Патент USA US2406999код для вставки
33~238. (HR> 2 a 406 9 999 Sept. 3, 1946. F. w. DURGIN _- 2,406,999 CONTINUOUS RANGE FINDER Filed April 23, 1943 - IINVENTOR' 3m M @myim win,\ OUGE ‘UH HUJUHI i Patented Sept. 3, 1946 2,406,999 UNITED STATES PATENT OFFICE 3 2,406,999 CONTINUOUS RANGE FINDER Franklin W. Durgin, Washington, D. 0. Application April 23, 1943, Serial No. 484,279 4 Claims. (Cl. 33-—49) 2 1 This invention relates to improvements in tinuous range ?nders and more speci?cally gun-coupled range ?nder particularly adapted for anti-aircraft use. The primary object of the invention is to The rotatable light de?ector I2 is directly con nected to the shaft of a suitable rheostat 2|. con to a well pro Attached to the gun A is a solenoid 22, in series iii vide a gun-coupled range ?nder which will au circuit with the rheostats I8, 20 and 2|, the ar mature 23 of the solenoid being fastened to the longitudinal sight member I4. A suitable source of current 24 is provided in the circuit, as shown in Figure 3. The rheostats I8, 20, and 2| have resistances tomatically maintain the range ?nder at the proper angle to the gun when the gun is proper ly rotated and the range ?nder is properly fo cused on a moving target, such as an airplane. 10 which are so related to the factors of aircraft Other objects and advantages of the invention speed, angular elevation, and aircraft distance, that the current in the circuit is varied in re will become apparent during the course of sponse to changes in the speed, angular eleva the following detailed description, taken in con tion, and distance of an approaching aircraft nection with the accompanying drawing, form ing a part of this speci?cation, and in which whereby the solenoid will dispose the sight mem drawing, ber M in proper angular relation to the gun A, Figure 1 is a diagrammatic side view of the gun-coupled range ?nder focused on an air which is angularly rotated, as by the gunner, at a rate just su?icient to retain the images of the approaching aircraft in the range ?nder B. plane in ?ight. Figure 2 is a diagrammatic plan view of the 20 As the speed indicating shaft of the speedome ter l6 turns responsive to apparent or actual gun-coupled range ?nder. increase in speed of the aircraft, the shaft of the Figure 3 is a diagrammatic view of an electri rheostat I8 is automatically turned so as to in cal circuit preferably forming a part of the in crease the current ?ow through the solenoid 22, vention. ~ In the drawing, which for the purpose of il 25 whereby the angularity between the gun and sight member I4 is increased. lustration shows only a preferred form of the in As the sight member l4 turns toward the ver vention, and wherein similar reference charac tical, the shaft of the rheostat 20 is gradually ters denote corresponding parts throughout the turned to reduce the current flow so as to com several views, the letter A generally designates the gun, to which is coupled the range ?nder B, 30 pensate for any advancement of the rheostat , I8 that is due to apparent but not actual increase focused on a moving target, such as the air in speed of the approaching aircraft, it being un— plane C. ‘ derstood that the sight member I4 is accelerated Any suitable range ?nder B, such as shown in as it approaches the vertical when the speed of U. S. Patent #279,273 to Patterson or #1,968,002 to Nowicki et al., may be employed. There is dis 35 the aircraft is constant. As the light de?ector I2 is turned or otherwise posed, in alignment with the axis IU of elevation controlled by the gunner to retain the dual im of the gun A, the lateral sight member ll of the ages of the approaching aircraft in proper align range ?nder B having a conventional rotatable ment in the range ?nder B, the shaft of the rheo light de?ector l2, constituting the movable com ponent of the range ?nder. A semi-transparent 40 stat 2| is automatically turned to increase the current flow through the solenoid, whereby the mirror l3 disposed at an angle of 45° within the angularity between the gun A and the sight mem longitudinal sight member M at the intersection ber I4 is increased. of the lateral sight member |l constitutes the ?xed component of the range ?nder. - Any suitable motion transmitting means, such as a belt I5, is provided between the axis of ro Thus, the relationship of the sight member M 45 to the gun A depends on the speed, angle of ele vation, and distance of the‘approaching aircraft C relative to the location of the gun A. tation of the range ?nder and the drive shaft of Various changes may be made in the form of a speedometer I8 whose speed indicating shaft invention herein shown and described without de is connected, as by a belt H, to the shaft of a 50 parting from the spirit of the invention or the suitable rheostat [8. scope of the following claims. Any suitable motion transmitting means, such I claim: as a belt I9, is provided between the axis of ro 1. The combination with a gun rotatable about tation of the range finder B and the shaft of a a given axis, of a range ?nder mounted for ro suitable rheostat 20. 55 tation about the axis of rotation of the gun, said 2,406,999 4 3 range ?nder provided with a movable distance indicating element, a single power actuated means for controlling the angular relationship a given axis, of a range ?nder rotatable about the axis of rotation of the gun, said range ?nder be ing adjustable for target distance, a single power actuated means controlling the angular relation of the gun and range ?nder substantially in ac cordance with the amount of power actuating said 5 ship of the range ?nder to the gun substantially in accordance with the instantaneous value of the control means, a source of energy for actuat ing said control means, a speedometer driven by rotation of the range ?nder, and plural jointly power actuating said control means, a source of energy actuating said control means, and plural jointly acting means varying the amount of en acting means for varying the amount of energy delivered to said control means including means 10 ergy delivered to said control means including means responsive to changes in the target-dis controlled by said speedometer, means controlled tance adjustment of the range ?nder. by said movable element, and means responsive to 4. The combination with a gun rotatable about changes in the angular position of the range a given axis, of a range ?nder rotatable about an ?nder. 2. The combination with a gun rotatable about 15 axis extending in the direction of the said axis a given axis, of a range ?nder mounted for ro- - _of rotation of the gun, said range ?nder pro~ tation about the axis of rotation of the gun, said mventyqa ‘solenoid, a source of current energizing range ?nder provided with a movable element the solenoid, said solenoid controlling the angular for adjustment to a position indicative of the distance to the target,’ an electro-motive device '20 relationship of the range ?nder to the gun sub stantially in accordance with the amount of en for controlling the angular relationship ‘of the ergy supplied to the solenoid, a speedometer, gun and range ?nder substantially in accordance means driving the speedometer at a rate depend~ With the amount of energy actuating said device, ‘ing on the rate of rotation of the range ?nder, a source of current for actuating said electro motive device, a’speedgmeter driven by rotation 25 and a plurality of serially connected ‘impedance; for regulating the ?ow of current from said source of the range ?nder, Miami-n51 "jointly acting to said solenoid and including a, rheostat con means for regulating thefliow of ‘current from trolled by said speedometer, a rheolstat controlled said source to said electro-motive device com p'dedntMigq?llkl?lg????lgglldingeele .prising means controlled by said speedometer, by movement of said distance-?nding element, means controlled by said movable element, and 30 ‘and a rheostat responsive to changes in the angu lar position of the'range ?nder. means responsive to changes in the angular po ) sition of said range ?nder. . 3. The combination with a gun rotatable about FRANKLIN W. DURGIN.