Abstract: This invention provides a headlight unit comprising: a light source; reflector means for reflecting the light from the light source into a beam; and circuit means for adjusting the position of the beam and for controlling the degree of rotation of the reflecting means.

Abstract: A photography light for providing fill illumination includes a first reflector having planar sides and an opening in a rear portion thereof, a second reflector lying within the first reflector and overlying the opening therein. The second reflector forming light compensating channels with the sides of the first reflector and includes at least one aperture in a rear surface thereof through which lamps may be variably positioned. The light compensating channels allow a portion of the light blocked by the backs of the reflectors when the lamps are in a retracted position, to pass to the front portion of the reflectors to be reflected into the photographing field thereby smoothing the illumination therein.

Abstract: 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.

Abstract: A lighting fixture mechanically connected to an object utilizing a lamp supporting body. The lamp supporting body is rotated about an axis and includes a swivel member having a swivel arm which moves over the exterior of the lamp supporting body. A boss mechanically connected to the object extends outwardly from the swivel arm and is supported for movement with the swivel arm. A lamp is also supported to the lamp supporting body and is electrically connected to a source of electrical power.

Abstract: A lamp has an elongated hollow neck with a lighting fixture attached to one of its ends. The other of its ends is attached to a main bracket. The main bracket includes one of either a set of elongated parallel ribs or a set of elongated parallel grooves. A secondary bracket is attached to a support surface and includes the other of either the elongated ribs or the elongated grooves. The main bracket is attached to the secondary bracket by sliding the ribs into the grooves to temporarily attach the lamp fixture to the secondary bracket so at to hold the lamp fixture in a temporary position against a support surface on which the secondary bracket is attached.

Abstract: The invention relates to a device for reproduction and tracing by forming an image of an original, at desired scale which is produced by at least one lens, on a screen on which a sheet of photosensitive materials, such as a picture film, or tracing paper is extended, comprising separate illumination systems for reproduction and tracing, wherein the illumination system for tracing is retracted in a retraced position located off the lighting space of the illumination system for reproduction, and turned over so as to eliminate spoilage of the quality of the reproduced picture by diminishing irregular reflection from the illumination system for tracing to the lens when a part of light from the illumination system for reproduction is emitted thereto during the reproduction operation.

Abstract: A fixture for a high intensity discharge lamp includes a support mechanism allowing the adjustable positioning of the lamp relative to the reflector within the fixture in order to control the beam spread of the light output of the lamp and fixture combination so that focusing of the illumination can be controlled.

Abstract: A lighting assembly including a plurality of housing sections, a series of rib groups arranged circumferentially on the exterior of the housing sections, and a remote control assembly for selectively energizing tri-color diodes embedded in the ribs so that the rib groups can be selectively and independently caused to glow in various colors depending on the aspect of the electrical energy delivered to each particular rib group.

Abstract: A submersible tail light assembly for a boat trailer. The tail light assembly includes an outer housing having an open outer end that is enclosed by a tail light lens. A transparent capsule having an open inner end is sealed to the wall of the housing, and a bulb socket that carries a light bulb is mounted on the inner wall of the housing and is located within the capsule. The electrical leads connected to the bulb socket extend through an opening in the lower portion of the inner wall of the housing. In some cases the housing may also have an open side enclosed by a side marker lens and a side marker bulb socket and bulb are mounted in the housing in alignment with the side marker lens. When the trailer light is submerged in water during launching of a boat, air is entrapped within the capsule preventing water from rising in the capsule to the level of the bulb socket and bulb. The bulb can be conveniently replaced by removing the lens and capsule from the housing.

Abstract: Head-mounted illuminating apparatus, including a visual image pickup means and an audio pickup means for transmittal to a remote station.

Abstract: A variable light source includes a light (14) which projects a white light beam. Three filters sets (60, 62 and 64) each include three pivotable dichroic filter elements. Each element is rotatable around an axis perpendicular to the light beam in order to vary the angle of incidence to vary the hue of the light beam. Rotation of the filter elements also varies the white light transmitted past the filter elements in order to vary the saturation of the light. The distance between the light source (26) and the reflector (28) may be varied to change the divergence of the light beam.

