Improvements in Connecting Parts of Cranks and Driving Wheels and like Mechanism.
Year: 1897

page_text: Date of Application, 25th Sept., 1897
Complete Specification Left, 24th June, 1898-Accepted; 13th Aug., 1898
PROVISIONAL SPECIFICATION.
Improvements in Connecting Parts of Cranks and Driving Wheels
and like Mechanism.
I, THOMAS HEWETT, of G, Jeffreys Square, St. Mary Axe, in the City of London,
Mechanical Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to the improved construction of the connecting parts of
cranks and driving wheels, and like mechanism, such as the parts of the driven
wheels of bicycles and other forms of velocipedes, or other chain gear driven
vehicles.
In carrying out my present invention I form the crank in one with, or secured
to, a plate or disc through which and the crank arm the spindle passes and is
keyed, or otherwise fastened to the said crank.
66
On the inside this plate is formed with projections, lugs or outstanding parts,
which may be produced by cutting or milling," out the substance of the plate
and these parts pass through correspondingly formed openings in the disc nor-
tion of the wheel and the wheel and said plate may be further secured by screws,
bulis or nuts, rivets, or by a screwed cap engaging a corresponding thread on
the locking parts, or lugs; or this may be effected by equivalent means of
security.
The plate may be so recessed on its inner face as to form a chamber adjacent to
the crank bracket for the insertion of a porous washer which may be of felt, or woven,
or natural material adapted to hold lubricant, or exclude dirt, or both.
The outstanding parts, or lugs may themselves be burred over, or rivetted into
the discs, or parts of the wheels and in the case of the driven wheel the base or
foundation of the projections, lugs or outstanding parts will be the screwed, or other
collar. This screwed, or other collar also serves as the means whereby to attach
the wheel to the driven axis. The outstanding parts or lugs where they protrude
may be spread or enlarged to lock them.
Dated the 25th Jas
L100
Improvements in Connecting Parts of Cranks and Driving Wheels
and like Mechanism.
I, THOMAS HEWETT, of 6, Jeffreys Square, St. Mary Axe, in the City of London,
Mechanical Engineer do hereby declare the nature of this invention and in what
[Price 8d.]

page_text: manner the same is to be performed, to be particularly described and ascertained
in and by the following statement:-
This invention relates to the improved construction of the connecting parts of
cranks and driving wheels, and like mechanism, such as "the parts of the driven
wheels of bicycles and other forms of velocipedes, or other chain gear driven
vehicles.
In carrying out my present invention I form the crank in one with, or secured
to, a plate or disc through which and the crank arm the spindle passes and is
keyed, or otherwise fastened to the said crank.
:
On the inside, this plate is formed with projections, lugs or outstanding parts,
which may be produced by cutting, or "milling," out the substance of the plate
and these parts pass through correspondingly formed openings in the disc por-
tion of the wheel and the wheel and said plate may be further secured by screws,
bolts and nuts, rivets, or by a screwed cap engaging a corresponding thread on
the locking parts, or lugs; or this may be effected by equivalent means of
security.
The plate may be so recessed on its inner face as to form a chamber adjacent to
the crank bracket for the insertion of a porous washer which may be of felt, or woven,
or natural material adapted to hold lubricant, or exclude dirt, or both.
The outstanding parts, or lugs may themselves be burred over or rivetted into
the discs, or parts of the wheels and in the case of the driven wheel the base or
foundation of the projections, lugs or outstanding parts will be the screwed or other
collar.
This screwed, or other collar also serves as the means whereby to attach
the wheel to the driven axis. The outstanding parts or lugs where they protrude
may be spread or enlarged to lock them.
DESCRIPTION OF THE DRAWINGS.
:
Figs. 1 and 2 show by side view and edge view respectively an improved crank
for attachment to the driving wheel.
Figs. 3 and 4 show by side view and part sectional plan view respectively the
crank and wheel connected together.
Fig. 5 shows an alternative method of connecting the crank k and driving' wheel
together by a sectional view.
Fig. by plan view and Fig. 7 by detail view.
Figs. 8, 9, 10 and 11 show respectively by a section, two opposite side views
and a detail view, a modification of the method of fastening two halves a a of a
wheel say a driven wheel-together by means of a screwed collar with lugs
or projections 3 and a³ indicates the screw thread internally of the collar 5 for
attaching the wheel to the axis. b are double shoulders formed on the plates à a
producing with the flanges c the trough d for the chain to lie' in. e show anti-
friction wheels to engage the links of the chain (not shown).
I form the crank k in one with, or secured to a plate or disc
through which
and the crank arm the spindle passes and is keyed, as at 2, or otherwise fastened
to the said crank.
On the inside this plate is formed with projections, lugs or outstanding
parts which may be produced by cutting, or milling," out the substance of
the plate, and these parts pass through correspondingly formed openings a in
the disc portions a, a of the wheel, and the wheel and said plate ¹ may be
further secured by screws, bolts, and nuts, rivets, or by a screwed cap engaging
a corresponding thread on the locking parts or lugs 3; or this may be effected by
equivalent means of security.
The plate may be so recessed on its inner face as to form a chamber k
adjacent to the crank bracket for the insertion of a porous washer which may be
of felt, or woven, or natural material adapted to hold lubricant, or exclude dirt
or both.

page_text: The outstanding parts or lugs may themselves be burred over, or rivetted
into the discs or parts of the wheels and in the case of the driven wheel, as shewn
in Figures 8-11 wherein the base or foundation of the projections, lugs, or
outstanding parts will be the screwed, or other collar which collar is shown
separately by Fig. 11. This screwed or other collar also serves as the means
whereby to attach the wheel to the driven axis. The outstanding parts or lugs ³
where they protrude may be spread or enlarged to lock them.
-
Or the crank may be connected to the wheel as shown in Fig. 5. As here shown
the outer periphery of the lugs is formed with a screw thread to receive a
Screw threaded clamping ring A ring
serves to support
screwed lugs so as to prevent their yielding inwardly.
the
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 improved construction or arrangement and use of connecting parts of
cranks and driving wheels and like mechanism such as the parts of the driven
wheels of bicycles and other forms of velocipedes or other chain gear driven
vehicles, substantially as set forth and shown by the drawings.
2. The construction and arrangement in combination of a crank in one with,
or secured to, a plate or disc, provided with projections, lugs or outstanding parts,
which said parts are passed through correspondingly formed openings in the disc
portion of the chain wheel and are burred or rivetted to said disc of the wheel or
are equivalently secured thereto, as set forth.
3. The construction and arrangement in combination of a crank in one with,
or secured to, a plate or disc provided with projections, lugs or outstanding parts,
which parts are passed through correspondingly formed openings in the disc por-
tion of the chain wheel and are secured thereto by means of a screwed cap, or a
screwed ring whose thread engages a similar thread formed on the projections
aforesaid either with or without the use of the reinforcing ring 7, all substantially
as and for the purpose set forth and shown by Figures 5, 6 and 7.
T1 11. 01 J
T
1000
WM. BROOKES & SON,
55 & 56, Chancery Lane, London, Agents for the Applicant.