Improved Driving Gear for Bioyoles, Tricycles, and other Light Machines.
Year: 1898

page_text: Improved Driving Gear for Bioyoles, Tricycles, and other Light
Machines.
GLORGE D ADAMSON, Minister of the Gospel and Doctor of Medicine, residing
at 2403, First Street, in the City of Louisville, County of Jefferson, State of
Kentucky, U.S. of America, do hereby declare the nature of this invention
to be as follows:-
-
An improvement of propulsion in bicycles, tricycles, and other light machines,
which are driven by foot-power; and the object of this invention is to lessen the
waste of energy by obviating the dead point, which is usually present in ciculai
movement, also by converting encular movement into linear so shorten the distance
covered for the work done, and also by a peculiar combination and application of
levels so increase the power applied as to give greater speed than is now attained.
These objects are attained by the mechanism illustrated in the accompanying
drawing, in which-
Fig. 1, is an elevation of the entire movement as it would appear if applied to a
bicycle.
Fig. 2, is a plan view in section, with cam wheel, g, omitted
Similar letters refer to similar parts throughout these views.
H, h, securely fastened together by pins o¹, o, form the axle upon and within
which the movement is carried, and it being clinched by jamb nuts, to frame f,
which is held in position thereon by studa m, thus becoming a fixed part of said
frame. A, a, are levers which are attached to B, b, immovably by fluted hole,
tongue k, screw 1, and nuts p B, b, are crank shafts within axle H, h, and com-
municating through it with A, a, into which they take as aforesaid. C, is a double
crank shaft moving fieely within axle II, h, on bearings d G, g, are cam or
eccentric wheels, having their bearings on o¹, and over which passes a chain or
steel cold, one end of which is made fast to double crank shaft C, and the other
to crank shafts, B, b, all respectively. On the encumference of cam-wheels, G, 9,
are keeper-teeth, n, which pass through chain or cord in order that said cams
may move with the chains, and having passed through the chains, and in order that
the chains may not ride, they are secured from returning by pins, as shown.
D, 1s a spur gear wheel keyed to double crank shaft, C, outside of axle, H, h.
E, is a spur gear wheel in mesh with spur gear wheel, D, and made fast to c,
which is flange of hub. F, 18 hub having one detachable flange, c, to which is
fixed spur gear wheel, E, as shown Hub, F, c, covers the entire movement and
uns loosely on ball bearings, e 2, 18 a milled nut screwed on to crank shaft, B,
diawing after it by the aid of tongue, k, the lever, A, which shps on grooves,

page_text: as shown; by this arrangement, adjustment of bearings of crank shaft, B, is
made, as well as the rigidity of the lever, A, secured, for when nut, 2, is in placo
with tongue, k, of levei, A, in groove on its periphery, as shown, and screw, 7, 19
sciewed home, then lever, A, becomes a lock for nut, p, and nut, p, becomes a
keeper for level, A are spokes of driving wheel.
It will now be seen that if power be applied to lever, A, fulcrumed on crank
shaft, B, to which it is fixed, B will move and the fulcrum of crank shaft, B,
being in the center of axle, H, h, it will impart movement to chain, which chain
will carry with it cam wheel, G, and transmit its movement to double crank
shaft, C, when double crank shaft, C, moves, apur gear wheel, D, being keyed
to it, moves also, and in moving, moves spur gear wheel, E, with which it is in
mesh, and as spur gear wheel, E, is made fast to flange, c, of hub, F, then hub, F,
moves with it Therefore movement of lever, A, or level, a, will produce movement
of hub, F, for they together form a pair of levers of similar movement It will
be seen in Fig. 1, that cam wheel, G, being not at the bottom of stroke, cam
wheel, g, has reached the top of stroke, to bring cam wheel, G, to finish of
stroke, lever, A, will go to X; in so doing, lever, a, will be brought on its stroke
to X, as shown. This will be repeated every half stroke, therefore this movement
has no dead point.
Dated this 27th day of May 1898
Improved Driving Gear for Bicycles, Tricycles, and other Light
Machines.
GEORGE D, ADAMSON, Minister of the Gospel and Doctor of Medicine, residing
at 2403, First Street, in the City of Louisville, County of Jefferson, State of
Kentucky, U.S 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
ascertained in and by the following statement.―
An improvement of propulsion in bicycles, tricycles, and other light machines,
which are driven by foot-power; and the object of this invention is to lessen the
waste of energy by obviating the dead point, which is usually present in circular
movement; also by converting circular movement into linear so shorten the distance
covered for the work done; and also by a peculiar combination and application of
levers so increase the power applied as to give greater speed than is now attained
These objects are attained by the mechanism illustrated in the drawings filed
with my Provisional Specification together with those herewith filed, in which,
Fig. 1, is an elevation of the entire movement as it would appeal if applied to a
bicycle.
Fig. 2, is a plan view in section, having one cam-wheel removed in order that
points of connection for chain passing over the cam-wheel may be seen
Fig 3, is a sectional view in elevation, as seen from the front
Similar letters refer to similar parts throughout these views
H, h, securely fastened together by pins o¹, o, form the axle upon and within
which the movement is carried, and it being clenched by Jamb nuts 2, to frame f
which is held in position thereon by studs m, thus becoming a fixed part of said
frame A, a, are levers which are attached to B, b, immovably by fluted hole,
tongue k, sciew 7, and nuts p. B, b, are crank shafts within axle H, h, and com-
municating through it with A, a, into which they take as aforesaid C 18 a double-
crank shaft moving freely within axle H, h, on bearings d. G, g, are cam or

