GB1127794A - Load indicating and overload protection means for power presses - Google Patents

Load indicating and overload protection means for power presses

Info

Publication number
GB1127794A
GB1127794A GB833566A GB833566A GB1127794A GB 1127794 A GB1127794 A GB 1127794A GB 833566 A GB833566 A GB 833566A GB 833566 A GB833566 A GB 833566A GB 1127794 A GB1127794 A GB 1127794A
Authority
GB
United Kingdom
Prior art keywords
load
lamps
press
feb
amplifier
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
GB833566A
Inventor
Peter Spear
Sidney Derry
Henry Patrick Norton
Eric Shennen Johnson
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.)
Rubery Owen and Co Ltd
Original Assignee
Rubery Owen and Co Ltd
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 Rubery Owen and Co Ltd filed Critical Rubery Owen and Co Ltd
Priority to GB833566A priority Critical patent/GB1127794A/en
Priority to FR96318A priority patent/FR1512271A/en
Publication of GB1127794A publication Critical patent/GB1127794A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/0094—Press load monitoring means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/28—Arrangements for preventing distortion of, or damage to, presses or parts thereof
    • B30B15/281—Arrangements for preventing distortion of, or damage to, presses or parts thereof overload limiting devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Control Of Presses (AREA)

Abstract

1,127,794. Measuring power press loading electrically. RUBERY, OWEN & CO. Ltd. Feb.20, 1967 [Feb.25, 1966], No.8335/66. Heading G1N. Load in a power press is detected by strain gauge resistors 10, 11 connected in a bridge circuit energized at 2, 000 C.P.S. from an oscillator 13 fed from a stabilized power supply 21. The bridge imbalance voltage indicative of the load is amplified at 15, fed to a phase sensitive demodulator 16 and via a D.C. amplifier 17 to a trigger unit 18 which controls a series of indicator lamps 19. The lamps are successively energized as the load increases, the number of lamps lighted indicating the load as a percentage of a datum load. The trigger unit also controls a cut-out unit 20 which stops the press in the event of serious overload. A servosystem is provided which is operative under no-load conditions only, to return a null indicating voltmeter to zero in the event of drift due to temperature variations, zero shift of the D.C. amplifier &c., so that a true indication of the press loading is given by the lamps.
GB833566A 1966-02-25 1966-02-25 Load indicating and overload protection means for power presses Expired GB1127794A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB833566A GB1127794A (en) 1966-02-25 1966-02-25 Load indicating and overload protection means for power presses
FR96318A FR1512271A (en) 1966-02-25 1967-02-24 Load indication and overload protection device for mechanical presses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB833566A GB1127794A (en) 1966-02-25 1966-02-25 Load indicating and overload protection means for power presses

Publications (1)

Publication Number Publication Date
GB1127794A true GB1127794A (en) 1968-09-18

Family

ID=9850570

Family Applications (1)

Application Number Title Priority Date Filing Date
GB833566A Expired GB1127794A (en) 1966-02-25 1966-02-25 Load indicating and overload protection means for power presses

Country Status (2)

Country Link
FR (1) FR1512271A (en)
GB (1) GB1127794A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2570020B1 (en) * 1984-09-11 1988-07-22 Commissariat Energie Atomique AUTOMATIC PRESS

Also Published As

Publication number Publication date
FR1512271A (en) 1968-02-02

Similar Documents

Publication Publication Date Title
US3059710A (en) Indirect measurement of vertical forces
GB1375610A (en)
US3618064A (en) Crane computer
ES394567A1 (en) Measuring and servicing the drilling fluid in a well
GB1127794A (en) Load indicating and overload protection means for power presses
GB1287024A (en) A strain measuring and display system including a strain gage transducer bridge circuit arrangement
ES460838A1 (en) Composite transducer
US3557625A (en) Percentage fat analyzer
LU52273A1 (en)
GB1196056A (en) Analogue Converter.
GB1479192A (en) Hysteresis correction
US3693083A (en) Manual digital scale
GB1164136A (en) Measurement Bridge
GB1262868A (en) Apparatus for detecting a leak in a fluid-pressure system
GB1158001A (en) Improvements in or relating to Condition Responsive Bridge Circuits
JPS6475988A (en) Alarming dosimeter
SU121426A1 (en) Permanent pressure control device for metal rolls
JPS5242167A (en) Semiconductor pressure gauge
JPS5721100A (en) X-ray generator
GB1216099A (en) Improvements in or relating to rolling mills
GB839121A (en) Improvements in and relating to load measuring apparatus
SU406166A1 (en) COMPENSATED DEFORMATION METER
GB1177539A (en) Improvements in or relating to Proximity Gauges.
GB1338501A (en) Direct indicating device for measuring respiratory resistance
GB1405659A (en) Beam balance for an automatic checking system