US2304590A

US2304590A - Remote control apparatus for selectively operated machines

Info

Publication number: US2304590A
Application number: US272162A
Authority: US
Inventors: Fred H Osborne
Original assignee: Wurlitzer Co
Current assignee: Wurlitzer Co
Priority date: 1939-05-06
Filing date: 1939-05-06
Publication date: 1942-12-08
Anticipated expiration: 1959-12-08

Description

Dec. 8, 194;. F, H. OSBORNE 2,304,590

REMOTE CONTROL APPARATUS FOR sEILEcTIvELY OPERATED MACHINES Filed May 6. 1939 3 Sheets-Sheet 1 /Z33 v I 7 lllllllllllllllllllllllll ill!!! 9 rflilflll/ mm I A y y Du. 8, F. H.- OSBORNE 2,304,590

CONTROL APPARATUS FOR S ELECTIVELY OPERATED MACHINES REAL Filed May 6, 1939 5 Sheets-Sheet 2 MM'TZQQ 5-- INVENTOR. 2750 fif 0350mm,

A ORNEY5.

F. H. OSBORNE Dec. 8, 1942.- REMOTE CONTROL APPARATUS FOR SELECTIVELIY OPERATED MACHINES Filed May 6, 1939 3 Sheets-Sheet 5 -1: n 5 //Z M5 INVENTOR BY 17:2 bf 0.20/17 I f T25153 Patented Dec. 8, 1942 REMOTE CONTROL SELECTIVELY OPERATED MACHINES Fred H. Osborne, Snyder, N. Y., assignor to The Rudolph Wurlitzer Company, Cincinnati, Ohio,

a corporation APPARATUS FOR Application May 6, 1939, Serial No. 272,162

Claims.

This invention relates to a remote control for selectively operated machines such as automatic phonographs and the like.

One object of the invention is to provide a remote control by means of which a large number of different operations such as the selection of phonograph records to be played may be made from a distance with a minimum amount of wiring connecting the remote control station with the machine to be controlled.

The invention is described herein as adapted for use with a selectively operated automatic phonograph of the kind shown in Wilcox Patent No. 2,002,236 but it is equally applicable to other types of controlled machines having a plurality of local control members, such as push buttons or the like, each of which controls an operation of the machine. The apparatus comprising the invention in its preferred form may be divided into three distinct mechanisms electrically interconnected. The first is the coin register located at the remote station and adapted .to evaluate coins received in terms of selections to .be played. For household use where coin control is not desired,

the register is omitted. The second mechanism is the selection transmitter also located at the remote stationand provided with a number of selector members such as push buttons, each corresponding to a record to be played. This mechanism is such that any number .of records limited ated by signal received from the transmitter.

The operation of the transmitter and receiver is such that once a group of selections has been made at the transmitter, a single cycle of operations of the transmitter transfers the entire group of selections to the receiver. ates the local control members of the controlled machine.

Other objects and features of the invention will be understood from the accompanying drawings and the following description and claims:

Fig. 1 is a side view of a preferred form .of coin register. Fig. 2 is an end view thereof and Fig.3 is a centralsectional view taken substantially on the line 3-3 of Fig. 2. Fig. 4 is an end view of a preferred form of the transmitter. Fig. 5 is a central sectional view of the same taken substantially on the line 5-5 of Fig. 6. Fig. 6 is a sectional view taken on the line 5-3 of Fig. 5. Fig.

The receiver operratus-of Fig. 5. Fig. 8 is a perspective view of one Coin register The coin register disclosed in Figs; 1, 2, 3 and 12 is similar in most respects to one disclosed inco-pending application of Fred H. Osborne and Theodore M. Wright, Serial No. 180,728, filed December 20, 1937. In this mechanism any well known form of coin receiver, such as the coin slide ll, Fig. 12, may be used. The coin receiver may be arranged to operate a ratchet It by means of a pawl I9 each time a coin is inserted and the slide I! is pressed home. The ratchet wheel I8 is mounted on a shaft 2| and said shaft is rotated through a predetermined angle each time acoin is received. Preferably several slides I"! are provided each adapted to receive a coin of a different denomination and each arranged to turn shaft 2| through an angle proportional to the value of the coin normally received thereby.

