Window shade controls and method associated therewith

• US 4,173,721 A
• Filed: 03/17/1978
• Issued: 11/06/1979
• Est. Priority Date: 03/17/1978
• Status: Expired due to Term

• Current Assignee: Emma D. Louis
• Original Assignee: Emma D. Louis
• Inventors: Louis, Emma D.
• Primary Examiner(s): Hix, L. T.
• Assistant Examiner(s): Schreyer, S. D.
• Application Number:
  US05/887,639
• Time in Patent Office: 599 Days
• Field of Search: 307/141, 307/141.4, 200/61.84, 200/DIG. 12, 49/29, 49/30, 49/74, 160/1, 160/2, 160/7, 160/176
• US Class Current: 307/115
• CPC Class Codes: E06B 9/32 Operating, guiding, or securing devices therefor operation of tilting bars E06B9/307
• CPC Class Codes: E06B 9/70 comprising an electric motor positioned outside the roller
• CPC Class Codes: H01H 43/00 Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed

Abstract

A method and device according to which it becomes possible to operate a window shade automatically. Thus, by way of this method and device a window shade can be automatically closed during the night and automatically opened during the day. In this way it is possible to give to an unoccupied home an outside appearance tending to indicate that the occupants are at home.

Claims

1. A device for automatically controlling a window shade comprising:

a lever arm pivotally mounted for movement between a first and second position;

first solenoid means coupled to said lever arm for pivotting said lever arm to said first position in response to electrical activation by electrical timing means;

second solenoid means coupled to said lever arm for pivotting said lever arm to said second position in response to electrical activation by electrical timing means;

first switch means for deactivating said first solenoid means upon said lever arm pivotting to said first position;

second switch means for deactivating said second solenoid means upon said lever arm pivotting to said second position;

spring toggle means coupled to said lever arm for maintaining said lever arm in either of said first and second positions after deactivation of said first or second solenoid means respectively by said first or second switch means respectively;

electrical timing means electrically coupled to said first and second solenoid means to sequentially activate and deactivate the latter according to a predetermined timing sequence; and

a pair of elongated flexible members, each having one end connected to a respective end portion of said lever arm and another end adapted to be connected to one of a pair of strings of a Venetian blind, so that when said lever arm assumes said first position, one of the Venetian blind strings is pulled by one of the elongated flexible members and when said lever arm assumes the second position, the other of said Venetian blind strings are pulled by the other of the elongated flexible members.