GB1307081A – Safe load apparatus for a material handling device
– Google Patents
GB1307081A – Safe load apparatus for a material handling device
– Google Patents
Safe load apparatus for a material handling device
Info
Publication number
GB1307081A
GB1307081A
GB748370A
GB748370A
GB1307081A
GB 1307081 A
GB1307081 A
GB 1307081A
GB 748370 A
GB748370 A
GB 748370A
GB 748370 A
GB748370 A
GB 748370A
GB 1307081 A
GB1307081 A
GB 1307081A
Authority
GB
United Kingdom
Prior art keywords
boom
linkage
pivoted
moment
load
Prior art date
1969-02-17
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
GB748370A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Baldwin Lima Hamilton Corp
Original Assignee
Baldwin Lima Hamilton Corp
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.)
1969-02-17
Filing date
1970-02-17
Publication date
1973-02-14
1970-02-17
Application filed by Baldwin Lima Hamilton Corp
filed
Critical
Baldwin Lima Hamilton Corp
1973-02-14
Publication of GB1307081A
publication
Critical
patent/GB1307081A/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
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
Abstract
1307081 Safe-load indicators BALDWINLIMA-HAMILTON CORP 17 Feb 1970 [17 Feb 1969] 7483/70 Heading B8B [Also in Division E1] A safe-load indicator for a material handling device is shown applied to a mobile crane 10 with an extensible boom 14 mounted for luffing at pivot pin 20 on a support 18 arranged for slewing on a vehicle 12. The indicator includes a boom orientation responsive linkage 46 with a support arm 62 pivoted at 70 on boom base section 16 and having a horizontal leg 63 maintained always horizontal by a parallelogram effect due to link 67 pivoted thereto and to the support 18. The linkage 46 comprises first and second parallel arms 72, 74 respectively pivoted at 68, 70 to the leg 63 at their lower ends, and at 76, 78 at their upper ends to opposite ends of a horizontal leg 80 of a T cam follower bar assembly 82 including a ventical leg 84 with a slot 86 therein. The slot 86 receives a roller 87 which is part of a boom extension responsive assembly 50. comprising as spring, motor 104 tensioned to reel in a cable 108 attached at its free end to boom head block 28. Bevel gears 112, 114 drive a screw-shaft 116 on which is threaded a. travelling block 120 carrying the roller 87. The linkage 46 thus pivots one way. in response to raising of the boom 14 and in the opposite direction in response to extension of the boom. 14, the position of the linkage being indicative of the maximum permissible moment allowable. One or other of. two potentiometers 142, 144, adjusted from the linkage 46 by drive links 132, 158, is selected by a switch 154 to correspond to operation with or without outriggers and the selected output, representing the allowable load moment, is passed to an indicator assembly 44 where it is compared with the load moment; measured by a strain gauge 40 connected to pivot pin 23 of luffing cylinder 22. A meter 58 is calibrated to show percentage of the permissible moment and a light 60 warns of an overload condition. A linkage movement modifying mechanism 48 is connected by a push-pull cable 124 to a cam bar 122 pivoted to a block 118 and contacted on its, lower face by a roller 121 on the travelling block120. The lower face of the cam bar 122 is cut to correspond to the required permissible load moment curve, Fig. 2 (not shown), and may thus take into account the crushing strength of the boom 14 when operating at a small working radius, as well as the normal tipping effect.
GB748370A
1969-02-17
1970-02-17
Safe load apparatus for a material handling device
Expired
GB1307081A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US79973969A
1969-02-17
1969-02-17
Publications (1)
Publication Number
Publication Date
GB1307081A
true
GB1307081A
(en)
1973-02-14
Family
ID=25176625
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB748370A
Expired
GB1307081A
(en)
1969-02-17
1970-02-17
Safe load apparatus for a material handling device
Country Status (7)
Country
Link
BE
(1)
BE746005A
(en)
CH
(1)
CH525152A
(en)
DE
(1)
DE2007197A1
(en)
FR
(1)
FR2037096B1
(en)
GB
(1)
GB1307081A
(en)
NL
(1)
NL7002217A
(en)
SE
(1)
SE356282B
(en)
Family Cites Families (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB852082A
(en)
*
1958-02-14
1960-10-26
Robert Loudon Aitken
Improvements in safe-load indicating devices for cranes or the like
GB980132A
(en)
*
1962-02-09
1965-01-13
Robert Loudon Aitken
Improvements in safe load indicating devices for cranes
FR1357347A
(en)
*
1963-05-17
1964-04-03
Cole E K Ltd
Safety device, for example, for a crane comprising a member having to tilt in a vertical plane
1970
1970-02-16
BE
BE746005D
patent/BE746005A/en
unknown
1970-02-16
SE
SE191870A
patent/SE356282B/xx
unknown
1970-02-17
DE
DE19702007197
patent/DE2007197A1/en
active
Pending
1970-02-17
NL
NL7002217A
patent/NL7002217A/xx
unknown
1970-02-17
CH
CH227970A
patent/CH525152A/en
not_active
IP Right Cessation
1970-02-17
FR
FR7005675A
patent/FR2037096B1/fr
not_active
Expired
1970-02-17
GB
GB748370A
patent/GB1307081A/en
not_active
Expired
Also Published As
Publication number
Publication date
FR2037096A1
(en)
1970-12-31
NL7002217A
(en)
1970-08-19
SE356282B
(en)
1973-05-21
BE746005A
(en)
1970-07-31
DE2007197A1
(en)
1970-09-03
CH525152A
(en)
1972-07-15
FR2037096B1
(en)
1975-02-21
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Legal Events
Date
Code
Title
Description
1973-06-27
PS
Patent sealed
1975-09-10
PLNP
Patent lapsed through nonpayment of renewal fees