The shaft 2| is mounted on a stationary frame and has secured thereto a hub 22 carrying

radial arms

23 and 24 preferably formed in a single piece. A ratchet wheel 25 is freely mounted on the shaft 2| and is held in position by a bushing 26 abutting against the ratchet wheel and against a portion of the stationary frame 20.

A trigger 21 is pivotally mounted on the back of the ratchet wheel 25 by means of a pivot pin 28 engaging suitable lugs formed on the trigger and on the ratchet Wheel. The end of the trig er remote from the pivot pin is bent at right angles as shown at 29 and enters a rectangular opening 30 in the ratchet wheel. The end of the arm 23 is bent as best seen in Fig. 3 to rest against the face of the ratchet wheel 25 to retain the trigger 21 in registry with the opening 30. When said arm is moved relative to the ratchet wheel so as to uncover the opening 39, the trigger 2'! is free to move on its pivot pin 28 and to protrude through the opening. g

A lever 3| is pivotally mounted on the frame 20 by means of a pivot pin 32 and has a forked upper end 33 engaging a washer 34 in-turn engaging the trigger 27. A screw 35 is adjustably mounted on the lever 3| and passes through a suitable opening in the frame 20 to engage one of the'leaves of an electric switch 36. One of the leaves of a second switch 31 is mechanically connected by an insulation block 38 with the switch 36 so that both switches are opened by pressure of the screw 35 and both are closed by a release of said pressure. The

switches

36 and 31 are mounted on and insulated from the frame 28 and the end of the screw 35 carries suitable insulation material.

A roller 39 mounted on the free end of a lever 46 engages the teeth of the ratchet wheel 25. The lever 46 is mounted on a pivot pin 4| in turn mounted on the frame 20. The roller 39 is maintained in contact with the ratchet wheel by a tension spring 42 secured to a member 42a which is slidably mounted on the frame 20.

An electromagnet 43 is mounted on the frame 20 and is provided with a plunger 44 attached to a lever 45 pivotally mounted at 46 on the frame 20. An arm 41 is mounted on a pivot pin 48 attached to the outer end of the lever 45 and extends upwardly into engagement with the teeth of the ratchet wheel 25. The arm 41 is resiliently held against a stop 49 formed on the member 420. by means of a compression spring 50 mounted on the pivot pin 48. The spring 42 thus resiliently holds both'the roller 39 and arm 41 against the teeth of the ratchet wheel 25.

In the operation of the coin register, the shaft 2] is rotated by theoperation of the slide I! after receipt of a coin or coins. The movement of the shaft is through an angular distance equivalent to one tooth of the ratchet wheel 25 when a coin is received of proper value for one selection to be played and is through corresponding greater angles upon the receipt of coins of greater value. In the rotation of the shaft 2i the ratchet wheel is held in place by the pressure of the roller 39 thereon. The arm 23 moves with the shaft 21 and thus uncovers the opening 30 and permits the lever 21 to be pressed through the opening 30 by the resilient action of the leaves of the

switches

36 and 31. These switches are thus closed whenever the opening 36.is uncovered.

The solenoid 43 is momentarily actuated as hereinafter described each time a selection is checked off and the actuation thereof lifts the arm 41 into engagement with one of the ratchet wheel teeth and moves the ratchet wheel in the direction of rotation of the shaft 2 I. Thus, when the solenoid 43 hasbeen actuated a number of times equivalent to the number of selections which have been paid for, the opening 30 in the ratchet Wheel overtakes the arm 23. The edge of the arm 23 is properly chamfered and the end of the lever 21 is properly shaped so that the engagement between the same presses the lever 21 back to the position shown in Fig. 3 and opens the

switches

36 and 31. When this condition has been reached, a stop pin mounted on the ratchet wheel 25 engages the arm 23 and subsequent actuations of the solenoid 43 move the ratchet wheel and arm together without affecting the operation of

switches

36 and 31.

