GB646609A - An improved chain tensioning attachment for derailleur gearing - Google Patents
An improved chain tensioning attachment for derailleur gearingInfo
- 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
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)
- 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.
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)
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 |
-
1948
- 1948-05-24 GB GB1394948A patent/GB646609A/en not_active Expired
Cited By (1)
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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