GB1358871A - Crane load indicator arrangement - Google Patents
Crane load indicator arrangementInfo
- Publication number
- GB1358871A GB1358871A GB3002471A GB3002471A GB1358871A GB 1358871 A GB1358871 A GB 1358871A GB 3002471 A GB3002471 A GB 3002471A GB 3002471 A GB3002471 A GB 3002471A GB 1358871 A GB1358871 A GB 1358871A
- Authority
- GB
- United Kingdom
- Prior art keywords
- current
- path
- input
- amplifier
- resistor
- 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
- B66C23/905—Devices for indicating or limiting lifting moment electrical
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06G—ANALOGUE COMPUTERS
- G06G7/00—Devices in which the computing operation is performed by varying electric or magnetic quantities
- G06G7/12—Arrangements for performing computing operations, e.g. operational amplifiers
- G06G7/26—Arbitrary function generators
- G06G7/28—Arbitrary function generators for synthesising functions by piecewise approximation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C2700/00—Cranes
- B66C2700/08—Electrical assemblies or electrical control devices for cranes, winches, capstans or electrical hoists
- B66C2700/084—Protection measures
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Theoretical Computer Science (AREA)
- Software Systems (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
- Measurement Of Current Or Voltage (AREA)
- Amplifiers (AREA)
Abstract
1358871 Function generators PYE Ltd 25 June 1971 30024/71 Heading G4G [Also in Division G1] A low generator comprises amplifier 55 with feedback resistor 56 and input paths 57-61 of which paths 57-60 are connected to an input voltage V IN , variable over the range 0 to + 5 v. Input path 61 connects to a -5v. reference voltage via a preset potentiometer so that current I 5 is constant as shown at 76. Input 57 includes resistor 62 so current I 1 flowing to virtual earth input of amplifier 55 varies linearly with V IN as shown at 63. Current I 2 flowing in path 58 increases linearly with V IN until transistor 66 conducts and is thereafter constant as shown at 69. Path 59 acts similarly to path 58 but includes an inverting amplifier 70 so current I 3 is of opposite polarity to I 1 , I 2 and is as shown at 72. Path 60 includes a series switching circuit and no current flows in this path until V IN reaches a level, determined by potentiometer 73, at which the switching circuit conducts when current I 4 commences to flow and increases linearly with V IN as shown at 74. Total current I TOT at amplifier 55 input is the sum of currents I 1 to I 5 and varies as shown at 77. The output voltage of the amplifier is always such as to provide a current through resistor 56 equal and opposite to I TOT so that amplifier output voltage follows the curve 77 but is of opposite sign.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3002471A GB1358871A (en) | 1971-06-25 | 1971-06-25 | Crane load indicator arrangement |
JP6595671A JPS5538613B1 (en) | 1971-06-25 | 1971-08-30 | |
DE2230142A DE2230142A1 (en) | 1971-06-25 | 1972-06-21 | DEVICE FOR DISPLAYING THE MAXIMUM LOAD FOR A CRANE |
US265329A US3870160A (en) | 1971-06-25 | 1972-06-22 | Crane safe load indicator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3002471A GB1358871A (en) | 1971-06-25 | 1971-06-25 | Crane load indicator arrangement |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1358871A true GB1358871A (en) | 1974-07-03 |
Family
ID=10301038
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3002471A Expired GB1358871A (en) | 1971-06-25 | 1971-06-25 | Crane load indicator arrangement |
Country Status (4)
Country | Link |
---|---|
US (1) | US3870160A (en) |
JP (1) | JPS5538613B1 (en) |
DE (1) | DE2230142A1 (en) |
GB (1) | GB1358871A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0003939A2 (en) * | 1978-03-01 | 1979-09-05 | Michel Gutierrez | Improvements in hydraulically operated lifting devices |
GB2353513A (en) * | 1999-07-07 | 2001-02-28 | Liebherr Werk Ehingen | Crane lifting capacity optimisation |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4057792A (en) * | 1970-01-21 | 1977-11-08 | Ludwig Pietzsch | Overload safety device for telescopic cranes |