Abstract: The present invention relates to a portable source of light which can be easily attached to the object to be illuminated, contains a self contained energy source, provides a shielding mechanism by which the light bulb is prevented from coming into contact with other objects, can be folded in order to be easily transported and provides a mechanism by which the source of light can be automatically turned off when the container in which the light source is housed comes in contact with another physical object.

Abstract: One end of an elongated flexible strap is connected to a screw base. The strap extends downward through a central opening in a cover and in a reflector. After the screw base is threaded into a socket, a friction ring is pushed upward along the flexible strap, drawing the reflector up and a trim ring tight against the ceiling which surrounds the recessed fixture. The friction ring holds the lamp and reflector upward on the strap, without stretching the strap and without pulling downward on the screw base with a force substantially greater than a weight of the reflector and trim ring. While the friction ring holds the lamp on the strap, a gripper is moved into position beneath the friction ring to permanently support the friction ring. The strap is then clipped below the gripper.

Abstract: The light comprises a cluster of lamp units (100), pivotally mounted at (6,7), on respective chassis (8) running on a loop track. The lamp units are approximately equidistant from a central axis and illuminate a common patch on the axis. Each chassis (8) is connected to a respective chain (35) which may be driven to move individual chassis (8) along the track, changing the configuration of the cluster. A linkage (26,27,31) enables the lamp unit inclination to be varied and a linkage (12,13,14,16,18) enables the relative positions of a bulb (1) and a concave reflector (10) to vary, thereby varying the beam width. The rollers (18) of each unit roll on a surface of a first common hoop and the rollers (31) on a surface of a second common hoop. The hoops are movable enabling the inclination of beamwidth of all the lamp units to be varied simultaneously, changing the patch range or size.

Abstract: A brake light incorporated in a side view mirror housing is disclosed. The brake light may be fixedly attached to the housing and viewable from the rear of the vehicle. Brake lights which move from a stored position within said mirror housing to an in use position exterior of said housing are also disclosed. The further the brake light portion is from the vehicle the more viewable it will be from the rear of the vehicle.

Abstract: In the preferred embodiment described and illustrated, the lamp comprises a box-like receptacle in which to confine a light. One side of the box is open, and a grid-type shield is pivotably coupled thereto, and latchingly engaged with clasps, to expose illumination from a receptacle confined light and to protect such light from damage. A hook is pivotably journalled from one end of the receptacle, for suspending the receptacle. The journalling end of the hook is U-shaped, and the journalling end of the receptacle has a plurality of detent holes formed therein, whereby the U-shaped end of the hook can be detentably engaged with any one of the detent holes to direct the illumination as desired. The exterior surfaces of the receptacle and shield are flat, to inhibit rolling of the lamp.

Abstract: Lamp, including a head, a concave mirror reflector disposed in the head, a battery case, and a carrier for a light source being integral with the battery case forming a one-piece unit, the reflector and the carrier being movable to each other in axial direction, and a method for producing the lamp.

Abstract: A first support arm section is hingedly connected to a second support arm section to form therewith a light source support arm which can be selectively articulated into either an extended or a folded over disposition. A first end of the support arm is formed for connection to a lamp support post and base; while a second end of the support arm is formed to support a light source such as a bulb socket and a lamp shade. The first support arm section and second support arm section are each formed of tubular stock to facilitate electrical wiring and a spring has its ends connected to adjacent hinged portions of the first and second support arm sections to surround hide and protect the electrical wiring and to bias the first and second support arm sections towards each other. In the extended disposition the support arm sections are coaxially aligned and carry a light source so that the illumination is directed downwardly.

Abstract: A scanning light source system for projecting onto each area of a complete painting or other planar subject a beam of light and for moving said beam vertically and horizontally. The vertical movements comprise a succession of sweeps across the painting for the purpose of consecutively illuminating each part of the painting sufficiently strongly so that the whole may be photographically reproduced more satisfactorily than has been possible heretofore, i.e. through the use in combination of Kodak #6121 duplicating film or another gamma 1.0 film, polarizing filters, and a lens aperture of f22 or smaller. The horizontal movements position the light source for each vertical sweep. Said system enables a beam of light to be projected onto each part of the entire surface of the subject painting at an angle of greater than 40.degree. and less than 80.degree., thereby enabling brush-stroke and texture detail of a painting to be accurately rendered in a photographic reproduction.

