CA1059963A - Remote controlled searchlight - Google Patents
Remote controlled searchlightInfo
- Publication number
- CA1059963A CA1059963A CA261,635A CA261635A CA1059963A CA 1059963 A CA1059963 A CA 1059963A CA 261635 A CA261635 A CA 261635A CA 1059963 A CA1059963 A CA 1059963A
- Authority
- CA
- Canada
- Prior art keywords
- frame
- lamp
- intermediate frame
- switches
- electric motor
- Prior art date
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
- F21V21/14—Adjustable mountings
- F21V21/30—Pivoted housings or frames
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
- B60Q1/02—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
- B60Q1/04—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights
- B60Q1/06—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights adjustable, e.g. remotely-controlled from inside vehicle
- B60Q1/076—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights adjustable, e.g. remotely-controlled from inside vehicle by electrical means including means to transmit the movements, e.g. shafts or joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
- B60Q1/02—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
- B60Q1/24—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments for lighting other areas than only the way ahead
- B60Q1/245—Searchlights, e.g. adjustable from within the vehicle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/50—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by aesthetic components not otherwise provided for, e.g. decorative trim, partition walls or covers
- F21S41/55—Attachment thereof
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
- Control Of Multiple Motors (AREA)
- Control Of Position Or Direction (AREA)
Abstract
REMOTE CONTROLLED SEARCHLIGHT
ABSTRACT OF THE DISCLOSURE
A lamp mounted in a frame is rotatable about a vertical axis continuously in either direction upon appropriate energi-zation of a reversible electric (azimuth) motor. The lamp frame is also pivotal about a horizontal axis by linkage means upon appropriate energization of a reversible electric (eleva-tion) motor. Energization and direction of rotation of the motors either individually or simultaneously is controlled by a remote control unit having four switches actuatable singly or in pairs by manually operable means. A pair of switches limit forward or rearward pivoting of the lamp frame by interrupting energization of the elevation motor. A brush rotatable with the lamp frame and successively engageable with a plurality of collector ring sectors serves to energize remote azimuth-position-indicating bulbs.
ABSTRACT OF THE DISCLOSURE
A lamp mounted in a frame is rotatable about a vertical axis continuously in either direction upon appropriate energi-zation of a reversible electric (azimuth) motor. The lamp frame is also pivotal about a horizontal axis by linkage means upon appropriate energization of a reversible electric (eleva-tion) motor. Energization and direction of rotation of the motors either individually or simultaneously is controlled by a remote control unit having four switches actuatable singly or in pairs by manually operable means. A pair of switches limit forward or rearward pivoting of the lamp frame by interrupting energization of the elevation motor. A brush rotatable with the lamp frame and successively engageable with a plurality of collector ring sectors serves to energize remote azimuth-position-indicating bulbs.
Description
.
BACKGROUND OF THE INVENTION
-The present invention relates to a searchlight which is adapted to be mounted on a support such as a vehicle, which is rotatable about a vertical axis and pivotal about a horizontal axis, and which is controlled from a position remote from its mounting.
The searchlight assembly of the present invention has a base frame, an intermediate frame supported by the base frame and rotatable about a vertical axis, and a lamp frame supported by the intermediate frame and pivotal about a hori-zontal axis. Means are provided for rotating the intermediate frame, and eeparate means are provided for pivoting the lamp frame.
The rotating means includes a gear member secured to the intermediate frame, and a reversible electric (azimuth) motor secured to the base frame and having a drive shaft.
Power transmission means extends between the drive shaft of the azimuth motor and the gear member for rotating the latter.
The intermediate frame, and the lamp frame, are rotatable about a vertical axis continuously in either direction upon appropriate energization of the azimuth motor.
The pivoting means includes linkage means supported by the intermediate frame and having connection with the lamp frame. Actuation of the linkage means, for pivoting the lamp frame, is controlled by a plunger engageable with the linkage means, and a reversible electric (elevation) motor secured to the base frame and having a drive shaft. Power transmission means extends between the drive shaft of the elevation motor and the plunger for axially moving the latter. The lamp frame i5 pivotal about a horizontal axis through a range of 120 upon appropriate energization of the elevation motor.
The electric circuit means of the motors incorporates four switches located in a remote control unit. This unit includes manually operable means for actuating the switches separately or in pairs to control energization and direction of rotation of the motors either individually or simultaneously.
The motors are of the permanent magnet type and.upon deenergization stop immediately thus obviating the need for any braking mechanism. The electric circuit means of the elevation motor incorporates a pair of switches which limit forward or rearward pivoting of the lamp frame by interrupting energization of the elevation motor.
A plurality of azimuth-position-indicating bulbs are located in a remote control module. A plurality of collector ring sectors are supported by the base frame, and are engageable by a brush carried by the intermediate frame. The ring sectors, brush and bulbs are incorporated in electric circuit means. The brush is successively engageable with the ring sectors as the intermediate frame is rotated for energizing one of the bulbs to indicate the azimuth position of the lamp frame and lamp.
Broadly speaking, therefore, in one embodiment the present invention provides a searchlight assembly for an emergency motor vehicle comprising a base frame for mounting on the vehicle, an intermediate frame supported by the base frame and rotatable about a vertical axis, means for rotating the intermediate frame, a lamp frame supported by the intermediate frame and pivotal about a horizontal axis, means for pivoting the lamp frame, a remote unit for mounting within the vehicle, theremote unit including azimuth-position-indicia for indicating the position of the searchlight, a plurality of collector ring sectors carried by the base frame, and a brush càrried by the intermediate frame and successively engageable with the collector ring sectors as the intermediate frame is rotated for energizing the azimuth-position-indicia.