By means of the coin register, the

switches

36 and 31 are closed only when coins have been received and have not been checked oil by a corresponding number of actuations of the solenoid 43. Transmitter Referring now to Figs. 4 to 8, inclusive, the transmitter is provided with a plurality of selector'pins or push buttons 66 equal in number to the number of selections available in the phonograph. These pins are slidably mounted in a stationary disc 6| having an annular groove 62 in the outer edge thereof. A tension spring 63 lies in the groove 62 and is adapted to engage grooves 64 in the pins 68 for retaining the same in selected position. The pins 68 extend to the right, referring to Fig. 5, to a point accessible to an operator of the machine and, in their idle or unselected position, are located as shown by the uppermost of the pins 68 in Fig. 5. When pressed to operative position to select the corresponding record, the pins assume the position illustrated by the lowermost of the pins 68.

Screwed into a central threaded bore in the frame disc 6], there is a sleeve 65 which serves as a seat for the spool and winding of an electromagnet 66 and which also serves as a journal for the hub of a rotatable member 61 shown in detail in Fig. 8. The interior of the sleeve 65 serves also as a guideway for a plunger 68 adapted to be attracted by the magnet 66. The rotatable member 61 has mounted on its upper end a pair of contact leaves forming an electric switch 69. Said leaves are suitably insulated from the member 61 and from each other and each is provided with a brush l6 engaging an electrical contact ring H mounted on an annular insulation member 12 which is in turn supported by brackets 13 from the frame disc 6|. The leaves of the switch 66 are in position to be engaged by the ends of the selector pins 60 when said pins have been pressed to the selected position but may pass freely beyond said ends when said pins are in their idle position. The rotatable member 6'! has formed on its lower end a pair of bearing lugs 14 on which there is pivotally mounted, by means of a pin 15, a lever 16. Said lever is pivotally attached to the plunger 68 and carries at its upper end a hammer ll positioned to register with the end of each of the pins 66 when said pin is engaged by the switch 59. A. compression spring 18 is interposed between the lever 16 and the rotatable member 6'! and normally retains the hammer 11 in the position shown in Fig.5.

An electric motor 19 is suitably mounted on any fixed support with its shaft 86 arranged coaxially with the sleeve 65. Said shaft has mounted thereon a hub 8| carrying a disc 82 provided with a number of pins 83. Said pins are equal in number to the selector pins 56 and the angular spacing about the center of shaft is the same as that of pins 68. The pins 83 successively engage one of the leaves of an electric switch 84 which is adjustably mounted as shown at 85 on any suitable fixed support. The leaves of the switch 84 are insulated from each other and from their support and the disc 82 or pins 83 are formed of insulating material. The shaft 86 also carries a collar 86 in turn carrying a pair of yoke arms 81 which pass freely through suitable openings in the disc 82 and engage openings 88 in the rotatable member 61 for rotating the same.

A switch 88 has one of its leaves engaging the periphery of the disc 82 which is provided with a notch 90 in which the arcuate end 9| of said leaf may engage. In the rotation of the disc 82, the switch 89 is opened when the end 9| thereof engages the notch 96 but is closed at other times.