Abstract: A bracket mount fits directly over one end of a rectangular housing 17a of a portable engine-driven electric generator 15a and supports a flood lamp 10a powered by generator 15a. A bracket includes a frame 20a extending around and fitted to a generally rectangular end of generator housing 17a. Lamp head 10a has a supporting knuckle 50 with a mounting arm 52 fixed in a socket 60 in an upper region of bracket 20a so that lamp head 10a can pivot on a horizontal axis through knuckle 50 relative to mounting arm 52 and bracket 20a. Lamp head 10a can be folded under socket 60 so that the front face of the lamp is close against bracket 20a and the end of generator housing 17a for protective storage, and lamp head 10a can be pivoted to upwardly aimed positions accommodated by the downward slope of socket 60. Socket 60 and mounting arm 52 are hollow and provide a conduit for electric conductors leading from generator 15a to lamp head 10a.

Abstract: A lighting assembly especially adapted for promoting growth of plants in a greenhouse environment and the like, having a reflector cone with a light reflecting surface at a single cone angle of from about 76.degree. to about 64.degree. and preferably at an angle of about 68.degree. with respect to the center axis of the cone, and having a high powered halide or like light in part extending substantially below the plane of the outer edge of the reflector cone when the assembly is supported in a depending manner.

Abstract: An illumination system having a continuous fixed ceiling panel, at least one light source suspended by a telescoping arm from the panel and a split-core transformer formed by two electroinductive coils enclosed in permanent magnets through which a magnetic field is created for the sealed transfer of electrical energy through the panel to the light source. One magnet is disposed on opposite surfaces of the panel. Rollers or a pneumatic system may be disposed between each magnet and the surface of the panel on which the magnet is disposed for sliding the magnets over the surfaces of the panel while maintaining the transfer of electrical energy. Secondary lighting means may also be included.

Abstract: A portable emergency light comprising two lamps at slopes on two lateral sides with the slope design to lower their height and space requirement, connection means consisting of slipper and slotted block between each lamp and light body, so that the lamps is detachable for moving to any other area for lighting purpose; controllers for lighting, extinguishing or flickering each respective lamps for lighting or warning purpose to add function of the emergency light and a plug on its holder to connect rectified and voltage reduced power source to the emergency light while it is positioned on the holder and the emergency light is disconnected from the said power source by applies its own built-in battery after it is detached from the holder.

Abstract: An illuminated module connectable with similar modules to form an illuminated sign, especially an address or like location sign, comprises an enclosure for an illumination source having an indicia-bearing surface and a plurality of electrical and mechanical interconnecting means on at least two surfaces to permit the assembly of adjacent modules into different configurations.

Abstract: An improved optical focusing system is provided which includes a parabolic reflector and a fresnel lens situated with respect to one another to share a common focus point. The improved system is designed to collimate substantially all of the available light emitted from a light source located at the common focus point and project the light along a projecting axis. Depending on the limitations placed upon the size of the parabolic reflector, a retroreflector situated about the periphery of the fresnel lens can be added to the system to maximize the amount of emitted light which the system can process and collimate.

Abstract: Apparatus for providing the operator of a light projector suitable for performance lighting and capable of beam azimuth and elevation control with data as to the current values of the projector's adjustable parameters. Current azimuth and elevation data is presented both visually, by means of a viewfinder mounted on the projector, and numerically, by means of digital displays. Alternatively, visual feedback may be provided with an imaging device having a field of view substantially the same as the beam mounted at the projector coupled to a display located at a location remote from the projector. A drive for remotely controlling the light projector in azimuth and elevation is then provided.

Abstract: An eye-safe compact laser simulator for simulating a laser spot on or off axis. The simulator used to test laser range and spot receivers.

Abstract: A portable, variable position light having a main vertical shaft and folding legs on the bottom thereof for holding such main shaft in a vertical position when in use. A pair of arms having elbows therein are attached to the main shaft such that it can be positioned vertically at any position along the length of the main shaft and whereby the angle of the arms can be adjusted to various desired angles with respect to the main shaft. The arm members have elbows therein for allowing the pivoting of a first inner part to a second outer part and whereby the elbow has a mechanism thereon for locking such second outer part with respect to the first inner part whereby the angle between the first and second parts can be maintained in whatever position desired. A standard light clamp has a locking mechanism attached to one end thereof for insuring that such lights do not slip off of the arm members.

