GB921487A - Apparatus for removing the effect of backlash in a gear drive - Google Patents

Apparatus for removing the effect of backlash in a gear drive

Info

Publication number
GB921487A
GB921487A GB1738261A GB1738261A GB921487A GB 921487 A GB921487 A GB 921487A GB 1738261 A GB1738261 A GB 1738261A GB 1738261 A GB1738261 A GB 1738261A GB 921487 A GB921487 A GB 921487A
Authority
GB
United Kingdom
Prior art keywords
nut
motor
travel
drive
microswitch
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
GB1738261A
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.)
Fisher Scientific Co LLC
Original Assignee
Fisher Scientific Co LLC
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 Fisher Scientific Co LLC filed Critical Fisher Scientific Co LLC
Publication of GB921487A publication Critical patent/GB921487A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/12—Arrangements for adjusting or for taking-up backlash not provided for elsewhere
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H25/2003—Screw mechanisms with arrangements for taking up backlash
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
    • G01N31/16—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using titration
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D7/00—Control of flow
    • G05D7/06—Control of flow characterised by the use of electric means

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Automation & Control Theory (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

921,487. Control of motors. FISHER SCIENTIFIC CO. May 12, 1961 [Sept. 8, 1960], No. 17382/61. Class 38 (3). [Also in Group XXIV] To remove the effects of backlash in an electrically driven gear drive comprising a lead screw and nut, e.g. in automatic titration apparatus, a microswitch operated by the nut at one end of its travel first reverses the electric drive and then, after the slack has been taken up, stops it, ready for the next operating cycle. As shown, the drive comprises two motors 18 and 19, one for each direction of rotation, but it is stated that a single reversing motor may be used. With the switches in the positions shown, motor 18 is energized through relay contacts 30c from a supply 28. At the end of its travel the nut changes over microswitch 16, thus energizing relay coil 30 and de-energizing a second relay 31. This results in the disconnection of motor 18 and the energization of motor 19, causing the nut to move away from the microswitch which returns to the position shown. The circuit for motor 19 is thus broken until a selector switch 29 is changed over to re-establish it and so run the nut to the other end of its travel. In this direction the drive is normally stopped by switch 29, but a safety limit switch 17 is provided. A further gear train 26, 27 drives a recording or other mechanism.
GB1738261A 1960-09-08 1961-05-12 Apparatus for removing the effect of backlash in a gear drive Expired GB921487A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US5479160A 1960-09-08 1960-09-08

Publications (1)

Publication Number Publication Date
GB921487A true GB921487A (en) 1963-03-20

Family

ID=21993564

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1738261A Expired GB921487A (en) 1960-09-08 1961-05-12 Apparatus for removing the effect of backlash in a gear drive

Country Status (1)

Country Link
GB (1) GB921487A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2221510A (en) * 1988-08-03 1990-02-07 Total Feuerschutz Gmbh Actuation delay mechanism

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2221510A (en) * 1988-08-03 1990-02-07 Total Feuerschutz Gmbh Actuation delay mechanism
GB2221510B (en) * 1988-08-03 1992-08-05 Total Feuerschutz Gmbh Actuation delay mechanism
AT401093B (en) * 1988-08-03 1996-06-25 Total Feuerschutz Gmbh ELECTROMECHANICAL DEVICE FOR THE DELAYED OPERATION OF A QUICK OPENING VALVE

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