GB1389139A - Apparatus for determining or displaying the load applied to a turntable ladder or telescopic mast - Google Patents

Apparatus for determining or displaying the load applied to a turntable ladder or telescopic mast

Info

Publication number
GB1389139A
GB1389139A GB2794373A GB2794373A GB1389139A GB 1389139 A GB1389139 A GB 1389139A GB 2794373 A GB2794373 A GB 2794373A GB 2794373 A GB2794373 A GB 2794373A GB 1389139 A GB1389139 A GB 1389139A
Authority
GB
United Kingdom
Prior art keywords
ladder
load
gauges
telescopic mast
determining
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
Application number
GB2794373A
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.)
Kloeckner Humboldt Deutz AG
Original Assignee
Kloeckner Humboldt Deutz AG
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.)
Filing date
Publication date
Application filed by Kloeckner Humboldt Deutz AG filed Critical Kloeckner Humboldt Deutz AG
Publication of GB1389139A publication Critical patent/GB1389139A/en
Expired legal-status Critical Current

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
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C5/00—Ladders characterised by being mounted on undercarriages or vehicles Securing ladders on vehicles
    • E06C5/32—Accessories, e.g. brakes on ladders
    • E06C5/34—Indicating devices
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C5/00—Ladders characterised by being mounted on undercarriages or vehicles Securing ladders on vehicles
    • E06C5/32—Accessories, e.g. brakes on ladders
    • E06C5/36—Safety devices against slipping or falling of ladders; Safety devices against overloading ladders
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
    • G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
    • G01L1/225—Measuring circuits therefor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
    • G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
    • G01L1/225—Measuring circuits therefor
    • G01L1/2262—Measuring circuits therefor involving simple electrical bridges
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/0061—Force sensors associated with industrial machines or actuators
    • G01L5/0071—Specific indicating arrangements, e.g. of overload

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Ladders (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

1389139 Measuring load on telescopic mast, extensible ladder electrically KLOCKNERHUMBOLDT-DEUTZ AG 12 June 1973 [22 June 1972] 27943/73 Heading G1N [Also in Division El] Apparatus for determining or indicating the load applied to an extensible turntable ladder 1 or to a telescopic mast comprises one or more electrical resistance strain gauges attached to a region or regions of the ladder which is or are stretched under load and electrical circuitry for indicating the magnitude of the load and switching off or reducing the drive to the ladder or mast. The gauge is or gauges are attached to one or both upper longitudinal members of the lowest ladder section 2. The gauges 9 are connected in a bridge circuit Fig.3 (not shown) with temperature compensating gauges 10 mounted so as not to be stretched by the load, and the output signal from the bridge is applied via amplifier 14 to a voltmeter 16 and comparison-and-switching device 15 connected to an electro-magnetically actuated switch 17 connected to the ladder drive means.
GB2794373A 1972-06-22 1973-06-12 Apparatus for determining or displaying the load applied to a turntable ladder or telescopic mast Expired GB1389139A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722230546 DE2230546C3 (en) 1972-06-22 1972-06-22 Device for determining or displaying the load on an attractable turntable ladder

Publications (1)

Publication Number Publication Date
GB1389139A true GB1389139A (en) 1975-04-03

Family

ID=5848485

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2794373A Expired GB1389139A (en) 1972-06-22 1973-06-12 Apparatus for determining or displaying the load applied to a turntable ladder or telescopic mast

Country Status (3)

Country Link
DE (1) DE2230546C3 (en)
FR (1) FR2189731B1 (en)
GB (1) GB1389139A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0192247A1 (en) * 1985-02-21 1986-08-27 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Atomizer for spraying fluids on the surface of work pieces
GB2387374A (en) * 2002-04-12 2003-10-15 Bamford Excavators Ltd Detecting damage to structural member e.g. boom of load handling vehicle
US7012540B2 (en) 2001-03-02 2006-03-14 Putzmeister Aktiengesellschaft Mobile working machine provided with stability monitoring
WO2009112004A1 (en) * 2008-03-08 2009-09-17 Terex-Demag Gmbh Jib comprising a metal hollow profile with a reinforcement layer consisting of a fibre-plastic composite and sensor element
US11499370B2 (en) 2018-05-01 2022-11-15 Otto Ladder Safety, Inc. Ladder having sensor and computing device for same
US11635307B1 (en) 2022-04-26 2023-04-25 Stress Engineering Services, Inc. Hall effect transducer assemblies and methods

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3106321A1 (en) * 1981-02-20 1982-09-09 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt ADJUSTMENT METHOD FOR ANTENNAS ARRANGED ON VARIABLE DIRECTIVE FUNCTIONS
DE9102783U1 (en) * 1991-03-08 1991-05-29 Niederholz, Johannes, 4132 Kamp-Lintfort Force measuring device
DE4332137C1 (en) * 1993-09-17 1995-03-09 Georg Wazau Dr Ing Reaction torque pick-up having one degree of translational freedom
US9828220B2 (en) * 2016-03-14 2017-11-28 Goodrich Corporation Systems and methods for detecting rescue hoist loads

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE675018C (en) * 1932-12-18 1939-04-27 Kloeckner Humboldt Deutz Akt G Tilt protection for motorized turntable ladders
DE1803457C3 (en) * 1968-10-16 1974-09-12 Pietzsch, Ludwig, Dr.-Ing., 7500 Karlsruhe Overload protection for jib cranes

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0192247A1 (en) * 1985-02-21 1986-08-27 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Atomizer for spraying fluids on the surface of work pieces
US7012540B2 (en) 2001-03-02 2006-03-14 Putzmeister Aktiengesellschaft Mobile working machine provided with stability monitoring
GB2387374A (en) * 2002-04-12 2003-10-15 Bamford Excavators Ltd Detecting damage to structural member e.g. boom of load handling vehicle
US6842119B2 (en) 2002-04-12 2005-01-11 J. C. Bamford Excavators, Limited Detecting damage to a structural member
GB2387374B (en) * 2002-04-12 2005-03-02 Bamford Excavators Ltd Detecting damage to a structural member
WO2009112004A1 (en) * 2008-03-08 2009-09-17 Terex-Demag Gmbh Jib comprising a metal hollow profile with a reinforcement layer consisting of a fibre-plastic composite and sensor element
US11499370B2 (en) 2018-05-01 2022-11-15 Otto Ladder Safety, Inc. Ladder having sensor and computing device for same
US11635307B1 (en) 2022-04-26 2023-04-25 Stress Engineering Services, Inc. Hall effect transducer assemblies and methods

Also Published As

Publication number Publication date
DE2230546C3 (en) 1982-01-21
DE2230546A1 (en) 1974-01-10
FR2189731B1 (en) 1975-08-22
DE2230546B2 (en) 1981-04-02
FR2189731A1 (en) 1974-01-25

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Legal Events

Date Code Title Description
PS Patent sealed
PLE Entries relating assignments, transmissions, licences in the register of patents
PCNP Patent ceased through non-payment of renewal fee