An Improved Construction of Pedals for Cycles.
Year: 1891

page_text: Date of Application, 29th July, 1891
Complete Specification Left, 25th Apr., 1892-Accepted, 28th May,
1892
PROVISIONAL SPECIFICATION.
An Improved Construction of Pedals for Cycles.
WILLIAM ANDREWS of 184 Trinity Road Aston juxta Birmingham
Staffordshire Machinist do hereby declare the nature of this invention to be as
follows:
:-
My invention relates to what are known in the trade as ball-pedals, and consists
in the first place of a novel arrangement of adjusting cones, and locking devices by
which a neat appearance is secured, and dust in a great measure is excluded from
the bearings. In the second place my invention provides a novel form of pedal
tread which said tread economizes material and reduces the weight of the pedal.
In carrying my invention into effect I take a pedal pin, and form at the inner
and outer end thereof a channel, groove, or abutment, adapted to serve as a race
for the steel balls, commonly used in the construction of ball bearings. The end
pieces or pedal plates are connected by the pedal treads, which said pedal treads
serve as distance pieces to keep the end pieces or pedal plates the required distance
apart. I prefer to insert a tube between these said end plates, the ends of which
fit in recesses formed in the said end plates; the object of this tube being to prevent
the entrance of dust and dirt to the bearings.
One of the aforesaid end plates is formed with a conical recess in the usual way,
but the other end plate has the space usually occupied by the conical cavity, entirely
bored out, and this bored cavity in the end plate is furnished with a screw thread
from end to end of the bore, the said end plate has a boss on one or both sides of
the bore so that the screwed cavity shall be of any desired length.
I now provide a cone with milled head and screw thread which will fit the afore
described cavity in the end plate. By screwing this cone in or out of the end
plate adjustment is made of both cones in their relation to the balls laying in the
grooves of the aforesaid pedal pin herein described. The said cone with milled
head enters into and occupies about half the entire screwed cavity in the end plate.
I now provide a screw plug which will fit into the other end of the screwed
cavity, I provide means for turning this plug by a spanner screw-driver or other
well known device. This said screwed plug when screwed into the cavity in the
end plate, advances until it meets and abuts against the cone which was inserted at
the other end, forming a lock, and maintaining the adjustment of the cone. This
said plug also completely closes the cavity and excludes dust.
The end plate with its cone and plug may be placed at the inner or outer end of
the pedal pin, the opposite end being slightly altered in form to suit the requirements
of the case.
In connecting or putting together; the pedal pin is inserted into the pedal, the
balls are placed in the grooves and adjustment made for working, by means of the
cone and locking plug as herein described.
I will now describe my novel construction of pedal tread. These treads are
commonly formed of a rod or
pin covered with india-rubber or other soft material.
According to this my invention I form the rod of metal by casting, forging, or
stamping. This rod is provided with cavities into which cavities I fit plugs of
india-rubber or other yielding material. This method of construction enables me
to form the ends of the rods with large bearing surfaces adapted to engage with
the pedal plates to which said plates they are connected by bolts, screws, or other
well known device.
Dated this 28th day of July 1801

page_text: .
COMPLETE SPECIFICATION.
An Improved Construction of Pedals for Cycles.
I, WILLIAM ANDREWS of 184 Trinity Road, Aston juxta Birmingham in the
County of Warwick Machinist 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 relates to what are known in the cycle trade as ball pedals,
and consist in the first place of a novel arrangement of adjusting cones, and locking
devices by which a neat appearance is secured and dust in a great measure is
excluded from the bearings. In the second place my invention provides a novel
form of pedal tread which said tread economizes material and reduces the weight of
the pedal.
In carrying my invention into effect I take a pedal pin and form at the inner and
outer end thereof a channel, groove or abutment, adapted to serve as a race for the
steel balls commonly used in the construction of ball bearings.
The end pieces or pedal plates are connected by the pedal treads which said pedal
treads serve as distance pieces to keep the end pieces or pedal plates the required
distance apart. I prefer to insert a tube between these said end plates, the ends of
which fit in recesses formed in the said end plates the object of this tube being to
prevent the entrance of dust and dirt to the bearings.
One of the aforesaid end plates is formed with a conical recess in the usual way,
but the other end plate has the space usually occupied by the conical cavity entirely
bored out, and this bored cavity in the end plate is furnished with a screw thread
from end to end of the bore. The said end plate has a boss on one or both sides of
the bore so that the screwed cavity shall be of any desired length. I now provide
a cone with milled head and screw thread which will fit the afore described cavity
in the end plate.
By screwing this cone in or out of the end plate adjustment is made of both cones
in their relation to the balls laying in the grooves of the aforesaid pedal pin herein
described. The said cone with milled head enters into and occupies about half the
entire screwed cavity in the end plate. I now provide a screw plug which will fit
into the other end of the screwed cavity.
I provide means for turning this plug by a spanner, screw-driver, or other well
known device. This said screwed plug when screwed into the cavity in the end
advances until it meets and abuts against the cone which was inserted at the other
end, forming a lock nut and maintaining the adjustment of the cone. This said
plug also completely closes the cavity and excludes dust. The end plate with its
cone and plug may be placed at the inner or outer end of the pedal pin, the opposite
end being slightly altered in form to suit the requirements of the case.
In con-
necting or putting together the pedal pin is inserted into the pedal the balls are
placed in the grooves and adjustment made for working by means of the cone and
locking plug as herein described.
I will now describe my construction of pedal tread. These treads are commonly
formed of a rod, or pin covered with india rubber or other soft material. According
to this my invention I form the rod of metal by casting, forging, or stamping.
This rod is provided with cavities into which cavities I fit plugs of india rubber
or other yielding material. This method of construction enables me to form the
ends of the rods with large bearing surfaces adapted to engage with the pedal
plates to which said plates they are connected by bolts, screws, or other well known
device.

page_text: the grooves; D D' are the pedal plates; E E, are the pedal treads; F is the dust
excluding tube fitting recesses in the pedal plates, D D. D' is the pedal plate
with usual conical recess, D in the end plate containing the adjusting cone g, g
Fig. 2 shows the same parts as Fig. 1 save that the adjusting cones g, g¹ are
placed at the crank end of the pedal pin A and the pedal plate H is formed with a
closed end and a conical cavity for the steel balls, as shown in the drawings.
The dust tube F and the pedal tread E are shewn in position as in Fig. 1.
j.j. Fig. 1 and Fig. 2 are the pedal rods furnished with cavities marked K suited
to receive the plugs of soft material as described-M-are the enlarged bearing
surfaces on the ends of the rods and N are the screws connecting the pedal
rods, J. J to the pedal plates D. D¹.
The pedal tread described herein and illustrated in the drawings was new to me
at the time of making my application for Letters Patent dated
Since that time I have found that such pedal tread is destitute of novelty and I
herewith disclaim it as forming a part of this my invention.
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 :-
1st. In a pedal for cycles the use of a pedal plate having a cavity entirely bored
out; which cavity is provided with locking cones substantially as illustrated in the
accompanying sheet of drawings Fig. 1 & Fig. 2.
2nd. In a pedal for cycles the use of a pedal plate having a cavity bored out and
furnished with locking cones, in combination with a pedal plate having a closed end
and furnished with a conical cavity, substantially as illustrated in Fig. 2 of the
accompanying sheet of drawings.
3rd. In a pedal for cycles the use of a dust tube to slide free at one or both
ends, in combination with the peculiar construction of pedal, as illustrated in Fig. 1
and Fig. 2 of the accompanying sheet of drawings.
Dated the 24th April 1892.
WILLIAM ANDREWS.