ywl/~ ~ - 2 -BRIEF DESCRIPTION OF TIIE DRAWINGS
Figure 1 is a front elevational view of the search-light assembly of the present invention;
Figure 2 is a front elevational view of the control module and control unit of the present invention;
Figure 3 is a sectional view taken substantially along the line 3-3 in Figure 2 looking in the direction indicated by the arrows;
Figure 4 is a sectional view taken substantially along the line 4-4 in Figure 3 looking in the direction indicated by the arrows;
Figure 5 is a schematic view of the switches incor-- 2a -dap/
~059963 porated in the control unit shown in Figuxes 3 and 4;
Figure 6 is a plan view of the searchlight assembly of Figure 1 with portions of the enclosure means removed;
Figure 7 is a front elevational view corresponding generally to Figure 1 but shows the searchlight assembly with portions of the enclosure means removed;
Figure 8 is a sectional view taken substantially along the line 8-8 in Figure 7 looking in the direction indicated by the arrows;
Figure 9 is a sectional view taken substantially along the line 9-9 in Figure 8 looking in the direction indicated by the arrows;
Figure 10 is a partial elevational view taken substan-tially along the plan 10-10 in Figure 8 looking in the direc-tion indicated by the arrows;
Figure 11 is a sectional view taken substantially along the line 11-11 in Figure 8 looking in the direction indicated by the arrows;
Figure 12 is a partial side elevational view of the searchlight assembly of Figure 1 with portions of the enclosure means removed; and Figure 13 is a schematic view of the electrical circuit of the remote controlled searchlight of the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring now to Figures 1 and 2, the remote controlled searchlight of the present invention comprises a searchlight assembly 20, a control module 22, and a control unit 24. By way of illustration, the searchlight assembly 20 may be mounted on the roof of a vehicle, while the control module 22 is moun-ted on the dashboard of the vehicle.
As shown in Figures 7 and 8, the searchlight assembly ~059963 20 comprises a base frame 26 having an upper horizontal support wall 28. Projecting downwardly from the support wall 28 are a central boss section 30 through which is formed an opening 32, a radially offset boss section 34 through which is formed an opening 36, a plurality of circumferentially spaced-apart leg sections 38, and an interior side wall section 40 united with two end wall sections 42 and 44. Project~ng upwardly from the support wall 28 are a plurality of circumferentially spaced-apart post sections 46, and a plurality of circumferentially spaced-apart columns 48.
Supported by the base frame 26 is an intermediate frame or carriage 50 having an upper horizontal support wall 52.
Projecting downwardly from the support wall 52 is a central hub section 54 through which is formed an opening 56. The hub sec-tion 54 seats on the base frame support wall 28, and is provided with an annular shoulder 58. Extending through the base frame opening 32 and the intermediate frame opening 56 is a bearing sleeve 60 about which the intermediate ~rame 50 is rotatable on a vertical axis. The bearing sleeve 60 is retained in place by snap rings 62 and 64.
Selectively operable means for rotating the intermediate frame 50 comprises a gear member 66 secured to the hub section 54 against the shoulder 58 thereof. Meshing with the gear mem-ber 66 is a pinion 68 secured on the upper end of a pinion shaft 70 journaled in a bushing 72 secured in the base frame opening 36. Secured to the lower end of the pinion shaft 70 is a hub member 74 having a reduced nose section 76 defining an annular shoulder 78. A spur gear or worm wheel 80 is secured on the nose section 76 against the shoulder 78 in frictionally releas-able relationship by means of a conventional slip clutch unit 82. Meshing with the gear 80 is a worm gear 84 secured on the end of the drivé shaft 86 of an electric reversible permanent magnet (azimuth) motor 88 seaured to the ~ase frame side wall 40 (Figure 12). The intermediate frame 50 can be rotated about a vertical axis continuously in either direction upon appro-priate energization of the azimuth motor 88.
As shown in Figures 7, 8 and 12, a pair of upright laterally-spaced brackets 90 and 92 are secured to the inter-mediate frame support wall 52. Journaled in the upper ends of the brackets 90 and 92 are opposed stub shafts 94 and 96 pro-vided at the sides of a ring-like lamp frame or holder 98 having a radially offset side portion 99. A sealed beam lamp 100 is releasably mounted within the lamp frame 98 by means of a plura-lity of circumferentially spaced-apart retainer clips 102. The lamp frame 98 and lamp 100 are pivotal about the horizontal axis of the stub shafts 9~ and 96.
Linkage means 104, which is supported by the inter-mediate frame 50 and has connection with the lamp frame 98, is actuatable for pivoting the lamp frame 98 and lamp 100. The linkage means 104 comprises a horizontal shaft 106 journaled at its ends in the intermediate frame brackets 90 and 92. Secured ; 20 to the shaft 106 intermediate of the ends thereof is a lever 108 the free end of which overlies the bearing sleeve 60. Also secured to the shaft 106 is a bellcrank 110; and a link 112 is pivotally connected at its one end to the bellcrank 110 and at its other end to the lamp frame flange portion 99 above the stub shaft 96. Pivotal movement of the lever 108 effects pivot-ing of the lamp frame 98 and lamp 100.
Selectively operable means for controlling actuation of the linkage means 104 comprises a plunger 114 slidably mounted at its upper portion in the bearing sleeve 60. The lower por-tion of the plunger 114 is threaded and has threaded engagement with a threaded sleeve 116 to which is secured a spur gear or worm wheel 118. Meshing with the gear 118 is a worm gear 120 secured on the end of the drive shaft 122 of an electric revers-ible permanent magnet (elevation) motor 124 secured to the base frame side wall 40, parallel to the motor 88.
The upper end of the threaded sleeve 116 bears against a spacer ring 126 which is restrained against upward movement by the bearing sleeve 60, while the lower end of the threaded sleeve 116 bears against a bearing unit 128 which is restrained against downward movement by the horizontal wall of an L-shaped cover member 130 secured to the base frame walls 40, 42 and 44.
Accordingly, the rotatable threaded sleeve 116 is held against vertical movement. Secured to the lower end of the plunger 114 is the one end of a horizontal strap member 132 having an up-wardly directed arm portion 134 which slidably projects through a slot formed in the horizontal wall of the cover member 130.
The strap member 132 and arm 134 serve to restrain the plunger 114 against rotation. By reason of the described mounting of the sleeve 116 and plunger 114, rotation of the sleeve 116 effects vertical movement of the plunger 114.
