摘要:
An improved lighting fixture of the type having a horizontally positioned unjacketed arc lamp in a two piece reflector having a front bowl-shaped reflector that issues a relatively narrow beam and a rear dish-shaped reflector positioned behind the arc tube that issues a wider beam spread. Although such a fixture inherently has some glare and spill control by exploiting the horizontal, transverse positioning of the arc tube across the reflector combination, the invention improves on glare and spill control from this fixture by re-orienting the rear reflector so that it is tipped slightly downward. The upper part of the beam from the rear reflector is therefore moved so that it does not cause glare or spill off of the target area, and also it increases efficiency of the fixture by placing more usable light on the target area. Optionally a visor can be used to further control glare and spill.
摘要:
An apparatus and method of lighting which produces light of highly controlled nature and which makes sufficient use of the light including a light source, a primary reflector placed directly at or near the light source and a secondary reflector which receives light from light source and from the primary reflector and directs it to a target area.
摘要:
A means and method for rigidly elevating a structure includes a base member securable in the ground and which has a portion extending above the ground. A pole section, having a bore inside a lower end, and an upper end, can be stacked upon the base means upwardly by slip fitting the pole section onto the base end and securing it in place. A flexible, easily transportable and durable system is thereby created for elevating structures.
摘要:
A glare control lamp and reflector assembly and method for glare control which includes a lamp and reflector for providing a controlled light beam to a target area. The reflector can be altered to alter the controlled light beam. Also, light controlling devices can be positioned on or in the reflector to control light.
摘要:
A glare control lamp and reflector assembly and method for glare control which includes a conventional lamp and symmetrical reflector for providing a controlled light beam to a target area. A reflector shield can be positioned on the reflector below the lamp and has the properties of diverging incident light downwardly towards the target area and thus controls reflection upwardly which would produce glare. A glare shield can be positioned on the top of the reflector and extends outwardly from the outer edge of the reflector to block both direct light and reflected light from traveling upwardly and outwardly which would produce glare. In a further combination, a lamp shield can be positioned over a portion of the outermost extending end of the lamp to prevent unreflected light from directly causing glare. The method for controlling glare includes the steps of providing a conventional lamp and reflector assembly, positioning a reflector shield in the bottom of the reflector beneath the bulb to coverge instant light downwardly to the target area, and providing a glare shield extending around and outwardly from the top of the reflector to block and divert incident light downwardly towards the target area. An additional step would be to provide a lamp shield over the outwardmost end of the lamp to block directly emanating light from causing glare.
摘要:
A means and method for increasing the amount, efficiency, and flexibility of use of light from an arc lamp. A first aspect of the inventnion includes an arc lamp in a lighting fixture wherein the arc tube positioned within the arc lamp has a longitudinal axis which is offset and/or tilted from the general longitudinal axis of the arc lamp. A second aspect of the invention involves methods and structures to position the arc tube of an arc lamp in a generally horizontal or vertical position irregardless of the aiming direction for the light from the arc lamp, and any related reflecting apparatus. The longitudinal axis of the arc tube can either be offset and/or tilted with respect to the longitudinal axis of the arc lamp, or they can be coaxial and the entire arc lamp can be positioned horizontally or vertically, offset and/or tilted from the aiming direction of the fixture and any attendant reflecting structure. A third aspect of the invention utilizes methods and structure to adjust the arc lamp to a desired rotational orientation with respect to a reflecting structure. A fourth aspect of the invention involves apparatus to allow desired mounting of the arc lamp to insure the desired orientation of the arc tube with respect to the arc lamp and to any mounting or reflecting structure.
摘要:
A means and method for dimming ballasted lamps ensures that sufficient starting voltage is always available to the ballasted lamps, yet allows switching between maximum light output, and one or more dimmed light output levels. Each lamp is connected to a ballast and has a capacitor component in parallel between the ballast and the lamp. A selection or switching device allows control of the desired light output level. For dimmed light output levels, the selection device causes a reduction in capacitance of the capacitance component to reduce the power to each of the lamps. An optional timing device ensures that full capacitance will always be available during starting. Once the selected timing period of the timing device is expired, the selected light level is achieved by automatically changing the capacitance available to each lamp to alter the output of that lamp. The selection or switching device can control a single lamp, or an array of lamps, or multiple arrays of lamps at spaced apart locations.
摘要:
A glare control lamp and reflector assembly and method for glare control which includes a conventional lamp and symmetrical reflector for providing a controlled light beam to a target area. A reflector shield can be positioned on the reflector below the lamp and has the properties of diverging incident light downwardly towards the target area and thus controls reflection upwardly which would produce glare. A glare shield can be positioned on the top of the reflector and extends outwardly from the outer edge of the reflector to block both direct light and reflected light from traveling upwardly and outwardly which would produce glare. In a further combination, a lamp shield can be positioned over a portion of the outermost extending end of the lamp to prevent unreflected light from directly causing glare. The method for controlling glare includes the steps of providing a conventional lamp and reflector assembly, positioning a reflector shield in the bottom of the reflector beneath the bulb to coverge instant light downwardly to the target area, and providing a glare shield extending around and outwardly from the top of the reflector to block and divert incident light downwardly towards the target area. An additional step would be to provide a lamp shield over the outwardmost end of the lamp to block directly emanating light from causing glare. A still further feature and embodiment of the invention includes an arc shield which is positioned directly adjacent to the arc of the arc lamp used with the glare control lamp and reflector assembly. The arc shield serves to block and redirect light from a short distance from the arc in an accurate and efficient manner without much loss of useful light. The arc shield can be used individually or in combination with any of the reflector shields, glare shields, and lamp shields.
摘要:
A variable beam width lighting device including a luminaire assembly having a luminaire fixture to which are operatively mounted a reflector and a lamp and to which is operatively supplied electrical power to produce a light beam. An adjustable lamp positioning means is mounted between the lamp and the luminaire fixture. The adjustable lamp positioning means is responsive to a power means to move the lamp relative to the reflector to vary the width of the light beam between a narrow beam and a wide beam according to choice. The reflecting properties of the reflector are varied to produce smooth transition characteristics when the beam width is changed.
摘要:
A method of producing a composite beam of uniform light from a plurality of defined beam, high-intensity, luminaires mounted on a luminaire assembly, adapted for use with a mobile mounting pole. By determining the characteristics of the defined beam produced by each luminaire, the area to be lighted, and the placement and number of luminaires to be used, the individual luminaire fixtures can be aligned to form a composite photometric beam, meeting the predetermined lighting requirements. The luminaire assembly is adjustably designed as a composite unit for a mathematically derived model of light energy configuration required to illuminate various shaped and sized target areas, such as football fields, etc.