Security screen

Details Security screen Security screen

1993-10-18

1995-09-19

Purol, David M.

Flexible or portable closure, partition, or panel

With signal, indicator, or sign

1602901, 340550, G08B 1308

Patent

active

054508886

ABSTRACT:
A security screen includes a rectangular frame including a top member containing a screen reel comprising a rotatable core with a length of electrically non-conductive screen material affixed thereto. The screen contains parallel electrical conductors therein running lengthwise, and transverse conductors interconnect selected pairs of the lengthwise conductors to form therewith a single continuous electrical path which is interrupted if the screen is cut. A latchable drawbar is affixed along the lower edge of the screen, so that the screen can be drawn closed, against the bias provided by two torsion springs. One end of each spring is connected to the reel's core; its other end is attached to a stationary stub shaft, which serves as a terminal for connection to an alarm. The springs are electrically joined to opposite ends of the screen's conductor path, thus serving as non-sliding rotary electrical joints.

REFERENCES:
patent: 18314 (1876-10-01), Cope
patent: 1093272 (1914-04-01), Jones
patent: 1140413 (1915-05-01), Stanley
patent: 1221564 (1917-04-01), Mills
patent: 1299016 (1919-04-01), Opitz
patent: 2055862 (1936-09-01), Friedman
patent: 2316027 (1943-04-01), Swormstedt
patent: 3696373 (1972-10-01), Dunn et al.
patent: 3871434 (1975-03-01), Hance
patent: 4006768 (1977-02-01), Horgan, Jr.
patent: 4160972 (1979-07-01), LaMell et al.
patent: 4170947 (1979-10-01), Morgan
patent: 4232310 (1980-11-01), Wilson
patent: 4267874 (1981-05-01), Pope
patent: 4272922 (1981-06-01), Prager
patent: 4545148 (1985-10-01), Shaw
patent: 4593492 (1986-06-01), Lumenello
patent: 4757852 (1988-07-01), Jentof et al.
patent: 4758824 (1988-07-01), Young
patent: 4796384 (1989-01-01), Warick
patent: 4878314 (1989-11-01), Blockinger
patent: 4971130 (1990-11-01), Bentley
patent: 4999608 (1991-03-01), Galomb
patent: 5049855 (1991-09-01), Slemon et al.
patent: 5056262 (1991-10-01), Schweiss et al.
patent: 5090468 (1992-02-01), Tedeschi
patent: 5274357 (1993-12-01), Riordan

Affiliated with

Also associated with

Rating

Security screen does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Security screen, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Security screen will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1822931