An elongated coil spring 136 extends between the inter-mediate frame support wall 52 and a lever plate 138 secured to the lamp frame offset portion 99. The spring 136 urges the lamp frame 98 to pivot forwardly, and thereby maintains the free end of the lever 108 in engagement iwth the upper end of the plunger 114 whereby vertical movement of the latter controls actuation of the linkage means 104. When the lamp frame 98 is pivoted rearwardly, the spring 136 engages and bends about the upper end of the bracket 92 thereby to insure an adequate return spring force. In sum, the lamp frame 98 can be pivoted about a horizontal axis either forwardly or rearwardly upon appropriate energization of the elevation motor 124. To achieve balanced pivoting, the center of gravity of the lamp frame 98 and lamp 100 is located approximately on the axis of lOS9963 the stub shafts 94 and 96.
The lamp frame 98 is adapted to be pivoted within a range of 120, that is, between a position 30 forwardly of vertical where the beam of light from the lamp 100 is directed 30 downwardly, and a position 90 rearwardly of vertical where the beam of light from the lamp 100 is directed straight up-wardly. The extreme limits of the indicated range of pivoting are established by a pair of switches 140 and 142 which are interposed in the electrical circuit of the elevation motor 124 and which are secured to a bracket 144 mounted on the side of the base frame end wall 44. The normally closed switches 140 and 142 are arranged to be opened by a generally C-shaped switch.
actuator 146 secured to the outer end of the strap member 132.
As the plunger 114 moves downwardly and the lamp frame 98 is pivoted to a position 30 forwardly of its vertical position, the upper leg of the switch actuator 146 engages one arm of the switch 140 and separates the same from the adjacent arm thus opening the switch 140 and interrupting energization of the elevation motor 124. Conversely, as the plunger 114 moves upwardly and the ;amp frame 98 is pivoted to a position 90 rearwardly of its vertical position, the lower leg of the switch actuator 146 engages one arm of the switch 142 and separates the same from the adjacent arm thus opening the switch 142 and inter-rupting energization of the elevation motor 124.
To accommodate energization of the lamp 100 and unlimi-ted rotation of the latter in either direction, and to furnish an indication of the rotative position of the lamp 100 as will be described more fully hereinafter, a collector ring unit 148 is mounted intermediate of the base frame support wall 28 and the intermediate frame support wall 52. The collector ring unit 148 cor.prises an insulator panel 150 secured to the base frame post sections 46. Suitably affixed to the panel 150, as shown in Figure 11, are an inner collector ring 152 engaged by a brush 154, an intermediate collector ring 156 engaged by a brush 158, and four outer collector ring sectors 160, 162, 164 and 166 engageable by a brush 168. The brushes 154, 158 and 168 are respectively mounted in brush holders 170, 172 and 174 (Figures 6 and 9) secured to the intermediate frame support wall 52.
The lamp 100 preferably is of the dual-filament type which includes a spotlight filament and a floodlight filament.
As shown in Figure 10, the rear of the lamp 100 is provided with a spotlight terminal 176, a floodlight terminal 178, and a common terminal 180. Appropriate electrical leads extend from the terminals 176 and 178 to the brushes 154 and 158, respectively. Also, appropriate electrical leads extend from the several collector rings and sectors, the azimuth motor 88, the limit swit~hes 140 and 142 and a common ground to a socket 182 (Figure 7). As shown in Figure 1, the searchlight assembly 20 includes enclosure means for sealing the same against dirt, water and the like, and for preventing interference with motion of the lamp 100. The enclosure means comprises a bottom pan-shaped member 184 secured to the lower ends of the base frame leg sections 38, an upper transparent dome member 186 resting on the base frame columns 48, an intermediate generally annular member 188 extending vertically between the members 184 and 186, and a retaining ring 190.
Referring again to Figure 2, the control module 22 com-prises a casing 192 having a front panel 194 formed with four circumferentially spaced apart apertures 196 behind which are mounted azimuth-positioning-indicating bulbs 198, 200, 2~2 and 204. These bulbs are electrically connected respectively with the collector ring sectors 160, 162, 164 and 166. As the intermediate frame 50 is rotated, the brush 168 successively losas63 engages the collector ring sectors whereby the bulk correspond-ing to the brush-engaged ring sector is energized for indicating the azimuth quadrant position of the intermediate frame 50, lamp frame 98 and lamp 100.
The control module panel 194 is also formed with an opening 206 in which a main double-pole double-throw switch 208 is mounted. The switch 208 includes a manually operable rocker button 210 having a center switch-open position. Movement of the button 210 to the left effects energization of the spot-light filament of the lamp 100, while movement of the button 210 to the right effects energization of the floodlight filament of the lamp 100. In either the right or left position of the but-ton 210, the motors 88 and 124 are also conditioned for opera-tion. A suitable multiple conductor cable (not shown) serves to electrically connect sockets at the rear of the module casing 192 with the searchlight assembly socket 182.
Referring now to Figures 3, 4 and 5, in addition to Figure 2, the control unit 24 includes a two-part casing com-prised of a back casing section 212 and a front casing section 214. Mounted within the casing and secured to the back casing section 212 are four single-pole double-throw switches 216, 218, 220 and 222, which respe~tively include switch blades 224, 226, 228 and 230 and associated slide buttons 232, 235, 236 and 238.
The pair of switches 216 and 218 are aligned in a first plane, while the pair of switches 220 and 222 are aligned in a second plane perpendicular to the first plane. Disposed centrally of the switches is a preferably H-shaped switch actuator plate 240 having side edges that are engageable with the respective switch buttons. Associated with the actuator 240 is a manually oper-able control knob 242 having a central stem portion 244 and an outer conical wall portion 246. The actuator 240 is secured to the inner end of the stem 244 which projects through an opening _g_ lOSg963 248 formed in the front casing section 214.
