GB709438A - Improvements in automatic lifting dogs - Google Patents
Improvements in automatic lifting dogsInfo
- Publication number
- GB709438A GB709438A GB1360951A GB1360951A GB709438A GB 709438 A GB709438 A GB 709438A GB 1360951 A GB1360951 A GB 1360951A GB 1360951 A GB1360951 A GB 1360951A GB 709438 A GB709438 A GB 709438A
- Authority
- GB
- United Kingdom
- Prior art keywords
- dog
- pin
- recess
- ratchet wheel
- engages
- 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
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
- B66C1/42—Gripping members engaging only the external or internal surfaces of the articles
- B66C1/422—Gripping members engaging only the external or internal surfaces of the articles actuated by lifting force
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Breakers (AREA)
Abstract
709,438. Lifting dogs with automatic control. BRITISH ELECTRICAL REPAIRS, Ltd. May 16, 1952 [June 8, 1951], No. 13609/51. Class 78 (4) Whether a pin g on an arm c of the lifting dog illustrated is trapped in a recess f in a locking bar a to prevent the dog closing after it has been opened is determined by the position of a ratchet wheel h turned about its pivot on the locking bar a each time the dog is raised. When the dog is open the pin g enters the end j of the recess f. When the dog is subsequently raised the pin engages one of four projections n on the ratchet wheel to turn it through 90 degrees. The ratchet wheel includes two surfaces k: if. when the dog is raised, the pin g engages one of these it is thrown out of the recess f as shown in Fig. 3. If, however, the pin g does not engage surface k it is allowed to enter the end m of the recess f to lock the dog in its open position as shown in Fig. 2. A spring biased pawl i engages the projections n to prevent reverse rotation of the ratchet wheel. Two such dogs may be carried by suitable lifting tackle and work in unison. Each arm b and c may comprise a pair of spaced parallel links riveted or otherwise secured together and between 'which the locking bar a and pin g are mounted.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1360951A GB709438A (en) | 1951-06-08 | 1951-06-08 | Improvements in automatic lifting dogs |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1360951A GB709438A (en) | 1951-06-08 | 1951-06-08 | Improvements in automatic lifting dogs |
Publications (1)
Publication Number | Publication Date |
---|---|
GB709438A true GB709438A (en) | 1954-05-26 |
Family
ID=10026146
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1360951A Expired GB709438A (en) | 1951-06-08 | 1951-06-08 | Improvements in automatic lifting dogs |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB709438A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2803489A (en) * | 1955-12-21 | 1957-08-20 | Albino S Zito | Load-lifting device of the self-gripping type |
DE1047722B (en) * | 1954-11-30 | 1958-12-24 | Skogsdon Ab | Lifting tongs |
FR2067898A5 (en) * | 1969-11-20 | 1971-08-20 | Poclain Sa |
-
1951
- 1951-06-08 GB GB1360951A patent/GB709438A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1047722B (en) * | 1954-11-30 | 1958-12-24 | Skogsdon Ab | Lifting tongs |
US2803489A (en) * | 1955-12-21 | 1957-08-20 | Albino S Zito | Load-lifting device of the self-gripping type |
FR2067898A5 (en) * | 1969-11-20 | 1971-08-20 | Poclain Sa |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB759211A (en) | Improvements in automatic door operating devices | |
GB709438A (en) | Improvements in automatic lifting dogs | |
GB1213689A (en) | Improvements in and relating to cage gate lock mechanisms | |
GB1467993A (en) | Fifth wheel couplings | |
GB739720A (en) | Improvements relating to lifting tongs and the like | |
GB629367A (en) | Improvements in or relating to gripping devices | |
GB1125873A (en) | Mortise type latch assembly | |
GB918429A (en) | Improvements in latches for sliding doors | |
GB907686A (en) | Improvements in or relating to crane or like load-carrying hooks | |
GB955824A (en) | Chain guiding and gripping devices | |
GB969444A (en) | Trailer coupling | |
US2415898A (en) | Attachment for tongs | |
GB468376A (en) | Improvements in locking devices for doors or gates | |
GB548916A (en) | Improvements in and relating to mechanism for releasably locking a pivoted member in one or more positions, particularly applicable to retractable undercarriages for aircraft | |
GB1007680A (en) | An improvement in or relating to locking devices for lifting tongs | |
GB613773A (en) | Improvements in mooring hooks | |
GB1035636A (en) | Door latching mechanism | |
GB843008A (en) | Improvements in automatic lifting tongs | |
GB847495A (en) | Improvements relating to grabs | |
GB618958A (en) | Improvements in or relating to fastenings for locks and latches and other purposes | |
GB1071759A (en) | Improvements in or relating to lifting clamps | |
US1572302A (en) | Manually-operated mechanism for operating and securing swinging doors | |
GB1205620A (en) | Improvements in central buffer couplings of railway vehicles | |
GB591379A (en) | Improvements in or relating to slip-hooks and like devices | |
GB571873A (en) | Improvements in locks |