GB558931A - Improved means for producing low frequency pulsating current from an alternating current supply - Google Patents

Improved means for producing low frequency pulsating current from an alternating current supply

Info

Publication number
GB558931A
GB558931A GB1518042A GB1518042A GB558931A GB 558931 A GB558931 A GB 558931A GB 1518042 A GB1518042 A GB 1518042A GB 1518042 A GB1518042 A GB 1518042A GB 558931 A GB558931 A GB 558931A
Authority
GB
United Kingdom
Prior art keywords
condenser
load
valves
timing unit
supply
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
GB1518042A
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.)
TYLER CO WS
WS Tyler Inc
Original Assignee
TYLER CO WS
WS Tyler 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 TYLER CO WS, WS Tyler Inc filed Critical TYLER CO WS
Priority to GB1518042A priority Critical patent/GB558931A/en
Publication of GB558931A publication Critical patent/GB558931A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/005—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases using discharge tubes

Abstract

558,931. Frequency changing. ARNOLD, J. C. (Tyler Co., W. S.). Oct. 29, 1942, No. 15180. [Class 38 (ii)] [Also in Group XL] Means for energizing a load L such as the operating coil of a vibrating screen with impulses of lower frequency than that of the A.C. supply A, B comprises a grid-controlled valve PT in series with the load the grid being energized so as to maintain the valve blocked for intervals including at least one cycle of positive voltage on the anode by potentials derived from a timing unit comprising a condenser C discharging through a resistance R4. The timing unit also comprises a valve CT the anode circuit of which is energized from the A.C. supply A, B through a transformer T5. Thus initially the valves P, T and CT conduct simultaneously, the latter operating to charge the condenser C through a transformer T2 and rectifier RT, whereupon both valves become blocked by the condenser voltage applied to their grids. They remain blocked for an interval determined by the magnitude of resistance R4 through which the condenser discharges and which may be varied to determine the frequency of the impulses applied to the load L. One such timing unit may control a number of valves PT controlling different load circuits.
GB1518042A 1942-10-29 1942-10-29 Improved means for producing low frequency pulsating current from an alternating current supply Expired GB558931A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1518042A GB558931A (en) 1942-10-29 1942-10-29 Improved means for producing low frequency pulsating current from an alternating current supply

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1518042A GB558931A (en) 1942-10-29 1942-10-29 Improved means for producing low frequency pulsating current from an alternating current supply

Publications (1)

Publication Number Publication Date
GB558931A true GB558931A (en) 1944-01-27

Family

ID=10054426

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1518042A Expired GB558931A (en) 1942-10-29 1942-10-29 Improved means for producing low frequency pulsating current from an alternating current supply

Country Status (1)

Country Link
GB (1) GB558931A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2166009A (en) * 1984-08-17 1986-04-23 Hayashibara Ken Frequency divider circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2166009A (en) * 1984-08-17 1986-04-23 Hayashibara Ken Frequency divider circuit

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