Improvements in Velocipedes.
Year: 1891

page_text: COMPLETE SPECIFICATION.
Improvements in Velocipedes.
I, HERBERT JOHN HADDAN, of the firm of Herbert & 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 Charles
Albert Dies and John Hart, both of Chicago, State of Illinois, United States of
America, 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 that type of bicycles or tricycles in which motion is
communicated from the pedal or treadle shaft to that of the rear driving wheels by
suitable connections between the two shafts.
And the present improvement has for its object to provide an improved con-
nection between the pedal shaft and that of the drawing wheel or wheels, embodying
the features of great durability and strength of parts increased speed, combined
with a minimum friction in the movement of the parts.
I attain such object by the construction and arrangement of parts illustrated in
the accompanying drawing, in which:
Figure 1, is a side elevation of a safety bicycle, embodying the present
invention.
Figure 2, a detail side elevation of the opposite side of the treadle or pedal
mechanism.
Figure 3, an enlarged detail side elevation of the motion transmitting mechanism
between the pedal or treadle mechanism and the shaft of the drawing wheels.
Figure 4, a transverse section at line
Figure 5, a similar view at line ¹¹.
and
Similar letters of reference indicate like parts in the several views.
Referring to the drawings, 1 represents the front or guide wheel, 2, the rear or
drawing wheel, and 3, the connecting frame, in which the wheels 1 and 2, are
journalled in the usual manner.
In the present invention the rear or driving wheel 2, is provided with a bevel
gear 4, that meshes with and is driven by a bevel wheel 5, at the rear end of a
forwardly extending shaft 6, that is supported in suitable bearings on the main
frame 3, as shown. The shaft 6, is formed with a quick pitch screw thread or
threads upon which the correspondingly screw threaded nut 7 travels and in its
rectilinear reciprocating movement imparts a rotary reciprocating motion to the
shaft 6, which in turn imparts a continuous rotary motion to the bevel wheels 4
and 5 through the following mechanism:
The bevel wheel 5, is loose on the shaft 6, and is locked thereto in one direction
by the spring dogs 8, in a hub fixed on said shaft, engaging in the internal
ratchet 9, formed in the hollow hub of said bevel gear 5, as illustrated in Figure 4,
the reverse movement of the shaft 6, is converted into a continuous rotary move-
ment of the bevel wheels in the one direction through the instrumentality of a
ratchet hub 10, on said shaft, carrying spring dogs 11 that engage the internal
ratchet formed in the sleeve 12, which sleeve is geared to the bevel wheel 5, by a
bevel pinion 13, meshing with the bevel teeth formations 14 and 15 on the bevel
wheel 5, and the sleeve 12, respectively. With this improved construction of parts
the rotary reciprocating movement of the screw shaft 6, will be converted into a
continuous rotary movement of the bevel gears 5 and 4.
Motion is communicated to the reciprocating nut 7, by a forked link 16, that
extends forward to an arm 17, on the shaft of the foot levers, so as to vibrate or
rock with the same, the said levers are of the treadle or rocking type, the right
hand lever 18 and arm 17 being preferably formed in one piece, as shown in

page_text: Figure 1, while the left hand lever 19, is pivoted a short distance away from the
shaft of the right hand lever, and is geared thereto by the sectors 20 and 21, the
purpose being to admit of one foot lever rising while the other is descending
and vice versa.
In use the ratchet mechanism may be modified and arranged in different
relations, as will readily suggest themselves to those skilled in the art, and likewise
the arrangement and location of the motion producing screw shaft may be
modified, to suit tricycle and like uses, without departing from the spirit of the
invention.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what L
claim is :-
:
1. The combination with the operating treadle or lever, and driving wheel of a
bicycle, etc. of the quick pitch screw shaft 6, reciprocating nut 7, for the same
having operative connection to the foot lever, and duplicate ratchet mechanism, 1
substantially as herein set forth, for imparting a continuous rotary motion to the
bevel wheel 5, essentially as set forth.
I
2. The combination with the operating treadle or lever, and driving wheel of.
a bicycle, etc., of the quick pitch screw shaft 6, reciprocating nut 7, for the same,
having a link connection 16, to the arm 17, of the foot lever, reversed ratchet 2
mechanism 8, 9 and 10, 11, 12, bevel pinion 13, bevel formations 14 and 15, and♪
bevel gears 4 and 5, essentially as set forth.
1
3. The combination with the operating treadle or lever, and driving wheel of a
bicycle, etc., of the quick pitch screw shaft 6, reciprocating nut 7, for the same,
having operative connection to the foot lever duplicate ratchet mechanism, sub-z
stantially as herein set forth for imparting a continuous rotary motion to the bevel
wheel 5, and the foot levers 18 and 19, the bevel 19 being geared to the shaft of
the lever 18 by gears 20 and 21, essentially as set forth.
Dated this 21st day or April 1891.
HERBERT & Co.,
18, Buckingham Street, Strand, London, W.C., Agents for the Applicant.