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Actor Marlon Brando has four patents, all named "Drumhead tensioning device and method."
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| Number | Title | Issue Date |
| 6373393 | Flame detection device and flame detection A fire detection device comprises a detection element to convert the infrared ray energy into the electric signal, a first extracting unit to extract the signal of a first prescribed frequency range including the flicker frequency of a fire from the outpu... | 04/16/2002 |
| 6329922 | Fire detector and noise de-influence method It is prevented that a malfunction occurs because of a noise. A smoke detection section samples as a smoke detection signal a signal digitized after being output from a light reception section when a light emission section glows, and updates a previous sm... | 12/11/2001 |
| 6313548 | Power switching device A power switching device includes a switching relay for supplying power to a main circuit by switching between power from a main power supply and power from a supplementary power supply, and a control unit for controlling the switching relay. The control ... | 11/06/2001 |
| 6249220 | Detected information display system in fire detecting system A detected information display system in a fire detecting system of the present invention which is equipped with detectors arranged in a warning area and a control panel and achieves a specified information display on a physical quantity detected by the d... | 06/19/2001 |
| 6073700 | Sprinkler head The present invention is to discharge the fire extinguishing water by accurately opening the valve, using a shape-memory alloy at a predetermined temperature in a fire. When a shape-memory alloy in a first heat sensitive operation part is heated to a pred... | 06/13/2000 |
| 6044912 | Sprinkler head A sprinkler head connected with a fire extinguishing piping maintains a valve body in a closed state so as to contain compressed fire extinguishing water filled in a fire extinguishing piping when there is no fire, but opens and operates the valve body so... | 04/04/2000 |
| 5859706 | Photoelectric smoke detector and disaster monitoring system using the photoelectric smoke detector A drive pulse for emitting and turning-off a light emitting element is output, the level difference or the level ratio between the light emission zero point detection signal from a light receiving element having received the light from the light emitting ... | 01/12/1999 |
| 5751216 | Projected beam-type smoke detector and receiving unit A projected beam-type smoke detector and receiving unit includes in its light receiver data output unit 118 for outputting serially status information and status signal output units 85, 86 for sending the status information to the receiving unit, and in i... | 05/12/1998 |
| 5670938 | Fire alarm device In a fire alarm device for detecting the physical quantities of substances arising from the outbreak of a fire and giving a fire alarm, membership functions showing the correlation between an arising quantities calculated by the detected physical quantiti... | 09/23/1997 |
| 5642099 | Light scattering type smoke detector A light scattering type smoke detector arranged such that even if the range in which light from an LED is emitted has a dispersion, a labyrinth member 90 in the light emitting range has no edge or only a predetermined labyrinth member exist therein. The l... | 06/24/1997 |
| 5612678 | Fire detector and device for detaching body thereof A fire detector consisting of a body and a base. An inner wall part is provided in a circumferential wall of the body in such a manner that the inner wall part can be cut away therefrom. Further, an engaging member abutting on the inner wall part is provi... | 03/18/1997 |
| 5584579 | Thermal detector A thermal detector in which an element unit has a heat sensor element such as a, thermistor, sealed into the terminal end portion thereof, for electrically detecting temperature change. A detector body integrates by plastic-forming a pair of fitting membe... | 12/17/1996 |
| 5576697 | Fire alarm system A fire alarm system comprises a first light emitting device (11), a first polarizing filter (31), a first light receiving device (21), a second light emitting device (12), a second polarizing filter (32), and a second light receiving device (22). With the... | 11/19/1996 |
| 5487151 | Transmission error detection system for use in a disaster prevention monitoring system A transmission data synchronization system in a disaster prevention monitoring system comprises the steps of: connecting a plurality of terminal units to first and second transmission lines led out from a receiver; sending out access data in the form of a... | 01/23/1996 |
| 5477218 | Smoke detecting apparatus capable of detecting both smoke fine particles A light emitting device for projecting a light beam onto a monitor area, and a light receiving device, arranged so that a light beam is not directly received by the device, for receiving diffused light caused as a result of fine particles, such as dust, o... | 12/19/1995 |
| 5436614 | Thermal analog fire detector A thermal analog fire detector which is excellent in measurement precision and resolution in both the high and low temperature ranges and which has a wide range of measuring temperatures. A constant voltage E from a constant voltage circuit is supplied to... | 07/25/1995 |
| 5432805 | Method of detecting transmission error in disaster prevention supervisory system During data transmission between a receiver and each of terminal devices in a disaster prevention supervisory system, the receiver sends calling data including address data for specifying a specific terminal device to the side of terminal devices in a tra... | 07/11/1995 |
| 5430433 | Radio analog sensor A radio analog sensor for transmitting analog signals of a temperature or smoke density to a remote place by radio is used as each of sub devices 12-1 to 12-n. When a change of the analog detection signals of a temperature, a smoke density or the like, wh... | 07/04/1995 |
| 5425582 | Thermal detector and method of producing the same A thermal detector comprises: an element unit 11 having a heat sensor element 1 such as a thermistor sealed into the terminal end portion thereof, for electrically detecting temperature change; a detector body integrating by means of plastic-forming a pai... | 06/20/1995 |
| 5392990 | Firefighting double-nozzle deluge gun and control method thereof A double-nozzle deluge gun has a pair of nozzles arranged side by side rotatably on a rotatable table and an inter-nozzle control unit for adjusting the inter-nozzle angle measured between two lines obtained by projecting the radiation center lines of the... | 02/28/1995 |
