US3756715A — Tape recorder with control device for a slide pro…

Claim 1

Independent Claim 347 words

Tape recorder and control system, adapted to operate in conjunction with an automatic slide changing type slide projector, responding to change-signals to change projection of an image, especially for use in a teaching system, wherein instruction items are recorded on tape to be reproduced by the tape recorder and wherein control signals are recorded on the tape, comprising means (20, 21, 22) including a motor (20) driving the recording tape (14), selectively, in forward and reverse direction; means (VM, RM) controlling respective forward and reverse direction of the driving means; a sound reproducing head (19) sensing instruction items recorded on the tape; a control signal reproducing head (3) sensing control signals recorded on the tape, said control signal reproducing head (3) being located in the recorder with respect to the tape to sense control signals thereon when the tape is running either in forward, as well as in reverse direction; first manually controllable switch means (V) having first and second selectively setable switching positions; means (4, J, j1, j2) responsive to a signal from said control signal reproducing head (3) and connected to said first manually controllable switch means (V), said switch means establishing a connection, selectively and alternately to said projector (P) when in a first position and transmitting control pulses from said control signal reproducing head to call the projector to change projected images and, when in the second position, to connect two said tape driving means to transmit pulses from said control signal reproducing head to cause the tape driving means to stop the tape; and releaseable repeat switch means (Y, 8, 9) to control repetition of selected sections of the tape (14) connected to and controlling the motor direction control means (VM, RM), and circuit means to cause said tape drive means when operating in a reverse direction to stop upon sensing a recorded control signal on the tape, which forms, due to reverse running of the tape, the next preceding recorded control signal, the repeat switch means being interconnected by said manually controllable switch over means (Z) when in the second position.

Claim 2

Dependent Claim 347 words

Tape recorder and control system, adapted to operate in conjunction with an automatic slide changing type slide projector, responding to change-signals to change projection of an image, especially for use in a teaching system, wherein instruction items are recorded on tape to be reproduced by the tape recorder and wherein control signals are recorded on the tape, comprising means (20, 21, 22) including a motor (20) driving the recording tape (14), selectively, in forward and reverse direction; means (VM, RM) controlling respective forward and reverse direction of the driving means; a sound reproducing head (19) sensing instruction items recorded on the tape; a control signal reproducing head (3) sensing control signals recorded on the tape, said control signal reproducing head (3) being located in the recorder with respect to the tape to sense control signals thereon when the tape is running either in forward, as well as in reverse direction; first manually controllable switch means (V) having first and second selectively setable switching positions; means (4, J, j1, j2) responsive to a signal from said control signal reproducing head (3) and connected to said first manually controllable switch means (V), said switch means establishing a connection, selectively and alternately to said projector (P) when in a first position and transmitting control pulses from said control signal reproducing head to call the projector to change projected images and, when in the second position, to connect two said tape driving means to transmit pulses from said control signal reproducing head to cause the tape driving means to stop the tape; and releaseable repeat switch means (Y, 8, 9) to control repetition of selected sections of the tape (14) connected to and controlling the motor direction control means (VM, RM), and circuit means to cause said tape drive means when operating in a reverse direction to stop upon sensing a recorded control signal on the tape, which forms, due to reverse running of the tape, the next preceding recorded control signal, the repeat switch means being interconnected by said manually controllable switch over means (Z) when in the second position.

Claim 3

Dependent Claim 39 words

System according to claim 1 further comprising hand operable switch means (X) including contact means (2, b, u3) estaBlishing a circuit transmitting change control signals for the projector to said projector to effect image change operation of said projection.

Claim 4

Dependent Claim 95 words

System according to claim 1 comprising controlled switching means (C); a hand operable switching means (X) connected for activation to said controlled switching means (C), said controlled switching means, when activated, controlling the drive means for forward movement of the tape; and interconnection means connecting said releasable repeat switch means (Y, 8, 9), said connection means (4, J, j1, j2), the control signal reproducing head (3) and the controlled switch means (C), to control the controlled switch means (C) into deactivated state to thereby disconnect the driving means and interrupt forward movement of the tape.

Claim 5

Dependent Claim 38 words

System according to claim 3 wherein the controlled switch means comprises a relay (C) having a holding circuit (c2), the interconnection means including a circuit providing a bypass to said controlled switching means (C) to cause deactivation thereof.

Claim 6

Dependent Claim 83 words

System according to claim 1 comprising a directing circuit (L, l1, l2) energized by said releaseable switch means (Y, 8, 9), said directing circuit connecting control signals derived from said control head (3) to the tape drive means (20, 21, 22) and the tape control means (Rm) to control the tape to be driven in reverse direction, the tape stopping when a control signal is sensed and connected to the tape drive means by said controllable switch means (Z) in the second position.

