Abstract: The invention relates to a crime deterrent system in which passive pursuit of a randomly moving subject involved in a crime is monitored by a central control station having input as to the exact location and direction of movement of the subject from at least one of a plurality of persons in the area provided with a radio transmitter tunable only to the central control station. Such a radio transmitter is used in conjunction with a radio receiver tunable to any one of the AM or FM audio frequencies available in the area for receiving an alerting signal related to the crime and to a selected FM audio frequency for receiving descriptive information as to the subject.

Abstract: The invention relates to a device which is utilized to identify an assailant. The device comprises a member simulating an artificial nail or an artificial nail having at least one sharp prong associated therewith for penetrating or scratching the skin of the assailant when sufficient pressure is applied thereto by the finger. A substance in dry, liquid or dehydrated form that is capable of identifying the assailant or providing an itching or burning sensation is carried by the prong. When pressure is applied to the device by the finger on which the device is mounted and is sufficient to pierce or scratch any exposed skin area of the assailant, the substance is then introduced into the blood stream of the assailant, thereby effectively thwarting the action of the assailant.

Abstract: The invention relates to a pin-hole type camera in which the camera casing is divided into a plurality of light-tight sections, each of which is provided with a pin-hole, a shutter mechanism, a shutter release and flash means for exposing in random order adjacent areas of a single strip of light-sensitive material arranged in relation to the plurality of sections and the pin-hole associated with the respective section.