A strip (12) provides a plurality of alarm stations (16, 20) each associated with an article sensor (24) such as a microswitch. Each station (16, 20) functions independently of the others to activate a remote alarm unit (18) and has its own indicator light (50), to indicate which alarm station (16, 20) has been triggered. Resetting by a shorting plug at the alarm station (16, 20) illuminates a resetting indicator light (53) and the sensor (24) is then resettable during a short time period for wh...

An alarm system includes alarm monitoring subsystems coupled by communication links to a central alarm processing subsystem. Each alarm processing subsystem includes sensor strings for detecting alarm conditions in a monitored region and means for locating a detected alarm condition along the length of a sensor string. An alarm message including a system identifier, a sensor string identifier and the distance of the alarm condition along the sensor string is communicated to the alarm processing ...

An alarm clock produces a wake-up sound by simulating an incoming telephone and causing the telephone to ring. The alarm clock has a timing device for generating an alarm signal at a programmable time instant and a circuit responsive to the alarm signal for sending a signal simulating a standard incoming telephone signal to the telephone through a standard interface of the telephone.

An improved alarm system having a first electrode carried by at least one of the locking elements and a second electrode carried by the locking surface normally engageable by the locking elements when the locking mechanism is in its locked configuration, and an alarm system including an alarm signal generator and a plurality of event detection sensors, one of which is formed by the first and second locking elements, the sensors being coupled to the signal generator such that an event detected by...

A radio-controlled timepiece includes a clock face, a hands assembly mounted for rotation about an axis in front of the clock face, and an alarm setting mechanism. The alarm setting mechanism comprises a minute setting disk which is driven by an hour setting disk. A manually rotatable transparent support disk is mounted in front of the clock face for rotation about the same axis as the hands assembly. The support disk carries a marker which, when the support member is rotated, is moved to indica...

An alarm system for an electronic apparatus with a slot comprises a radio transmitter unit and a radio receiver unit. The radio transmitter unit can be carried by a user, including an antenna for transmitting a radio code signal and a control switch for controlling power on/off of the radio receiver unit. The radio receiver includes a security switch controlled to turn on/off the radio receiver unit when inserting/removing from the slot of the electronic apparatus. The radio receiver unit automa...

An alarm chip (10) and the use of the alarm chip (10) for giving warning of burglary or undesired entry into buildings, installations or structures, preferably by so-called shell-protection of the building, installation or structure, the alarm chip (10) detecting, by means of an associated accelerometer, motions/vibrations in the object to which the alarm chip (10) is fixedly arranged, the object being formed of e.g. a window (2), a door, possibly a frame or casing connected to the window (2) or...

An alarm system for generating an alarm from a remote location and which utilizes electronically generated codes to access selected functional portions of the alarm system circuitry and which further utilizes a locking transmitter which must be reset after a single use thereof before the transmitter may be re-used, the transmitter resetting being achieved by means accessible only to authorized personnel. A method for providing personnel security utilizing a defined area grid to identify a locati...

Movement or removal of a display object placed on a base is detected by a switch mechanism for closing an electrical circuit, having an elongated plunger and a device for maintaining the throw length of the switch mechanism substantially constant and independent of the distance the plunger is depressed upon setting of the alarm. Detection of extremely short plunger travel is enabled without special adjustments in the plunger length. A "tilt" switch may be added for added sensitivity. A plurality...

The apparatus which predicts the onset of thunderstorm and the occurrence of close thunderbolts, includes a composite sensor with several metal pipes radially installed with equal separation on a hemispherical electrode. A plurality of corona needles are provided on the insulator at the end of each metal pipes, and the needles are electrically connected together within the composite sensor. The hemispherical electrode is connected to a circuit that counts the number of electric field-changes for...