| 5389914 | Anti-disaster monitoring system and anti-disaster monitoring method An anti-disaster system for receiving terminal data in response to the sequential calling of the terminals which is achieved by designating addresses from a receiver and for performing alarming or the like. Each of the terminals has an interrupt transmiss... | 02/14/1995 |
| 5327119 | Ionizing smoke sensor The present invention relates to an improvement of an ionizing smoke sensor having one radiation source and a two chambered structure consisting of an internal ionization chamber housing an internal electrode having a radiation source and defined by an in... | 07/05/1994 |
| 5289275 | Surveillance monitor system using image processing for monitoring fires and thefts By using the ratio of the G component to the R component G/R, or the ratio of the B component to the R component B/R, from a television monitor image, and referring to a conversion table for converting to distribution temperature, a surface temperature of... | 02/22/1994 |
| 5280272 | Fire alarm system which distinguishes between different types of smoke A fire alarm system which radiates light towards a smoke detecting space. Scattered light resulting from smoke that may exist in the smoke detecting space is judged by a receiver with respect to the type of smoke that may prevail in the space. The presenc... | 01/18/1994 |
| 5260687 | Combined method of determining fires First sensors measure physical quantities correlated with the heat release value of a fire source, and second sensors measure physical quantities correlated with the amount of the product of burning. At least a pair of one first sensor and one second sens... | 11/09/1993 |
| 5254975 | Compensation type heat sensor A pair of temperature detection devices having different heat time constants and an active device having a predetermined bias are connected in series. The bias is set so as to cause the active device to operate in a saturated region if the temperature is ... | 10/19/1993 |
| 5227763 | Anti-disaster monitoring system Disclosed is an anti-disaster system in which terminals are called by the polling system and in which the response signals from the terminals are received and decoded by a receiver to issue an alarming. Each of the terminals has an interrupt transmission ... | 07/13/1993 |
| 5160916 | Ionization type smoke sensor An ionization-type smoke sensor having a 2-chamber 1-radiation source structure including an inner electrode having a radiation source, an intermediate electrode having an opening through which radiation from the radiation source passes, an outer electrod... | 11/03/1992 |
| 5148148 | Radio alarm system A radio alarm system for detecting abnormalities such as a fire having a central unit which is adapted to receive and decode the radio signal transmitted from each terminal device and to give an alarm and a plurality of terminal devices which is connected... | 09/15/1992 |
| 4897634 | Scattered-light smoke detector with a shielding structure of detector circuits A scattered-light smoke detector having an improved shield structure. A detector circuit is provided on a printed circuit board which is disposed at an upper portion of a smoke detecting section. The smoke detecting section includes a planar base and a su... | 01/30/1990 |
| 4851819 | Photoelectric smoke detector with permanently fixed insect net A photoelectric smoke detector of this invention comprises a smoke-detection arrangement including a light emitting element and a photodetecting element and a smoke-detecting unit on which said smoke-detection arrangement is mounted. The smoke-detecting u... | 07/25/1989 |
| 4821805 | Automatic fire extinguishing system An automatic fire extinguishing system wherein at least two fire detecting sensors are provided. The sensors are disposed at a distance from each other and movable in the horizontal and vertical directions to scan the region to be protected for detecting ... | 04/18/1989 |
| 4800285 | Flame detecting arrangement for detecting a flame through horizontal and vertical scanning of a supervisory region by using a photodetector A flame detecting apparatus and a flame detecting method which utilizes a flame detector having a directivity and provided with a photodetector such as a photodiode or a phototransistor which produces a photo-output in response to the intensity of light i... | 01/24/1989 |
| 4785283 | Detecting system and detector A detecting system and a detector which includes an analog sensor for sensing a change in a quantity of an environmental phenomenon, processes a signal corresponding to a detection level output from said analog sensor to detect a change in the environment... | 11/15/1988 |
| 4706760 | Fire extinguishing condition monitoring apparatus for automatic fire extinguishing equipment Apparatus for monitoring the fire extinguishing condition of automatic fire extinguishing equipment which is adapted to detect flames and spray a fire extinguisher liquid from a nozzle to extinguish a fire. The apparatus comprises a detector for generatin... | 11/17/1987 |
| 4675661 | Light-attenuation type fire detector assembly A light-attenuation type fire detector assembly of the present invention comprises a light emission drive section including a light emitter for radiating light having an intensity corresponding to an input signal level; a smoke detecting section including... | 06/23/1987 |
| 4555695 | Fire alarm system A fire alarm system having a plurality of fire detectors connected in parallel with each other to a pair of power/signal lines leading to a central signal station and adapted to respond to the signal station with a detection signal in the mode of current ... | 11/26/1985 |
| 4491830 | Fire alarm system A plurality of fire detectors for detecting a physical change caused by fire and a central signal station for receiving a fire signal from the fire detectors to raise an alarm are connected to each other through optical fiber cables. The central signal st... | 01/01/1985 |
| 4481506 | Photoelectric smoke sensor A photoelectric smoke sensor wherein a photo diode having a junction capacitance of 100 pH or less is employed and a resistor having a high resistance value of the order of mega-ohms is connected in series with the photo diode to obtain a photo output thr... | 11/06/1984 |
| 4369435 | Fire detector and fire alarm system having circuitry to detect removal of one or more detectors at a signal station A fire detector and a fire alarm system wherein a plurality of fire detectors are connected across a pair of lines leading to a signal station and which is capable of detecting, at the signal station, removal of a detector head or heads from an associated... | 01/18/1983 |
