Electronic time switch

Patent 4523103 Issued on June 11, 1985. Estimated Expiration Date:

August 9, 2003. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Electronic monitoring system including contactless motion detector
Patent #: 3932803
Issued on: 01/13/1976
Inventor: Buck

Adjustable time delay relay
Patent #: 4204128
Issued on: 05/20/1980
Inventor: Kruper

Equipment protector and energy saving apparatus
Patent #: 4415943
Issued on: 11/15/1983
Inventor: Wortman

Load-control system with two-conductor supply circuit Patent #: 4420693
Issued on: 12/13/1983
Inventor: Becker , et al.

Inventor

Zirkl, Siegmar

Assignee

Siemens Aktiengesellschaft

Application

No. 06/522036 filed on 08/09/1983

US Classes:

307/141, With time delay or retardation means327/399, With field-effect device327/402Including negative resistance device in delay circuit (e.g., unijunction transistor, etc.)

Examiners

Primary: Pellinen, A. D.
Assistant: Jennings, Derek S.

Attorney, Agent or Firm

Scully, Scott, Murphy and Presser

International Classes

B60L 11/00 (20060101)
H03K 17/28 (20060101)
H03K 17/292 (20060101)

Foreign Application Priority Data

1982-08-17 DE

Abstract

An electronic time switch for the time-limited actuation of appliances which are supplied with alternating current, whose load component is actuated by an electronic control element, and which includes terminals which supply the load component as well as the control element. A first storage element is charged during the inoperative condition through a rectifier, wherein the first storage element charges a second storage element upon initiation of load operation through the intermediary of a pushbutton with switching functions, through a recharging branch having a current limiting resistor. The recharging branch consists of a parallel circuit including an ohmic resistor and a threshold rectifier.