JPS57199326A - Time switch - Google Patents

Time switch

Info

Publication number
JPS57199326A
JPS57199326A JP8515281A JP8515281A JPS57199326A JP S57199326 A JPS57199326 A JP S57199326A JP 8515281 A JP8515281 A JP 8515281A JP 8515281 A JP8515281 A JP 8515281A JP S57199326 A JPS57199326 A JP S57199326A
Authority
JP
Japan
Prior art keywords
winding
transformer
current flows
timer
load current
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.)
Pending
Application number
JP8515281A
Other languages
Japanese (ja)
Inventor
Hideki Abe
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works 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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP8515281A priority Critical patent/JPS57199326A/en
Publication of JPS57199326A publication Critical patent/JPS57199326A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/28—Modifications for introducing a time delay before switching

Landscapes

  • Electronic Switches (AREA)

Abstract

PURPOSE:To provide the timer function to a switch, by making induced voltages of secondary windings almost equal, when a rated load current flows to the primary winding of a transformer and a minute load current flows through an impedance element and the secondary winding of the transformer. CONSTITUTION:A power supply terminal of a timer 9 is connected in parallel with a secondary winding 5b of a transformer 5 having a low impedance primary winding 5a, and a commercial power supply 2 is applied to a winding 5a of the transformer 5 via a contact 11a of a timer switching contact 11 of a timer 9 and a load 1. The power supply 2 is applied to the winding 5b of the transformer 5 via a series circuit of an impedance element 6 and another contact 11b of the contact 11 and the load 1. In this case, the winding ratio of the transformer 5 and the value of the element 6 are set so that the induced voltages in the winding 5b when the rated load current flows through the winding 5a of the transformer 5 becomes almost equal to those when a minute load current flows through the element 6 and the winding 5b of the transformer 5.
JP8515281A 1981-06-02 1981-06-02 Time switch Pending JPS57199326A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8515281A JPS57199326A (en) 1981-06-02 1981-06-02 Time switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8515281A JPS57199326A (en) 1981-06-02 1981-06-02 Time switch

Publications (1)

Publication Number Publication Date
JPS57199326A true JPS57199326A (en) 1982-12-07

Family

ID=13850688

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8515281A Pending JPS57199326A (en) 1981-06-02 1981-06-02 Time switch

Country Status (1)

Country Link
JP (1) JPS57199326A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4530580A (en) * 1983-01-18 1985-07-23 Hiroshi Ueda Telescopic extender for supporting compact camera

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4530580A (en) * 1983-01-18 1985-07-23 Hiroshi Ueda Telescopic extender for supporting compact camera

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