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| Number | Title | Issue Date |
| 4024928 | Fire escape installation A fire escape unit for installation in buildings such as hospitals includes a hinged platform upon which a movable load such as a bed to be evacuated in an emergency is mounted. The hinged end of the platform is adjacent a hinged portion of an external wa... | 05/24/1977 |
| 4005754 | Process for the automatic reporting and extinguishing of fires A process for the automatic reporting and extinguishing of fires and an automatic fire reporting and extinguishing system capable of performing such process are provided. The process uses at least two different types of fire reporting devices and requires... | 02/01/1977 |
| 4004288 | Battery operated fire detection unit A battery operated fire detection unit that is capable of independent monitoring through sensing of smoke with the unit maintaining monitoring capabilities over long periods of time. A smoke detector senses the presence of smoke indicative of a fire and, ... | 01/18/1977 |
| 3978476 | Circuit conduction test arrangement for emergency alarm systems Circuit conduction test arrangement for emergency alarm systems having a receiving panel for a group of several sections to be supervised and including common alarm means, and a plurality of relay panels installed in the respective sections; comprising in... | 08/31/1976 |
| 3968483 | Burglar and fire alarm system A security alarm system for a building includes rechargeable battery-operated alarm circuitry, with the system including a burglar alarm in conjunction with an entrance door. Inside switches selectively activate the system and operate an electric motor to... | 07/06/1976 |
| 3952808 | Fire protection systems A protection system for use in the detection of smoke etc. from one or more of a plurality of locations and the subsequent release of an extinguishant into these locations comprising a control unit including pump, sensing equipment and extinguishant in fl... | 04/27/1976 |
| 3950739 | Detector for detecting and locating the source of a contaminating gas or smoke in the atmosphere The invention involves an apparatus and method. It has for a purpose the detection of a contaminating gas or smoke in the free and unconfined atmosphere and for locating the source of the contamination. A specific use is to detect leaks in systems contain... | 04/13/1976 |
| 3938115 | Combination smoke and heat detector alarm A combination smoke and heat detector alarm including a self contained stored energy source in the form of a cylinder of compressed gas. A T-fitting connects to the cylinder and feeds separate conduit systems leading to individual sounding devices. A fusi... | 02/10/1976 |
| 3935466 | Smoke detector adapted to a smoke sensing apparatus A smoke detector is disclosed which comprises an inner electrode, an intermediate electrode with a hole for passing radioactive rays therethrough, an outer electrode having openings for allowing smoke to flow therethrough, and one radioactive source, the ... | 01/27/1976 |
| 3932850 | Warning device An improved warning device having means for sensing or detecting a predetermined danger or phenomenon has a compensation circuit for the sensing means, including compensating means connected to the sensing means, amplifier means connected to the junction ... | 01/13/1976 |
| 3931462 | Stack plume visualization system This invention is method and apparatus for measuring, at a remote location, the concentration and velocity of SO.sub.2 in plume from a smokestack. An ultraviolet video system views the plume against the background sky at wavelengths where SO.sub.2 molecul... | 01/06/1976 |
