GB573254A - Improvements in or relating to pawl-and-ratchet wheel mechanism - Google Patents
Improvements in or relating to pawl-and-ratchet wheel mechanismInfo
- Publication number
- GB573254A GB573254A GB2000443A GB2000443A GB573254A GB 573254 A GB573254 A GB 573254A GB 2000443 A GB2000443 A GB 2000443A GB 2000443 A GB2000443 A GB 2000443A GB 573254 A GB573254 A GB 573254A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pawl
- lug
- ratchet wheel
- slipper plate
- shoulder
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H29/00—Gearings for conveying rotary motion with intermittently-driving members, e.g. with freewheel action
- F16H29/02—Gearings for conveying rotary motion with intermittently-driving members, e.g. with freewheel action between one of the shafts and an oscillating or reciprocating intermediate member, not rotating with either of the shafts
- F16H29/10—Gearings for conveying rotary motion with intermittently-driving members, e.g. with freewheel action between one of the shafts and an oscillating or reciprocating intermediate member, not rotating with either of the shafts in which the transmission ratio is changed by directly acting on the intermittently driving members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D41/00—Freewheels or freewheel clutches
- F16D41/12—Freewheels or freewheel clutches with hinged pawl co-operating with teeth, cogs, or the like
- F16D41/14—Freewheels or freewheel clutches with hinged pawl co-operating with teeth, cogs, or the like the effective stroke of the pawl being adjustable
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
Abstract
573,254. Variable-speed ratchet gearing. C.-W. ENGINEERING CO., Ltd., and SANDERS, J. H. Nov. 30, 1943, No. 20004. [Class 80 (ii)] Relates to ratchet gearing in which a feeding pawl 22 on an oscillatable lever 14 engages a ratchet wheel 12, the number of teeth of which that can be engaged by the pawl 22 being controlled by a cam 44 on a slipper plate 42. The latter can be adjusted by a knob 52 connected to a worm 48 engaging teeth 46 on the slipper plate 42. A check pawl 28 pivoted on a fixed pivot 30 prevents return movement of the ratchet wheel 12, According to the invention, holding means associated with the check pawl is arranged to engage the slipper plate and hold the latter against the reaction of the feed pawl when the feed pawl is moving backwards for disengagement from the ratchet wheel and the check pawl is manually disengaged from the ratchet wheel. As shown, the slipper plate 42 has a notch 78 providing a shoulder 80. A pivoted lever 74 has a lug 84 adjacent the stem 40 of the pawl 28 and a lug 82 adjacent the perimeter of the slipper plate 42. A handle 66 is connected to the stem 40 by links 58, 60. In operation, when it is desired to release the load, the knob 52 is operated until the pawl 22 can engage only a single tooth. This brings the shoulder 80 in line with the lug 82. During the feeding stroke, the handle 66 is pulled to release the check pawl 28 and cause the stem 40 to engage the lug 84 and move the lug 82 into the notch 78. On the return movement of the lever 14, the pawl 22 is forcedly removed from the ratchet wheel 12 which spins backwardly to relieve the load. The engagement of the lug 82 with the shoulder 80 prevents the blow reacting on the slipper plate adjusting gear 46, 48, 52.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2000443A GB573254A (en) | 1943-11-30 | 1943-11-30 | Improvements in or relating to pawl-and-ratchet wheel mechanism |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2000443A GB573254A (en) | 1943-11-30 | 1943-11-30 | Improvements in or relating to pawl-and-ratchet wheel mechanism |
Publications (1)
Publication Number | Publication Date |
---|---|
GB573254A true GB573254A (en) | 1945-11-13 |
Family
ID=10138745
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2000443A Expired GB573254A (en) | 1943-11-30 | 1943-11-30 | Improvements in or relating to pawl-and-ratchet wheel mechanism |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB573254A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3234804A (en) * | 1963-06-24 | 1966-02-15 | Ite Circuit Breaker Ltd | Spring operator motor charging means |
-
1943
- 1943-11-30 GB GB2000443A patent/GB573254A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3234804A (en) * | 1963-06-24 | 1966-02-15 | Ite Circuit Breaker Ltd | Spring operator motor charging means |
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