US2624795A

US2624795A - Selector for automatic phonographs

Info

Publication number: US2624795A
Application number: US127458A
Authority: US
Inventors: Albinus G Bodoh
Original assignee: SEEBURG J P CORP
Current assignee: J P SEEBURG Corp; SEEBURG J P CORP
Priority date: 1949-11-15
Filing date: 1949-11-15
Publication date: 1953-01-06
Anticipated expiration: 1970-01-06

Description

3 Sheets-Sheet l 3 5 5 Q h 7 4o 5 M W t 5 J & Y 1H R E M y w 1 MG M Fm- IL 6 5 E 0 1 1 5 h 5 U 3 VIII-1.. In A 4 h fi 2 Q on Jan. 6, 1953 A. G. BODOH SELECTOR FOR AUTOMATIC PHONOGRAPHS Filed Nov. 15, 1949 Jan. 6, 1953 BODOH 7 2,624,795

SELECTOR FOR AUTOMATIC PHONOGRAPHS Filed Nov. 15, 1949 3 Sheets-Sheet 2 INVENTOR ATTORNEY Jan. 6, 1953 A. 5. BQDOH 2,624,795

SELECTOR FOR AUTOMATIC PHONOGRAPHS Filed Nov. 15, 1949 3 Sheets-Sheet 5 INVEN TOR #Zz'nzw & Kodak ATTORNEY- Patented Jan. 6, 1953 SELECTOR FOR AUTOMATIC PHONOGRAPHS Albinus G. Bodoh, Glenview, Ill., assignor to J. P.

Seeburg Corporation, Chicago, 111., a corporation of Illinois Application November 15, 1949, Serial No. 127,458

11 Claims. 1

This invention relates to selectors for'automatic phonographs and particularly to stepping mechanism which is adapted to receive any of a large number of two trains of impulses and in response thereto, to energize two circuits to effect selecting of a recording corresponding individually to the two trains.

Patent N0. 2,489,782, issued November 29, 1949 to Herman G. Jensen and co-pending application Serial No. 127,459, filed November 15, 1949, by Herman G. Jensen describe and claim mechanisms for supplying such trains of impulses and 'co-pending application Serial No. 117,389, filed September 23, 1949, by Herman G. Jensen describes and claims a two circuit selecting mechanism which may suitably be energized by the device of the present invention.

The principal object of the present invention is to provide an improved stepping mechanism of the type referred to.

The other objects, advantages and capabilities of the invention will appear from the following description thereof taken in conjunction with the accompanying drawings in which:

Figure I is a wiring diagram of an impulse actuated selecting mechanism embodying the present invention;

Fig. 2 is a similar View illustrating a modified form of the invention;

Fig. 3 is a plan View showing the mechanical structure of part of the device embodying the present invention; and

Fig. 4 is a vertical section of this mechanical structure, the section being taken on the line 4--4 of Fig. 3.

Referring more particularly to Fig. 1, it is to be noted that the essential parts of the impulse creating mechanism of the first mentioned application are shown as two sets of contacts 15 and I6 and an arm H which is arranged to pass over them for each selecting operation. The contacts of each set are regularly spaced and they are separated by a larger space which may be about three times the contact spacing. All the contacts are normally connected to the impulser line 18 which leads to the phonograph."The impulser circuit normally includes the impulser line 18, all the contacts 15 and 7G and the movable arm 11. Means including two sets of push buttons are provided to cut a desired number of contacts of each set out of the impulser circuit so as to create a large number of two train selecting signals. With two sets of ten buttons, 100 signals may be created. In this remote control, there are provided one set of 21 contacts and a second set of release relay 43.

contacts. One set of buttons cuts out any numher up to 9 of the first set of contacts and the other set of buttons cuts out any number up to 4 of the second set of contacts. Furthermore, the last 11 of the first set of contacts are sub-tended by a large contact 19 which can be connected and disconnected to the impulser circuit. Consequently, 100 double trains from 2-1 to 21-5 impulses can be transmitted. Where the first train transmits between 2 and 11 impulses, the large contact 79 is connected so that the last of these impulses is a long impulse. The reason why a minimum of two impulses is included in the first train will hereinafter appear.