In the operation of the transmitter as so far described, the member 6'! is rotated by the motor 19. The switch 69 scans the operative positions of the selector pins 66 and each time it reaches one of the pins which has been placed in the operative position, said switch is closed. By means of electric circuits to be hereinafter described the solenoid 66 is actuated by the closure of switch 69 and the hammer I1 is caused to strike the pin 60 which has just :been engaged by said switch and to return the pin to its normal position. At the same time, the disc 82 is rotated and the switch 84is closed each timeone of the pins 83 strikes the same. The operation of switch 84 is so timed by adjustment of its position with respect to the pins 83 that the closure takes place slightly ahead of and continues during the operation of switch'69. It is to be noted, however, that switch 34 is actuated once by each of the pins 83, whereas switch 69 is actuated only by the pins 60 which have been placed in selected position. The switch 89 is closed'when the disc 82 leaves an initial idle position and is not reopened until said disc has made a complete revolution.

Receiver In Figs. 9 and of the drawings the local control members-of the controlled machine appear as a group of pins IulI corresponding to pins 32 of Fig. l of the Wilcox patent before mentioned. Each of said pins is adapted when pressed to the right in Fig. 9 to control the selection of a certain record to be played. The mechanism by which this is accomplished is shown in the Wilcox patent and forms no part of the present invention. Said pins are slidably mounted in a stationary member I92 which is provided with a peripheral tension spring I03. Each of the pins is furnished with a notch I34 adapted to engage the spring I03 to retain the pins in the selected. position. For moving the pins from the idle to the selected position, there is provided a hammer I35 mounted on a lever I06 which is pivotally mounted on a pin IB'I. The pin III! is carried by a rotatable member I08 which is similar in construction to the rotatable member BI except that the upper portion thereof carrying theswitch B9 is omitted. The member I98 is mounted in a similar manner to the member 3! and is rotated in a similar manner by means of a yoke I29 mounted on a shaft III The hammer I IE5 is operated by an electromagnet II I in the same manner as the hammer I1 is operated by the electromagnet 66.

The shaft III! is suitably journalled in a stationary plate H2 and has mounted thereon a ratchet wheel H3. A pawl H4 is mounted on a pivot pin II5 secured to plate H2 and operating in a slotted opening .I I6 in said pawl. is connected by a link I II to the plunger I18 of an electromagnet II'B mounted on plate -I I2 and is normally held against a stop pin I2Il by a tension spring Hi. The upper end of the pawl H4 is adapted to engage the teeth of the ratchet wheel H3 and to rotate the ratchet wheel, shaft III! and hammer I 25 through an angle corresponding to one of the teeth of said ratchet wheel each time magnet I I9 is energized. Said rotation is opposed by a coiled clock spring I22 having one end secured to the shaft III! and the other to the plate II 2. A second pawl I23, pivoted to plate H2 at I24 is normally held in engagement with the teeth of the ratchet wheel H3 by a tension spring I25 and normally prevents return movement of the ratchet wheel by the sping I22.

The pawl I23 serves as the armature of an electromagnet I26 adapted when energized to withdraw the pawl from engagement with the ratchet teeth. A latch bar I2! is pivotally mounted on a pin I28 secured to the plate H2 and has a latching engagement with the upper end of pawl I23 adapted to retain said pawl out of engagement with the ratchet teeth when electromagnet I26 has been energized and subse- Said pawl quently deenergized. A pin I29 mounted on the ratchet wheel -I I3 engages an abutment I30 formed on the latch lever I2! when the parts are in the initial position shown in Fig. 10. Said pin has an insulated extension I'3I on the reverse side of the ratchet wheel adapted to engage one of the leaves of an electric switch I32 which is mounted on and suitably insulated from the plate .I I2.

In the operation of this part of the invention, the parts :are initially in the position shown in Fig. 10. Successive actuations of the magnet Hi9 advance the ratchet wheel .step-by step in the direction of the arrow until at the last actuation of the magnet I'I'9 extension I3I of the pin I29 closes switch I32. The closing of said switch .energizes the electromagnet I26 by a circuit to tbe hereinafter described. Magnet I23 withdraws pawl I23 from ratchet wheel H3 and latchbar I2I engages said pawl and holds the same out of engagement. Subsequent deenergiz'ing of magnet II9 permits the spring I 22 to return said ratchet wheel to the initial position. The return movement is stopped by engagement of pin I29 with abutment I39, at which time said pin also engages the lower surface of lever I21 and lifts the same out of engagement with pawl I23. Since .magnet I26 is now deenergized, the pawl returns to-its original position.

