Improvements in Driving and Braking Mechanism for Velocipedes and other Vehicles and Machines.
Year: 1897

page_text: Date of Application, 7th Sept., 1897-Accepted, 18th Dec., 1897
Improvements in Driving and Braking Mechanism for Velocipedes
and other Vehicles and Machines.
We, WILHELM EDWARD NAGEBORN, Machinist, of 340 Grandy Avenue, in the
City of Detroit, State of Michigan, and FRED CONVERSE ANDREWS, Manufacturer,
of 45 Willis Avenue East, in the City of Detroit, State of Michigan, both in the
United States of America, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
The invention relates to a drive gear designed for bicycles or for other vehicles
or machines, in which a reciprocating motion is to be transferred into a rotary
motion.
The invention consists of a gear wheel having within its circumference
arranged in axial relation thereto, a segment or interrupted pinion adapted to
be connected with the gear wheel by a clutch and a rocking segment meshing
with the pinion.
The invention further consists in so constructing these parts that in addition
to propelling the device by a proper motion of the actuating device beyond the
normal movement, a brake may be applied thereto.
The invention further consists in the construction, arrangement and combina-
tion of the various parts, all as more fully hereinafter described.
In the drawings, Figure 1 is a central elevation of the invention showing in
full and dotted lines the different positions of the parts in operating the same.
Fig. 2 is a section on line xa on Fig. 1.
Fig. 3 is a side elevation of the rear part of the bicycle showing the inven-
tion applied thereto.
Fig. 4 is a perspective of part of the bicycle frame illustrating the applica-
tion of the device to a bicycle.
Fig. 5 is an elevation similar to Fig. 1 showing the parts in position for use
as a brake
Fig. 6 is a slightly modified form of crutch from that shown in the other
figures.
The improved gear device while particularly adapted for driving bicycles,
tricycles and similar vehicles is adapted also for other work, such as driving
blowers for forges and other light machinery and it is not desired that the inven-
tion shall be limited to its application to vehicles.
A is a gear wheel having a flange B on one side and forming what is herein-
after referred to, as a flanged wheel.

page_text: This wheel is journalled on a pin or stub shaft C which projects from the
frame or casing D, the wheel being preferably provided with a suitable hub C¹.
This hub has two functions, that of giving a suitable support for the wheel and
of forming a journal for a wheel or pinion E sleeved thereon. This wheel E
may be a gear pinion or it may be merely provided with a segment of a gear, as
shown at E and with this segment or pinion engages the teeth on a rocking
segment F which is secured to a stub shaft or pin G journaled in the casing.
This rocking segment is within the flange B of the gear wheel and by making
it thus as a segment the wheel E may be actuated at greater speed, that is, to
gear it up and still have all the parts or gears within the flange B of the driven
wheel.
The wheel E is connected to the gear wheel by any suitable clutch device which
shall connect the two in the forward movement of the wheel E and loosened
therefrom in the return movement.
The clutch which is shown and which is preferred is that illustrated in Fig. 1,
in which the wheel E is provided with a gear segment on one side and on the
other side is provided with a cam, incline or wedge face H, which bears against
a corresponding face on the clutch block I, which extends to the flange B of the
gear wheel, all so arranged that as the wheel E is turned in one direction, the
wedge H will force the block I against the flange and thus couple the two narts
together and in the reverse direction the cam H will move away from the block
and allow it to freely return, which return movement is aided by the arm or
stop J carried by the wheel E.
A slightly modified form of this clutch is shown in Fig. 6, the dog or block
being shown as a pivoted dog II, the pivotal point being eccentrically arranged
to effect the same result of clutching the wheel in one direction and releasing in
the opposite direction of the movement of the wheel E, a similar stop J being
provided to hold the dog or block in proper position for the re-engagement in
the reverse direction.
The pin G may be connected with any suitable source of power for rocking
the same, and the device is shown as applied to a bicycle. The pin is provided
in that case with the rock arm a and connected with the bell crank 6 on the pedal
shaft c, which has the arm d, there being two of these bell cranks and connec
tions, one on each side, for use alternately in the usual manner.
A suitable spring e is shown for returning the pedal to its upper position after
each actuation.
With the device thus far described it is evident that the depression of the pedal
will rock the segment F which in turn will rock the wheel E, turning the parts
from the position shown in full lines in Fig. 1 to the position
shown in dotted lines therein, and in this forward movement the
gear wheel A will be carried with the wheel E. The gear wheel A is shown
meshing with a pinion K on the shaft of the rear wheel, which thereby is driven
as the two pedals act successively upon the rear wheel a continuous progressive
motion is thereby imparted thereto.
At the limit of movement of the clutch block I is arranged a stop L upon the
opposite side from the stop J so that this block will be held from being acted on
by the cam or incline H if the wheel A is reversed as for instance in backing the
wheel.
Any other suitable means may be employed for rendering the clutch inopera-
tive during the reverse movement, but with this particular form of clutch the
stop is simple and effecive.
By having the rocking segment F located within the flange of the gear wheel A,
the wheel may be geared up materially by the reciprocating movement referred
to and get a much more compact device than would be the case if the gear wheel
were used of the same radius and which would necessarily be outside of the gear 5
wheel B.
It will be observed that with the construction shown in Fig. 1. the segment F