Abstract: The light comprises a cluster of lamp unts (100), pivotally mounted at (6,7), on respective chassis (8) running on a loop track. The lamp units are approximately equidistant from a central axis and illuminate a common patch on the axis. Each chassis (8) is connected to a respective chain (35) which may be driven to move individual chassis (8) along the track, changing the configuration of the cluster. A linkage (26,27,31) enables the lamp unit inclination to be varied and a linkage (12,13,14,16,18 ) enables the relative positions of a bulb (1) and a concave reflector (10) to vary, thereby varying the beam width. The rollers (18) of each unit roll on a surface of a first common hoop and the rollers (31) on a surface of a second common hoop. The hoops are movable enabling the inclination of beamwidth of all the lamp units to be varied simultaneously, changing the patch range or size.

Abstract: A surgical headlamp is disclosed that is removably mounted to a headband and which utilizes a remote light source connected via a fiberoptic cable. The mounting arrangement includes frictional sliding members permitting adjustment of the lamp to an exact in between the eyes location.

Abstract: A retractable automobile head-light device including a retractable head lamp mounted through a linkage for movement between a retracted position and an extended position. A lamp cover panel is mounted at the rear end portion on the automobile body for vertical movements and twisting movements. A lamp cover driving mechanism includes a pair of driving links each connected at one end to the lamp cover panel through a lug and at the other end to the linkage so that the lamp cover is swingably moved together with the movement of the head lamp between the extended and retracted positions. The driving link at the laterally outboard side is larger in length than the inboard link and the lugs for the links have a difference in length complementary to the difference in lengths of the driving links.

Abstract: A lamp stabilizer adapted to be mounted to the housing of a light fixture includes a mounting bracket secured to the light fixture and an elongated rigid rod slidably mounted for axial movement with respect to the bracket. The lamp stabilizer has a lamp engaging socket mounted on one end of the rod for selective engagement with an outer end portion of a lamp mounted in the housing. The lamp engaging socket is generally frustum-shaped and has at least one layer of heat insulating and lamp cushioning material secured to an inner side thereof for direct engagement with the outer end portion of the lamp. The lamp engaging socket is positioned with respect to the lamp by moving the rod with respect to the mounting bracket. A friction clip is selectively securable along the axial length of the rod and when secured thereto, engages the mounting bracket to restrict movement of the rod in direction away from the lamp.

Abstract: A headlamp device for bicycles and like vehicles, which includes a reflector, a bulb having its end fixedly inserted through an opening formed in said reflector, an illumination covering mounted on the front face of said reflector, and a battery casing attached integrally to the rear portions of these members. The improvement comprises an outwardly extending locking piece affixed to said end of said bulb, a cylindrical extension for the insertion of said end of said bulb provided to the rear edge of said opening in said reflector, and the rear periphery of said cylindrical extension being stepped to define locking portions differing in axial length, said locking portions being engaged within said locking piece, whereby, when said bulb is fixedly inserted into said opening in said reflector, said locking piece can selectively be locked onto said locking portions differing in axial length.

Abstract: A flexible flashlight which may provide light at any angle even in an environment in which the area in which to position a flashlight is extremely limited. A bellows is provided one end of which is threaded onto the body tube of a flashlight, the other end of which contains a bulb along with a lens and bezel. The bellows is made of a semi-rigid material so that once its curvature is formed it will remain fixed indefinitely until reformed by the user. The flexible flashlight may be placed on any flat surface or may be attached to any ferro-magnetic surface. In either case once the flashlight has been positioned both hands are free to perform work. An internal coiled helical cord is provided inside the bellows section to assure good electrical connection and to minimize the possibility of damaging the electrical pathway due to frequent flexion of the bellows.

Abstract: An articulated task lamp for exemplary use as a counterbalanced drafting table lamp including pivotally interconnected base assembly, lower support arm, upper support arm, and lamp head, and counterbalance linkage operable within said lower support arm and base assembly and provided a novel connection to the upper support arm. The counterbalance linkage includes a torsion counterbalance spring in the base assembly having a force transmitting connection to a link member which is pivotally interconnected to a compensating link pivotally mounted intermediate its ends to the base assembly, the other end of said compensating link being pivotally connected to an elongated link member carried and operable within the lower support arm and having its other end pivotally connected to a crank member enclosed within a mid joint means providing a pivotal connection and force transmitting connection between the upper and lower support arms.

