EP0146809A2
Expired / Lapsed
EP
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A switching circuit
Assignee: Omron Corp
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Filing: 1984-11-28
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Granted: —
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Expires: 2004-11-28
Abstract
Abstract A switching circuit for supplying electric power to a load (L) from a power source (P) includes a first relay device (X, X1) having a first switch (X1) and a semiconductor switching element (T) connected in series with the first switch, power source and load. A second relay device (RY: Y, LED) is provided which is defined by a second switch (Y2: Ya) connected parallelly to the semiconductor switching element and an actuating switch (Y1: LED) for enabling and disabling the semiconductor switching element. The second relay device is so arranged as to effect the make of the actuating switch (Y1: LED) and second switch (Y2: Ya) in said order and to effect the break of the same in the opposite order. A delay circuit (C, R) is provided for controlling the first and second relay devices such that when supplying a current to the load, the first and second relay devices are turned on in said order so that the first switch (X1) the actuating switch (Y1: LED) and the second switch (Y2: Ya) are turned on in said order. And, when cutting off the current to the load, the first switch (X1), the actuating switch (Y1: LED) and the second switch (Y2: Ya) are turned off in the opposite order.
Inventors
- 👤 Hirofumi Koga
- 👤 Katsumi Koyanagi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 06:16
CPC Classifications
H; H01; H01H; H01H9/00; H01H9/54; H01H9/541; H01H9/542; H01H2009/545
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
138 words
A switching circuit for supplying electric power to a load (L) from a power source (P) comprising: a semiconductor switching element (T) connected in series with said power source and load; switch means (Y2: Ya) connected parallelly to said semiconductor switching element; actuating means (Yl: LED) for enabling and disabling said semiconductor switching element; and means (RY: C, R) for controlling said switch means (Y2: Ya) and actuating means (Yl: LED) such that: when supplying a current to said load, said actuating means (Yl: LED) is first operated to enable said semiconductor switching element, and then, said switch means (Y2: Ya) is turned on; and when cutting off the current to said load, said switch means (Y2: Ya) is turned off first, and then, said actuating means (Yl: LED) is operated to disable said semiconductor switching element (T).
Claim 2
Dependent Claim
138 words
A switching circuit for supplying electric power to a load (L) from a power source (P) comprising: a semiconductor switching element (T) connected in series with said power source and load; switch means (Y2: Ya) connected parallelly to said semiconductor switching element; actuating means (Yl: LED) for enabling and disabling said semiconductor switching element; and means (RY: C, R) for controlling said switch means (Y2: Ya) and actuating means (Yl: LED) such that: when supplying a current to said load, said actuating means (Yl: LED) is first operated to enable said semiconductor switching element, and then, said switch means (Y2: Ya) is turned on; and when cutting off the current to said load, said switch means (Y2: Ya) is turned off first, and then, said actuating means (Yl: LED) is operated to disable said semiconductor switching element (T).
Claim 3
Dependent Claim
172 words
A switching circuit for supplying electric power to a load (L) from a power source (P) comprising: first switch means (Xl); a semiconductor switching element (T) connected in series with said first switch means, power source and load; second switch means (Y2: Ya) connected parallelly to said semiconductor switching element; actuating means (Yl: LED) for enabling and disabling said semiconductor switching element; and means (RY, X: C, R, X) for controlling said first switch means (Xl), second switch means (Y2: Ya) and actuating means (Yl: LED) such that: when supplying a current to said load, said first switch means (Xl) is turned on first, then, said actuating means (Yl: LED) is operated to enable said semiconductor switching element, and thereafter, said second switch means (Y2: Ya) is turned on; and when cutting off the current to said load, said second switch means (Y2: Ya) is turned off first, then, said actuating means (Yl: LED) is operated to disable said semiconductor switching element, and thereafter, said first switch means (Xl) is turned off.
