Improvements in Driving Wheels for Machinery.
Year: 1893

page_text: Date of Application, 4th July, 1893-Accepted, 5th Aug., 1893
COMPLETE SPECIFICATION.
Improvements in Driving Wheels for Machinery.
A communication from GEORGE DANIEL MUNSING, of 213, North Lyndale
Avenue, Minneapolis, Hennepin County, Minnesota, Manufacturer.
I, WILLIAM LLOYD WISE of No. 46 Lincoln's Inn Fields in the County of
London Consulting Engineer and Chartered Patent Agent 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 object of this invention is to provide a wheel for use in connection with all
sorts of machinery whereby a certain amount of power and no more may be
applied to the machine.
The invention consists generally in constructing a driving-wheel with a rim or
face that is secured to the body of the wheel by the friction between said rim and
adjustable bearings upon the body of the wheel.
My invention will be more readily understood by reference to the accompanying
drawings, forming a part of this Specification, and in which:
Fig. 1 is a side elevation of a pulley embodying my improvement.
Fig. 2 is a cross section through the arms of the pulley taken on the line y-y of
Fig. 1.
Fig. 3 is an enlarged section of a portion of the rim to more clearly show the
friction block.
In the drawings, 2 represents the body of the wheel or spider comprising the
hub and spokes surrounded by the felloe 4. 6 represents the rim or slipping tire
of the pulley, the outer surface of which receives the belt. The inner surface of
this rim is preferably provided with the annular and central rib 7 of substantially
the same width as the fixed rim 4. 8 are friction blocks preferably U-shaped and
extending over the fixed rim 4 and embracing rim 7 upon the rim 6. The bearing
faces upon these blocks may be enlarged by suitable flanges 10 as shown in Fig. 3
when larger frictional or wearing surface is required. Braces 12 preferably extend
from these flanges to the upper portion of the block. Lugs or projections 14 are
preferably placed upon the fixed rim at either side of the friction blocks to hold
said parts in place upon the fixed center while allowing them to slide radially and
take up the wear.
16 represents screw bolts the outer ends of which are preferably squared and
fitted into a recess at the ends of the friction blocks. The inner ends of the bolts
are guided and held in the hub as shown. Spiral springs 18 surround these bolts.
The inner ends of the said springs resting upon the hub of the pulley and the
other ends controlled by the nuts 20 upon the screw bolts. The friction between
the blocks 8 and the rim is regulated by a greater or less compression of the
springs 18 by means of the nut 20. By this action the friction blocks are forced
outward against the inner surface of the rim until the desired amount of friction is
obtained. The nuts 20 are then jammed or locked together and the pressure
maintained. The wheel will thus be adjusted to a constant friction giving a certain
amount of belt pull. Anything beyond this amount will cause the rim to revolve
upon the friction blocks.
Having now particularly described and ascertained the nature of my inven-
tion, and in what manner the same is to be performed, I declare that what
I claim is:
1. The combination with a driving-wheel provided with a fixed rim, of a supple-
mental rim arranged outside of said fixed rim and free to turn thereon, and a series

page_text: of adjustable spring-bearings upon said wheel engaging the inner surface of said
supplemental rim, substantially as and for the purpose set forth.
2. In a driving-wheel, the combination, with a fixed center, of a loose outer rim
arranged thereon, a series of friction blocks arranged upon said fixed center and
embracing the inner portion of said rim, and a series of adjustable springs actuating
said blocks, substantially as and for the purpose set forth.
3. In a driving pulley, the combination, with the fixed center having the narrow
rim 4, of the loose rim provided with the rib 7 of substantially the same width as
the fixed rim 4, the friction blocks embracing said felloe and the rib 7, and
adjustable springs actuating said blocks, substantially as described.
4. In a driving-wheel, the combination with a fixed center, of a loose outer rim
free to revolve thereon, a projecting rib on the interior of said rim, friction blocks
secured upon the fixed center and embracing said rib, and a series of adjustable
springs for actuating said blocks, substantially as and for the purpose set forth.
Dated this 4th day of July 1893.
W. LLOYD WISE,
Per F. J. Brougham,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.