Improvements in Gear Cases for Cycles and other Chain Driven Vehicles.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in Gear Cases for Cycles and other Chain Driven
Vehicles.
JAMES PARR, 61, Friar Lane, Leicester, Cycle Manufacturer, do hereby declare
the nature of this invention to be as follows;-
The general objection to gear cases now in use is the noise and obstruction caused
by the chain rubbing, catching, or banging against the sides, top, or bottom of
the gear case. This objection and defect I propose to overcome in the following
manner, that is to say use one or more bands, strips, semi circular, or V shaped,
or other shaped pads, composed of leather, hide, skin, fur, felt or cloth, plain,
fluted, cramped, corrugated, or of any suitable organic or inorganic substance,
manufactured into a smooth faced, pile faced or plush faced fabric, so constructed
and adjusted to the gear case, or its frame, as to steady and silence the chain when
in motion.
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COMPLETE SPECIFICATION.
Improvements in Gear Cases for Cycles and other Chain Driven
Vehicles.
JAMES PARR, 61, Friar Lane, Leicester, Cycle 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:-
My invention has for its object the prevention of noise and obstruction caused
by the chain rubbing, catching, or banging against the sides, top or bottom of the
gear-case. This very objectionable defect in chain-gear I effectually overcome by
means of one or more bands, strips, semicircular, V shaped, or other shaped pads
(excluding bristle-brushes,) composed of leather, hide, skin, fur, felt, elastic, cloth,
or any other suitable organic, or inorganic material made into a fluted, crimped,
corrugated, pile-faced, plush-faced, or smooth-faced fabric or substance, which when
adjusted to the gear-case, or its frame, steadies and silences the chain when in
motion.
The aforesaid pads which I will hereinafter designate by the more appropriate
name cushions, and whose action is distinctly dissimilar to that of a lining, are
attachable to the inner surface of the top, bottom, and sides of the gear-case, or its
frame, to which it is affixed by cement or other glutinous or adhesive substance,
or by lacing, rivetting, spring clutch, or key-pin action or by any other equivalent
means of retention.

page_text: Sometimes I use two cushions, one fixed to the upper inner surface of the gear-
case or its frame, the other fixed to the lower inner surface of the gear-case or its
frame.
In some cases I use the cushions connected, but placed at a proper distance apart
from each other, on a springy or non-elastic strip, whose two ends, after adjustment,
are joined together in the manner hereinafter described.
When I use a band for securing the cushions in position, the cushions are some-
times in the form of halves, each half being placed at a proper distance apart on
the band, so that when the band is placed around, that is to say, transversely
encircles the gear-case frame. The cushions which project like tabs from the inner
surface of the band are easily pressed or guided into position. When thus adjusted,
the band, passing over the upper and lower outer surfaces of the gear case frame-
necessarily spans on one side the space betwixt the upper and lower limbs of the
gear case frame, and is made continuous on the other side by joining the two ends
of the band together with hooks, studs, clasps, buckles, or by lacing and other
means.
Sometimes instead of using a band carrying cushion or cushions, I prefer to make
the band in sections. Each section then carries a cushion, or cushions, or the
cushion or cushions may be fixed on, made in or form a portion of the band or
bands. After adjustment the band or bands are made continuous by joining their
ends in the manner herein before described. This arrangement is very convenient
when gear cases, or gear case frames vary in size.
The device is illustrated in the accompanying drawings, wherein Fig. 1 is a
sectional side elevation of the gear case and frame, showing the cushion with
sufficient of the gear case and frame to properly illustrate the invention:-
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A is the cushion; B is the leather cover on outside of gear-case frame; C is the
gear-case frame; D is the chain; E is the band with cushions attached; I is the
lace joining the ends of bands and cushions.
Fig. 2 is a cross section on line 1, 1, on Fig. 1.
Fig. 3 shows the band and cushions with tab-liko projections marked A, A,
mounted on band E.
Fig. 4 shows the cushion A. fixed to the inner surface of the top of the gear-case
frame, forming a loop in the centre.
Fig. 4 also shows the cushion A attached to the inner surface of the bottom of
the gear-case frame, or gear-case.
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Fig. 5 is a cross section on line 1, 1, on Fig. 4.
Fig. 6 is a sectional side elevation of a gear-case, cushions, and chain, and show-
ing the cushions fixed to the inner surface of the top, bottom, and sides of the
gear-case. G is the gear-case; A, A, are the cushions; D is the chain.
Fig. 7 is a cross section on line 1, 1, on Fig. 6.
Fig. 8 shows the cushion A, formed to fit in gear case.
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:-
The application of one or more chain steadying-cushions to the gear-case frame,
or to the gear-case of a cycle or any other chain-driven vehicle as herein before
described.
Dated this 7th day of December 1808