Abstract:
Emergency light devices, systems and methods that provide instant light in a power outage or other situations. One or more sensors monitor the flow of electricity, and when the flow of electricity is stopped or no longer present, an emergency light device power monitoring device instantly communicates via wireless communication technology to emergency light device(s) to instantly turn on the emergency light device(s). The emergency light device(s) can be a portable and/or permanent unit of varying shapes and sizes, and can be attached to any object, or may stand alone, with some or all of its parts being replaceable, interchangeable, or upgradeable.
Abstract:
A device includes a connection receiving power from a power source under normal conditions and circuitry configured to determine, based on an input from the connection, when the power from the power source is absent; output, when the power source is absent, a test signal at the connection; and generate a detection signal based on current flow generated following the output of the test signal, wherein the detection signal indicates a position of a switch connecting the circuitry to the connection and the generated detection signal indicates the switch is closed when the current flow is above a threshold. The circuitry is configured such that when the power from the power source is absent, the switch is closed, and plural devices are connected on the supply side of the switch, the plurality of devices on the supply side appear as a substantially open circuit to the test signal.
Abstract:
A system may include a switch arranged to control a lighting load, a processor arranged to control the switch, and a failsafe circuit arranged to monitor the processor and actuate the switch if the processor fails. The failsafe circuit may have a time constant, and may be arranged to actuate the switch if the monitor signal does not include a pulse during a period of time equal to the time constant.
Abstract:
A fail-safe lighting apparatus, in particular for street lighting, and its use. The use of a sensor to determine the failure of a component in a lighting assembly. A method whereby a signal transmitted to a remote computer is monitored and maintenance of a lighting apparatus is conducted only when the signal indicates failure of a component. In the illustrated embodiment, a lighting apparatus (1) comprises a first lamp assembly (2) with a first lamp (4) and a reflector (5), and a second lamp assembly (3) with a second lamp (7) and a reflector (8). A spring (10) urges the second lamp assembly (3) into a lighting position. In use, the first lamp assembly (2) is positioned in a lighting position by the use of a solenoid (6). When the first lamp (4) fails, the solenoid is activated allowing the first (2) and second (3) lamp assemblies to rotate about the fulcrum (9), thus displacing the first lamp assembly (2) and moving the second lamp assembly (3) into a lighting position.
Abstract:
Many buildings incorporate secondary lighting systems that can be employed to provide a low but sufficient level of light in, say, an emergency, or where a bright light might be inappropriate. The invention proposes a novel form of secondary light (15) that is in use connected to (possibly physically connected as well as electrically connected) and powered from an ordinary (primary) light (101, 102) - either the light's mounting (as a ceiling rose or a table lamp), the light-bulb socket (101), or the light bulb itself. Furthermore, the invention suggests such a light-connected/powered safety light that is switched from the very switch that operates the ordinary light to which the safety light is connected and from which it is powered. Not only will such a safety light shed its light exactly where it is required, and from a sufficiently high vantage point that it is likely to shine to the furthest extent of the relevant area without being blocked by other objects in that area, but it can most advantageously be switched on or off exactly as the main light itself is switched off or on.
Abstract:
A lighting control apparatus comprising : a primary input power connection (33) for connection to a primary power supply; a secondary input power connection (34) for receiving secondary power from a secondary power supply (such as a battery); and electronic circuitry (19) arranged to control power delivery to one or more lighting devices; wherein the electronic circuitry comprises sensing circuitry (37) configured to sense an external impedance coupled, in use, to the primary input power connection and wherein the sensing circuitry is arranged to apply measurement pulses to the primary input power connection to obtain an impedance measure of the external impedance.
Abstract:
In order to develop a driver circuit (2) of, and a method for supplying voltage/current to, at least one of at least two optical transmission elements (8-1, 8-2, 8-3) which are intended to transmit at least one optical signal, in particular light, for the purpose of transmitting data, in particular at least two electrooptical transducers, for example at least two light-emitting diodes or at least two lasers, for instance at least two semiconductor lasers, in such a manner that the reliability of the optical transmission element (8-1, 8-2, 8-3) and/or the electrooptical interface module is significantly increased, it is proposed that, in particular in the event of the active optical transmission element (8-1, 8-2, 8-3) failing, at least one control unit (18) which is assigned to at least one driver circuit (2) be used to change over between the at least two outputs (19, 20, 21), which are designed to connect the optical transmission elements (8-1, 8-2, 8-3), in such a manner that an optical transmission element (8-1, 8-2, 8-3) is respectively in the activated state.
Abstract translation:的驱动电路(2)和电压/电流的用于发送的至少一个光信号,特别是光的,用于发送由光传输元件(8-1,8-2提供数据的目的提供的至少两个中的至少一个的方法,8- 3),特别是至少两个电光转换器,例如从至少两个发光二极管或发光二极管(的= L [飞行] E [mitting] d [IODE] S)或至少两个激光器,如至少两个半导体激光器的,所以 细化,使得光学发射元件(8-1,8-2,8-3)和/或电 - 光接口模块以显著方式增加的可靠性,所以建议,(特别是在有源光传输部件8-故障的情况下 1,8-2,8-3)通过用于连接光传输元件(8-1,8-2的至少两个之间与所述控制单元(18相关联的至少一个的至少一个驱动器电路(2)的装置),8-3)AU 有符号输出(19,20,21)被切换,使得在每种情况下光发送元件(8-1,8-2,8-3)处于激活状态。
Abstract:
A highway light with an automatic backup lighting system includes a voltage supply, a switching mechanism electrically connected with the voltage supply, a current sensing device electrically connected with the voltage supply and the switching mechanism, a primary lamp electrically connected with the current sensing device and the voltage supply, and a secondary lamp electrically connected with the switching mechanism, wherein the current sensing device activates the switching mechanism to direct voltage to the secondary lamp when the current sensing mechanism senses low amperage from its connection with the primary lamp.
Abstract:
An auxiliary lighting control circuit for a lighting system having a HID lamp (16) as the primary light source and an auxiliary light source (30) for providing light when the HID lamp is extinguished or below full brightness but power remains available to the circuit. The circuit senses the HID lamp current and activates a relay (26) a conductive state using a solid state controller (24) when the HID lamp current is below a predetermined value to effect the lighting of the auxiliary light source.