The inner edge of the conical wall 246 and the actuator plate 240 are slidable over the outer and inner faces respect-ively of the front casing section 214. The switch blades, and their associated slide buttons, are spring biased to first radially inner positions. The spring biased slide buttons also serve to normally maintain the actuator plate 240 in a central neutral position. The control knob 242 and actuator plate 240 are movable radially outwardly either in line with one of the switches or diagonally relative to an adjacent pair of switches for moving one or any adjacent pair of switch blades from their first positions to second radially outer positions. The swit-ches 216, 218, 220 and 222 are interposed in the electrical circuit of the motors 88 and 124 for controlling energization and direction of rotation of the latter either individually or simultaneously. A multiple conductor coiled cable 250 serves to electrically interconnect the module 22 and unit 24.
The electrical circuit for the remote controlled searchlight of the present invention is shown schematically in Figure 13. In addition to the elec-trical components previously described, diodes 252 and 254 are arranged, in parallel with the limit switches 140 and 142, respectively, for permitting reverse energization of the motor 124 after one of the limit switches has been opened.
When the searchlight is to be used, the switch button 210 of the main switch 208 on the control module 22 (Figure 2~
is first moved either to the left for energizing the spotlight filament of the lamp 100 and conditioning the motors 88 and 124 for operation, or to the right for energizing the flood-light filament of the lamp 100 and conditioning the motors 88 and 124 for operation. Then the control knob 242 of the control unit 24 is manipulated for controlling energization and direc-10599~i3 ion of rotation of the motors 88 and 124.
Referring to Figures 4 and 5, when the switch actuator plate 240 is moved upwardly from its central neutral position, the switch blade 226 is moved from its radially inner position to its radially outer position, the elevation motor 124 is ener-gized for rotation in one direction, and the lamp 100 is pivoted rearwardly toward the dotted line position shown in Figure 12.
As the lamp 100 reaches the dotted line position, the switch actuator 146 (Figure 8~ opens the switch 140 and deenergizes the elevation motor 124.
When the switch actuator plate 240 (Figure 4) is moved downwardly from its central neu~ral position, the switch blade 224 (Figure 5) is moved from its radially inner position to its radially outer position, the elevation motor 124 is energized for rotation in the other direction, and the lamp 100 is pivoted forwardly toward the dotted line position shown in Figure 8. As the lamp 100 reaches the dotted line position, the switch actua-tor 146 (Figure 8) opens the switch 142 and deenergizes the elevation motor 124.
When the switch actuator plate 240 (Figure 4) is moved to the right from its central neutr~l position, the ,switch blade 230 (Figure 5) is moved from its radially inner position to its radially outer position, the azimuth motor 88 is energized for rotation in one direction, and the lamp 100 is rotated in a clockwise direction. Correspondingly, when the switch actuator plate 240 (Figure 4) is moved to the left from its central neu-tral position, the switch blade 228 (Figure 5) is moved from its radially inner position to its radially outer position, the azi-muth motor 88 is energized for rotation in the other direction, and the lamp 100 is rotated in a counter-clockwise direction.
In addition, the actuator plate 240 may be moved (1) diagonally upwardly to the right to jointly actuate the switches 218 and 222 for simultaneously pivoting the lamp 100 rearwardly and rotating it clockwise, (2) dia~onally upwardly to the left to jointly actuate the switches 218 and 220 for simultaneously pivoting the lamp 100 rearwardly and rotating it counter-clock-wise, (3) diagonally downwardly to the left to jointly actuate the switches 216 and 220 for simultaneously pivoting the lamp 100 forwardly and rotating it counter-clockwise, or (4) diagon-ally downwardly to the right to jointly actuate the switches 216 and 222 for simultaneously pivoting the lamp forwardly and rotating it clockwise.
The lamp 100 may be rotated continuously either clockwise or counter-clockwiæe. Also, the lamp 100 may be stopped at any azimuth position, or at any elevation within its range of 120, by simply releasing the control knob. The actuated switch blade ~or blades~ is spring biased back to its radially inner position, and the actuator plate 240 is returned by the switch button (or buttons~ of the actuated switch blade (or blades) to its central neutral position. When the switch blades are in their radially inner positions, the motors 88 and 124 are deenergized. Because the motors are of the permanent magnet-type, when the armatures are shorted by the switches 216, 218, 220 and 222, the motors stop rotating substantially instantaneously thus affording pre-cision control.
As will be appreciated, the azimuth position of the lamp 100 may be readily determined from the remote control module 22 by observing the bulbs 198, 200, 202 and 204. The particular bulb that is illuminated indicates the azimuth quad-rant position of the lamp 100. When the remote control unit 24 is not in use, it is adapted to be snapped on or clipped to the remote control module 22. For certain applications, a single filament lamp may be substituted for the dual filament lamp 100, in which case the main double-pole double-throw switch 208 is replaced with a double-pole single-throw switch.
While there has been shown and described a preferred embodiment of the present invention, it will be understood by those skilled in the art that various rearrangements and modi-fications may be made therein without departing from the spirit and scope of the invention.
BACKGROUND OF THE INVENTION
-The present invention relates to a searchlight which is adapted to be mounted on a support such as a vehicle, which is rotatable about a vertical axis and pivotal about a horizontal axis, and which is controlled from a position remote from its mounting.
The searchlight assembly of the present invention has a base frame, an intermediate frame supported by the base frame and rotatable about a vertical axis, and a lamp frame supported by the intermediate frame and pivotal about a hori-zontal axis. Means are provided for rotating the intermediate frame, and eeparate means are provided for pivoting the lamp frame.
The rotating means includes a gear member secured to the intermediate frame, and a reversible electric (azimuth) motor secured to the base frame and having a drive shaft.
Power transmission means extends between the drive shaft of the azimuth motor and the gear member for rotating the latter.
The intermediate frame, and the lamp frame, are rotatable about a vertical axis continuously in either direction upon appropriate energization of the azimuth motor.
