GB645791A - A foot-controlled derailleur change speed gear for cycles - Google Patents

A foot-controlled derailleur change speed gear for cycles

Info

Publication number
GB645791A
GB645791A GB2697748A GB2697748A GB645791A GB 645791 A GB645791 A GB 645791A GB 2697748 A GB2697748 A GB 2697748A GB 2697748 A GB2697748 A GB 2697748A GB 645791 A GB645791 A GB 645791A
Authority
GB
United Kingdom
Prior art keywords
wheel
sprocket
spring
pedalling
chain
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
GB2697748A
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.)
FREDERICK JAMES WILLIAM MARKLE
Original Assignee
FREDERICK JAMES WILLIAM MARKLE
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 FREDERICK JAMES WILLIAM MARKLE filed Critical FREDERICK JAMES WILLIAM MARKLE
Priority to GB2697748A priority Critical patent/GB645791A/en
Publication of GB645791A publication Critical patent/GB645791A/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
    • B62M9/1244—Mechanisms for shifting laterally limiting or positioning the movement
    • B62M9/1246—Mechanisms for shifting laterally limiting or positioning the movement using cams or plates
    • 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
    • B62M2009/12413—Rear derailleur comprising telescoping mechanisms

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Transmissions By Endless Flexible Members (AREA)

Abstract

645,791. Variable-speed chain gearing. MARKLEW, F. J. W. Oct. 18, 1948, Nos. 26977/48 and 5808/49. [Class 80(ii)] In a derailleur type variable speed chain gearing for cycles an auxiliary free-wheel sprocket wheel 13 is axially slidable by back - pedalling to position the driving chain 14 to engage either of two rear wheel sprockets 1, 2 on resumption of forwardpedalling. The sprocket freewheel boss 21 is mounted on a transverse hollow shaft 12 the axial movement of which is controlled by a movable cylindrical cam 15 secured thereto by a bayonet connection 19, 20, a fixed cylindrical cam 6 secured by projections and notches 8, 9 to a barrel 5 mounted on a bracket 3 depending from the cycle rear axle, and a compression spring 28 acting between a barrel closing end cap 30 and a flange 29 of a rod 22 which by a thrust bearing 23 loads the cam surfaces into engagement. Back-pedalling causes the sprocket wheel 13 to rotate the shaft 12 which is thereupon moved axially by cam surfaces 10, 17 to align the sprocket wheel 13 with the opposite rear wheel sprocket. Further back-pedalling returns the members to their original positions. The spring 28 also has a torsional force to load a chain tensioning jockey wheel or pulley 26 supported in ball bearings 27 by a flexible arm 24 secured to the rod 22. Modifications to the cams provide for three speed ratios, processional or otherwise, and for four speed ratios. The two speed arrangement may operate in conjunction with three rear wheel sprockets by axially adjusting the barrel 5 in its holder 4 to cause selection of the middle and either of the two centre sprockets. The spring 28 may operate only as a compression spring and an external spring is used to load the jockey pulley. The arm 24 may be shaped to form a chain guard.
GB2697748A 1948-10-18 1948-10-18 A foot-controlled derailleur change speed gear for cycles Expired GB645791A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2697748A GB645791A (en) 1948-10-18 1948-10-18 A foot-controlled derailleur change speed gear for cycles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2697748A GB645791A (en) 1948-10-18 1948-10-18 A foot-controlled derailleur change speed gear for cycles

Publications (1)

Publication Number Publication Date
GB645791A true GB645791A (en) 1950-11-08

Family

ID=10252176

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2697748A Expired GB645791A (en) 1948-10-18 1948-10-18 A foot-controlled derailleur change speed gear for cycles

Country Status (1)

Country Link
GB (1) GB645791A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4637808A (en) * 1984-02-16 1987-01-20 Kawamura Cycle Co., Ltd. Bicycle rear derailleur
EP1445185A2 (en) † 1999-11-30 2004-08-11 Shimano Inc. Assisting apparatus for shifting a bicycle transmission
EP1300329B1 (en) * 2001-10-03 2008-07-23 Shimano Inc. Assisting apparatus for changing speeds in a bicycle transmission
EP1714864A3 (en) * 2005-04-20 2008-09-10 Shimano Inc. Chain tension applying device
CN111717327A (en) * 2019-03-18 2020-09-29 佶庆电机有限公司 Protection structure of electric chain shifter
CN112478041A (en) * 2019-09-11 2021-03-12 台湾微转股份有限公司 Bicycle chain puller
CN113173224A (en) * 2017-03-20 2021-07-27 Sram德国有限公司 Rear derailleur for coaxial mounting

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4637808A (en) * 1984-02-16 1987-01-20 Kawamura Cycle Co., Ltd. Bicycle rear derailleur
EP1445185A2 (en) † 1999-11-30 2004-08-11 Shimano Inc. Assisting apparatus for shifting a bicycle transmission
EP1445185B2 (en) † 1999-11-30 2010-07-21 Shimano Inc. Assisting apparatus for shifting a bicycle transmission
EP1300329B1 (en) * 2001-10-03 2008-07-23 Shimano Inc. Assisting apparatus for changing speeds in a bicycle transmission
EP1300329B2 (en) † 2001-10-03 2012-05-02 Shimano Inc. Assisting apparatus for changing speeds in a bicycle transmission
EP1714864A3 (en) * 2005-04-20 2008-09-10 Shimano Inc. Chain tension applying device
US7955205B2 (en) 2005-04-20 2011-06-07 Shimano Inc. Chain tension applying device
CN113173224A (en) * 2017-03-20 2021-07-27 Sram德国有限公司 Rear derailleur for coaxial mounting
CN111717327A (en) * 2019-03-18 2020-09-29 佶庆电机有限公司 Protection structure of electric chain shifter
CN112478041A (en) * 2019-09-11 2021-03-12 台湾微转股份有限公司 Bicycle chain puller

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