invention relates to a cheap simple and strong construction of pullies and
wheels of moderate size, which I effect in the following manner. I punch out and
stamp, by any suitable press, two discs of sheet steel or other suitable metal,
stamping each dished with a hole in the centre, and with a rim which, for a pulley
or for a wheel with an elastic tyre is in section about one quarter of a circle. I
prefer also, for lightness, to punch out portions of the disc leaving the other
portions as spokes connecting the centre with the circumference. I put those two
discs together face to face, insert a shouldered tubular bush into their central holes,
and burr over the ends of this bush; I also secure the two halves together by
rivets through the spokes. The two quarter circle hollows in the rim form together
a semicircular groove suitable to receive a rope when a pulley is required, or to
receive a tyre of caoutchouc or other suitable material when a castor or running
wheel is required. The rim may however be made of other forms according to the
purpose for which the wheel is intended.
Fig. 1 is a front view and Fig. 2 is a section of a pulley or wheel with grooved
rim according to my invention. It consists of the two discs A A of metal such as
steel punched out of sheet preferably with holes a through them for lightness.
They are also dished and stamped so as to present each half of the groove at the
rim where the discs are close together, and to be at the centre at some distance
apart admitting between them a boss B made with collars against which abut the
J

page_text: edges of the central holes of the discs. The two discs are held together by rivets R.
The parts of the metal forming the spokes between the holes a, may be corrugated
by the stamping so as to give them greater stiffness the ridges and furrows of the
corrugations extending almost radially from near the boss nearly to the rim as
indicated at C C.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I claim :-
A pulley or wheel consisting of two discs of sheet metal stamped to suitable
shape, rivetted together and provided with a tubular central boss, substantially as
described.
Dated this 23rd day of December 1891
ABEL & IMRAY,
Agents for the Applicant.