GB979316A - Improved variable mechanical advantage lever - Google Patents
Improved variable mechanical advantage leverInfo
- Publication number
- GB979316A GB979316A GB1045662A GB1045662A GB979316A GB 979316 A GB979316 A GB 979316A GB 1045662 A GB1045662 A GB 1045662A GB 1045662 A GB1045662 A GB 1045662A GB 979316 A GB979316 A GB 979316A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mechanical advantage
- lever
- arm
- pitman
- effort
- 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
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
- G05G7/00—Manually-actuated control mechanisms provided with one single controlling member co-operating with one single controlled member; Details thereof
- G05G7/02—Manually-actuated control mechanisms provided with one single controlling member co-operating with one single controlled member; Details thereof characterised by special provisions for conveying or converting motion, or for acting at a distance
- G05G7/04—Manually-actuated control mechanisms provided with one single controlling member co-operating with one single controlled member; Details thereof characterised by special provisions for conveying or converting motion, or for acting at a distance altering the ratio of motion or force between controlling member and controlled member as a function of the position of the controlling member
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Braking Elements And Transmission Devices (AREA)
Abstract
979,316. Linkwork; brake actuating mechanisms. N. C. POWRIE. Feb. 26, 1963 [March 19, 1962], No. 10456/62. Headings F2E and F2K. [Also in Division B7] In a variable mechanical advantage lever system for applying a thrust to a pitman 18, e.g. for operating the brakes of a motor vehicle, a lever 10 pivoted at 11 has an effort arm 13 and a shorter working arm 14 formed with cam forces 16, 17, 15 which are engaged by a roller follower 19 on the pit- man, so that when the effort arm is moved anti-clockwise against a bias spring 12 the cam rise 17 first causes the pitman to move with a low mechanical advantage to take up slack in the system, after which the slope of the face 15 provides a high mechanical advantage for the braking effort. Further movement of the lever reduces the mechanical advantage to allow a pumping action if fluid in an associated hydraulic system is low. Guide links 20 pivoted at 21 to the pitman constrain the latter to substantially linear movement. The lever arm 13 may carry a pendant pedal, or in another form (not shown) a pedal above the pivot 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1045662A GB979316A (en) | 1962-03-19 | 1962-03-19 | Improved variable mechanical advantage lever |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1045662A GB979316A (en) | 1962-03-19 | 1962-03-19 | Improved variable mechanical advantage lever |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB979316A true GB979316A (en) | 1965-01-01 |
Family
ID=9968205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1045662A Expired GB979316A (en) | 1962-03-19 | 1962-03-19 | Improved variable mechanical advantage lever |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB979316A (en) |
-
1962
- 1962-03-19 GB GB1045662A patent/GB979316A/en not_active Expired
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