GB425613A - Improvements in velocipedes such as cycles - Google Patents

Improvements in velocipedes such as cycles

Info

Publication number
GB425613A
GB425613A GB2556233A GB2556233A GB425613A GB 425613 A GB425613 A GB 425613A GB 2556233 A GB2556233 A GB 2556233A GB 2556233 A GB2556233 A GB 2556233A GB 425613 A GB425613 A GB 425613A
Authority
GB
United Kingdom
Prior art keywords
fork
engaging
secured
notches
shoe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2556233A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BRUNO CARATTOLI
Original Assignee
BRUNO CARATTOLI
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BRUNO CARATTOLI filed Critical BRUNO CARATTOLI
Priority to GB2556233A priority Critical patent/GB425613A/en
Publication of GB425613A publication Critical patent/GB425613A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M9/00—Transmissions characterised by use of an endless chain, belt, or the like
    • B62M9/04—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio
    • B62M9/06—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like
    • B62M9/10—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like involving different-sized wheels, e.g. rear sprocket chain wheels selectively engaged by the chain, belt, or the like
    • B62M9/12—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like involving different-sized wheels, e.g. rear sprocket chain wheels selectively engaged by the chain, belt, or the like the chain, belt, or the like being laterally shiftable, e.g. using a rear derailleur
    • B62M9/121—Rear derailleurs
    • B62M9/124—Mechanisms for shifting laterally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M9/00—Transmissions characterised by use of an endless chain, belt, or the like
    • B62M9/04—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio
    • B62M9/06—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like
    • B62M9/10—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like involving different-sized wheels, e.g. rear sprocket chain wheels selectively engaged by the chain, belt, or the like
    • B62M9/12—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like involving different-sized wheels, e.g. rear sprocket chain wheels selectively engaged by the chain, belt, or the like the chain, belt, or the like being laterally shiftable, e.g. using a rear derailleur
    • B62M9/121—Rear derailleurs
    • B62M9/124—Mechanisms for shifting laterally
    • B62M2009/12406—Rear derailleur comprising a rigid pivoting arm

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)

Abstract

425,613. Change - speed gearing. CARATTOLI, B., Perugia, Italy. Sept. 15, 1933, No. 25562. [Class 80 (ii)] [See also Group XXXI] A change - speed gear for cycles comprises a fork member C, Fig. 1, pivoted at A adjacent the rear wheel hub and consisting of two arms rigidly connected together near the frame member F and having a head D for adjustable engagement with a rack or guide D1, D2, the said arms having slots for engaging the spindle E of the driving wheel whereby the tension of the chain may be varied by movement of said fork to permit transfer of the chain from one pinion of the driving wheel to another. When the fork is moved upwardly from the position shown in Fig. 1, the chain becomes slack and may be shifted on to another pinion by the hand or foot. Preferably however, this transfer is effected automatically by a cam member. In the case of three pinions X, Y, Z, Fig. 12, this member has equally spaced profiles 34, 35, 36, 37 and is mounted on a shaft 46, secured in an extension 38, Figs. 9, 10, of the fork, to rotate with a ratchet wheel 39. On upward movement of the fork, the ratchet wheel is rotated by a pawl 41, step-by-step rotation being ensured by a spring 40 engaging the faces of a rectangular neck 43 integral with the wheel. In a modification, Figs. 16 and 17, the cam member is rotated through a dog-clutch 56 by an arm 51 connected by a cable 49 to an operating button 48, step-by-step motion of the member being ensured by means of a spring- pressed plunger 59 engaging successive faces of its neck 58. In an arrangement, Fig. 4, the head of the fork comprises a cross bar 8 connecting pistons 7 in the arms C1, C2, of the fork, the said crossbar engaging in notches 10 in a rack D, secured to the frame F, wings 11, 12 on the bar preventing lateral play in the notches. In other arrangements, of particular use with the modification described with reference to Figs. 16 and 17, the crossbar is secured to a shoe slidable on a guide secured to the frame F, one or two pins on the shoe engaging in notches in the guide to lock the shoe in position.
GB2556233A 1933-09-15 1933-09-15 Improvements in velocipedes such as cycles Expired GB425613A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2556233A GB425613A (en) 1933-09-15 1933-09-15 Improvements in velocipedes such as cycles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2556233A GB425613A (en) 1933-09-15 1933-09-15 Improvements in velocipedes such as cycles

Publications (1)

Publication Number Publication Date
GB425613A true GB425613A (en) 1935-03-15

Family

ID=10229689

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2556233A Expired GB425613A (en) 1933-09-15 1933-09-15 Improvements in velocipedes such as cycles

Country Status (1)

Country Link
GB (1) GB425613A (en)

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