GB1462785A (en) * | 1973-05-11 | 1977-01-26 | Pye Ltd | Crane load indicating arrangement |
DE2400310C3 (en) * | 1974-01-04 | 1981-02-26 | Erhard 5509 Kell Kirsten | Tilting moment protection for a telescopic jib crane |
AT343860B (en) * | 1975-02-04 | 1978-06-26 | Krueger & Co Kg | DEVICE FOR CONTROLLING A CRANE JIB DRIVE |
US4054055A (en) * | 1976-08-06 | 1977-10-18 | Precilec | Device for controlling the load of a lifting appliance |
US4236864A (en) * | 1978-11-09 | 1980-12-02 | Raymond Couture | Safety control system for the boom of a crane |
EP0029768B1 (en) * | 1979-11-12 | 1986-04-23 | FMC EUROPE S.A. Société anonyme dite: | Process and apparatus for watching and controlling an articulated fluid-transfer arm for linking a ship to a platform in the sea |
KR910002234B1 (en) * | 1982-12-01 | 1991-04-08 | 히다찌 겡끼 가부시기가이샤 | Load weight indicating system for load moving machine |
US4906981A (en) * | 1988-07-20 | 1990-03-06 | Nield Barry J | Method and apparatus for monitoring the effective load carried by a crane |
GB9326347D0 (en) * | 1993-12-23 | 1994-02-23 | Grove Europ Limited | Improvements in and relating to telescopic booms |
JP4320931B2 (en) * | 2000-03-27 | 2009-08-26 | コベルコクレーン株式会社 | Crane overload prevention method and overload prevention device |
US20040200644A1 (en) * | 2003-04-08 | 2004-10-14 | Alan Paine | Safe load lifting measurement device |
FR2884104B1 (en) * | 2005-03-29 | 2009-07-03 | Pierre Dumas | SWITCH ADJUSTMENT |
JP6382769B2 (en) | 2014-08-07 | 2018-08-29 | 東京エレクトロン株式会社 | Joining apparatus, joining system, joining method, program, and computer storage medium |
JP6177739B2 (en) | 2014-08-07 | 2017-08-09 | 東京エレクトロン株式会社 | Joining apparatus, joining system, joining method, program, and computer storage medium |
JP6956645B2 (en) * | 2018-02-06 | 2021-11-02 | 住友重機械建機クレーン株式会社 | Suspension load arithmetic unit |
IT201800010918A1 (en) * | 2018-12-10 | 2020-06-10 | Manitou Italia Srl | Improved safety system for self-propelled machinery. |
US10994970B2 (en) | 2019-07-29 | 2021-05-04 | Jim D. Wiethorn | Crane risk logic apparatus and system and method for use of same |
CN111675103B (en) * | 2020-06-17 | 2022-04-15 | 三一海洋重工有限公司 | Arm support pitching switching control method and control system |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3079080A (en) * | 1960-02-12 | 1963-02-26 | Henry L Mason | Crane warning system |
US3534355A (en) * | 1967-03-28 | 1970-10-13 | Dole Valve Co | Load warning device |
US3641551A (en) * | 1968-12-19 | 1972-02-08 | Grove Mfg Co | Safe load control system for telescopic crane booms |
US3559143A (en) * | 1969-07-11 | 1971-01-26 | Clary Corp | Apparatus for generating trigonometric functions corresponding to angular movement |
US3618064A (en) * | 1969-08-20 | 1971-11-02 | Eaton Yale & Towne | Crane computer |
JPS552342B2 (en) * | 1973-08-04 | 1980-01-19 |
-
1971
- 1971-06-25 GB GB3002471A patent/GB1358871A/en not_active Expired
- 1971-08-30 JP JP6595671A patent/JPS5538613B1/ja active Pending
-
1972
- 1972-06-21 DE DE2230142A patent/DE2230142A1/en not_active Withdrawn
- 1972-06-22 US US265329A patent/US3870160A/en not_active Expired - Lifetime
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0003939A2 (en) * | 1978-03-01 | 1979-09-05 | Michel Gutierrez | Improvements in hydraulically operated lifting devices |
FR2418766A1 (en) * | 1978-03-01 | 1979-09-28 | Michel Gutierrez | IMPROVEMENT IN HYDRAULIC CONTROLLED LIFTING DEVICES |
EP0003939A3 (en) * | 1978-03-01 | 1980-04-16 | Michel Gutierrez | Improvements in hydraulically operated lifting devices |
GB2353513A (en) * | 1999-07-07 | 2001-02-28 | Liebherr Werk Ehingen | Crane lifting capacity optimisation |
GB2353513B (en) * | 1999-07-07 | 2003-09-03 | Liebherr Werk Ehingen | Lifting capacity optimisation when making crane movements |
Also Published As
Publication number | Publication date |
---|---|
DE2230142A1 (en) | 1973-01-11 |
US3870160A (en) | 1975-03-11 |
JPS5538613B1 (en) | 1980-10-06 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
433D | Application made for revocation (sect. 33/1949) | ||
433A | Case decided by the comptroller ** patent amended (sect. 33/1949) | ||
SPA | Amended specification published | ||
PCNP | Patent ceased through non-payment of renewal fee |