GB386655A - Improvements in jib cranes, derricks, sheer legs, overhead travelling cranes, telphers, crabs and like lifting devices - Google Patents
Improvements in jib cranes, derricks, sheer legs, overhead travelling cranes, telphers, crabs and like lifting devicesInfo
- Publication number
- GB386655A GB386655A GB2016731A GB2016731A GB386655A GB 386655 A GB386655 A GB 386655A GB 2016731 A GB2016731 A GB 2016731A GB 2016731 A GB2016731 A GB 2016731A GB 386655 A GB386655 A GB 386655A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cranes
- abutment
- load
- jib
- switch
- 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
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/88—Safety gear
- B66C23/90—Devices for indicating or limiting lifting moment
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
Abstract
386,655. Safety-devices for cranes. BABCOCK & WILCOX, Ltd. and FOX, R. S., Babcock House, Farringdon Street, London. July 14, 1931, Nos. 20167/31 and 10723/32. [Classes 78 (iv) and 78 (v).] A safe-load indicator or automatic stop device for cranes and like lifting devices comprises a member 1 attached to the luffing or hoisting rope, or to the tie rods of a jib crane, so as to move in accordance with the load, or the radius and the load, against the action of springs 6, Fig. 1, and an electric switch 10 carried by the member 1 operated by the engagement of an abutment member such as the roller 19 carried by the member 1 with a fixed cam or abutment 24. As shown, the member 19 is operatively connected with a bracket 15 carrying spring-pressed members 11 .. 14 which engage with switch contacts 20 .. 23. The member 1 comprises bolts 5 which slide in a block 4 pivoted at 8. In operation the member 11 lights a warning lamp in the driver's cabin, and the members 12, 13, 14 engage later with the contacts 21, 22, 23 and give a bell signal in the cabin and'break the circuits of the " overloading " and " luff-out " switches, or open a main circuit breaker. In a modification, Fig. 4, the hoisting or luffing rope passes round a sheave mounted on the member 1 which slides in a guide 5 pivoted at 7, and an abutment 11 carried by a switch lever 10 engages the inner surface of an eccentric semi-circular cam 13. In both forms the motion of the springs may be damped by a dashpot 16, Fig. 4. As applied to a crane with fixed jib (Figs. 7 and 8 not shown) the fixed cam is replaced by a simple abutment. As applied to an overhead travelling crane (Figs. 9 and 10 not shown), one end of the load rope is secured to the member 1 which carries a switch operated by engagement with a simple abutment. Specifications 25712/08, [Class 78, Lifting &c.], and 3658/09, [Class 78 (iv), Loading &c.], are referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2016731A GB386655A (en) | 1931-07-14 | 1931-07-14 | Improvements in jib cranes, derricks, sheer legs, overhead travelling cranes, telphers, crabs and like lifting devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2016731A GB386655A (en) | 1931-07-14 | 1931-07-14 | Improvements in jib cranes, derricks, sheer legs, overhead travelling cranes, telphers, crabs and like lifting devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB386655A true GB386655A (en) | 1933-01-16 |
Family
ID=10141480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2016731A Expired GB386655A (en) | 1931-07-14 | 1931-07-14 | Improvements in jib cranes, derricks, sheer legs, overhead travelling cranes, telphers, crabs and like lifting devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB386655A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1037679B (en) * | 1956-08-01 | 1958-08-28 | Demag Baggerfabrik G M B H | Device for the automatic limitation of the load torque on cranes and excavators |
| DE1115898B (en) * | 1960-11-07 | 1961-10-26 | Menck & Hambrock Gmbh | Device for the automatic limitation of the load moment in cranes or excavators |
| DE1139257B (en) * | 1960-03-19 | 1962-11-08 | Wilhelm Reich Maschinenfabrik | Device for the automatic limitation of the load torque on cranes |
| DE1180916B (en) * | 1961-09-26 | 1964-11-05 | Rheinstahl Union Brueckenbau | Overload protection device for jib cranes with jib position that can be changed by means of neck rope pull |
| DE1191532B (en) * | 1961-12-14 | 1965-04-22 | Robert Loudon Aitken | Safety load indicator |
| DE1198975B (en) * | 1962-02-09 | 1965-08-19 | Robert Loudon Aitken | Safety device to avoid exceeding the permissible load torque for cranes |
| EP2483573B1 (en) | 2009-10-02 | 2020-01-01 | Pfenning Elektroanlagen GmbH | Straddle carrier for use in container terminals and for other transport purposes |
-
1931
- 1931-07-14 GB GB2016731A patent/GB386655A/en not_active Expired
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1037679B (en) * | 1956-08-01 | 1958-08-28 | Demag Baggerfabrik G M B H | Device for the automatic limitation of the load torque on cranes and excavators |
| DE1139257B (en) * | 1960-03-19 | 1962-11-08 | Wilhelm Reich Maschinenfabrik | Device for the automatic limitation of the load torque on cranes |
| DE1139257C2 (en) * | 1960-03-19 | 1973-06-28 | Wilhelm Reich Maschinenfabrik | Device for automatic limitation of the load torque on cranes |
| DE1115898B (en) * | 1960-11-07 | 1961-10-26 | Menck & Hambrock Gmbh | Device for the automatic limitation of the load moment in cranes or excavators |
| DE1180916B (en) * | 1961-09-26 | 1964-11-05 | Rheinstahl Union Brueckenbau | Overload protection device for jib cranes with jib position that can be changed by means of neck rope pull |
| DE1191532B (en) * | 1961-12-14 | 1965-04-22 | Robert Loudon Aitken | Safety load indicator |
| DE1198975B (en) * | 1962-02-09 | 1965-08-19 | Robert Loudon Aitken | Safety device to avoid exceeding the permissible load torque for cranes |
| EP2483573B1 (en) | 2009-10-02 | 2020-01-01 | Pfenning Elektroanlagen GmbH | Straddle carrier for use in container terminals and for other transport purposes |
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