Referring to Fig. 1, it will be understood that each impulse is created by the grounding of the line 18. This line is connected to the grid of a tetrode 3| through a relatively low resistor 32 and to the negative side of a rectifier 33 through a very high resistor 34 and a lesser resisto 35. Normally, the negative voltage applied to the grid of the tube 3| biasses the tube below cut-off so that no current flows. When, however, the line 18 is grounded to create an impulse, the negative bias of the grid of the tube 3| is removed and plate current flows through a small resistor 36, normally closed switch 31 and the first stepping relay 38. The tube 3| may suitably be a 2050 gas filled tetrode. This stepping relay moves the contact 39 one step and momentarily closes the two normally open switches 40 and 4|. Closing of the switch 40 energizes the slow release relay 4'2 and closing of the switch 4| energizes the slow Slow release relay 42 is connected to the ungrounded side of the rectifier 33 and when the switch 40 closes, its other side is connected to ground. The relay 42 is slugged so that it remains energized for slightly longer than the period between successive impulses of the first train. The relay 43 is likewise connected to the ungrounded side of the rectifier 33 and when the switch 4 I, or the switch 44 is closed, its other side is grounded. It is required that the relay 43 remain energized not only between the successive impulses of each train,-but also during the longer period between the two trains. Consequently, I

provide a CR circuit in parallel with the relay 43 to give this much slower release. The relay 43,

when energized, releases dogs which hold the two contacts 39 and 45 in the position into which they are stepped by two trains of impulses. It is to be noted that when the relay 42 is energized, the normally closed switch 46 is opened and the normally open switch 41 is closed. The second impulse of the first series brings the contact 39 into engagement with a contact which is connected to a conductor I. At the end of the second impulse, a cam 43 movable with the contact 39 closes the switch 49 and opens the switch 31. The third and succeeding impulses of the first train now pass through switch 49, switch 41, which is now closed, and through the first stepping relay 38 as before. Thus, the first train of impulses moves the contact 39 into an individual position which depends u on the number of impulses in that train. Thus, 11 impulses in the first train will move the contact 39 into contact with the contact connected to conductor It]. At the end of the first train of impulses, the re ay 42 becomes deener ized, opening the switch 41 and closing the switch 46. The relay 43 remains energized until the second train of impulses is rece ved.

It may here be noted that the reason why a minimum of two impulses is in cluded in the first train is to insure at least two closin s of the switch 4! which is sufiicient to char e the condenser of the CR, circuit in arallel with the relay 43 to insure that this relay remains ener ized during the period between the two trains. The first impulse of the second train passesthrough the switch 49, switch 43, which is now closed. and the second stepping relay 50. The energization of the relay steps the contact 45 into engagement with its first cont-act which is connected to a conductor 2 I, and also momentarily closes the

switches

44 and 5!. The closing of the s itch 44 during the second train of impulses maintains the relay 4 energi ed and the similar closing of the switch 5i energizes the relay 52. is connected to the ungrounded terminal of the rectifier 33 and its other side is connected through the switch 5| to ground. The relay 52 is slugged so that it remains energized between successive impulses of the second series. while the second series of impulses is being received, the normally closed switch 53 is opened and the normally open switch 54 closes. A circuit is completed from ground, through switch 54 and relay 55 to the ungrounded side of the rectifier 33. Conseouently, the switch 56 becomes closed, but it is to be noted that when this switch closes, the switch 53 has already been opened. One side of the switch 56 is connected to a 26 volt A. C. line. It's other side is connected to one side of the switch 53. The other side of switch 53 is connected to the contacts 39 and 45. The former connection includes a small resistor 51 since the electromagnetic devices to which the lines 2| to are connected have a higher imp-edance than the electromagnetic devices to which the lines I to 2! are connected.

When the second series of impulses terminates, the relay 52 becomes deenergized, closing the switch 53 and opening the switch 54. The relay 55 thereafter becomes deenergized while the relay 43 remains energized owing to its slower release. After the relay 52 is thus deenergized and before the relay 55 becomes deenergized, a circuit is completed from the 26 volt A. C. source through switch 55, switch 53, the contacts 39 and 45 and through the electromagnetic devices to which they are connected owing to their stepped positions. After this impulse has passed through these electromagnetic devices, the relay 43 drops out and the contacts 39 and 45 are freed to re sume their normal positions.