page_text: eccentric wheels, having their bearings on o¹, and over which passes a chain or
steel cold one end of which is made fast to double-ciank shaft C and the other
to crank shafts, B, b, all respectively. On the circumference of cam-wheels, G,
are keeper-teeth n, which pass through chain or cord in order that said cams
may move with the chains, and having passed through the chains, and in order that
the chains may not ride, they are secured from returning by pins, as shown
D is a spur gear-wheel keyed to double-crank shaft Coutside of axle H, h.
E is a spur gear-wheel in mesh with spur gear-wheel D and made fast to c,
which is Hange of hub. F 18 hub having one detachable flange c, to which 19
fixed spur gear-wheel E, as shown. Hub F, c, covers the entire movement and
runs loosely on ball bearings e 18 a milled nut screwed on to crank-shaft B,
drawing after it by the aid of tongue k, the lever A, which slips on grooves,
as shown, by this arrangement, adjustment of bearings of crank-shaft, B, 19
made, as well as the rigidity of the lever, A, secured; for when nut p is in place
with tongue of lever A in groove on its periphery, as shown, and screw, 1, is
screwed home, then lever A becomes a lock foi nut, p, and nut p becomes a
keeper for lever A q are spokes of driving-wheel
It will now be seen that if power be applied to lever A, fulciumed on cianh-
shaft B, to which it is fixed, B will move, and the fulcium of ciank-shaft B
being in the center of axle H, h, it will impart movement to chain, which chain
will carry with it cam wheel G, and transmit its movement to double-ciank
shaft C, when double-crank shaft, C, moves, spur geat-wheel, D, being keyed
to it, moves also, and in moving moves spur gear-wheel, E, with which it is in
mesh and as spur gear-wheel Es made fast to flange c, of hub F, then hub F
moves with it. Therefore movement of lever A, or lever a, will produce movement
of hub F, for they together form a pair of levers of similar movement It will
be seen in Fig 1, that cam-wheel &, being not at the bottom of stroke, cam-
wheel has reached the top of stroke, to bring cam-wheel G to finish of
stroke, lever A will go to X; in so doing, lever a will be brought on its stroke
to X, as shown This will be repeated every half stroke, therefore this movement
has no dead point
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same 18 to be performed, I declare that what
I claim 18 -
1 A mechanical movement comprising two shafts, levers fulciumed on said
shafts, a double-crank shaft mounted in proximity to said first named shafts, a
spur gear-wheel on said double-crank shaft, cam-wheels mounted at a point above
Baid crank-shaft, chains connected to double-crank shaft and passing over the cam-
wheels and attached to the lovers, substantially as described.
2. The combination in a bicycle of shafts, levers fulcrumed on said shafts, a
double-crank shaft mounted in proximity to said first-named shafts, cam-wheels
mounted at a point above said crank-shaft, chains connected to the double-crank
shaft and passing over the cam-wheels and attached to the levers, and the hollow
axle having said first-named shafts mounted centrally, substantially as described.
3. The combination in a bicycle of shafts, levers fulcrumed on said shafts, a
double-crank shaft mounted in proximity to said first-named shafts, a spur gear-
wheel on said double-crank shaft, cam-wheels mounted at a point above said
crank-shaft, chains connected to the double-crank shaft and passing over the
cam-wheels and attached to the levers, the diving-hub and a gear wheel suitably
fastened to the inside of said driving-hub of bievele, substantially as descubed.
4. The combination of crank-shaft, cam-wheel provided with keeper-tooth
mounted in proximity to said crank-shaft, chain attached to said crank and pass-
ing over said cam-wheel engaging said keeper-tooth and oscillating lever to which
the end of said chain is attached, substantially as described.
5. The combination of nut p, having a groove in its periphery, with a lever
carrying a tongue k, and screw 1, engaging said groove and nut, respectively,

page_text: a shaft taking into said lever, the end of said shaft being threaded and longitu-
dinally grooved, and the aperture in the lever being provided with longitudinal
ibs corresponding to the grooves on the shaft, substantially as, and for the pur+
pose specified
6 A bicycle-hub comprising shell F, flange c, suitably attached to said shell, t
spur gear-wheel securely fastened to inside said flange, and bearings e, substan-
tially as described
TY L
1
G47
1
1000