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Light beacon for air-traffic and for navigation purposes

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Publication number
US1961116A
US1961116A US59026032A US1961116A US 1961116 A US1961116 A US 1961116A US 59026032 A US59026032 A US 59026032A US 1961116 A US1961116 A US 1961116A
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Prior art keywords
light
beacon
source
reflector
axis
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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Inventor
Pieter Van Braam Van Vloten
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Koninklijke Philips NV
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Koninklijke Philips NV
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B64AIRCRAFT; AVIATION; COSMONAUTICS
    • B64FGROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
    • B64F1/00Ground or aircraft-carrier-deck installations
    • B64F1/18Visual or acoustic landing aids
    • B64F1/20Arrangement of optical beacons

Description

May 29, 1934. P. 'VAN BRAAM VAN VLOTEN 1,961,116

LIGHT BEACQN FOR AIR TRAFFIC AND FOR NAVIGATION PURPOSES Filed Feb. 1, 1952 Patented May 29, 1934 UNITED STATES LIGHT BEACON FOR AIR-TRAFFIC AND FOR NAVIGATION PURPOSES Pieter van Braam van Vloten, The Hague, Netherlands, assignor to N. V. Philips Gloeilampenfabricken, Eindhoven, Netherlands Application February 1, 1932, Serial No. 590,260 In the Netherlands February 5, 1931 4 Claims.

This invention relates to a light beacon for air-trafilc, navigation and similar purposes.

According to the invention such a light beacon comprises a bar-shaped light source arranged in 5 the focal line either of a cylindrical reflector having preferably a parabolic section or of a cylindrical lens, said light source and the reflector or lens being movable about a vertical axis. In this manner a fan-shaped light beam of great in-.

tensity is obtained which may turn about the vertical axis, thus covering the whole air space or a large part thereof. The beacon may be used, for instance, as a flashing light, a fixed light serving as boardor sector light.

Preferably, the light source and the reflector or lens are arranged in such a manner that the light source is at an acute angle with the axis of rotation. Due to this arrangement the light beam is directed obliquely upwards thus enabling the covering of the whole space.

If it is desired to readily distinguish the light beacon from ordinary white lights then colored light sources are employed. The use of such light sources in combination with the cylindrical reflector or lens offers particular advantages. In fact, the light beacon satisfies the requirement of a. fair luminous intensity in the visual field being obtained by a not exceedingly high consumption of energy also when emitting colored light.

As a red light source it is advantageous to use a low tension neon tube of high efficiency. The comparatively small surface brightness of barshaped light sources has, to a certain extent, the

advantage that the light destined for indicating flying grounds does not daze the pilot on landing. The amplification of the light substantially corresponds to the ratio between the diameter of the luminous gas column and the aperture of the cylindrical mirror or the width of the cylindrical lens.

The invention will be more clearly understood by reference to the accompanying drawing, representing, by way of example, some forms of construction thereof.

Fig. 1 is a vertical section through a beacon according to my invention, while Figs 2-4, respectively, are fragmentary sectional details of various modifications of lamp and reflector, and

lamp and lens combinations.

Fig. 1 shows a stationary fixed lantern 1 having essentially glass walls and in which is mounted a vertical shaft 2 which is uniformly rotated through the intermediary of a transmitting gearing and a motor 3. The shaft 2 has secured to it a frame work 4 in which are mounted the low tension neon tubes 5 and the cylindrical mirrors 6 having a parabolic cross section (see Fig. 2). The collector rings 7 are connected to three anode connections provided at the top of the tubes. The

collector rings 8 serve for supplying the heating current for the incandescent cathode of the neon tubes.

The neon tubes are so arranged that they are at an acute angle with the axis of rotation 2 in such a manner that the point at which the axes of the tubes intersect the axis of rotation 2 lies higher than the neon tubes. Due to this the fanshaped light source is used as economically as possible, it being even possible to observe the light in the zenith. In fact, the fanning of the light in the symmetry plane of the reflectors is so great that an angle of more than 90 is easily covered. Since the axes of the light sources are given an inclined position they have a great efliciency. It is possible to choose such an inclination that the line of maximum luminous intensity has the required elevation.