Claim 4
Dependent Claim
172 words
A switching circuit for supplying electric power to a load (L) from a power source (P) comprising: first switch means (Xl); a semiconductor switching element (T) connected in series with said first switch means, power source and load; second switch means (Y2: Ya) connected parallelly to said semiconductor switching element; actuating means (Yl: LED) for enabling and disabling said semiconductor switching element; and means (RY, X: C, R, X) for controlling said first switch means (Xl), second switch means (Y2: Ya) and actuating means (Yl: LED) such that: when supplying a current to said load, said first switch means (Xl) is turned on first, then, said actuating means (Yl: LED) is operated to enable said semiconductor switching element, and thereafter, said second switch means (Y2: Ya) is turned on; and when cutting off the current to said load, said second switch means (Y2: Ya) is turned off first, then, said actuating means (Yl: LED) is operated to disable said semiconductor switching element, and thereafter, said first switch means (Xl) is turned off.
Claim 5
Dependent Claim
250 words
A switching circuit for supplying electric power to a load (L) from a power source (P) comprising: first relay switch means (X, Xl) having first switch means (Xl); a semiconductor switching element (T) connected in series with said first switch means, power source and load; second relay switch means (RY: Y, LED) having second switch means (Y2: Ya) connected parallelly to said semiconductor switching element and actuating means (Yl: LED) for enabling and disabling said semiconductor switching element, said second relay switch means being so arranged as to effect the make of said actuating means (Yl: LED) and second switch means (Y2t Ya) in said order and to effect the break of the same in the opposite order; and delay circuit means (C, R) for controlling said first and second relay switch means such that: when supplying a current to said load, said first relay switch means (X, X1) is turned on, and then, said second relay switch means (R Y : Y, LED) is turned on so as to turn on said first switch means (Xl), said actuating means (Yl: LED) and said second switch means (Y2: Ya) in said order; and when cutting off the current to said load, said second relay switch means (RY: Y, LED) is turned off first, and then, said first relay switch means (X, Xl) is turned off so as to turn off said second switch means (Y2, Ya), said actuating means (Yl: LED), and said first switch means (Xl) in said order.
Claim 6
Dependent Claim
250 words
A switching circuit for supplying electric power to a load (L) from a power source (P) comprising: first relay switch means (X, Xl) having first switch means (Xl); a semiconductor switching element (T) connected in series with said first switch means, power source and load; second relay switch means (RY: Y, LED) having second switch means (Y2: Ya) connected parallelly to said semiconductor switching element and actuating means (Yl: LED) for enabling and disabling said semiconductor switching element, said second relay switch means being so arranged as to effect the make of said actuating means (Yl: LED) and second switch means (Y2t Ya) in said order and to effect the break of the same in the opposite order; and delay circuit means (C, R) for controlling said first and second relay switch means such that: when supplying a current to said load, said first relay switch means (X, X1) is turned on, and then, said second relay switch means (R Y : Y, LED) is turned on so as to turn on said first switch means (Xl), said actuating means (Yl: LED) and said second switch means (Y2: Ya) in said order; and when cutting off the current to said load, said second relay switch means (RY: Y, LED) is turned off first, and then, said first relay switch means (X, Xl) is turned off so as to turn off said second switch means (Y2, Ya), said actuating means (Yl: LED), and said first switch means (Xl) in said order.
Claim 7
Dependent Claim
15 words
The switching circuit of Claim 3, wherein said semiconductor switching element (T) is a triac.
Claim 8
Dependent Claim
20 words
The switching circuit of Claim 3, wherein said semiconductor switching element (T) is a light activated bidirectional light activated thyristor.
Claim 9
Dependent Claim
105 words
A relay device comprising: a base plate (10); a coil (2) mounted on said base plate (10); a movable arm (5) adapted to move between a first position when said coil is de-energized and a second position when said coil is excited; first, second and third contact means (7, 8, 9) mounted on said base plate to make said first and second contact means upon movement of said movable arm from said first position to a mid-position between first and second positions, and to make said first, second and third contact means upon movement of said movable arm from said mid-position to said second position.
Claim 10
Dependent Claim
105 words
A relay device comprising: a base plate (10); a coil (2) mounted on said base plate (10); a movable arm (5) adapted to move between a first position when said coil is de-energized and a second position when said coil is excited; first, second and third contact means (7, 8, 9) mounted on said base plate to make said first and second contact means upon movement of said movable arm from said first position to a mid-position between first and second positions, and to make said first, second and third contact means upon movement of said movable arm from said mid-position to said second position.
References Cited (Backward Citations)
No citation records indexed.
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