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Class Information
Number: 327/455
Name: Miscellaneous active electrical nonlinear devices, circuits, and systems > Gating (i.e., switching input to output) > Utilizing three or more electrode solid-state device > Four or more layer device (e.g., thyristor, etc.) > Ac supply > Silicon controlled rectifier (scr) > Triac
Description: Subject matter including a bidirectional rectifier (essentially two SCRs in parallel) that functions as an electronically controlled switch for AC loads and having an npnpn structure that can be triggered into either forward or reverse conduction (i.e., transmits AC power across its anode-cathode) by a pulse applied to its gate electrode.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7259407 |
Isolated HF-control SCR switch |
Aug. 21, 2007 |
| 7038503 |
Driving circuit for electrical nailing gun |
May. 2, 2006 |
| 6590349 |
Bidirectional flip-flop |
Jul. 8, 2003 |
| 6480056 |
Network of triacs with gates referenced with respect to a common opposite face electrode |
Nov. 12, 2002 |
| 6466064 |
Frequency multiplier device and frequency multiplier circuit |
Oct. 15, 2002 |
| 6373319 |
Bistable high-voltage bidirectional switch |
Apr. 16, 2002 |
| 5686857 |
Zero-crossing triac and method |
Nov. 11, 1997 |
| 5391997 |
Optically isolated N-channel MOSFET driver |
Feb. 21, 1995 |
| 5338991 |
High power solid state relay with input presence and polarity indication |
Aug. 16, 1994 |
| 5323062 |
System for triac trigger control in combination with a sensing element |
Jun. 21, 1994 |
| 5216303 |
Double solid state relay |
Jun. 1, 1993 |
| 5036234 |
Control circuit for triacs |
Jul. 30, 1991 |
| 4991049 |
Anti-short-cycle circuit |
Feb. 5, 1991 |
| 4803418 |
In-line electrical switch for AC power supply |
Feb. 7, 1989 |
| 4719446 |
Remote control for combined ceiling fan and light fixture |
Jan. 12, 1988 |
| 4678985 |
Two-terminal line-powered control circuit |
Jul. 7, 1987 |
| 4659941 |
Power sensing device |
Apr. 21, 1987 |
| 4658129 |
Photoelectric control device which detects changes in light intensity |
Apr. 14, 1987 |
| 4609865 |
Grounding system test apparatus |
Sep. 2, 1986 |
| 4504778 |
Self-powered, self-regulated, electronic ac control system |
Mar. 12, 1985 |
| 4471372 |
FET Controlled Triac |
Sep. 11, 1984 |
| 4464582 |
Water-safe hair dryer circuit |
Aug. 7, 1984 |
| 4453123 |
System for providing a firing signal to an electrical power switch |
Jun. 5, 1984 |
| 4443712 |
Switch device for connecting AC power source to load |
Apr. 17, 1984 |
| 4412140 |
Circuit for reducing current to light emitting diode of optically coupled driver |
Oct. 25, 1983 |
| 4394957 |
Sensor control device |
Jul. 26, 1983 |
| 4382192 |
Self-quenching circuit |
May. 3, 1983 |
| 4380114 |
Method of making a semiconductor switching device |
Apr. 19, 1983 |
| 4376253 |
Timed switch for an AC load |
Mar. 8, 1983 |
| 4369354 |
Arrangement for monitoring the operation of a heating element |
Jan. 18, 1983 |
| 4366678 |
Temperature control apparatus for refrigerating machine |
Jan. 4, 1983 |
| 4360743 |
Solid state control device for gradually turning on and off an electrical load |
Nov. 23, 1982 |
| 4360740 |
Low voltage switching circuit for controlling a high voltage electrical load |
Nov. 23, 1982 |
| 4355242 |
Voltage regulating system |
Oct. 19, 1982 |
| 4355343 |
Semiconductor switch failure control circuit |
Oct. 19, 1982 |
| 4338546 |
Liquid level detection circuit for control of liquid level responsive device |
Jul. 6, 1982 |
| 4265394 |
Flue damper control system |
May. 5, 1981 |
| 4239986 |
Power control arrangement and control circuit especially suitable for use therewith |
Dec. 16, 1980 |
| 4238689 |
Vacuum cleaner control system |
Dec. 9, 1980 |
| 4222087 |
Passive triac output asymmetry detector |
Sep. 9, 1980 |
| 4193269 |
Apparatus for supplying a cooling liquid to a condenser of a refrigeration unit |
Mar. 18, 1980 |
| 4191875 |
Fan speed control used in induction cooking apparatus |
Mar. 4, 1980 |
| 4181921 |
Harmonic distortion attenuator |
Jan. 1, 1980 |
| 4107472 |
Semiconductor channel switch |
Aug. 15, 1978 |
| 4090107 |
Electric circuit control system using logic device |
May. 16, 1978 |
| 4087697 |
Rapid power transfer system |
May. 2, 1978 |
| 4079267 |
Modular IC on-delay timer |
Mar. 14, 1978 |
| 4071028 |
Radio frequency cautery instrument and control unit therefor |
Jan. 31, 1978 |
| 4065227 |
Control circuit |
Dec. 27, 1977 |
| 4064404 |
Accessory for a garage door opener |
Dec. 20, 1977 |
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