Патент USA US2406340код для вставки
Aug. 27, 1946. 2,406,340 L. BATCHELDER I ELECTRIC GOMPENSATOR Original Filed Oct. 12,‘ 1939 - > = T T T 14544; X0 4’; i‘ LI ?HAe I 26/ ' '2 Sheets-Sheet l 4/2 _ 29 27/ /Z4- 1 INVENTOR. BY LAURENCE/BATCHE E£1’ _ a‘ V I: . _ ‘ATTORNEY Patented Aug. 27, 1946 2,406,340 UNITED STATES PATENT OFFICE 2,406,340 ' ELECTRIC COMPENSATOR Laurence Batchelder, Cambridge, Mass., assignor to Submarine Signal Company, Boston, Mass, a corporation of Maine Original application 0ctobe1:12,.1939, Serial No. 299,180, now abandoned. Divided and this ap plication December 5, 1940, Serial No. 368,656 3 Claims. 1 The'present application is a division of my co pending application Serial No. 299,180, ?led Oc tober 12, 1939, now abandoned. (Cl. 177-386) 2 inductances having mutual inductance between the two parts of their windings, as provided, for example, by common iron cores as shown. The present invention relates to electric com The center taps I8 and I9 lead respectively to pensators particularly to such as are used for the inputs of the transformers 28 and 29, the the determination of the direction of subma transformer secondaries being connected across rine sound sources. For this purpose a plurality the binaural or B-line as shown. The output of of electroacoustic transducers for producing elec the B-line is connected to the telephone indi trical response upon excitation by compressional cators 36 and 3?. The B-line switch, here shown waves are mounted at spaced positions in a pre 10 schematically, is more fully described in my prior determined con?guration. A wave impulse ar United States Patents Nos. 2,070,570 and 2,088,580. riving from a distant source will, therefore, strike It will now be understood that compressional the several transducers or receivers at different wave energy striking the receiving devices I will instants of time whereby the electrical currents cause them to produce electrical currents ‘having or voltages produced by the said devices will 15 a phase difference depending upon the time of vary in time phase depending upon the angle arrival of the sound energy at the several receiv which the direction of the sound source makes ers. The maximum lines by means of the switches with the surface upon which the receivers are make it possible to bring the energy from the mounted. By progressively varying the phases individual units of the two groups of receivers of the several electric impulses so produced in 20 into phase. The energy from the two groups of such a manner as to bring them all into phase, receivers is then impressed upon the B-line. The the direction of the sound source can be deter energy from the left group of receivers passes mined by noting the amount of phase variation through the left portion of the B-line while that required. For'this purpose adjustable electrical from the right group of receivers passes through retardation lines are commonly employed. These 25 the right portion of the B-line. are frequently divided into two parts, the bi The maximum line switches comprising the naural or B-line and the maximum lines. The brushes I2 and I3 and the auto transformer present invention relates particularly to a max I6 for the left line as seen in Fig. 1 and the imum-line switch. brushes I4, I5 and auto transformer I‘! for the The invention will best be understood with right line make possible substantially perfect mid reference to the accompanying drawings in series terminations for both parts of each of the which Fig. l is a schematic diagram of an elec maximum lines without the necessity of provid tric compensator in accordance with the present ing center taps in the series inductances of the invention, and Fig. 2 is a development of one of lines. One of these switches is shown in greater the maximum line switches in accordance with 35 detail in the development present in Fig. 2. A the present invention. portion of the retardation line comprising the in Referring to Fig. 1, four compressional wave ductances 9 and the capacitances I 0 is shown for receiving devices I are shown. These all have one six different positions of the brushes. The con lead connected to a common conductor 2. The tact studs I I connected to the terminals of the other terminals of the left pair of receivers are 40 inductances 9 and the two movable brushes I2 connected to the input of the left maximum line and I3 which are connected to the terminals of 3 at 4 and 5, while the right pair of receivers the auto transformer I6 having the center tap l8 is connected to the input of the right maximum are shown in their true relative sizes and spaces line 6 at ‘I and 8. The lines 3 and 6 are electric which they must have in order that the transi retardation lines of recurrent sections formed of 45 tions be equally spaced. inductances 9 in series and capacitances I 0 in To this end it is necessary that the transitions shunt as heretofore used in the art. The ends of each brush from one stud to the next be in of the lines are terminated by additional capac stantaneous and that the transitions be equally itors as shown to provide perfect midshunt ter spaced as the brushes move along the studs. If mination. The junction of the series inductances 50 we let the width of the studs be represented by are connected to contact studs II of the maxi mum line switches each of which includes a pair of movable brushes I2, I3 and I4, I5, respectively. These are connected to the terminals of the cen S, the width of the brushes by b, and the pitch of the studs by P, the transitions will be instan taneous if b=P_s (1) ter tapped auto transformers I 6 and I1, respec 55 tively. The auto transformers are center tapped In practice it is not essential that the brushes 2,406,340 themselves be made of exactly the correct width but they can be made wider than the required value and bevelled at their edges. In order to make the transitions equally spaced, it is evi dent from Fig. 2 that 4 both ends of the line are again terminated in a mid-shunt manner as in position 1. \ Having now described my invention, I claim: 1. In an electric compensator having an elec tric retardation line formed of a plurality of re currentsections of inductive series elements and capacitive shunt elements, means for effectively (2), , connecting to the electrical center of one of said inductive elements comprising a center-tapped where B is the total span of the two brushes.’ 10 auto transformer and means for connecting the same in, parallel with said inductance element. Hence ‘ '2. Inpan electric compensator having an elec tric retardation‘line formed of a plurality of re (3) ' current sections of inductive series elements and From Equations 1 and 3 it follows that the 15 capacitive shunt elements, an auto transformer transitions will be equally spaced if ' having a’, center, tap and two terminals and switch means 'for progressively connecting said terminals to the extremities of one of said in ductances, then both terminals to the junction 20 between the latter inductance and next adjacent The progressive position of the brushes as they inductance, then to the extremities of the last are advanced over the studs is shown in Fig. 2. In position lboth brushes l2 and H! are in‘ con tact with a single stud so that the lead 18 is ef mentioned inductance and so on. ' ' 3. In an electric compensator having an elec tric retardation line formed of a plurality of re fectively directly connected to- the line at the 25 current sections of inductive series elements and junction of two series elements. Both ends of capacitive shunt elements, a switch mechanism the line are thereby terminated in a mid-shunt including ?rst contact members connected be tween adjacent series elements, an auto trans former having a center-tapped Winding, a pair to the right with the brush l3 in a transition po- -30 of second contact members one connected to sition between one stud and the next. 'In posi each extremity of said transformer, means tion 3 the brush I3 has completed contact with mounting both ?rst and second contact members the next stud while the brush’ I2 is still in con in cooperative relation to each other and so ar manner. In position 2 both the brushes have advanced tact with the preceding stud. The auto trans ranged that the space between adjacent ?rst former I6 is thereby shunted across one of the 35 contact members is the eifective width of each inductances 9. The center tap l8 is therefore ef of the second contact members and the total fectively connected to the center of the element span of the two second contact members less the 9 whereby both ends of the line are terminated width of one of them is one half the distance be in a mid-series manner. In position 4, the tween corresponding edges of adjacent ?rst con brushes have moved a further increment to the tact members, and means for moving the second right, while in position 5 the brush I2 is in the contact members relatively to the ?rst. transition position. In position 6 both brushes l2 and. I3 are in contact with the next stud and LAURENCE BATCHELDER.