초록 ▼

An alarm system incorporates a three-position wall switch which replaces a conventional two position switch, connected in circuit with a conventional exterior light fixture. The conventional light bulb in the exterior fixture is replaced by an adapter to which is connected an alarm unit and which re

An alarm system incorporates a three-position wall switch which replaces a conventional two position switch, connected in circuit with a conventional exterior light fixture. The conventional light bulb in the exterior fixture is replaced by an adapter to which is connected an alarm unit and which receives the exterior light bulb. The three-position switch operates the light bulb at one half normal intensity in its normal mode and in its alarm position illuminates the bulb at its rated intensity and at the same time activates the alarm unit. The alarm may include a strobe light and horn for providing a visual and audible alarm. The alarm unit fits within the exterior light fixture and may include an auxiliary switch to allow it to be enabled or disabled as desired, while allowing the light bulb to provide two levels of brightness.

대표청구항 ▼

An alarm apparatus for a conventional switch-operated lighting fixture, comprising: a lighting fixture having a first lamp socket; a switchbox for controlling a first lamp in said lighting fixture first lamp socket; a three-position switch in said switchbox, said switch including a switch arm having

An alarm apparatus for a conventional switch-operated lighting fixture, comprising: a lighting fixture having a first lamp socket; a switchbox for controlling a first lamp in said lighting fixture first lamp socket; a three-position switch in said switchbox, said switch including a switch arm having first, second and third positions; wherein said three position switch includes a switch arm terminal and first, second and third terminals; an input power cable having a lead connected to said three position switch at said third terminal; an output cable having a lead connected between said switch arm terminal and said first lamp socket, said switch arm selectively connecting said input power cable lead to said output cable lead; an alarm unit mounted in said lighting fixture and connected to said output cable; wherein said first, second, and third switch positions comprise “on”, “off”, and “alarm”positions, respectively, said three position switch further including first diode means connected between said input power cable lead and said output cable lead when said three position switch is in said first, “on”position, whereby a lamp secured in said first lamp socket will operate at a first intensity level; wherein said alarm unit includes second diode means to prevent said alarm from operating when said switch is in said “on”position; and wherein said input power cable lead is connected directly to said output cable lead, by-passing said first diode means, when said three position switch is in said third, “alarm”position, whereby said lamp will operate at a second intensity level, which is greater than said first intensity level, and said alarm unit will be energized.