The pivoting means includes linkage means supported by the intermediate frame and having connection with the lamp frame. Actuation of the linkage means, for pivoting the lamp frame, is controlled by a plunger engageable with the linkage means, and a reversible electric (elevation) motor secured to the base frame and having a drive shaft. Power transmission means extends between the drive shaft of the elevation motor and the plunger for axially moving the latter. The lamp frame i5 pivotal about a horizontal axis through a range of 120 upon appropriate energization of the elevation motor.
The electric circuit means of the motors incorporates four switches located in a remote control unit. This unit includes manually operable means for actuating the switches separately or in pairs to control energization and direction of rotation of the motors either individually or simultaneously.
The motors are of the permanent magnet type and.upon deenergization stop immediately thus obviating the need for any braking mechanism. The electric circuit means of the elevation motor incorporates a pair of switches which limit forward or rearward pivoting of the lamp frame by interrupting energization of the elevation motor.
A plurality of azimuth-position-indicating bulbs are located in a remote control module. A plurality of collector ring sectors are supported by the base frame, and are engageable by a brush carried by the intermediate frame. The ring sectors, brush and bulbs are incorporated in electric circuit means. The brush is successively engageable with the ring sectors as the intermediate frame is rotated for energizing one of the bulbs to indicate the azimuth position of the lamp frame and lamp.
Broadly speaking, therefore, in one embodiment the present invention provides a searchlight assembly for an emergency motor vehicle comprising a base frame for mounting on the vehicle, an intermediate frame supported by the base frame and rotatable about a vertical axis, means for rotating the intermediate frame, a lamp frame supported by the intermediate frame and pivotal about a horizontal axis, means for pivoting the lamp frame, a remote unit for mounting within the vehicle, theremote unit including azimuth-position-indicia for indicating the position of the searchlight, a plurality of collector ring sectors carried by the base frame, and a brush càrried by the intermediate frame and successively engageable with the collector ring sectors as the intermediate frame is rotated for energizing the azimuth-position-indicia.
ywl/~ ~ - 2 -BRIEF DESCRIPTION OF TIIE DRAWINGS
Figure 1 is a front elevational view of the search-light assembly of the present invention;
Figure 2 is a front elevational view of the control module and control unit of the present invention;
Figure 3 is a sectional view taken substantially along the line 3-3 in Figure 2 looking in the direction indicated by the arrows;
Figure 4 is a sectional view taken substantially along the line 4-4 in Figure 3 looking in the direction indicated by the arrows;
Figure 5 is a schematic view of the switches incor-- 2a -dap/
~059963 porated in the control unit shown in Figuxes 3 and 4;
Figure 6 is a plan view of the searchlight assembly of Figure 1 with portions of the enclosure means removed;
Figure 7 is a front elevational view corresponding generally to Figure 1 but shows the searchlight assembly with portions of the enclosure means removed;
Figure 8 is a sectional view taken substantially along the line 8-8 in Figure 7 looking in the direction indicated by the arrows;
Figure 9 is a sectional view taken substantially along the line 9-9 in Figure 8 looking in the direction indicated by the arrows;
Figure 10 is a partial elevational view taken substan-tially along the plan 10-10 in Figure 8 looking in the direc-tion indicated by the arrows;
Figure 11 is a sectional view taken substantially along the line 11-11 in Figure 8 looking in the direction indicated by the arrows;
Figure 12 is a partial side elevational view of the searchlight assembly of Figure 1 with portions of the enclosure means removed; and Figure 13 is a schematic view of the electrical circuit of the remote controlled searchlight of the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring now to Figures 1 and 2, the remote controlled searchlight of the present invention comprises a searchlight assembly 20, a control module 22, and a control unit 24. By way of illustration, the searchlight assembly 20 may be mounted on the roof of a vehicle, while the control module 22 is moun-ted on the dashboard of the vehicle.
As shown in Figures 7 and 8, the searchlight assembly ~059963 20 comprises a base frame 26 having an upper horizontal support wall 28. Projecting downwardly from the support wall 28 are a central boss section 30 through which is formed an opening 32, a radially offset boss section 34 through which is formed an opening 36, a plurality of circumferentially spaced-apart leg sections 38, and an interior side wall section 40 united with two end wall sections 42 and 44. Project~ng upwardly from the support wall 28 are a plurality of circumferentially spaced-apart post sections 46, and a plurality of circumferentially spaced-apart columns 48.
Supported by the base frame 26 is an intermediate frame or carriage 50 having an upper horizontal support wall 52.
Projecting downwardly from the support wall 52 is a central hub section 54 through which is formed an opening 56. The hub sec-tion 54 seats on the base frame support wall 28, and is provided with an annular shoulder 58. Extending through the base frame opening 32 and the intermediate frame opening 56 is a bearing sleeve 60 about which the intermediate ~rame 50 is rotatable on a vertical axis. The bearing sleeve 60 is retained in place by snap rings 62 and 64.
Selectively operable means for rotating the intermediate frame 50 comprises a gear member 66 secured to the hub section 54 against the shoulder 58 thereof. Meshing with the gear mem-ber 66 is a pinion 68 secured on the upper end of a pinion shaft 70 journaled in a bushing 72 secured in the base frame opening 36. Secured to the lower end of the pinion shaft 70 is a hub member 74 having a reduced nose section 76 defining an annular shoulder 78. A spur gear or worm wheel 80 is secured on the nose section 76 against the shoulder 78 in frictionally releas-able relationship by means of a conventional slip clutch unit 82. Meshing with the gear 80 is a worm gear 84 secured on the end of the drivé shaft 86 of an electric reversible permanent magnet (azimuth) motor 88 seaured to the ~ase frame side wall 40 (Figure 12). The intermediate frame 50 can be rotated about a vertical axis continuously in either direction upon appro-priate energization of the azimuth motor 88.
As shown in Figures 7, 8 and 12, a pair of upright laterally-spaced brackets 90 and 92 are secured to the inter-mediate frame support wall 52. Journaled in the upper ends of the brackets 90 and 92 are opposed stub shafts 94 and 96 pro-vided at the sides of a ring-like lamp frame or holder 98 having a radially offset side portion 99. A sealed beam lamp 100 is releasably mounted within the lamp frame 98 by means of a plura-lity of circumferentially spaced-apart retainer clips 102. The lamp frame 98 and lamp 100 are pivotal about the horizontal axis of the stub shafts 9~ and 96.