Wiring diagram Referring now to the wiring diagram, Fig. 11, there are indicated therein the several switches andelectromagnets and the motor I9 already described. There is also shown an electromagnet I33 not shown in the drawings. Said magnet corresponds to the magnet I58 in Fig. 18 of the Wilcox Patent 2,002,236 which places the controlled machine in condition to play one selection each time the magnet is energized. This magnet thus serves thesame purpose as the coin register magnet in the usual phonograph mechanism.

Power for operating the apparatus may be supplied from any suitable source, as by a pair of conductors I34. Preferably certain of the apparatus is operated at a low voltage and for this purpose there is providedatransformer I35 which may be located at the remote station or at the controlled machine, as desired. A conductor I36 is connected to both the primary and secondary windings of the transformer I35 and serves as a common. return line for both high voltage and low voltage circuits. A conductor I 3! connected to the opposite terminal of the primary winding of the transformer serves as a distributary forthe high voltage circuits. A conductor I38 connected to the opposite terminal of the secondary winding of the transformer serves as a distributary for the low voltage circuits. Other conductors shown in the diagram will be referred to by reference number only in. tracing the circuits of which they form a part. The circuits may best be described in connection with a rsum of the operation of'the entire apparatus.

Operation In the idle condition of the apparatus, all of the switches are open and all of the electromagnets are deenergized. The mechanical parts are in the condition shown in the drawings. The lever I6 carrying the hammer II is positioned with said hammer approximately midway between two of the pins (Fig. 6).

Let it now be assumed that it .is desired to play five selections. Fiveof the pins 60 in the transmitter corresponding to the five desired selections are pressed to the left (Fig. into the path of travel of the scanning switch 69. A coin or coins are then inserted sufiicient in value to pay for the five selections. The receipt of the coins causes rotation of the shaft 2I of the coin register a distance proportional to five teeth of the ratchet wheel 25. The arm 23 is moved counterclockwise in Fig. 2 a distance corresponding to said five teeth and switches 36 and 31 are closed as previously described.

The closing of switch 35 has no immediate effect. The closing of switch 3! completes a circuit for motor I9 (I31, 31, I39, I9, I36). The operation of motor I9 starts the rotation of the transmitter parts as previously described.

The first event to occur in the rotation of these parts is the closing of switch 89 which is in parallel with switch 31 in the motor circuit. Thus the motor will continue to run for at least a complete revolution of the disc 82 even though switch 31 is later opened.

The next event is the engagement of one of the pins 83 with switch 84. Switch 84 is thus closed and completes a circuit for the magnet H9 (I38, 84, I45, H9, I36). The operation of this magnet turns the receiver hammer I05 through a distance corresponding to one tooth of ratchet H3 and places the same in registry with one of the pins IOI. At this time the motor I9 has turned the transmitter hammer I!- so that it is in registry with one of the pins 60. Successive engagements of the pins 83 with the switch 84 similarly operate the magnet I I9 so that the hammer I05 is moved in step with the hammer 11. Thus each time the hammer 'II registers with one of the pins 60 the hammer I05 registers with a corresponding pin IOI. Obviously each local control pin IOI may control the selection in the phonograph of the record designated for the corresponding remote selector pin 60.

Assuming that the first of the pins 60 to be reached by the hammer I! was not selected, the scanning switch 69 passes said pin without engagement and no result is obtained other than the spacing of the hammer I05 to follow the movement of the hammer TI. The scanning switch 69 reaches the first of the pins 60 which have been placed in selected position just after the switch 84 has been closed to place the hammer I05 in registry with the corresponding pin WI. The closing of switch 69 by engagement with said pin completes a circuit for solenoid 43 (I38, II, I0, 69, I0, II, I40, I l-I, 43, I36). The operation of solenoid 43 moves the ratchet wheel 25 in the coin register one space and thus checks off one selection value on said coin register.

