Improvements in the Construction of Pedals and Pedal Supporting- shafts for Bicycles or Velocipedes.
Year: 1896

page_text: Date of Application, 14th July, 1896-Accepted, 15th Aug., 1896
COMPLETE SPECIFICATION.
Improvements in the Construction of Pedals and Pedal Supporting-
shafts for Bicycles or Velocipedes.
I, HERBERT JOHN HADDAN, of the Firm of Herbert Haddan & Co., Patent
Agents, of 18 Buckingham Street, Strand, London, W.C., Civil Engineer, do
hereby declare the nature of this invention a communication to me from abroad
by William Grothe, and Thomas Howard White, of Cleveland, County of
Cuyahoga, and State of Ohio, United States of America, Manufacturers, 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 pedals and pedal
supporting-shafts for bicycles or velocipedes and it consists in certain features of
construction and combinations of parts, hereinafter described and pointed out in the
claims.
In the accompanying drawings,
Fig. 1 is a plan of the improved pedal mounted upon the pin of the crank of the
pedal shaft.
Fig. 2 is a central longitudinal section on line 2-2 Fig. 1.
Fig. 3 is a transverse section on line 3-3 Fig. 1.
Fig. 4 is an end elevation of a split spring collar preferably employed.
Fig. 5 is a section on line 5-5 Fig. 1.
Referring to the drawings, A designates a crank of the pedal shaft, and a the
crank pin upon which the pedal is mounted. The hub of the pedal is composed' of
two sections B B corresponding in size and shape. Each of said hub sections is
stamped from a sheet metal blank into the shape required to form one half of the
hub, and said hub sections, at their meeting ends and at opposite sides, are provided
with laterally and outwardly projecting flanges B'. The half-sections of the hub
are, preferably, so shaped that the hub formed by said sections shall taper toward
its outer end to conform to the taper of the crank pin, as shown in Figs. 1 and 2.
Having assembled the half-sections and rivetted or otherwise secured their
flanges B¹ together, as at B32, each end of the hub is externally screw threaded; as
at b. The employment of the method of hub construction herein before described,
results in the production of a hub that is light, strong, and durable, and that' is
comparatively inexpensive.
The outer end of the hub of the pedal (see Figs. 1 and 2) is embraced by a
cap C that is screw threaded internally and engages the corresponding threads
formed upon said end of the hub. Cap C is instrumental in holding the hub
sections together, precludes the ingress of dust-and grit at the outer end of the
pedal hub, and retains in place antifriction balls D that, in the application of the
pedal, are confined between the outer end of the crank pin and the aforesaid cap
and afford bearing for the outer end of the pedal.
..
The inner and larger end of the pedal hub is embraced by an internally screw
threaded cap E whose threaded portion engages the corresponding threads formed
upon said end of the pedal hub. Cap E is of course perforated centrally, as at e
(see Fig. 2) to accommodate the location of the crank pin in the application of said
cap, and said cap is not only instrumental in holding the hub sections together, and
in excluding dust. and grit from the engaging end of the hub, but also serves to
retain in place antifriction balls F confined between said cap and an annular
shoulder a formed externally upon the crank pin, which antifriction balls afford

page_text: bearing for the inner end of the pedal. To more effectually exclude the ingress of
dust and grit from the inner or larger end of the hub a washer G is mounted upon
the crank pin at the end of cap E.
By the construction herein before described it will be observed that caps C and E
perform three functions, viz. firstly, they are instrumental in holding, or affording
bearing for, the anti-friction balls; secondly, they exclude dust from the bearings,
and thirdly, they are also instrumental in holding or securing together the hub
sections, and consequently the side members of the pedal frame and in fact said
caps or collars would be sufficient in securing together the hub sections, and
consequently the side members without necessitating the employment of rivets B.
Washer G is composed preferably of felt or other elastic material. Washer G is
adapted to frictionally engage cap E, and the friction had between said washer and
the cap is controlled by a metallic split spring collar H mounted upon the crank
pin between washer G and the crank. Said collar upon the washer engaging end,
is preferably provided with an annular flange that embraces the washer and
presses the latter somewhat against the crank pin. By the construction just
described, it will be observed that the friction had between washer G and cap E
is increased or diminished according as the washer, by means of the spring collar,
is crowded against or loosened relative to the cap..
Means for locking cap E in the desired adjustment is provided and consists
preferably of a latch I that is pivoted at or near one end as at I, to a flange B' of
the hub of the pedal, and at its opposite end is adapted to engage corrugations e
formed in and arranged transversely of the peripheral surface of cap E.
Latch is operatively connected with a screw K that has a bevelled undercut
head K', whose bevelled annular side engages an incline 6' formed upon the
aforesaid flange of the hub, the trend of which incline is in the direction of the
outer end of said flauge and toward the inner end of the pedal, (see Figs. 1 and 5),
by which construction, it will be observed that latch I is rendered operative and
locks cap E, or is rendered inoperative according as the screw is turned the distance
required in the one direction or the other. The means shown for locking cap E
in the desired adjustment is, it will be observed, exceedingly simple in construction
and consequently inexpensive, and latch I is preferably pivoted to the respective
flange B' of the hub by (see Fig. 3) one of the rivets employed in securing together
the two sections of the hub.
The frame of the pedal is constructed preferably as follows: The side members
of said frame are preferably made integral with the hub, and to this end the
blank that is used to form one half, of the hub is made large enough and stamped
into, the shape required to form one half of both side members of the pedal frame
as shown in Fig. 3.
C designates the end members of the pedal frame. Each of said end members is
composed preferably of a single piece that, at opposite ends, is rivetted to the
different side members, respectively of the pedal frame. Members C are of course
perforated centrally as at C1, to accommodate the removal or assemblage of. parts
of-the-pedal. Each member O in the case illustrated is shown. bent laterally and
inwardly at each end as at O2, with portions Oriveted at O to the respective
side, member of the pedal frame.
1
Having now particularly described and ascertained the nature of this said inven-
tion and in what manner the same is to be performed we declare that what we
claim is:
1
1. The combination with the pin of the crank of the pedal shaft of the pedal
having its hub embracing said pin said liub being made in halves longitudinally
and screw threaded externally at each end, and correspondingly internally threaded
caps engaging the ends of the hub and securing the hub sections together,
antifriction balls interposed between the: crank pin and internal surfaces of the
caps, said caps being suitably shaped to afford bearing for the balls, and to exclude
dust and dirt from the ball bearings substantially as set forth

page_text: 2. The combination of the pin of the crank of the pedal shaft of the pedal
having its hub embracing said pin said hub being screw threaded at each end,
correspondingly threaded caps engaging the ends of the hub, and antifriction balls
interposed between the internal surface of said caps and the crank pin, a latch for
engaging and locking the cap at the inner end of the hub in the desired adjustment,
a screw operatively connected with said latch said screw having an undercut
bevelled head and an edge of the pedal frame engaging the bevelled annular
surface of said bead and having such trend that the latch shall be actuated toward
or from the adjacent cap according as the screw is turned in the one direction or
the other substantially as set forth.
3. The combination with the pin of the crank of the pedal shaft of the pedal
having its hub embracing said pin, said hub being screw threaded at each end,
correspondingly threaded caps engaging the threaded ends of the hub, and anti-
friction balls interposed between the internal surface of said caps and the crank
pin, a washer mounted upon the crank pin at the outer surface of the cap that
engages the inner end of the hub, and a split spring collar mounted upon the crank
pin and arranged to render it capable of controlling the friction had between the
aforesaid washer and cap, substantially as set forth.
Dated this 14th day of July 1896.
HERBERT J. HADDAN.