Claim 7

Dependent Claim 29 words

System according to claim 5 wherein the directing circuit includes a switching element (L), said switching element being switched to disconnected position upon sensing of a control signal pulse.

Claim 8

Dependent Claim 78 words

System according to claim 1 further comprising contact means (2, b, U, u3) establishing a circuit transmitting slide change signals to the projector; a slow release relay means (D) having a circuit path connected in parallel to at least a portion of said contact means (U), the slow release relay suppressing pulses from said control signal reproducing head which may occur briefly after start of operation of the tape (14) in forward direction, to prevent spurous while changing.

Claim 9

Dependent Claim 141 words

System according to claim 1 including connection means (V, U) energized, respectively, and in accordance with the direction of operation of said tape drive means in conjunction with said tape control means (Vm, Rm), one of said connection means being energized if the tape drive means is controlled for operation in a forward direction, and the other of said connection means (U) being energized if the tape drive means is controlled for reverse direction, so that, respectively, the forward or reverse control means (Vm, Rm) are operative; and a hand operable switching means (X) commanding forward movement of the tape; the connection means controlling forward movement of the tape being disabled upon operation of said repeat switch means (Y) and the connection means energized upon reverse operation of the tape being disabled upon operation of said and operable switch means (X).

Claim 10

Dependent Claim 37 words

System according to claim 1 including means (R) controlling the speed of operation of the tape when in reverse direction, said speed being controlled to be from 3 to 7 times faster than when in forward direction.

Claim 11

Dependent Claim 275 words

Tape recorder and control system to operate in conjunction with an automatic slide changer - type slide projector responding to slide change signals, specifically for teaching systems, wherein instruction items are recorded on the tape and wherein control signals are recorded on the tape (14) in conjunction with specific instruction items, the control signals being associated with specific instruction items and being placed to effect change of image projection of the slide projector upon presentation of new instruction items, comprising means (20, 21, 22) driving the magnetic recording tape (14), selectively, in forward and reverse direction; means (VM, RM) controlling movement, and direction of movement of the tape; a sound reproducing head to sense instruction items recorded on the tape (14); means (3) sensing control signals recorded on the tape; first means connecting the control signal sensing means (3) to the projector (P) to control changing of the projection image as a control signal is sensed; first means interlocking the tape direction control means and said first connection means to effect the connection of the projector if, and only if the tape is commanded to operate in forward direction; second means connecting the control signal sensing means to the tape control means to control the tape to stop; and second means interlocking the direction control means and said second connection means to effect the connection to the stop control if the tape is commanded to operate in reverse direction, said second interlocking means inhibiting application of pulses from the sensing means (3) to the projector (P) so that no change of image will occur when the tape has been commanded to run in reverse direction.

Claim 12

Dependent Claim 275 words

Tape recorder and control system to operate in conjunction with an automatic slide changer - type slide projector responding to slide change signals, specifically for teaching systems, wherein instruction items are recorded on the tape and wherein control signals are recorded on the tape (14) in conjunction with specific instruction items, the control signals being associated with specific instruction items and being placed to effect change of image projection of the slide projector upon presentation of new instruction items, comprising means (20, 21, 22) driving the magnetic recording tape (14), selectively, in forward and reverse direction; means (VM, RM) controlling movement, and direction of movement of the tape; a sound reproducing head to sense instruction items recorded on the tape (14); means (3) sensing control signals recorded on the tape; first means connecting the control signal sensing means (3) to the projector (P) to control changing of the projection image as a control signal is sensed; first means interlocking the tape direction control means and said first connection means to effect the connection of the projector if, and only if the tape is commanded to operate in forward direction; second means connecting the control signal sensing means to the tape control means to control the tape to stop; and second means interlocking the direction control means and said second connection means to effect the connection to the stop control if the tape is commanded to operate in reverse direction, said second interlocking means inhibiting application of pulses from the sensing means (3) to the projector (P) so that no change of image will occur when the tape has been commanded to run in reverse direction.

Claim 13

Dependent Claim 120 words

System according to claim 10 including manual switching means (X, Y) providing direction pulses to said projector to cause the projector to change images independently of sensed control signals derived from said tape, in either forward direction (X) or reverse direction (Y), said manual switching means being interlocked with the movement and direction control means controlling movement of the tape to prevent image changing of images in a forward direction if, immediately preceding, said tape has been commanded to operate in reverse direction for one instruction item, or to permit image changing in reverse direction after the tape has been commanded to run in reverse direction for one instruction item and is again commanded to run further in backward direction.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1976-09-03	1977-03-05	1977-09-04	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1980-09-03	1981-03-05	1981-09-04	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1984-09-03	1985-03-05	1985-09-04	$7700.00	Window Closed / Lapsed

Tape recorder with control device for a slide projector

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