Linkage means 104, which is supported by the inter-mediate frame 50 and has connection with the lamp frame 98, is actuatable for pivoting the lamp frame 98 and lamp 100. The linkage means 104 comprises a horizontal shaft 106 journaled at its ends in the intermediate frame brackets 90 and 92. Secured ; 20 to the shaft 106 intermediate of the ends thereof is a lever 108 the free end of which overlies the bearing sleeve 60. Also secured to the shaft 106 is a bellcrank 110; and a link 112 is pivotally connected at its one end to the bellcrank 110 and at its other end to the lamp frame flange portion 99 above the stub shaft 96. Pivotal movement of the lever 108 effects pivot-ing of the lamp frame 98 and lamp 100.
Selectively operable means for controlling actuation of the linkage means 104 comprises a plunger 114 slidably mounted at its upper portion in the bearing sleeve 60. The lower por-tion of the plunger 114 is threaded and has threaded engagement with a threaded sleeve 116 to which is secured a spur gear or worm wheel 118. Meshing with the gear 118 is a worm gear 120 secured on the end of the drive shaft 122 of an electric revers-ible permanent magnet (elevation) motor 124 secured to the base frame side wall 40, parallel to the motor 88.
The upper end of the threaded sleeve 116 bears against a spacer ring 126 which is restrained against upward movement by the bearing sleeve 60, while the lower end of the threaded sleeve 116 bears against a bearing unit 128 which is restrained against downward movement by the horizontal wall of an L-shaped cover member 130 secured to the base frame walls 40, 42 and 44.
Accordingly, the rotatable threaded sleeve 116 is held against vertical movement. Secured to the lower end of the plunger 114 is the one end of a horizontal strap member 132 having an up-wardly directed arm portion 134 which slidably projects through a slot formed in the horizontal wall of the cover member 130.
The strap member 132 and arm 134 serve to restrain the plunger 114 against rotation. By reason of the described mounting of the sleeve 116 and plunger 114, rotation of the sleeve 116 effects vertical movement of the plunger 114.
An elongated coil spring 136 extends between the inter-mediate frame support wall 52 and a lever plate 138 secured to the lamp frame offset portion 99. The spring 136 urges the lamp frame 98 to pivot forwardly, and thereby maintains the free end of the lever 108 in engagement iwth the upper end of the plunger 114 whereby vertical movement of the latter controls actuation of the linkage means 104. When the lamp frame 98 is pivoted rearwardly, the spring 136 engages and bends about the upper end of the bracket 92 thereby to insure an adequate return spring force. In sum, the lamp frame 98 can be pivoted about a horizontal axis either forwardly or rearwardly upon appropriate energization of the elevation motor 124. To achieve balanced pivoting, the center of gravity of the lamp frame 98 and lamp 100 is located approximately on the axis of lOS9963 the stub shafts 94 and 96.
The lamp frame 98 is adapted to be pivoted within a range of 120, that is, between a position 30 forwardly of vertical where the beam of light from the lamp 100 is directed 30 downwardly, and a position 90 rearwardly of vertical where the beam of light from the lamp 100 is directed straight up-wardly. The extreme limits of the indicated range of pivoting are established by a pair of switches 140 and 142 which are interposed in the electrical circuit of the elevation motor 124 and which are secured to a bracket 144 mounted on the side of the base frame end wall 44. The normally closed switches 140 and 142 are arranged to be opened by a generally C-shaped switch.
actuator 146 secured to the outer end of the strap member 132.
As the plunger 114 moves downwardly and the lamp frame 98 is pivoted to a position 30 forwardly of its vertical position, the upper leg of the switch actuator 146 engages one arm of the switch 140 and separates the same from the adjacent arm thus opening the switch 140 and interrupting energization of the elevation motor 124. Conversely, as the plunger 114 moves upwardly and the ;amp frame 98 is pivoted to a position 90 rearwardly of its vertical position, the lower leg of the switch actuator 146 engages one arm of the switch 142 and separates the same from the adjacent arm thus opening the switch 142 and inter-rupting energization of the elevation motor 124.
To accommodate energization of the lamp 100 and unlimi-ted rotation of the latter in either direction, and to furnish an indication of the rotative position of the lamp 100 as will be described more fully hereinafter, a collector ring unit 148 is mounted intermediate of the base frame support wall 28 and the intermediate frame support wall 52. The collector ring unit 148 cor.prises an insulator panel 150 secured to the base frame post sections 46. Suitably affixed to the panel 150, as shown in Figure 11, are an inner collector ring 152 engaged by a brush 154, an intermediate collector ring 156 engaged by a brush 158, and four outer collector ring sectors 160, 162, 164 and 166 engageable by a brush 168. The brushes 154, 158 and 168 are respectively mounted in brush holders 170, 172 and 174 (Figures 6 and 9) secured to the intermediate frame support wall 52.
The lamp 100 preferably is of the dual-filament type which includes a spotlight filament and a floodlight filament.
As shown in Figure 10, the rear of the lamp 100 is provided with a spotlight terminal 176, a floodlight terminal 178, and a common terminal 180. Appropriate electrical leads extend from the terminals 176 and 178 to the brushes 154 and 158, respectively. Also, appropriate electrical leads extend from the several collector rings and sectors, the azimuth motor 88, the limit swit~hes 140 and 142 and a common ground to a socket 182 (Figure 7). As shown in Figure 1, the searchlight assembly 20 includes enclosure means for sealing the same against dirt, water and the like, and for preventing interference with motion of the lamp 100. The enclosure means comprises a bottom pan-shaped member 184 secured to the lower ends of the base frame leg sections 38, an upper transparent dome member 186 resting on the base frame columns 48, an intermediate generally annular member 188 extending vertically between the members 184 and 186, and a retaining ring 190.