Fig. 3 shows a cylindrical mirror 9 having a circular cross section and which is placed behind the bar-shaped light source 5. The cross-section of the lens 10, which must emit a more or less parallel flat beam of light, has a shape which is well-known with circular lenses for coast and other lights, this shape being shown in Fig. 3. In this case the cross sections in planes which are parallel to the plane of drawing, are equal.

Fig. 4 shows how the bar-shaped light source 3 may be surrounded by a cylindrical lens constituted by four similar parts 10.

What'I claim is:-

1. A light beacon comprising a rotatable support, an elongated lamp mounted on said support in a substantially upright position, its axis forming an acute angle with the vertical, and means for concentrating the light rays emitted by said lamp into a fan-shaped beam extending from at least the vertical to the horizontal.

2. A light beacon comprising a rotatable support, at least one elongated lamp and a reflector both mounted in a substantially upright position on said support, the axis of said lamp forming an acute angle with the vertical, said reflector concentrating the light rays emitted by said lamp into a fan-shaped beam.

3. A light beacon comprising a rotatable support, a bar-shaped light source and a cylindrical reflector both mounted in a substantially upright position on said support, the axis of said light source forming an acute angle with the vertical, said reflector being parabolic in section, and said light source being disposed in the focal line of said reflector.

4. A light beacon comprising a rotatable support, an elongated lamp mounted on said support in a substantially upright position, its axis forming an acute angle with the vertical, and a lens concentrating the light rays emitted by said lamp into a fan-shaped beam.

PIETIER VAN BRAAM VAN VLOTEN.

US1961116A 1931-02-05 1932-02-01 Light beacon for air-traffic and for navigation purposes Expired - Lifetime US1961116A (en)

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NL1961116X 1931-02-05

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2501437A (en) * 1947-10-06 1950-03-21 Emarco Corp Airport lighting device
US2596603A (en) * 1947-04-21 1952-05-13 Jr Charles T Sands Lighting unit for airfields
US2639366A (en) * 1946-05-23 1953-05-19 Emarco Corp Airport runway marker light
US3383675A (en) * 1965-08-20 1968-05-14 Edward R. Allardice Rotating beacon wand
US4064424A (en) * 1977-01-26 1977-12-20 Hergenrother Rudolf C Visual glide path beacon system
US4729071A (en) * 1986-11-03 1988-03-01 Altman Stage Lighting Co. Low-inertial beam direction lighting system
US4777568A (en) * 1986-11-03 1988-10-11 Altman Stage Lighting Co. Low-inertial beam direction lighting system
US5126923A (en) * 1990-07-27 1992-06-30 Illumitech, Inc. Omnidirectional light
US5155666A (en) * 1990-12-21 1992-10-13 Eg&G, Inc. Light beacon for marking tall obstructions
US6575594B1 (en) 2001-07-17 2003-06-10 Genlyte Thomas Group Llc High bay compact fluorescent light fixture
US6948830B1 (en) * 2004-01-14 2005-09-27 Petrick John T Dual beacon obstruction lighting system

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2639366A (en) * 1946-05-23 1953-05-19 Emarco Corp Airport runway marker light
US2596603A (en) * 1947-04-21 1952-05-13 Jr Charles T Sands Lighting unit for airfields
US2501437A (en) * 1947-10-06 1950-03-21 Emarco Corp Airport lighting device
US3383675A (en) * 1965-08-20 1968-05-14 Edward R. Allardice Rotating beacon wand
US4064424A (en) * 1977-01-26 1977-12-20 Hergenrother Rudolf C Visual glide path beacon system
US4729071A (en) * 1986-11-03 1988-03-01 Altman Stage Lighting Co. Low-inertial beam direction lighting system
US4777568A (en) * 1986-11-03 1988-10-11 Altman Stage Lighting Co. Low-inertial beam direction lighting system
US5126923A (en) * 1990-07-27 1992-06-30 Illumitech, Inc. Omnidirectional light
US5155666A (en) * 1990-12-21 1992-10-13 Eg&G, Inc. Light beacon for marking tall obstructions
US6575594B1 (en) 2001-07-17 2003-06-10 Genlyte Thomas Group Llc High bay compact fluorescent light fixture
US6948830B1 (en) * 2004-01-14 2005-09-27 Petrick John T Dual beacon obstruction lighting system

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