Abstract: A high intensity discharge light fixture is provided wherein the conventional gaskets are replaced by joints which prevent water from entering the fixture but permit free air flow. The joints are formed by components, at least one of which terminates in a U-shaped section and the other of which interdigitates with the U-shaped section. The leg of the U-shaped section directed toward the fixture interior is longer than the leg directed away from the fixture thereby providing a water barrier.

Abstract: A portable lighting apparatus having a lamp assembly attached to the top of an elongated mast, preferably formed of interconnectable relatively short sections. The lamp assembly includes at least one electric lamp affixed to a horizontal shaft for rotation about a horizontal axis. Associated with the horizontal shaft are a pair of gears, suitably a vertical rack and a pinion engaged therewith, the pinion being operatively attached to the horizontal shaft. A spring associated with the pinion tends to rotate the gear in a direction which biases the engaged rack downwardly. The lower end of the rack abuts a movable pushrod generally centrally located within the hollow mast and running the length thereof. The lower end of the mast is telescopically mounted on a mast support provided with a fixed vertical stoprod which abuts the lower end of the pushrod.

Abstract: A swing arm support housing is formed with a pair of openings spaced one from the other but each formed along parallel axis. One opening extends into but not through the housing and is on a size and configuration to be mounted on top of a lamp support post. The other opening extends completely through the housing and is fitted proximate each of its ends with aligned rings formed of a plastic material and retained in place by end rings. The aligned rings slidably and rotatably receive a lamp swing arm. At least one of such rings constitutes a clamping ring that has a longitudinal slit to permit distortion of the ring, proximate the slit and in a radial direction, to clamp same against the lamp swing arm to hold the swing arm in selected positions.

Abstract: An apparatus containing a headlight gimballed for rotation within the enclosure of the apparatus. The headlight is capable of exposure through an opening in the enclosure, and is capable of directional adjustment in accordance with signals produced at a remote location. A cover is provided for selectively enclosing the opening which exposes the headlight, and is capable of selectively enclosing or exposing the opening in accordance with signals produced at a remote location.

Abstract: Chandeliers having a center column, a circular arm supporting plate attachable to the center column, and a plurality of arms attachable or attached to the plate, the chandelier being adapted to be compactly packaged with said parts in a knocked-down or knocked-down and folded condition, and to be readily set up with the arms in an operative position extending radially outwardly from the plate.

Abstract: An improved luminar having an adjustable lamp socket is disclosed. The adjustable socket comprises a generally cylindrical shaped socket shield which is fixed to the ballast housing of the luminar and is positioned around the lamp socket with the socket shield having formed therein a bracket channel and a guide channel. A generally U-shaped bracket is fixedly attached to the socket and has identification means formed thereon designating the relative position of the socket within the socket shield. The bracket also has formed thereon at least one protuberance for positioning in the guide channel means formed on the socket shield. The generally U-shaped bracket is positioned within the bracket channel means and is designed for movement within the channel in the desired position of the lamp in the reflector of the luminar. Locking means are provided for locking the U-shaped bracket within the socket shield at the desired pre-determined position.

Abstract: A mounting bar for spacing and retaining indicator lights for use with electronic equipment. An elongated channel bar includes a cavity extending along the front wall of the bar. Light emitting diode (LED) modules having light emitting diodes (LED's) mounted therein are frictionally engaged to the bar within the elongated cavity at predetermined locations. This permits LED modules to be mounted and arranged at predetermined spacings as requested by the user without retooling or special handling. The LED modules also include connector leads extending perpendicular from the LED's for connection to a printed circuit board of electronic equipment.

Abstract: A kinematic lamp mount for mounting a spectral source lamp (3) such as a hollow cathode lamp accurately with respect to an optical axis of, for example an atomic absorption spectrophotometer comprises a base member (100), a lamp holder (1) and two spring means (120, 121) which urge the holder (1) into contact with the base member (100). The holder (1) is provided with three ball ended feet (6,8,10) two of which (6,8) are adjustable. Two feet (6 and 10) engage in an arcuate V-groove (102) while the third engages in a radial V-groove (103) giving kinematic connection between the holder (1) and base member (100).By providing kinematic connection between the holder (1) and base member (100) the lamp holder (1) and hence the lamp (3) may be removed from and later replaced sufficiently accurately on the base member (100) that no re-adjustment is necessary.

