SECURITY SYSTEM

• US 3,619,629 A
• Filed: 04/30/1969
• Issued: 11/09/1971
• Est. Priority Date: 04/30/1969
• Status: Expired due to Term

• Current Assignee: David R. Matthews
• Original Assignee: David R. Matthews
• Inventors: Matthews, David R.
• Primary Examiner(s): Stolwein, Walter
• Application Number:
  US04/820,378
• Time in Patent Office: 923 Days
• Field of Search: 250/221,222,239,234 340/276,227,258
• US Class Current: 250/221
• CPC Class Codes: G08B 13/183 by interruption of a radiation beam or barrier

Abstract

An electrooptical intruder detection system including alignable emitting and detecting elements, such as semiconductor diodes. Each element is disposed in a holder member having a semispherical head portion which cooperates with a mounting plate and retainer member to provide the alignment function. In addition, the emitting element may be mounted in an adapter member which is axially adjustable relative to the holder member. Installation in an electrical outlet having various apertures for exposing the electrooptical element and permitting connection to external electrical devices is preferred.

Claims

1. In a security system of the type having a signal transmitter and a signal receiver alignable in signal transfer relation along a common line of sight;

a transmitter device comprising a holder member having a generally spherical and hollow head portion and a shank portion integral therewith, an electrically actuable radiant energy emitter in the head portion, a support plate having a socket therein to adjustably receive the head portion, and a retainer member engageable with the plate and the head portion to maintain the head portion in engagement with the socket to permit substantially universal adjustment of the holder to establish said line of sight, a lens disposed in the head portion such that radiant energy from the emitter passes therethrough, the plate including a pair of apparent plug prong apertures and an apparent ground prong aperture arranged to appear as an electrical wall outlet, said socket being contiguous with the ground prong apertures such that the line of sight extends therethrough.

2. Apparatus as defined in claim 1 including an adapter member axially adjustably disposed within the shank portion and carrying the emitter to permit adjustment in the spacing between the emitter and lens.

3. Apparatus as defined in claim 1 wherein the emitter is a diode.

4. In a security system;

a transmitter device for transmitting a radiant energy beam and a receiver device in the path of the beam for receiving the beam and indicating an interruption thereof, mounting means for at least one of the devices including a plate having first and second pairs of parallel apparent prong apertures and first and second apparent ground prong apertures therein to appear as an electrical wall outlet, said one device being adjustably supported by the plate such that the beam path extends through one of the ground prong apertures thereto.

5. Apparatus as defined in claim 4 wherein said one device is a receiver device, the combination further including signal processing means electrically connEcted to said receiving device for producing signals indicating the interruption of the beam directed thereto.

6. Apparatus as defined in claim 5 including a power supply having a double-prong plug for insertion in one of said first and second pairs of parallel prong apertures, and electrical connector means connecting said apertures to said one device.

7. Apparatus as defined in claim 6 including monitoring means and electrical connector means for connecting the monitor means through one of said first and second pairs of said parallel prong apertures to said signal processing means.

8. Apparatus as defined in claim 4 wherein said one device is a photoelectric device and means mounting said photoelectric device to said plate for permitting limited universal adjustment in the viewing direction thereof.

9. Apparatus as defined in claim 8 wherein said means for permitting universal adjustment includes a spherical shaped holder carrying said photoelectric device and means including a portion of said plate defining a socket for receiving said spherical holder.

10. Apparatus as defined in claim 9 wherein said holder includes a lens alignable with said ground prong aperture so as to lie in the beam path, and means for adjusting the axial distance between said photoelectric device and the lens for focusing purposes.