GB629160A - Improvements in and relating to wave-form modifying systems - Google Patents

Improvements in and relating to wave-form modifying systems

Info

Publication number
GB629160A
GB629160A GB2876/46A GB287646A GB629160A GB 629160 A GB629160 A GB 629160A GB 2876/46 A GB2876/46 A GB 2876/46A GB 287646 A GB287646 A GB 287646A GB 629160 A GB629160 A GB 629160A
Authority
GB
United Kingdom
Prior art keywords
potential
magnitude
control
impedance
voltage drop
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
GB2876/46A
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Publication of GB629160A publication Critical patent/GB629160A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D49/00—Machines or devices for sawing with straight reciprocating saw blades, e.g. hacksaws
    • B23D49/10—Hand-held or hand-operated sawing devices with straight saw blades
    • 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
    • H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
    • H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
    • H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
    • H02P7/24—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices
    • H02P7/26—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using discharge tubes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
    • H03K5/01—Shaping pulses
    • H03K5/08—Shaping pulses by limiting; by thresholding; by slicing, i.e. combined limiting and thresholding
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K7/00—Modulating pulses with a continuously-variable modulating signal
    • H03K7/04—Position modulation, i.e. PPM

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Particle Accelerators (AREA)
  • Stopping Of Electric Motors (AREA)
  • Control Of Ac Motors In General (AREA)
  • Control Of Stepping Motors (AREA)

Abstract

629,160. Control systems for consuming devices. BRITISH THOMSON-HOUSTON CO., Ltd. (General Electric Co.). Jan. 29, 1946, No. 2876. [Class 38 (iv)] [Also in Group XXXVII] In an electronic device for controlling the magnitude and phase of a square wave alternating potential in accordance with the magnitude and sense of a unidirectional potential, a reference square wave alternating potential is applied to the grid of an electronic tube V2, the anode of which is connected to a tap on an impedance 3 in the anode circuit of an electronic tube V1 having a common cathode resistance with V2. The unidirectional control potential is applied to the grid of VI. The amplitude of the reference potential is sufficient to drive V2 from the grid current point to cut off on alternate half-cycles, and the bias developed across the common cathode resistance cuts off V1 while V2 is conducting, and allows V1 to conduct while V2 is cut off. The voltage drop across the impedance is applied to a utilization circuit, which may be a motor control device, and the tap is adjusted so that, when the control potential is zero or a predetermined datum value, the voltage drop across the impedance when V1 conducts equals the voltage drop across the tapped-off portion when V2 conducts, and the potential applied to the utilisation circuit is consequently zero. Deviation of the control potential from zero or datum varies the conducting current of V1 so that a square wave alternating potential appears across the utilisation circuit dependent in magnitude and phase on the magnitude and sense of the control potential. The reference alternating potential may vary sinusoidally.
GB2876/46A 1942-12-09 1946-01-29 Improvements in and relating to wave-form modifying systems Expired GB629160A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US468406A US2427687A (en) 1942-12-09 1942-12-09 Pulse control system

Publications (1)

Publication Number Publication Date
GB629160A true GB629160A (en) 1949-09-13

Family

ID=23859688

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2876/46A Expired GB629160A (en) 1942-12-09 1946-01-29 Improvements in and relating to wave-form modifying systems

Country Status (3)

Country Link
US (1) US2427687A (en)
FR (1) FR964831A (en)
GB (1) GB629160A (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2589767A (en) * 1945-10-19 1952-03-18 Us Sec War Voltage pulse generating circuit
US2470895A (en) * 1945-12-13 1949-05-24 Elbert W Marlowe Impulse type power supply
US3071649A (en) * 1946-06-19 1963-01-01 Bell Telephone Labor Inc Cipher system for pulse code modulation communication system
US2531201A (en) * 1946-06-28 1950-11-21 Bell Telephone Labor Inc Electronic control circuits for radar systems
US2487010A (en) * 1947-01-17 1949-11-01 Honeywell Regulator Co Electric motor control apparatus
US2560720A (en) * 1947-03-11 1951-07-17 Raytheon Mfg Co Electronic timing system
US2650471A (en) * 1947-07-05 1953-09-01 Lewis Eng Co Jet engine fuel control
US2555440A (en) * 1947-09-09 1951-06-05 Gen Precision Lab Inc Pulse generator
US2993664A (en) * 1948-09-15 1961-07-25 Honeywell Regulator Co Automatic instrument landing systems for air-borne craft
US3070795A (en) * 1954-01-25 1962-12-25 Torrence H Chambers Elevation angle computer for stacked beam height finding radar system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2156534A (en) * 1935-11-13 1939-05-02 Bendix Radio Corp Electric discharge device circuits
US2253307A (en) * 1938-02-18 1941-08-19 Smith Corp A O Electrical circuit
US2265996A (en) * 1938-04-25 1941-12-16 Emi Ltd Thermionic valve circuits
US2217957A (en) * 1939-05-26 1940-10-15 Hazeltine Corp Wave-signal translating system

Also Published As

Publication number Publication date
FR964831A (en) 1950-08-25
US2427687A (en) 1947-09-23

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