Referring again to Figure 2, the control module 22 com-prises a casing 192 having a front panel 194 formed with four circumferentially spaced apart apertures 196 behind which are mounted azimuth-positioning-indicating bulbs 198, 200, 2~2 and 204. These bulbs are electrically connected respectively with the collector ring sectors 160, 162, 164 and 166. As the intermediate frame 50 is rotated, the brush 168 successively losas63 engages the collector ring sectors whereby the bulk correspond-ing to the brush-engaged ring sector is energized for indicating the azimuth quadrant position of the intermediate frame 50, lamp frame 98 and lamp 100.
The control module panel 194 is also formed with an opening 206 in which a main double-pole double-throw switch 208 is mounted. The switch 208 includes a manually operable rocker button 210 having a center switch-open position. Movement of the button 210 to the left effects energization of the spot-light filament of the lamp 100, while movement of the button 210 to the right effects energization of the floodlight filament of the lamp 100. In either the right or left position of the but-ton 210, the motors 88 and 124 are also conditioned for opera-tion. A suitable multiple conductor cable (not shown) serves to electrically connect sockets at the rear of the module casing 192 with the searchlight assembly socket 182.
Referring now to Figures 3, 4 and 5, in addition to Figure 2, the control unit 24 includes a two-part casing com-prised of a back casing section 212 and a front casing section 214. Mounted within the casing and secured to the back casing section 212 are four single-pole double-throw switches 216, 218, 220 and 222, which respe~tively include switch blades 224, 226, 228 and 230 and associated slide buttons 232, 235, 236 and 238.
The pair of switches 216 and 218 are aligned in a first plane, while the pair of switches 220 and 222 are aligned in a second plane perpendicular to the first plane. Disposed centrally of the switches is a preferably H-shaped switch actuator plate 240 having side edges that are engageable with the respective switch buttons. Associated with the actuator 240 is a manually oper-able control knob 242 having a central stem portion 244 and an outer conical wall portion 246. The actuator 240 is secured to the inner end of the stem 244 which projects through an opening _g_ lOSg963 248 formed in the front casing section 214.
The inner edge of the conical wall 246 and the actuator plate 240 are slidable over the outer and inner faces respect-ively of the front casing section 214. The switch blades, and their associated slide buttons, are spring biased to first radially inner positions. The spring biased slide buttons also serve to normally maintain the actuator plate 240 in a central neutral position. The control knob 242 and actuator plate 240 are movable radially outwardly either in line with one of the switches or diagonally relative to an adjacent pair of switches for moving one or any adjacent pair of switch blades from their first positions to second radially outer positions. The swit-ches 216, 218, 220 and 222 are interposed in the electrical circuit of the motors 88 and 124 for controlling energization and direction of rotation of the latter either individually or simultaneously. A multiple conductor coiled cable 250 serves to electrically interconnect the module 22 and unit 24.
The electrical circuit for the remote controlled searchlight of the present invention is shown schematically in Figure 13. In addition to the elec-trical components previously described, diodes 252 and 254 are arranged, in parallel with the limit switches 140 and 142, respectively, for permitting reverse energization of the motor 124 after one of the limit switches has been opened.
When the searchlight is to be used, the switch button 210 of the main switch 208 on the control module 22 (Figure 2~
is first moved either to the left for energizing the spotlight filament of the lamp 100 and conditioning the motors 88 and 124 for operation, or to the right for energizing the flood-light filament of the lamp 100 and conditioning the motors 88 and 124 for operation. Then the control knob 242 of the control unit 24 is manipulated for controlling energization and direc-10599~i3 ion of rotation of the motors 88 and 124.
Referring to Figures 4 and 5, when the switch actuator plate 240 is moved upwardly from its central neutral position, the switch blade 226 is moved from its radially inner position to its radially outer position, the elevation motor 124 is ener-gized for rotation in one direction, and the lamp 100 is pivoted rearwardly toward the dotted line position shown in Figure 12.
As the lamp 100 reaches the dotted line position, the switch actuator 146 (Figure 8~ opens the switch 140 and deenergizes the elevation motor 124.
When the switch actuator plate 240 (Figure 4) is moved downwardly from its central neu~ral position, the switch blade 224 (Figure 5) is moved from its radially inner position to its radially outer position, the elevation motor 124 is energized for rotation in the other direction, and the lamp 100 is pivoted forwardly toward the dotted line position shown in Figure 8. As the lamp 100 reaches the dotted line position, the switch actua-tor 146 (Figure 8) opens the switch 142 and deenergizes the elevation motor 124.
When the switch actuator plate 240 (Figure 4) is moved to the right from its central neutr~l position, the ,switch blade 230 (Figure 5) is moved from its radially inner position to its radially outer position, the azimuth motor 88 is energized for rotation in one direction, and the lamp 100 is rotated in a clockwise direction. Correspondingly, when the switch actuator plate 240 (Figure 4) is moved to the left from its central neu-tral position, the switch blade 228 (Figure 5) is moved from its radially inner position to its radially outer position, the azi-muth motor 88 is energized for rotation in the other direction, and the lamp 100 is rotated in a counter-clockwise direction.
In addition, the actuator plate 240 may be moved (1) diagonally upwardly to the right to jointly actuate the switches 218 and 222 for simultaneously pivoting the lamp 100 rearwardly and rotating it clockwise, (2) dia~onally upwardly to the left to jointly actuate the switches 218 and 220 for simultaneously pivoting the lamp 100 rearwardly and rotating it counter-clock-wise, (3) diagonally downwardly to the left to jointly actuate the switches 216 and 220 for simultaneously pivoting the lamp 100 forwardly and rotating it counter-clockwise, or (4) diagon-ally downwardly to the right to jointly actuate the switches 216 and 222 for simultaneously pivoting the lamp forwardly and rotating it clockwise.