The contact 39 is carried by the cam 48 which is rigidly carried by a shaft 58 which also rigid-1y carries a ratchet wheel 55. A dog 60 is biased One side of the relay 52 Consequently,

4 towards the ratchet wheel 59 and when it is permitted to engage the ratchet wheel 59, it serves to hold this ratchet wheel and the contact 39 in any stepped position. The armature of the stepping relay 38 carries an arm 6| which is arranged to engage the teeth of the ratchet wheel 59 and step it one tooth and contact space each time the relay 38 is energized. The shaft 58 and the elements carried by it including the contact 39, are biased by a spring 62 towards normal position which is defined by stops 63. The contact 45 is mounted on a piece of insulation carried by a shaft 64 which also rigidly carries a ratchet wheel 65. A dog 66 is biassed towards the ratchet wheel 65 and when it is in operative position, it serves to hold the shaft 64 and contact in any position into which they are stepped. The armature of the stepping relay carries an arm 61 which is arranged to engage the ratchet wheel 65 and displace it one tooth and one contact space away from its normal position each time the relay 50 is energized. The shaft 64 and the elements carried thereby including the contact 45 are biassed by a spring 68 towards normal position, which is defined by stops 69. v

The dogs 50 and 56 carry projecting lugs iii, each of which is arranged to be engaged by a spring arm 1!, carried by the armature of the relay 43. When the relay 43 is deenergized, the arms 1| lift the dogs 6!] and 66 away from the ratchet wheels 59 and 65 so that the contacts 39 and 45 are freed to move to their normal zero positions. When the relay 43 is energized, the arms H are moved away from the lugs 10 so that the

dogs

60 and 66 move into cooperative engagement with the ratchet wheels 59 and 65. As has previously been described, the relay 43' become energized during the first impulse received and remains energized until after the-last impulse has been received. Consequently, the

dogs

60 and 66 hold the contacts 39 and 45 in stepped position. The first train of impulses steps the contact 39 into selected position depending upon the number impulses in the first train and the second train of impulses displaces the arm 45 into selected position depending upon the number of impulses in the second train. After the second train of impulses has been received, the relay 52 becomes deenergized and power is supplied through the closed switch 56 and the closed switch 53 to the contacts 39 and 45 so that an actuating surge of current is supplied to the two conductors with which the contacts 39 and 45 are connected. For example, if the first train included 17 impulses, and the second train included 3 impulses, an actuating surge of current would be supplied to conductors l5 and 23. This surge is terminated by deenergization of the relay and thereafter the relay 43 releases so that the arms H lift the dogs and '66 so that the contacts 33 and 45 are returned to their normal zero position by the associated springs 62 and 68.

The'embodiment of the invention just described is suitable for use with the automatic phonograph selector described and claimed in co-pending ap-- plication Serial No. 117,389, filed September 23, 1949, by Herman G. Jensen. This selector includes two rows of elcctnomagnets l2 and since the described device is intended for selections, 100 such magnets 12 are provided, each corresponding to one selection. The lower row of electromagnets 12 in Fig. 1, corresponds, reading from I right to left, to selections Al, A3, A5, A7, A9, Bi,

from the last mentioned application and has its origindn the fact that one setof' selector'buttons is numbered and the other set is. lettered; The letter I is omitted to, avoid confusionwith the No. 1. The upper row-of electromagnets 12 in Fig. 1, corresponds, reading from right to left, to selections A2, A4, A6, AS, All], B2, B4, B3, Bill, C2, C4 and so forth up to Kill. Theconductor l is connected to oneside or electromagnets Ali, CI, El, (3! and J1. Conductor 2 is connected to one side of electromagnets A2, C2, E2, G2 and J2 and so forth. Conducto II is connected to oneside of electromagnets Bl, DI, Fl, HI and Kl. Conductor I 2 is connected to one side of electromagnets 132, D2, F2, H2 and K2 and soforth, conductor 2% being connected to one side of electromagnetsBldDimFidl-llfi andKiO.

