Abstract: The automatic telephone dialing apparatus or repertory telephone dialer system includes a microprocessor, a keyboard and control and routing circuits coupled to and between the keyboard, the microprocessor, an incoming telephone line, and a telephone unit. The keyboard has a plurality of pushbutton keys, each one of which, when depressed, causes the automatic dialing of a predetermined number. Pairs of names and numbers are stored within an internal memory of the microprocessor such that, by depressing keys representing the first few letters of a name, one may find, and cause automatic dialing of, a number corresponding to that name. The system also includes a timer, a redial timer, an alphanumeric display, and means for listing out the stored names on the display, and for searching through a series of names that have the same first several numbers or where the names have the same first several letters.

Abstract: The detector comprises a first electrode defined by a bolt mounted on an annular insulator which in turn is mounted on a printed circuit board and a second electrode defined by a cup shaped member which is aligned with the bolt and positioned with the interior thereof facing and being spaced from the bolt. A source of radiation is mounted on the head of the bolt and a third electrode is spaced outwardly from and laterally to one side of the head of the bolt. A box-shaped electrostatic shield is fixed to the printed circuit board and has an opening in which is positioned the cup shaped member. The shield serves to enclose the space between the rim of the cup shaped member and the printed circuit board. An annular insulator is mounted on and about the bolt.

Abstract: The alarm device includes a resilient metallic spring strap which is received over a doorknob and against the shank of the doorknob and which forms an input contact to the device. The device further includes an oscillator which outputs a signal through a coupling network having a capacitive branch to ground that includes a capacitive path extending through the strap to the doorknob. When a person touches the doorknob, a capacitive path to ground is established that causes increased attenuation of the signal level. A self-initializing and self-compensating amplifier in the device detects such drops in the signal level and triggers a pulsating alarm. The circuit needs no manual adjustment.

Abstract: The device includes a housing, a keyboard on the housing, and a loudspeaker and electric components within the housing. The housing is mounted on a door adjacent a magnet mounted on the door frame. The device includes an audio alarm circuit including a loudspeaker for generating an audio alarm, a control circuit coupled to the alarm circuit for controlling operation of the alarm circuit, and signal generating curcuitry including door motion sensing logic for sensing when the door has been opened and for generating an alarm signal which is applied to the control circuit for operating the alarm circuit. The device further includes a programmable alarm inhibiting circuit including the keyboard which comprises a plurality of keys and pushbutton switches operated by the keys. The alarm inhibiting circuit includes keyboard decoding logic. A code setting circuit includes three leads which are coupled to the keyboard decoding logic and which are releasably connected to one side of the pushbutton switches.