page_text: comes very close to the flange of the wheel A at the end of each movement there-
of, a normal movement of this segment, however, does not cause the segment to
strike the flange, but if the pedal is depressed beyond its normal movement the
segment F will be carried into contact with the flange and if held there will act
as a brake for the device.
To this end a shoe or bearing face 0 is provided on that part of the segment
which will contact the flange of the wheel A so as to make the brake most
effective. The gear wheels are shown enclosed in suitable casing P.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, we declare that what wo
claim is:
-
1 In a drive gear, the combination of a gear wheel of an actuating device
therefor comprising a concentrically arranged pinion or gear segment, a clutch
for coupling the pinion or segment with the drive wheel, and a rocking sector
within the circumference of the gear wheel, for rocking the pinion or segment.
2 In a drive gear, the combination of a flanged gear wheel of an actuating
device therefor comprising a concentrically arranged pinion or gear segment
within the flange, a clutch for coupling the flange on the wheel to the pinion,
and a rocking sector within the circumference of the gear wheel for rocking the
pinion or segment and actuating the clutch.
3 In a drive gear, the combination with the gear wheel to be driven, of an
actuating device therefor, comprising a combined pinion or gear segment and
clutch actuating device, concentrically arranged, and the clutch and actuating
devices for the pinion or segment.
4 In a drive gear, the combination with the flanged gear wheel to be driven,
a wheel or sleeve concentrically arranged within the flange, having a portion of
its circumference formed into a gear segment and another portion carrying a dog
actuated by the rotary motion thereof, and a rocking segment meshing with the
gear segment on the inner wheel.
5. The combination of a flanged gear wheel, having a hub projecting within
the flange, a toothed wheel journaled on the hub, a clutch acting to bind the inner
wheel to the gear wheel and a rocking segment with the flange meshing with the
teeth on the inner wheel.
6 The combination of a flanged gear wheel, having a hub projecting within
the flange, a wheel journaled on the hub having a gear segment thereon, a dog
acting to bind the gear between the flange and the hub, while rotating in one
direction, and to redease in the opposite direction, and a rocking segment
journaled beside the gear wheel, but within its flange, meshing with the teeth
on the inner wheel.
7 The combination with the flanged gear wheel, an inner wheel sleeved on
its hub within its flange, the dog actuated by the turning of the inner wheel
in one direction to bind against the flange, and to release in the opposite direction
and a stop or finger carried by the inner wheel to hold the dog in proper position
during its return movement.
8 The combination of the flanged gear wheel, the inner wheel journaled on the
hub of the gear wheel within the flange, the block or dog I adapted to be forced
against the flange by the turning in one direction of the inner wheel, and to be
released by the opposite movement, and a stop, such as L at the end of the return
movement, to hold the dog for the purpose described.
9 The combination with a gear wheel, a concentric inner wheel, having a
toothed portion, a clutch adapted to connect the two wheels, of a rocking seg-
ment for actuating the inner wheel, said seginent forming a brake when moved
beyond its normal travel.
10 In a drive gear, the combination with rocking or vibrating pedals, adapted
to intermittently actuate a gear wheel through a gear and clutch mechanism,
such as described, in the normal motion of the pedals, of means for releasing

page_text: the clutch mechanism, and applying a brake, by a movement of the pedals beyond
the normal.
Dated this 3d day of August 1897.
WILHELM EDWARD NAGEBORN,
FRED CONVERSE ANDREWS,
Haseltine Lake & Co.
45 Southampton Buildings, London, W.C. Agents for the Applicants.