The other sides or terminals of the electro magnets are normally disconnected, but are arranged to be engaged by the grounded armatures of 5 electromagnets which aredesignated A-B, CD, E -F, G-I-I, and JK. One side of each of theseelectromagnets is grounded. The other sides of electromagnets A--B, C"-D, EF, (3-H and JK are connected to conductors 2!, 22, 23, 24 and 25 respectively. The armaturcs of the electromagnets AB, C-D, E- F, G-.H and JK individually ground the normally unconnected terminals of the group of electromagnets Alto BIB, C5 to DID, El to Fill, GI to Hill, .and

J I to Kill respectively. It will thus be seen that when an actuating surge of current is supplied to anyone of the conductors I to and any one of the conductors 2! to only one of" the electromagnets l2'will be energized. Thus, returning to the previously'mentioned example, where the first train included 17' impulses and the second train included 3 impulses. an actuating surge of current is supplied to conductors l6 and 23. The surge passing over conductor 23 energizes electromagnet EF and. the surge of current passing over conductor 6 energizes elec-tromagnet FE whose normally unconnected terminal is grounded bythe armature of the electromagnet EF. While the conductor I6 is also connected to electromagnets B6, D6, H6 and KB, these last mentioned electromagnets are not energized because their normally unconnected terminals remain unconnected since electromagnet E-F is the only one of the electromagnets AB to J-K, which is energized.

As is more fully-described in the last mentioned co-pending application, the energization of any one of the electromagnets 12 causes the physical displacement of its individual armature l3 into selecting position and the engagement of this arm with a bar 14 which puts the phonograph motor into operation to effect the playing of the, corresponding record.

The modification of Fig. 2 is also, intended for use in the selection of any of 10.0v recordsbut is arranged'to respond to 100 two train signals in cluding from 2-l to Il-Ill-impulsetrains. Such trains may besupplied by one of the-embodiments of the-invention described andclaimedinPatent No, 2,489,782, issued November 29, 19 49, to Herman G. Jensen. In that application two sets of 12 contacts were provided-to transmit 100 signals of 2-2 to l2-l2 impulses. In the present embodiment only one, extra? contact is provided in the first train, the remote control unit being provided with, two sets of 11 and- 10 contacts respectively. The large contact of the previouslydescribed modification is omitted. The

remote control unitisprovided with means cutting out up to 9 contacts of each set, of contacts toprovide the range of double trains just mentioned. Inthis modification, ten conductors bearingthe numbers I to H) are associated with the contact 39 and ten conductors bearing the numbers 2| to are associated with the contact 45. The first two impulses of the first train bring the contact 39 into engagement with conductor I. The next impulse of the first train brings the contact 39 into engagement with conductor 3 and so forth. The first impulse of the second train brings the contact into engagement with conductor 2!. The next impulse brings the contact 45 into engagement with conductor 22 and so forth. In this modification, 10 electromagnets A, B, C J, K are provided instead of the 5 electromagnets A-B, etc., of the previously described embodiment. The

conductors

2 I, 22, 23, 24, 25, 26, 21, 28, 29 and 30 are connected to electromagnets A, B, C, D, E, F, G, H, J and K, respectively. Conductor I is connected to electromagnets 12'-Al, Bl, Cl Kl. Conductor 2 is connected to electromagnets A2, B2, C2 K2 and so forth,,the conductor I 0 being con nected to el'ectromagnets All], BIB, CID Jill and KM]. When electromagnet A is energized, it grounds the normally unconnected terminals of electromagnets Al to AH). When electromagnet B is energized, it grounds the normally unconnected terminals of the electromagnets Bl to Bill and so forth. When the eleotromagnet K is energized, it grounds the normally unconnected terminals of the electromagnets Kl to KIO.

Here again, when an actuating surge is supplied to-the contacts 39 and 45, only one of the electromagnets 12 is energized. Thus, a double train of' 7 and 5 impulses step the contact 39 into circuit with conductor 6 and the contact 45 into circuit with the conductor 25. The actuating surge through the conductor 25 energizes electromagnet E, grounding the normally unconnected ends. of the electromagnets E! to E10. The actuating surge through conductor 6 energizes the electromagnet E6 so that the corresponding recording is played. While electromagnets A6, B6, C6, D6, F6, G6, H6, J6 and K6 are also connected to conductor 6, none of these is energized because only electromagnet E of the series of electromagnets A to K is energized.

