Improvements in Pulleys, Toothed Wheels, and the like.
Year: 1897

page_text: Date of Application, 15th Mar., 1897
Complete Specification Left, 15th Dec., 1897-Accepted, 5th Feb., 1898
Improvements in Pulleys, Toothed Wheels, and the like.
I, FREDERICK RICHARD SIMMS, of Amberley House, 12, Norfolk Street, Strand,
in the County of London, Engineer, do hereby declare the nature of this invention
to be as follows:
-
This invention relates to improvements in the construction of pulleys, toothed
wheels, friction wheels and the like, used for transmitting power and for other
purposes and has for its object to so construct such wheels and pulleys that they
shall yield to shocks thereby avoiding the danger of fracture which frequently
occurs in wheels and pulleys as now generally constructed.
To this end I arrange one or more elastic or air cushions between the peripheral
portion of the said wheels or pulleys and the main portion of the same.
In carrying out my invention I advantageously form the air cushion of two
rings of suitable elastic material such as india rubber or leather moulded to a semi-
circular shape in cross section and having flanges. The two inner flanges are
secured to an inner casing or to inner casings rigidly fixed to the body of the
wheel or pulley, whilst the two outer flanges are secured to an outer casing or to
outer casings rigidly fixed to the peripheral portion of the wheel or pulley. The
space so formed between the two rings may be provided with an inner or air tube
if desired.
It will be obvious that the construction of my elastic or air cushions can be
modified and I wish it to be understood therefore, that I do not confine myself to
the above described construction.
Improvements in Pulleys, Toothed Wheels, and the like.
I, FREDERICK RICHARD SIMMS, of Amberley House, 12, Norfolk Street, Strand,
in the County of London, 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 the construction of pulleys, toothed
wheels, friction wheels and the like, used for transmitting power and for other
purposes and has for its object to so construct such wheels and pulleys that they
077

page_text: shall yield to shocks thereby avoiding the danger of fracture which frequently
occurs in wheels and pulleys as now generally constructed.
To this end I arrange one or more elastic or air cushions between the peripheral
portion of the said wheels or pulleys and the main portion of the same.
In carrying out my invention I advantageously form the air cushion of two
rings of suitable elastic material such as india-rubber or leather moulded to a semi-
circular shape in cross section and having flanges. The two inner flanges are
secured to an inner casing or to inner casings rigidly, fixed to the body of the
wheel or pulley, whilst the two outer flanges are secured to an outer casing or to
outer casings rigidly fixed to the peripheral portion of the wheel or pulley. The
space so formed between the two rings may be provided with an inner or air tube
if desired.
In the accompanying drawing,
Z170
Figure 1 is a section through a portion of a friction wheel having my improve-
ments applied 'thereto :
1.
Figure 2 is a similar view of a belt pulley:
Figure 3 is a side elevation of a portion of a spur wheel made according to my
invention; and,
-
Figure 4 is a section through the same.
:
a, a are the two rings of india-rubber, leather or the like which form the air
-cushion and are moulded to a semi-circular shape in cross section; and b, bare
-the inner flanges upon the inner periphery of the rings a, a, e, c being the flanges
upon the outer periphery thereof. d, d are inner casings preferably made of
sheet metal by means of which the said inner flanges b, bare fixed to the body A
of the wheel or pulley through the medium of bolts d', d', and e, e are outer
casings also preferably made of sheet metal and by means of which the outer
flanges c, c of the rings a, a are rigidly fixed to the peripheral portion B of the
wheel or pulley through the medium of bolts e¹, el. f (Figures 1 and 2) is an
air tube provided in the space formed between the two rings a, a, and g, g Figure 2
are rivets for securing the inner casings d, d to the rings a, a.
In Figures 3 and 4 the inner casing is shewn formed in one piece continuous
with the body of the wheel instead of by two sheet metal rings d, d as above
mentioned. In this case also the inner ends of the two moulded rings a, a are
joined together and the flanges b, bare placed laterally and arranged to enter
recesses, formed in the inner casing d.
It will be obvious that any of the above described constructions can be applied
to any form of pulley or wheel.
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. The combination with a friction wheel of an air cushion consisting of a pair
of moulded india-rubber or other rings having inner (or lateral) and outer flanges,
the inner (or lateral) flanges being connected to an inner casing or rim attached to
the body of the friction wheel and the outer flanges secured to an outer casing and
to the rim proper of the wheel, substantially as described.
2. The combination with a belt pulley of an air cushion consisting of a pair of
moulded india-rubber or other rings having inner (or lateral) and outer flanges,
the inner (or lateral) flanges being connected to an inner casing or rim attached
to the body of the pulley and the outer flanges secured to an outer casing and to
the rim proper of the pulley, substantially as described.
3. The combination with a spur wheel of an air cushion consisting of a moulded
rubber or other ring having lateral (or inner) flanges which enter lateral grooves.
or recesses in an inner rim on the wheel proper (or are connected to the said
rim) and outer peripheral flanges which are secured to an outer casing which grips
the peripheral toothed portion of the spur wheel, substantially as described.
4. The improved friction wheel, belt pulley and spur wheel: herein before

page_text: described and illustrated respectively in Figures 1, 2 and 3 and 4 of the accom-
panying drawing.
Dated the 15th day of December 1897.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.