Abstract: An improved shop light for being releasably mounted in a desired location for illuminating a work area. The shop light (10) comprises a handle member (12) provided with a light bulb socket (16) for releasably receiving a light bulb (18). Electricity for powering the light bulb (18) is supplied by a cord (20) received in handle member (12). A guard member (34) is releasably engaged to the handle member (12) in order to protect the light bulb (18) from damage. Magnetic mounting means (52) are provided for selectively mounting the shop light (10) on a metalic surface, such means being capable of selectively pivoting the shop light (10) to most desirably illuminate a preselected work area. The shop light (10) is further provided with a hook member (50) for hanging the shop light (10) at a desired location.

Abstract: A portable light assembly conformed for excitation from the cigarette lighter outlet of an automobile comprises two light housings each universally pivoted from a central handle assembly. The central assembly includes opposed pivot fittings from which two laterally disposed swivel blocks are pivoted, each swivel block in turn pivotally supporting a corresponding light. In this form the alignment of each light may be individually selected to produce any desired beam pattern, the same pivotal freedom providing for a collapsed alignment where the lens portions of each light are protected from damage.

Abstract: A bracket mount fits directly over one end of a rectangular housing 17 of a portable engine-driven electric generator 15 and supports a flood lamp 10 powered by generator 15. A bracket 20 includes a frame extending around the end of generator housing 17 and projections 21 that reach back to mounting locations where bracket 20 is screwed to generator 15. A gooseneck 30 secured to an upper region of bracket 20 curves downward and outward in a gooseneck shape and terminates in a knuckle that supports lamp head 10 for vertical pivotal movement. Lamp head 10 can be folded under gooseneck 30 so that the front face of the lamp is close against bracket 20 and the end of generator housing 17 for protective storage, and lamp head 10 can be pivoted to upwardly aimed positions accommodated by the curvature of the upper side of gooseneck 30. Gooseneck 30 is hollow and provides a conduit 40 for electric conductors leading from the generator to the lamp head.

Abstract: A lighting fixture emits a beam covering in excess of 180.degree. by employing a reflector of parabolic cross-section and placing a linear light source perpendicular to the parabolic axis at or slightly forward of the parabola ends. A mounting plate containing the lamp socket and lamp ballast is connected to the reflector by means of a single screw to facilitate installation and maintenance. End members for the reflector include projecting collars which rotatably receive annular flanges from junction boxes through which power supply leads pass to connect to the lamp socket and pass through a raceway located behind the reflector to other fixtures mounted in tandem. The collar and flange can be secured together in any rotational position within a range of 360.degree.. A swivel form of junction box includes two members which are mutually rotatable about an axis perpendicular to the collar/flange axis to increase the positional adjustability of the fixture.

Abstract: The present invention provides a spotlight adjusting system for controlling the beam of a spotlight. A ellipsoidal reflector-lamp assembly is movable to a plurality of positions relative to the iris. The diaphragm of the iris is independently adjustable to a plurality of positions so that the light being reflected from the focal area of the reflector assembly can be controlled between passing the full beam received at the iris to a portion of the beam received there. The rear lens is adjustable relative to the iris and the front lens. The system provides mounting structures for both a long throw and a short throw front lens so that the system can be selectively mounted with either a removable long or short focal front lens.

Abstract: A light projector suitable for performance lighting and provided with a means capable of adjusting beam azimuth and elevation from a remote location is provided with an input device locating the operator's finger, hand, or a stylus in two dimensions by non-mechanical means. The azimuth and elevation control means is capable of operation in either an incremental or rate of displacement mode.

Abstract: In order to provide for automatic replacement of lamp bulbs (lamps) when they fail to illuminate and to enhance the reliability of signal lamps, such as those which signal oncoming trains as they move along railway tracks, a plurality of lamps are disposed angularly spaced from each other on one side of a turntable which is rotatable under spring bias to bring the lamps successively into positions in alignment with the lens of the signal lamp. A latching mechanism having a latch member incorporated into the turntable and a detent member operated by a solenoid provides for releasable engagement of the turntable so as to enable it to move between the successive positions.