Although the invention has been described in connection with the specific details of a preferred embodiment thereof, it must be understood that such details are not intended to be limitative of my invention except insofar as set forth in the accompanying claims.

Having thus described invention, I declare that what I claim is:

1. In a. selector for automatic phonographs. in combination, a stepping switch, a plurality of circuits each of which is contacted by said switch as a result of an individual number of stepping impulses, a second stepping switch, a second plurality 0:5 circuits each, of which is contacted by said second stepping switch as a result of an individual number of impulses, means for maintaining. the stepping, switches in stepped condi tion, a slow release relay arranged, when energized, t0 renderv said maintaining means operative, switch means associated with said stepping switches. for supplying energy to said relay to maintain it. energized during both series of impulses, means normally connected. to the first stepping switch for supplying impulses thereto, electromagnetic means associated with the first stepping switch for supplying said impulses to the second stepping switch at the end of the first train of impulses, electromagnetic means for supplying power to the two stepping switches and the two circuits to which they are connected to effect selection of a corresponding recording and means associated with the second stepping switch for maintaining said electromagnetic means inoperative until after the termination of its stepping operation.

2. In a selector for automatic phonographs, in combination, a stepping switch, a plurality of circuits each of which is contacted by said switch as a result of an individual number of stepping impulses, a second stepping switch, a second plurality of circuits each of which is contacted by said second stepping switch as a result of an individual number of impulses, means for maintaining the stepping switches in stepped condition, a slow release relay arranged, when energized, to render said maintaining means operative, switch means associated with said stepping switches for supplying energy to said relay to maintain it enerigzed during both series of impulses, a CR circuit in parallel with said relay to increase its slow release quality, means normally connected to the first stepping switch for supplying impulses thereto, electromagnetic means associated with the first stepping switch for supplying said impulses to the second stepping switch at the end of the first train of impulses, electromagnetic means for supplying power to the two stepping switches and the two circuits to which they are connected to efiect selection of a corre-- sponding recording, and meansassociated with the second stepping switch for maintaining said electromagnetic means inoperative until after the termination of its stepping operation.

3. In a selector for automatic phonographs, in combination. a stepping switch, a plurality of circuits each of which is contacted by said switch as a result of an individual number of stepping impulses, a second stepping switch, a second plurality of circuits each of which is contacted by said second stepping switch as a result of an individual number of impulses, means for maintaining the stepping switches in stepped condition during both series of impulses, an impulser line, a first switch normally connecting said impulser line to the first stepping switch, a second switch normally open and arranged to connect the impulser line to a third normally closed switch connected to the second stepping switch and a fourth normally open switch connected to the first stepping switch, cam means arranged to open the first switch and close the second switch after the first stepping switch is stepped into circuit contacting position, a slow release relay associduring the first series of impulses, whereby the second series of impulses is supplied to the second stepping switch through the second and third switches, means for supplying power to the two stepping switches and the two circuits with which they contact to efiect selection Ofacorresponding recording, and means associated with the second stepping switch for maintaining said power supplying means inoperative until after the termination of its stepping operation. 7

4. In a selector for automatic phonographs, in combination, a stepping switch, a plurality of circuits each of which is contacted by said switch as a result of an individual number of stepping impulses, a second stepping switch, a

second plurality of circuits each of which is contacted by said second stepping switch as a result of an individual number of impulses, means for maintaining the stepping switches in stepped condition, a slow release relay arranged, when energized, to render said maintaining means operative, switch means associated with said stepping switches for supplying energy to said relay to maintain it energized during both series of impulses, an impulser line, a first switch normally connecting said impulser line to the first stepping switch, a second switch normally open and arranged to connect the impulser line to a third normally closed switch connected to the second stepping switch and a fourth normally open switch, cam means arranged to open the first switch and close the second switch after the first stepping switch is stepped into a circuit connecting position, a slow release relay associated with the first stepping switch for closing said fourth switch and opening the third switch during the first series of impulses, whereby the second series of impulses is supplied to the second stepping switch through the second and third switches, electromagnetic means for supplying power to the two stepping switches and the two circuits to which they are connected to effect selection of a corresponding recording, and means associated with the second stepping switch for maintaining said electromagnetic means inoperative until after the termination of its stepping operation.

