Improvements in Rims for Wheels.
Year: 1893

page_text: Date of Application, 10th June, 1893
Complete Specification Left, 27th Sept., 1893-Accepted, 28th Oct., 1893
PROVISIONAL SPECIFICATION.
Improvements in Rims for Wheels.
I, JAMES RICHARD TRIGWELL of 146 Brixton Hill, in the County of Surrey,
Cycle Manufacturer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to rims for wheels, especially cycle wheels, and has
reference to the arrangement of the metal in the rim, and the overlapping of the
edges. The rim is formed out of a flat strip of metal of the proper width, and is
generally of the usual crescent shape with hollow enlargements at each edge, the
strip being turned over at the inside of the crescent where the edges overlap to the
required extent, say a quarter or half an inch. By this means the body of
the crescent is double excepting at the centre where the strip overlaps, where it is
of treble thickness, the inner and outer faces of the crescent being rolled close
together and thus forming an exceedingly strong rim without the necessity for
brazing or other means of fastening except such as is afforded by the spokes.
Dated this 10th day of June 1893.
W. P. THOMPSON & BOULT,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Rims for Wheels.
I, JAMES RICHARD TRIGWELL of 146 Brixton Hill, in the County of Surrey,
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 :-
This invention relates to rims for wheels, especially cycle wheels, and has
reference to the arrangement of the metal in the rim, and the overlapping of the
edges. The rim as shown in the accompanying drawings, wherein I have repre-
sented sections of three different forms, is made out of a flat strip of metal of the
proper width, and is generally of the usual crescent shape as at A with a hollow
enlargement B at each edge, the strip being turned over at the inside of the
crescent where the edges overlap as at Ċ to the required extent, say a quarter or
half an inch. By this means the body of the crescent is double excepting at the
centre where the strip overlaps, where it is of treble thickness, the inner and outer
faces of the crescent being rolled close together and thus forming an exceedingly
strong rim without the necessity for brazing or other means of fastening except
such as is afforded by the spokes. If desired particularly for light racing rims I
may secure the three thicknesses together by rivets D, Figure 1, arranged at suit-
able intervals apart or by brazing or soldering but I find that the laps hold rigidly
together without special fastening of any kind, and when the spokes are in place
the wheel is so rigid that no other fastening is as a rule required. Hitherto so far
as I am aware, in what is generally known as a hollow rim, that is a rim having two
distinct thicknesses of metal instead of a single thickness, the two parts have been
some considerable distance,-say a quarter of an inch or more-apart, hence the
term "hollow" and the edges butting against each other and brazed or soldered
together; in the rims now described the three thicknesses all touch at the centre
at C and the two thicknesses at one side E while a small space F separates them at
the other side though even this small space can be closed up by a suitable formation
Price Adl

page_text: of the rolls. The edges B can be hollow as shown or of any desired shape
according to the construction or fastening of the tyre for which the rim is intended.
It will therefore be seen that I have produced a "hollow," or as I prefer to
designate it a "folded" rim without any longitudinal brazing.
The before described improvements may as indicated in the accompanying
drawings be applied to rims of various sections for accommodating any of the well
known forms of tyres..
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
:-
1. A "folded" wheel rim in which the adjacent edges overlap.
2. A folded wheel rim in which the adjacent edges are not brazed or soldered
together.
3. A folded wheel rim in which the whole or the greater part of the crescent
portion folds are in contact or approximately in contact.
4. A wheel rim constructed of sheet metal turned or folded over so as to form
at each edge a hollow enlargement and in the middle portion double and treble
thicknesses in contact or approximately in contact substantially as described and
illustrated in the accompanying drawings.
5. A wheel rim constructed substantially as described and illustrated in the
accompanying drawings.
6. The combination with a folded metal wheel rim having overlapping edges as
at C forming with the other superposed part of the rim three thicknesses of the
spokes passing through these three thicknesses to hold them together substantially
as described and illustrated in the accompanying drawings.
Dated the 19th day of September 1898.
J. R. TRIGWELL.
W. P. Thompson & Boult,
Agents for the Applicant.
J. R. TRIGWELL.
W. P. Thompson & Boult,
Agents for the Applicant.