ABSTRACT OF THE DISCLOSURE To obtain a desired foam expansion ratio even after aspiration of smoke, provided is a high expansion foam fire-extinguishing system, which discharges foam using a foam solution that has a dynamic surface tension y of 25 mN/m or less, which is measured at a life time of 100 msec by a maxi...

Provided is a short-circuit isolator capable of earlier detection of recovery from short circuit of a disconnected line and reconnecting the line. The short-circuit isolator includes: a switch (SWB) for switching a connection state between a primary signal line and a secondary signal line; a short-circuit monito...

A cover (5) includes a first bent portion (5b) and a second bent portion (5c) which are provided in series to be continuous with a lid portion (5a). A casing (2) includes a hole (8) through which the cover is allowed to be inserted/removed and movably inserted into/removed from the casing, and includes a cover l...

Provided is a fire detector in which an element substrate can be easily removed from and mounted into an optical case. The fire detector includes: an optical case (21); an element substrate (31), on which a light-receiving element (12) is mounted, the element substrate (31) being provided in the optical case (21...

Provided is a smoke detector having a structure in which, at a time of performing smoke detection, an S/N ratio of a signal of a light receiving element is improved, to thereby accurately detect occurrence of fire. At both end portions of an inside of an optical case (21) having a substantially cylindrical shape, a ...

A smoke detector (1) includes: a light emitting section (6); a light receiving section (7); a smoke detecting section (12), the smoke detector (1) being configured to detect smoke or the like in a manner that the light receiving section (7) receives, via a light transmissive member (11), scattered light generate...

ABSTRACT OF THE DISCLOSURE In order to prevent foaming ratio from being degraded, there is provided a high expansion foam fire-extinguishing system (B) including: a foam generator body (1) formed to a tubular shape; a foam forming screen (2) arranged at a distal end (la) side of the foam generator body (1); an emis...

To enable an air velocity of sampling air to be precisely measured, a smoke detector (S) includes: a smoke detection part (22) connected to a sampling pipe (11); a fan (12) that sucks sampling air (SA) into the sampling pipe; and an air velocity sensor (15) that measures an air velocity of the sampling air within th...

ABSTRACT OF THE DISCLOSURE Provided is a combination smoke and heat detector which allows, in spite of a simple structure, light emitted from an indication lamp to be visually confirmed from a wide range of directions. A combination smoke and heat detector (100) includes a body base (10), a printed circuit board (1...

Provided is a smoke detecting apparatus capable of detecting occurrence of smoke at high sensitivity while suppressing an effect of disturbance. The smoke detecting apparatus for detecting occurrence of smoke by subjecting an image captured by a monitoring camera to image processing includes: an image memory (10) fo...

The present invention provides a high expansion foam fire-extinguishing system including: an emission nozzle (9) to which a foam solution (Wg) prepared by mixing water (W) with a foam concentrate (16) containing a surface active agent (18) is sent under pressure; a flow passage (2) ; and a foam screen (7) upon which...

Provided is an alarm device capable of performing transmission and reception reliably while suppressing an amount of current consumption. An alarm device (100) includes: a fire detection circuit (7); a control circuit (1); and a transmitting/receiving circuit (5). The transmitting/receiving circuit (5) transmits the...

Provided are an alarm system and an alarm device which are capable of enhancing a fail-safe function. A fire alarm device (A) operating as a master unit transmits a switching request signal to fire alarm devices operating as slave units at a predetermined timing, the switching request signal containing at least an o...

Provided is a smoke detector having a structure in which, at a time of performing smoke detection, an S/N ratio of a signal of a light receiving element is improved, to thereby accurately detect occurrence of fire. At both end portions of an inside of an optical case (21) having a substantially cylindrical shape, a ...

ABSTRACT OF THE DISCLOSURE Provided is an electric device which is free from causing troubles in opening/closing the cover even if the housing is distorted. The electric device includes: a case (3) having a substantially box shape and an opened end surface (3a); a cover (5) including a lid surface (5a) for covering...

In order to enable supply of a sampling air to a smoke detection portion at a stable flow velocity, the present invention provides a smoke detector including: a black box (21) including a smoke detection portion (25) having an inflow port and an outflow port; a sampling pipe (30) laid in a monitor space; a gas flow ...

Provided is a photoelectric smoke sensor capable of correcting a sensitivity according to a state of contamination. The photoelectric smoke sensor includes: a storage section (6) for storing a zero detection value VN and an initial zero detection value; a moving average value calculating section (51) for calculat...

Provided is an audible alarm device including a piezoelectric buzzer, which is capable of suppressing wasted current consumption not contributing to increased sound pressure of the piezoelectric buzzer. The audible alarm device includes: a piezoelectric buzzer (32); a coil (33) connected in parallel to the piezo...

Provided is a photoelectric smoke detector capable of preventing an erroneous alarm from being issued even when steam flows into a smoke detecting unit. The smoke detecting unit includes: an installation section; and a smoke inlet section. The installation section includes: a light emitting element for emitting ligh...

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Obtained is a fire alarm system transmitter having an improved insulating property without increasing an entire size of a casing. The fire alarm system transmitter includes: a printed circuit board with a substantially rectangular shape, on which a terminal block including a plurality of terminals aligned along ...

In order to detect whether a light-emitting element and a light-receiving element are functioning normally, there is a technology that uses reflected light, which is radiated light from a light-emitting element that has reflected inside an optical mount. This technology does not function normally when the reflected ...