5. In a selector for automatic phonographs, in combination, a stepping switch, a plurality of circuits each of which is contacted by said switch as a result of an individual number of stepping impulses, a second stepping switch, a second plurality of circuits each of which is contacted by said second stepping switch as a result of an individual number of impulses, means for maintaining the stepping switches in stepped condition, a slow release relay arranged, when energized, to render said maintaining means operative, switch means associated with said stepping switches for supplying energy to said relay to maintain it energized during both series of impulses, a CR circuit in parallel with said relay to increase its slow release quality, an impulser line, a first switch normally connecting said impulser line to the first stepping switch, a second switch normally open and arranged to connect the impulser line to a third normally closed switch connected to the second stepping switch and a fourth normally open switch, cam means arranged to open the first switch and close the second switch after the first stepping switch is stepped into a circuit connecting position, a slow release relay associated with the first stepping switch for closing said fourth switch and opening the third switch during the first series of impulses, whereby the second series of impulses is supplied to the second stepping switch through the second and third switches, electromagnetic means for supplying power to the two stepping switches and the two circuits to which they are connected to efiect selection of acorre'sponding recording, and-means associated with the second stepping switch for maintaining said electromagnetic means inoperative until after the termination of its stepping operation.

6. In a selector for automatic phonographs, in combination, a stepping switch, a plurality of circuits each of which is contacted by said switch as a result of an individual number of stepping impulses, a second stepping switch, a second plurality of circuits each of which is contacted by said second stepping switch as 'a result of an individual number of impulses, means for maintaining the stepping switches in stepped condition during both sets of impulses, means for normally supplying impulses to the first stepping switch, means controlled by the first stepping switch for connecting said supplying means to the second stepping switch, a slow release relay associated with the second stepping switch and arranged to be energized thereby while it is receiving impulses, a second relay arranged to be energized by said relay, and a power circuit connected to both stepping switches and including a normally closed switch on the first relay and a normally open switch on the second relay, whereby a power impulse is supplied to both stepping switches and the two circuits contacted thereby, to efiect selection of a corresponding recording.

7. In a selector for automatic phonographs, in combination, a stepping switch, a plurality of circuits each of which is contacted by said switch as a result of an individual number of stepping impulses, a second stepping switch, a second plurality of circuits each of which is contacted by said second stepping switch as a result of an individual number of impulses, means for maintaining the stepping switches in stepped condition, a slow release relay arranged, when energized, to render said maintaining means operative, switch means associated with said stepping switches for supplying energy to said relay to maintain it energized during both series of impulses, means normally connected to the first stepping switch for supplying impulses thereto, a second slow release relay associated with the second stepping switch and arranged to be energized thereby while it is receiving impulses, a third relay arranged to be energized by said relay, and a power circuit connected to both stepping switches and including a normally closed switch on the second relay and a normally open switch on the third relay, whereby a power impulse is supplied to both stepping switches and the two circuits contacted thereby, to effect selection of a corresponding recording.

8. In a selector for automatic phonographs, in combination, a stepping switch, a plurality of circuits each of which is contacted by said switch as a result of an individual number of stepping impulses, a second stepping switch, a second plurality of circuits each of which is contacted by said second stepping switch as a result of an individual number of impulses, means for maintaining the stepping switches in stepped condition, a slow release relay arranged, when energized, to render said maintaining means opera tive, switch means associated with said stepping switches for supplying energy to said relay to maintain it energized during both series of impulses, a CR circuit in parallel with said relay to increase its slow release quality, means normally connected to the first stepping switch for supplying impulses thereto, electromagnetic means associated with the first stepping switch for supplying said impulses to the second stepping switch at the end of the first train of impulses, a, second slow release relay associated with the second stepping switch and arranged to be energized thereby while it is receiving impulses, a third relay arranged to be energized by said relay, and a power circuit connected to both stepping switches and including a normally closed switch on the second relay and a normally open 10 switch on the third relay, whereby a power impulse is supplied to both stepping switches and the two circuits contacted thereby, to eiiect selection of a corresponding recording.

