GB1252426A – – Google Patents
GB1252426A – – Google Patents
Info
Publication number
GB1252426A
GB1252426A
GB1252426DA
GB1252426A
GB 1252426 A
GB1252426 A
GB 1252426A
GB 1252426D A
GB1252426D A
GB 1252426DA
GB 1252426 A
GB1252426 A
GB 1252426A
Authority
GB
United Kingdom
Prior art keywords
boom
potentiometer
crane
load
load cell
Prior art date
1967-11-13
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
Application number
Priority date (The priority date 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 date listed.)
1967-11-13
Filing date
1968-10-23
Publication date
1971-11-03
1968-10-23
Application filed
filed
Critical
1971-11-03
Publication of GB1252426A
publication
Critical
patent/GB1252426A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
E—FIXED CONSTRUCTIONS
E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
E02F—DREDGING; SOIL-SHIFTING
E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 – E02F7/00
E02F9/26—Indicating devices
Abstract
1,252,426. Cranes and other lifting apparatus. EATON YALE & TOWNE Inc. 23 Oct., 1968 [13 Nov., 1967], No. 50421/68. Heading B8B. [Also in Division G1] A loading indicator for a crane 20 comprises a load cell 30 and a function generator 68, including a potentiometer 53 mounted on the boom 22 and having a winding of which the resistance is variable as the cosine of the angle of the boom to the horizontal, the potentiometer wiper contact being attached to a pendulum to cause motion of the contact relative to the boom as the latter is raised, and a further potentiometer 54 having a plurality of top points 60b to 60k, each connected to a separate amplifier 86-94 so that the voltage distribution on the winding of the further potentiometer simulates a desired load vs. boom angle law, Fig. 3 (not shown), an alarm 70 being actuated when the output from the wiper contact of the further potentiometer exceeds a predetermined value. A meter 37 is connected to display either crane load or crane radius and which latter is the horizontal projection of the crane boom length L, i.e. L cos a where α is boom elevation angle. The voltage acting upon the alarm is the product of load and radius and is displayed on a meter 38 calibrated in percentages of crane capacity. The voltages from amplifiers 86-94 are individually adjustable to simulate a required law on potentiometer 54 by switches 75a-75j controlling amplifier input resistances and/or by a switch 74 in the feedback loop of an amplifier 73 supplying the output of the load cell to the amplifiers. Alternatively a programme card interposing preset resistors in the amplifier input circuits may be utilized. The load cell is a differential transformer. Reference has been directed by the Comptroller to Specification 1,219,636.
GB1252426D
1967-11-13
1968-10-23
Expired
GB1252426A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US682387A
US3505514A
(en)
1967-11-13
1967-11-13
Load warning device
Publications (1)
Publication Number
Publication Date
GB1252426A
true
GB1252426A
(en)
1971-11-03
Family
ID=24739474
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB1252426D
Expired
GB1252426A
(en)
1967-11-13
1968-10-23
Country Status (5)
Country
Link
US
(1)
US3505514A
(en)
BR
(1)
BR6803996D0
(en)
DE
(1)
DE1807260A1
(en)
FR
(1)
FR1605203A
(en)
GB
(1)
GB1252426A
(en)
Families Citing this family (19)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3618064A
(en)
*
1969-08-20
1971-11-02
Eaton Yale & Towne
Crane computer
US3638211A
(en)
*
1969-10-08
1972-01-25
Litton Systems Inc
Crane safety system
US3631537A
(en)
*
1970-01-26
1971-12-28
Harnischfeger Corp
Calibration circuit for boom crane load safety device
US3671728A
(en)
*
1970-10-05
1972-06-20
Hughes Aircraft Co
Electronic repeater servo
US3740534A
(en)
*
1971-05-25
1973-06-19
Litton Systems Inc
Warning system for load handling equipment
JPS5413651B2
(en)
*
1971-12-29
1979-06-01
US3833932A
(en)
*
1972-10-12
1974-09-03
Eaton Corp
Boom length operating radius indicator and warning device
US3826321A
(en)
*
1973-05-25
1974-07-30
Trans Sonics Inc
Load weighing system for cranes with rotatable booms
US3866200A
(en)
*
1973-07-25
1975-02-11
Forney International
Load measuring and overload warning system
US3997071A
(en)
*
1975-08-14
1976-12-14
Laserplane Corporation
Method and apparatus for indicating effective digging depth of a backhoe
US4084247A
(en)
*
1976-10-26
1978-04-11
Fmc Corporation
Fluid loading arm alarm system
FR2422582A1
(en)
*
1978-04-12
1979-11-09
Coignet Sa
MOLDING COMPOSITION DETECTOR OF A LIFTING END
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
US5209361A
(en)
*
1991-10-31
1993-05-11
Grubb Jr Lloyd T
Multiple-cable lifting head with load weighing mechanism for aerial booms and cranes
US5461803A
(en)
*
1994-03-23
1995-10-31
Caterpillar Inc.
System and method for determining the completion of a digging portion of an excavation work cycle
US20040200644A1
(en)
*
2003-04-08
2004-10-14
Alan Paine
Safe load lifting measurement device
US10410124B1
(en)
*
2013-01-21
2019-09-10
Link-Belt Cranes, L.P., Lllp
Display for displaying lifting capacity of a lifting machine and related methods
US20140320293A1
(en)
*
2014-07-08
2014-10-30
Caterpillar Inc.
Operator alert and height limitation system for load carrying machines
Family Cites Families (8)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US2330060A
(en)
*
1941-10-28
1943-09-21
Gen Electric
Safe load indicator for crane hoists
US2418576A
(en)
*
1944-06-24
1947-04-08
Myrtle L Conrad
Signal system for cranes
DE1029547B
(en)
*
1954-09-13
1958-05-08
Orenstein & Koppel Ag
Safety device for hoists with variable overhang
US2772411A
(en)
*
1954-10-25
1956-11-27
Fishfader S
Boom angle indicator for cranes
US2858070A
(en)
*
1955-11-17
1958-10-28
Scharff Leon
Moment computing and indicating systems
FR1157464A
(en)
*
1956-08-24
1958-05-29
Bondy Atel
Load limiter-controller for handling cranes
US3079080A
(en)
*
1960-02-12
1963-02-26
Henry L Mason
Crane warning system
US3262022A
(en)
*
1964-02-13
1966-07-19
Gen Micro Electronics Inc
Packaged electronic device
1967
1967-11-13
US
US682387A
patent/US3505514A/en
not_active
Expired – Lifetime
1968
1968-10-23
GB
GB1252426D
patent/GB1252426A/en
not_active
Expired
1968-11-06
DE
DE19681807260
patent/DE1807260A1/en
active
Pending
1968-11-12
FR
FR173380A
patent/FR1605203A/en
not_active
Expired
1968-11-13
BR
BR203996/68A
patent/BR6803996D0/en
unknown
Also Published As
Publication number
Publication date
US3505514A
(en)
1970-04-07
DE1807260A1
(en)
1969-06-12
FR1605203A
(en)
1973-07-06
BR6803996D0
(en)
1973-03-08
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Device for displaying an approach of an object, in particular a crane boom, to a high-voltage line
LANGILL
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Tapped potentiometers and biased-diode function generators utilized in the analog simulation of multivariant functions in nonlinear control systems
SU1025652A1
(en)
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Method for adjusting electromechanical lifting capacity limiter of boom crane
Legal Events
Date
Code
Title
Description
1972-03-15
PS
Patent sealed [section 19, patents act 1949]
1984-06-27
PCNP
Patent ceased through non-payment of renewal fee
