Improvements in and relating to the Construction of Pulleys,
Year: 1899

page_text: Date of Application, 14th June, 1899-Accepted, 5th Aug.,
1899
COMPLETE SPECIFICATION.
Improvements in and relating to the Construction of Pulleys,
I, NICOLAUS BECKER, of 21, Eckenheimerlandstrasse, Frankfort on the Main,
in the Empire of Germany, Manufacturer, 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:-
:-
The present invention relates to a pulley constructed partly of wood and partly
of iron which combines the qualities of unalterable cylindrical form and firmness
with minimum weight and cheapness of production; combining, in fact, the
advantages of iron pulleys with those of wooden pulleys.
The invention is illustrated in the accompanying drawings, in which,
Figure 1 is a front elevation of a pulley constructed according to the invention.
Figure 2 is a sectional elevation corresponding to Figure 1.
Figure 3 is a detail elevation of the rim employed.
Figure 4 is a detail front sectional elevation showing the cross bars employed
bolted together.
Figure 5 is a front elevation of the bow spring frame employed according to
the invention.
Figure 6 is a detail elevation of the battens employed in substitution of spokes.
In carrying the invention into effect as illustrated in the accompanying draw-
ings each half of the pulley is constructed of two iron bow spring frames b
(Figure 5) and a peripheral rim c which is rivetted or otherwise secured to the
bow spring frames b, while a batten a is employed in each case in substitution
of spokes. Each of the battens a are preferably made of wood and are formed
to embrace the shaft f and are drawn together by means of bolts d, the bolts d
drawing together the cross bars e whose edges bear upon the cross or chord bars
of the bow springs frames b. The battens a are screwed or otherwise secured to
the bow spring frames 6 by means of screws g, the flanges being let into recesses
provided in the extremities of the battens for the purpose.
It will thus be understood that the rotary motion of the shaft is transferred
to the rim of the pulley without the employment of spokes and that the pulley
frame is firmly connected with the shaft and with the rim of the pulley.
In case of necessity more than two bow spring frames may be employed, more
especially in the case of large pulleys; while in the case of small pulleys the
chords of the bow spring frames may be omitted.
The rim c may be either provided of thin wood or from sheet iron, and in
the latter case a covering i of linoleum is preferably affixed thereupon. The
linoleum is either cemented, screwed, rivetted, or sewn upon the rim, but prefer-
ably a mechanical means of fastening is employed in addition to the use of
cement or glue. It will, of course, be understood that the purpose of the linoleum
is to permit of greater friction while not incurring any substantial expense.

page_text: Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:-
1. A pulley constructed of a bow spring frame and battens for the purpose and
substantially in the manner herein before described.
2. In a pulley such as herein before described the use of linoleum upon the rim
for the purpose and substantially as herein before described.
Dated this 14th day of June 1800
MARKS & CLERK,
18, Southampton Buildings, London, W.C.,
13, Temple Street, Birmingham, and
25, Cross Street, Manchester, Agents.
MARKS & CLERK,
18, Southampton Buildings, London, W.C.,
13, Temple Street, Birmingham, and
25, Cross Street, Manchester, Agents.