9. In a selector for automatic phonographs, in combination, a stepping switch, a plurality of circuits each of which is contacted by said switch as a result of an individual number of stepping impulses, a second stepping switch, a second plurality of circuits each of which is contacted by saidrsecond stepping switch as a result of an individual number of impulses, means for maintaining the stepping switches in stepped condition during both series of impulses, an impulser line, a first switch normally connecting said impulser line to the first stepping switch, a second switch normally open and arranged to connect the impulser line to a third normally closed switch connected to the second stepping switch and a fourth normally open switch connected to the first stepping switch, cam means arranged to open the first switch and close the second switch after the first stepping switch is stepped into circuit contacting position, a slow release relay associated with the first stepping switch for closing said fourth switch and opening the third switch during the first series of impulses, whereby the second series of impulses is supplied to the second stepping relay through the second and third switches, a second slow release relay associated with the second stepping switch and arranged to be energized thereby while it is receiving impulses, a third relay arranged to be energized by said relay, and a power circuit connected to both stepping switches and including a normally closed switch on the second relay and a normally open switch on the third relay, whereby a power impulse is supplied to both stepping switches and the two circuits contacted thereby, to effect selection of a corre sponding recording.

10. In a selector for automatic phonographs, in combination, a stepping switch, a plurality of circuits each of which is contacted by said switch as a result of an individual number of stepping impulses, a second stepping switch, a second plurality of circuits each of which is contacted by said second stepping switch as a result of an individual number of impulses, means for maintaining the stepping switches in stepped condition, a slow release relay arranged, when energized, to render said maintaining means operative, switch means associated with said stepping switches for supplying energy to said relay to maintain it energized during both series of impulses, an impulser line, a first switch normally connecting said impulser line to the fir t stepping switch, a second switch normally open and arranged to connect the impulser line to a third normally closed switch connected to the second stepping switch and a fourth normally open switch, cam means arranged to open the first switch and close the second switch after the first stepping switch is stepped into a circuit connecting position, a second slow release relay associated with the first stepping switch for closing said fourth switch and opening the third switch during the first series of impulses, whereby the second series of impulses is supplied to the second stepping switch through the second and third switches, a third slow release relay associated with the second stepping switch and arranged to be energized thereby while it is receiving impulses, a fourth relay arranged to be energized by said third slow release relay, and

a power circuit connected to 'both stepping switches and including a normally closed switch on the third slow release relay and a normally open switch on the fourth relay, whereby a power impulse is supplied to both stepping switches and the two circuits contracted thereby, to effect selection of a corresponding recording.

11. In a selector for autOmatic phonographs, in combination, a stepping switch, a plurality of circuits each of which is contacted by said switch as a result of an individual number of stepping impulses, a second stepping switch, a second plurality ofcircuits each of which is contacted by said second stepping switch as a result of an individual number of impulses, means for maintaining the stepping switches in stepped condition, a slow release relay arranged, when energized, to render said maintaining means operative, switch means associated with said stepping switches for supplying energy to said relay to maintain it energized during both series of impulses, a CR circuit in parallel with said relay to increase its slow release quality, an impulser line, a first switch normally connecting said impulser line to the first stepping switch, a second switch normally open and arranged to connect the impulser line to a third normally closed switch connected to the second stepping switch and a fourth normally open switch, cam means arranged to open the first switch and close the second switch after the first stepping switch is stepped into a circuit connecting position, a second slow release relay associated with the first stepping switch for closing said fourth switch and opening the third switch during the first series of impulses, whereby the secOnd series of impulses is supplied to the second stepping switch through the second and third switches, a third slow release relay associated with the second stepping switch and arranged to be energized thereby while it is receiving impulses, a fourth relay arranged to be energized by said third slow release relay, and a power circuit connected to both stepping switches and including a normally closed switch on the third slow release relay and a normally open switch on the fourth relay, whereby a power impulse is supplied to both stepping switches and the two circuits contacted thereby, to effect selection of a corresponding recording.

ALBINUS G. BODOH.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,331,151 Hopkins Feb. 17, 1920 1,498,544 Fowler June 24, 1924 1,781,520 Nessell Nov. 11, 1930 1,911,949 Gould May 30, 1933 2,398,067 Winkler Apr. 9, 1946 2,570,930 Filo et a1. Oct. 9, 1951