The closing of switch 69 also completes a circuits for solenoid 66 (I28, II, I0, 69, I0, II, I42, 66, I36). The operation of solenoid 66 causes the hammer TI to strike the selected pin 60 to return the same to its idle position.

The closing of switch 69 also completes a circuit for solenoid III (I38, II, 10, 69, I0, II, I40, 36, I43, III, I36). The operation of solenoid III operates the hammer I05 to strike the pin IM to place the same in the selected position.

The closing of switch 69 also completes a circuit for the magnet I33 (I38, II, I0, 60, I0, II, I40, 35, I43, I33, I36). The operation of solenoid I33 places the controlled machine in condition to play one selection as taught in the Wilcox patent previously mentioned.

Successive engagements of the switch 69 with the pins 60 similarly result in the checking off of values on the coin register, the placing of the corresponding pins IOI in selected position and the registry of coin values by the magnet I33 until when five such selections have been made the coin register has resumed its initial posi tion and switches 36 and 31 are opened. The opening of switch 30 prevents the subsequent completion of the circuits for magnets III and I33 so that no more selections can be transmitted to the receiver, even though more than five of the pins 60 have been selected. The opening of switch 31 has no immediate result since switch 89 is closed and the motor I9 continues to run until one complete revolution of the disc 82 has been made, This is for the purpose of returning all of the pins 60 to idle position in the case that excess selections have been made and to insure that the receiver is returned to initial position.

Assuming that six selections were made but only five were paid for, the first five operations of the switch 69 are effective as previously described, leaving one of the pins 60 in selected position. When this pin is engaged by switch 69, magnet 56 is operated as before to return the pin to idle position. Magnet 43 is also operated but results merely in turning the ratchet wheel 25, arm 23 and shaft 2| together since pin 5I engages the arm 23. Magnets III and E33 are not energized since switch 36 has been opened. a 1

One complete revolution of disc 82 returns the notch 90 to the switch 89, permits said switch to be opened and stops the operation of motor I9. The last actuation of switch 64 in this revolution moves the receiver ratchet H3 to engagepin I3! with switch I32. The closing of switch I32 completes a circuit for magnet I25 (I31, I32, I44, I26, I36). The operation of said magnet frees the pawl I23 from the ratchet wheel H3 but the ratchet wheel is prevented from immediately returning to the initial position by the fact that magnet H9 remains energized until the hammer I05 has had time to operate, if the selections made call for such operation. The opening of switch 64 just prior to the completion of the revolution of disc 82 deenergizes magnet H9 and permits the receiver parts to return to initial position.

It will be observed that ratchet wheel II3 can not make a complete revolution due to interference of pin I29 with abutment I30. For that reason said ratchet wheel may be provided with one more tooth than the number of possible selections and the pins IOI may be spaced accordingly. The same result may be obtained by using a ratchet with the same number of teeth as the number of selections, placing the first pin IOI in registry with the initial position of the hammer I05 and omitting the first of the pins 03 in the transmitter. Thus with twelve available selections only eleven movements of hammer I05 are required and the pins I 0| may be uniformly spaced,

The parts have all now returned to initial position. The pins IOI at the controlled machine corresponding to the remote selector pins 60 which were pressed have been placed in selected position and the magnet I33 has been operated a number of times equal to the number of selections to be played so that the controlled machine is in condition to play all of the records selected. The pins IOI are returned to particular type of controlled machine shown in the Wilcox patent mentioned. Obviously the details may be considerably varied and the invention may be adapted to control other types of machines without departing from the scope thereof as defined by the appended claims.

