GB520663A - Improvements in change speed gears for cycles, motor cycles and the like - Google Patents
Improvements in change speed gears for cycles, motor cycles and the likeInfo
- Publication number
- GB520663A GB520663A GB1447/39A GB144739A GB520663A GB 520663 A GB520663 A GB 520663A GB 1447/39 A GB1447/39 A GB 1447/39A GB 144739 A GB144739 A GB 144739A GB 520663 A GB520663 A GB 520663A
- Authority
- GB
- United Kingdom
- Prior art keywords
- carrier
- chain
- cycles
- lever
- movement
- 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
- B62M9/1242—Mechanisms for shifting laterally characterised by the linkage mechanisms
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Abstract
520,663. Change - speed chain - gearing. VAGNIEZ & MARMIN, A. Jan. 16, 1939, No. 1447. Convention date, Jan. 17, 1938. [Class 80 (ii)] [Also in Group XXXI] The invention relates to change-speed gearing, for cycles and motor-cycles, of the kind in which a chain 21 is shifted laterally on to different sized driven sprockets 33 by means of a shiftsprocket 20, mounted on a shiftable carrier 22 on which is pivoted a lever 34 carrying a tensionsprocket 35, a single spring 37 being provided for positively urging the carrier 22 in one direction, viz., towards the low-speed position against the pull of the Bowden control-cable 1, and also for urging the lever in the chain-tensioning direction. According to the invention the single spring 37 is connected between a fixed part 38 and the end 36 of the tensioning-lever 34, which end 36, during a shift, moves about the shift-sprocket carrier 22 in a direction which coincides with that of a component of movement which is imparted to the said carrier 22, whereby the spring length and hence the chaintension remain substantially constant in all operative positions. The carrier 22 is secured to a member 23 which constitutes one side of a deformable parallelogram, the opposite side 24 of which is adjustably fixed to the cycle-frame, and is connected to the movable side 23 by two pivoted sides 25. 26. Lateral movement of the shift- and tension - sprocket carrier 22, 23, to change speed, is produced. by deforming the parallelogram by swinging the pivoted sides 25, 26 under the control of the Bowden cable 1 acting against the spring 37. Such deformation results in the carrier 22, 23 having a longitudinal component of movement in addition to its transverse chain-shifting movement, and this longitudinal component compensates for the relative movement of the chain-tensioning lever 34 about the carrier 22, 23 as the chain engages a different driven sprocket 33, whereby the length of the spring 37 and hence the chaintension is kept substantially constant in all operative positions.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR520663X | 1938-01-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB520663A true GB520663A (en) | 1940-04-30 |
Family
ID=8916821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1447/39A Expired GB520663A (en) | 1938-01-17 | 1939-01-16 | Improvements in change speed gears for cycles, motor cycles and the like |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB520663A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108284914A (en) * | 2018-02-12 | 2018-07-17 | 珠海蓝图控制器科技有限公司 | Bicycle dials chain structure and bicycle |
-
1939
- 1939-01-16 GB GB1447/39A patent/GB520663A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108284914A (en) * | 2018-02-12 | 2018-07-17 | 珠海蓝图控制器科技有限公司 | Bicycle dials chain structure and bicycle |
| CN108284914B (en) * | 2018-02-12 | 2023-10-27 | 珠海蓝图运动科技股份有限公司 | Bicycle chain pulling structure and bicycle |
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