GB505177A - Improvements relating to the automatic control of grinding mills and other machines - Google Patents

Improvements relating to the automatic control of grinding mills and other machines

Info

Publication number
GB505177A
GB505177A GB29830/37A GB2983037A GB505177A GB 505177 A GB505177 A GB 505177A GB 29830/37 A GB29830/37 A GB 29830/37A GB 2983037 A GB2983037 A GB 2983037A GB 505177 A GB505177 A GB 505177A
Authority
GB
United Kingdom
Prior art keywords
relay
controlled
motor
circuit
nov
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
GB29830/37A
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.)
Hardinge Inc
Original Assignee
Hardinge Inc
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 Hardinge Inc filed Critical Hardinge Inc
Publication of GB505177A publication Critical patent/GB505177A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/18—Details
    • B02C17/1805—Monitoring devices for tumbling mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C25/00—Control arrangements specially adapted for crushing or disintegrating
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
    • H02P29/40—Regulating or controlling the amount of current drawn or delivered by the motor for controlling the mechanical load

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Power Engineering (AREA)
  • Jigging Conveyors (AREA)
  • Disintegrating Or Milling (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Crushing And Grinding (AREA)

Abstract

505,177. Automatic control systems. HARDINGE CO., Inc. Nov. 1 1937, No. 29830. Convention date, Nov. 1.1, 1936. [Class 38 (iv)] Sound output.-The rate of feed to a mechanism is automatically controlled by the sound vibrations produced, these being converted into electrical power variations in a control circuit in which the amplitude of such power may be adjusted to a predetermined noise level. Thus a microphone adjacent to a ball mill, and in series with an adjustable resistance and the primary winding of a transformer, may cause current variation in a secondary circuit containing a rectifier, a relay, and a current indicator, and the resistance may be set so that the relay will respond at a given noise level to effect control of an electric motor operating feeding means. The motor circuit may be controlled through a second relay having a time delay, for example a thermal switch having a heating winding controlled by the first relay. The Figure shows a mill 11 and a motor 116 operating feeding means 113. Three energy sources 140, 141, 142 may be added in sequence in the motor circuit to give three feeding speeds, by the operation of two relays 145, 132, the three operating windings of which are selectively controlled by a damped relay 123 receiving rectified current from an amplifier 121, the input to which is controlled by a microphone 120 and means 122 for adjusting the amplifier output.
GB29830/37A 1936-11-11 1937-11-01 Improvements relating to the automatic control of grinding mills and other machines Expired GB505177A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US505177XA 1936-11-11 1936-11-11

Publications (1)

Publication Number Publication Date
GB505177A true GB505177A (en) 1939-05-01

Family

ID=21965697

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29830/37A Expired GB505177A (en) 1936-11-11 1937-11-01 Improvements relating to the automatic control of grinding mills and other machines

Country Status (3)

Country Link
DE (1) DE716847C (en)
FR (1) FR828748A (en)
GB (1) GB505177A (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE924964C (en) * 1949-08-03 1955-03-10 David Weston Drum mill for grinding hard material
DE1128723B (en) * 1953-10-19 1962-04-26 Esch Werke Kg Control and safety device for highly stressed machines, e.g. B. Large gyro crusher
DE1107054B (en) * 1957-05-08 1961-05-18 Siemens Ag Filling regulation for ball mills
DE1194231B (en) * 1961-08-21 1965-06-03 Polysius Gmbh Procedure for regulating classifier grinding systems
DE1208160B (en) * 1964-01-09 1965-12-30 Polysius Gmbh Procedure for regulating classifier grinding systems
DE4215455C2 (en) * 1992-05-11 1996-05-15 Franc Godler Device and method for determining the level of mills
CN103433098B (en) * 2013-08-20 2015-10-28 太原钢铁(集团)有限公司 A kind of method improving ball mill grinding efficiency
CN115121360A (en) * 2022-06-28 2022-09-30 华夏生生药业(北京)有限公司 Improved current monitoring device for pulverizer

Also Published As

Publication number Publication date
DE716847C (en) 1942-01-31
FR828748A (en) 1938-05-27

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