Improvements connected with Cycle Pedals and Cycle Cranks.
Year: 1891

page_text: Date of Application, 23rd Oct., 1891
Complete Specification Left, 25th July, 1892-Accepted 10th Sept., 1892
PROVISIONAL SPECIFICATION.
Improvements connected with Cycle Pedals and Cycle Cranks.
I, EDWARD GOODMAN SHEWARD, of 110 Cannon Street, City of London.
M.I.C.E., do hereby declare the nature of this invention to be as follows:-
This invention relates to certain improvements in cycle pedals and in cycle
cranks in order to increase speed, with less labour than at present, also to obtain
a firmer foot action on the pedals, with a longer thrust, the pedal proper being 80
arranged that it can recover itself to a given position after each thrust and so
relieve the foot during the lift motion.
The pedal proper occupies a position about axially with the axle although
the cranks are rotating while running down hill, the pedals then serving as foot
rests.
For the purpose of my invention, I make the corresponding ends of two crank
bars with checks or stops on one of their faces to limit the motion of one to the
other.
The crank bars are connected by a spring, so that they can be separated by foot
pressure and be returned to a normal position by the spring.
One crank bar is connected to the axle, and the other crank bar to its lower end
like an elongation thereof but as the axle rotates, the two bars come parallel
against a stop, the pedal of the second bar being about in line with the axle.
D
00
1001
H. GARDNER,
Patent Agent, 166, Fleet Street, London,
Agent for the said Edward Goodman Sheward.
COMPLETE SPECIFICATION.
Improvements connected with Cycle Pedals and Oycle Cranks.
I, EDWARD GOODMAN SHEWARD of 110 Cannon Street, City of London,
M.I.C.E. 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 certain improvements in cycle pedals and in cycle
cranks in order to increase speed with less labour than at present, also to obtain
a firmer foot action on the pedals, with a longer thrust, the pedal proper being so
arranged that it can recover itself to a given position after each thrust and relieve
the foot during the lift motion.
The pedal proper occupies a position about axially with the axle although
the cranks are rotating while running down hill, the pedals then serving as foot
rests.
The crank bars are connected by a spring, so that they can be separated by foot
pressure and be returned to a normal position by the spring. One crank bar is
connected to the axle, and the other crank bar to its lower end like an elongation
thereof but as the axle rotates, the pedal of the second bar can come about in line
with the axle.
The drawings annexed hereto represent my invention.
Figures 1 and 2 indicate two positions at which the spring can be placed, in one
case it is on the pedal crank lever, and in the other it is on crank lever proper.
Figure 3 shows my double crank levers in the position they occupy while the
machine is being propelled by an action on the pedal.

page_text: Figure 4 illustrates the double crank levers in a position they assume when the
rider's foot is off the pedal.
A is the crank lever proper as affixable to the axle B of the drive wheel, the
hub D. of which only is shown, E, E, being the spokes therefrom. F is a face
plate in piece with the connecting bolt G by which the two crank levers A, H,
are jointed and have free motion circularwise.
I is a headed pin secured to the face plate F for the loose attachment of a tumbler
plate J, said plate having a slot K for oscillatory motion on a stud L projecting
from the lever A, or H. The lower end of the plate J has a hook M, or it may
be an eye for one end of a helical spring N to engage, said spring N having its
opposite end connected to one of the crank levers A, or to a plate P, or the pedal
axle Q. R is the pedal.
The lever H is known as a "sling" and is employed with large diameter wheels
of machines on which the rider can sit low for propelling by a crank not fixed on
the wheels axle but for operating a crank therefrom.
The action is as follows; the rider when mounted exerts pressure on the pedal,
see Figure 4, and this by the forward thrust causes the lever H to move away
from the lever A and puts tension on the spring N by the cant given to the plate J,
until the two levers A, H, assume the position shown at Figure 3, the tension on
the spring N being gradually increased while this is being done, or until the pedal
lever is in position for effecting the propulsion of the machine, so that the pedal
moves over a different circle as indicated by the dotted lines a, a, to that of the
lever A which is represented by the dotted lines b, b.
When the pressure of the rider's foot is removed from the pedal, the spring N
causes the lever H to resume its normal position, as shown by Figure 4, the two
levers being then parallel and running round with the wheel like a single lever.
By the arrangement shown at Figure 5, I dispense with the plate J and stud,
and connect the spring N direct to the face plate F.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is
1. The improvements heretofore explained connected with cycle pedals cranks,
and consisting of plate F, pin I, plate J, stud L, and spring N all arranged and
acting in the manner and for the purposes described.
2. Providing an ordinary direct motion driving cycle with sling pedal cranks
joined to the ordinary cranks for the purposes set forth, with springs and their
accessories for enabling the sling cranks to assume a position adjoining the ordinary
cranks.
The 20th day of my o
H. GARDNER,
Patent Agent, 166, Fleet Street, London,
Agent for the said Edward Goodman Sheward.