The lamp 100 may be rotated continuously either clockwise or counter-clockwiæe. Also, the lamp 100 may be stopped at any azimuth position, or at any elevation within its range of 120, by simply releasing the control knob. The actuated switch blade ~or blades~ is spring biased back to its radially inner position, and the actuator plate 240 is returned by the switch button (or buttons~ of the actuated switch blade (or blades) to its central neutral position. When the switch blades are in their radially inner positions, the motors 88 and 124 are deenergized. Because the motors are of the permanent magnet-type, when the armatures are shorted by the switches 216, 218, 220 and 222, the motors stop rotating substantially instantaneously thus affording pre-cision control.
As will be appreciated, the azimuth position of the lamp 100 may be readily determined from the remote control module 22 by observing the bulbs 198, 200, 202 and 204. The particular bulb that is illuminated indicates the azimuth quad-rant position of the lamp 100. When the remote control unit 24 is not in use, it is adapted to be snapped on or clipped to the remote control module 22. For certain applications, a single filament lamp may be substituted for the dual filament lamp 100, in which case the main double-pole double-throw switch 208 is replaced with a double-pole single-throw switch.
While there has been shown and described a preferred embodiment of the present invention, it will be understood by those skilled in the art that various rearrangements and modi-fications may be made therein without departing from the spirit and scope of the invention.
Claims (5)
OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A searchlight assembly for an emergency motor vehicle comprising a base frame for mounting on the vehicle, an intermediate frame supported by said base frame and rotatable about a vertical axis, means for rotating said intermediate frame, a lamp frame supported by said intermediate frame and pivotal about a horizontal axis, means for pivoting said lamp frame, a remote unit for mounting within the vehicle, said remote unit including azimuth-position-indicia for indicating the position of the searchlight, a plurality of collector ring sectors carried by said base frame, and a brush carried by said intermediate frame and successively engageable with said collector ring sectors as said intermediate frame is rotated for energizing said azimuth-position-indicia.
2. In combination: a searchlight assembly for an emergency motor vehicle comprising a base frame, an intermediate frame supported by said base frame and rotatable about a vertical axis, means including a reversible electric motor for rotating said intermediate frame, a lamp frame supported by said intermediate frame and pivotal about a horizontal axis, a lamp carried by said lamp frame, means including a reversible electric motor for pivoting said lamp frame, a plurality of collector ring sectors supported by said base frame, and a brush carried by said intermediate frame being engageable with said collector ring sectors; a remote control module comprising a plurality of azimuth-position-indicating bulbs; a remote control unit comprising four switches and manually operable means for actuating said switches; electric circuit means incorporating said collector ring sectors, said brush, said bulbs, said motors and said switches; said brush being successively engageable with said collector ring sectors as said intermediate frame is rotated for selectively energizing said bulbs; and said manually operable means being arranged to actuate any one or any adjacent pair of said switches to control energization of said motors.
3. The searchlight assembly of claim 1 wherein said means for rotating said intermediate frame includes a first selectively energizable electric motor; said means for pivoting said lamp frame includes a second selectively energizable electric motor coupled to said lamp frame; said assembly further comprising linkage means supported by said intermediate frame and being actuable for pivoting said lamp frame, said linkage means including a horizontal shaft carried by said intermediate frame, a lever secured to said shaft and having a free end adapted for movement in response to actuation of said second electric motor, a bell crank secured to said horizontal shaft, and a link pivotally connected at one end thereof to said bell crank and at its other end to said lamp frame.
4. The searchlight assembly of claim 3 in which the free end of said lever is engageable with a plunger, and includ-ing means coupling said plunger to the drive shaft of said second electric motor for axially moving said plunger to control move-ment of said lever.
5. A searchlight assembly as described in claim 4, including a pair of limit switches mounted on said base frame, electric circuit means incorporating said second electric motor and said limit switches, and a switch actuator movable with said plunger for cooperation with one or the other of said switches when said lamp frame pivots to a predetermined position about its horizontal axis, to interrupt energization of said second electric motor.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US62892475A | 1975-11-05 | 1975-11-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1059963A true CA1059963A (en) | 1979-08-07 |
Family
ID=24520873
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA261,635A Expired CA1059963A (en) | 1975-11-05 | 1976-09-21 | Remote controlled searchlight |
Country Status (6)
| Country | Link |
|---|---|
| AU (1) | AU505059B2 (en) |
| BR (1) | BR7607216A (en) |
| CA (1) | CA1059963A (en) |
| FR (1) | FR2330957A1 (en) |
| IT (1) | IT1074734B (en) |
| MX (1) | MX3338E (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2575802B1 (en) * | 1985-01-10 | 1987-02-06 | Universal Technic | ADJUSTABLE SUPPORT, ESPECIALLY FOR A PURSUIT PROJECTOR MIRROR |
| DE3829808A1 (en) * | 1987-09-03 | 1989-04-06 | Waldemar Plessmann | Operating device for a surgical lamp |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1065216A (en) * | 1951-08-11 | 1954-05-21 | Onera (Off Nat Aerospatiale) | High precision device for instantaneous reading and transmission of variable angles |
| US2754411A (en) * | 1954-03-23 | 1956-07-10 | Otto Dohrmann | Remote control spotlight |
| US3176268A (en) * | 1962-12-07 | 1965-03-30 | Meyer Irving Stanley | Emergency warning system |
-
1976
- 1976-09-21 CA CA261,635A patent/CA1059963A/en not_active Expired
- 1976-10-05 AU AU18371/76A patent/AU505059B2/en not_active Expired
- 1976-10-11 IT IT51672/76A patent/IT1074734B/en active
- 1976-10-19 MX MX100325U patent/MX3338E/en unknown
- 1976-10-20 FR FR7631578A patent/FR2330957A1/en active Granted
- 1976-10-27 BR BR7607216A patent/BR7607216A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| FR2330957A1 (en) | 1977-06-03 |
| IT1074734B (en) | 1985-04-20 |
| BR7607216A (en) | 1977-09-13 |
| AU1837176A (en) | 1978-04-13 |
| MX3338E (en) | 1980-09-29 |
| FR2330957B1 (en) | 1982-05-14 |
| AU505059B2 (en) | 1979-11-08 |
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