The invention claimed is: 1. Remote control apparatus for operation of a machine having a plurality of local control.

members each movable to control a variable operation of the machine, said remote control apparatus including a plurality of remotely positioned selector members each selectively movable from an idle to an operative position and each corresponding to one of said local control members, a movable element having a scanning portion adapted to scan the operative positions of said selector members and to engage in said scanning movement such of said selector members as have been placed in operative position, an operating member movable into registry with each of said local control members successively, electrically operated means controlled by movement of said movable element and moving said operating member to register with each of said local control members as said scanning portion scans the position of the corresponding remote control member, and other electrical means operated by engagement of said scanning portion with each of said remote control members to actuate said operating member to move the local control member with which it is then in registry, starting means for said machine, and

means operable concurrently with said other electrical means for operating said starting means.

2. Remote control apparatus for operation of a machine having a plurality of local control members each movable to control an operation of the machine, said remote control apparatus including a plurality of remotely positioned selector members each selectively movable from an idle to an operative position and each corresponding to one of said local control members, a movable element having a scanning portion adapted to scan the operative positions of said selector members and to engage in said scanning movement such of said selector members as have been placed in operative position, an operating member movable into registry with each of said local control members successively, electrically operated means controlled by movement of said movable element and moving said oper-. ating member to register with each of said local control members as said scanning portion scans the position of the corresponding remote control member, other electrical means operated by engagement of said scanning portion with each of said remote control members to actuate said operating member to move the local control member with which it is then in registry, and means operating substantially simultaneously therewith for returning said last mentioned remote control member to idle position.

3. Remote control apparatus for operation of a machine having a plurality of local control members each movable to control an operation of the machine, said remote control apparatus including a plurality of remotely positioned selector members each selectively movable from an idle to an operative position and each corresponding to one of said local control members, a movable element having a scanning portion adapted to scan the operative positions of said selector members andto engage in said scanning movement such of said selector members as have been placed in operative position, an electromag= netically operated hammer movable into registry with each of said local control members successively, electrically operated means controlled by movement of said movable element and moving said hammer. to register with each of said local control members as said scanning portion scans the position of the corresponding remote selector member, a second electromagnetically operated hammer movable with said scanning portion into registry with each of said remote selector members successively, an electric switch operated by engagement between said scanning portion and each of said remote selector members, electromagnetic elements and associated electric circuits controlled by said switch and adapted to actuate said first mentioned hammer to strike and move the local control member with which it is then in registry and to actuate said second mentioned hammer to strike the corresponding remote selector member to return the same to idle position when said switch is operated.

4. Remote control apparatus for operation of a machine having a plurality of local control members each movable to control an operation of the machine, said remote control apparatus including a plurality of remotely positioned selector members each selectively movable from an idle to an operative position and each corresponding to one of said local control members, a movable element having a scanning portion adapted to scan the operative positions of said selector members and to engage in said scanning movement such of said selector members as have been placed in operative position, an operating member movable into registry with each of said local control members successively, an electromagnetically operated ratchet mechanism for moving said operating member, an electric switch periodically operated by movement of said movable element, an electric circuit controlled by said switch and operating said ratchet mechanism to move said operating member to register with each of said local control members as said scanning member scans the position of the corresponding remote selector member, and electrically operated means operated by engagement of said scanning portion with each of said remote control members to actuate said operating member to move the local control member with which it is then in registry.

5. Remote control apparatus for successive operations of a machine having a plurality of local control members each movable to control an operation of the machine, said remote control apparatus including a local scanning member movable to scan a plurality of positions each corresponding to one of the several local control members, a plurality of remotely positioned selector members each selectively movable from an idle to an operative position, a remote scanning member movable to scan the operative positions of said selector members and to engage in said scan,

ning movement such of said selector members as have been placed in operative'position, means :electrically synchronized with the movement of said remote scanning member for moving said local scanning member in timed relation with the movement of said remote scanning member, electrically operated means adapted to move said local control members, said electrically operated .means being actuated. by engagement of the remote scanning member with an operatively posi-