Alarm device for detaining user
US4099169A · kind A · utility
Inventor
Key dates
| Filing date | Jul 8, 1974 |
| Grant date | Jul 4, 1978 |
| Priority date | — |
| Expiry date | Jul 8, 1994 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B25/12
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Provided is an alarm box in which the user is temporarily detained during the operation of the box. A handle switch is provided which, upon manual grasping causes the sending of a tamper signal. The handle is located on an alarm box housing. Cuffs are joined respectively to the alarm box housing (below the handle) and to a cover. The cover is pivotally joined to the housing for closing the cuffs upon the arm of the user. Within the cuffs are pressure sensitive switches that form a part of an electrical circuit. The closing of the handle switch and the cuff switch initiates the operation of a timing control. The timing control, in turn, activates a solenoid. A portion of the cover extends and is movable within the housing. That portion of the cover has a tear-shaped aperture which is engaged by the solenoid. The aperture is so disposed as to permit the inward (or toward the housing) movement of the cover but the combination with the solenoid's plunger, resist the removal of the cover. In this way, the user is held by the cuffs for a predetermined time. A local bell may be provided to indicate that the alarm box is properly operating. The closing of the buff switches and initiation o…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.