GB646609A - An improved chain tensioning attachment for derailleur gearing - Google Patents

An improved chain tensioning attachment for derailleur gearing

Info

Publication number
GB646609A
GB646609A GB1394948A GB1394948A GB646609A GB 646609 A GB646609 A GB 646609A GB 1394948 A GB1394948 A GB 1394948A GB 1394948 A GB1394948 A GB 1394948A GB 646609 A GB646609 A GB 646609A
Authority
GB
United Kingdom
Prior art keywords
chain
pawls
spring
block
engagement
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
GB1394948A
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.)
UMBERTO GIANNELLI
Original Assignee
UMBERTO GIANNELLI
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 UMBERTO GIANNELLI filed Critical UMBERTO GIANNELLI
Priority to GB1394948A priority Critical patent/GB646609A/en
Publication of GB646609A publication Critical patent/GB646609A/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62MRIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M9/00Transmissions characterised by use of an endless chain, belt, or the like
    • B62M9/04Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio
    • B62M9/06Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like
    • B62M9/10Transmissions 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
    • B62M9/12Transmissions 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
    • B62M9/121Rear derailleurs
    • B62M9/124Mechanisms for shifting laterally
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62MRIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M9/00Transmissions characterised by use of an endless chain, belt, or the like
    • B62M9/04Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio
    • B62M9/06Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like
    • B62M9/10Transmissions 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
    • B62M9/12Transmissions 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
    • B62M9/121Rear derailleurs
    • B62M9/124Mechanisms for shifting laterally
    • B62M2009/12406Rear derailleur comprising a rigid pivoting arm

Landscapes

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

Abstract

646,609. Change-speed chain-gear. GIANNELLI, U. May 24, 1948, No. 13949. [Classes 80(i) and 80(ii)] A spring-loaded block C, carrying a chain - tensioning sprocket or pulley A in a multi-sprocket chain-shifting gear on a cycle, is positively locked in adjusted positions on a fixed square - s e c - tioned bar D on which it slides, by a pair of opposed pawls E, E, pivoted in the block and spring- loaded into engagement with ratchet-teeth on the bar. To effect a shift, the pawls E are first both lifted out of engagement by a control lever, the block then being under the influence only of its compression or tension loading-spring, not shown, which permits the chain to be shifted onto a selected hub-sprocket. by a striking fork, Fig. 3, not shown, controlled by a separate lever. The spring ensures the correct position of the tensioning-block C in the new speed, after engagement of which the pawls E are released to lock the block. The ends of the support-bar D are fixed to the lower end of the seat-tube or to the chain- and seat-stays of the cycle-frame, with the tension-pulley A above or below the centre line of the driving and driven sprockets. The loading-spring is capable of maintaining drive-tension on the chain with both pawls E disengaged. The pawls are offset so that only one engages at once. The device may be used with fixed or freewheel driven sprockets, in which former case it permits back-pedal braking.
GB1394948A 1948-05-24 1948-05-24 An improved chain tensioning attachment for derailleur gearing Expired GB646609A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1394948A GB646609A (en) 1948-05-24 1948-05-24 An improved chain tensioning attachment for derailleur gearing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1394948A GB646609A (en) 1948-05-24 1948-05-24 An improved chain tensioning attachment for derailleur gearing

Publications (1)

Publication Number Publication Date
GB646609A true GB646609A (en) 1950-11-22

Family

ID=10032280

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1394948A Expired GB646609A (en) 1948-05-24 1948-05-24 An improved chain tensioning attachment for derailleur gearing

Country Status (1)

Country Link
GB (1) GB646609A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021018317A1 (en) * 2019-07-31 2021-02-04 亿腾科技(无锡)有限公司 Novel drive structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021018317A1 (en) * 2019-07-31 2021-02-04 亿腾科技(无锡)有限公司 Novel drive structure

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