Cueing device for phonographs

A cueing device for a phonograph having a rotatable turntable for supporting a grooved phonograph record having recorded zones alternating with unrecorded zones,

• said cueing device comprising a tone arm having a transducer thereon with a stylus for following the grooves of the record,
• pivot means supporting said tone arm for swinging movement toward and away from the record and also for swinging movement along the face of the record,
• said stylus being disposed in a tangential perpendicular plane which is generally tangential to the grooves of the record and generally perpendicular to the face of the record,
• a light source mounted on said tone arm for directing light at an inclined angle upon the face of the record adjacent said tone arm,
• said light being reflected at an oppositely inclined angle from the face of the record,
• a photoelectric device mounted on said tone arm for receiving such light after being reflected from the face of the record and for producing electrical signals corresponding to the reflected light,
• said light source, said photoelectric device and the path of the light therebetween being in a transverse generally perpendicular plane which is transverse to said tangential perpendicular plane and also transverse to the grooves of the record,
• a polarized light transmitting device disposed in the path of the light between the face of the record and said photoelectric device,
• said polarized light transmitting device being oriented to favor the transmission of light polarized in a plane transverse to said transverse generally perpendicular plane of the light path,
• and utilization means connected to said photoelectric device for performing at least one control function in response to the changing signals from said photoelectric device produced by the transitions between the recorded and the unrecorded zones of the record.

A cueing device for a phonograph having a rotatable turn table for supporting a grooved phonograph record having recorded zones alternating with unrecorded zones,

• said cueing device comprising a movable pickup having a transducer thereon with a stylus for following the grooves of the record,
• a light source mounted on said pickup for directing light at an inclined angle upon the face of the record adjacent said pickup,
• said light being reflected at an oppositely inclined angle from the face of the record,
• a photoelectric device mounted on said pickup for receiving such light after being reflected from the face of the record and for producing electrical signals corresponding to the reflected light,
• said light source, said photoelectric device and the path of the light therebetween being in a transverse generally perpendicular plane which is transverse to the grooves of the record and generally perpendicular to the face of the record,
• a polarized light transmitting device disposed in the path of the light between the face of the record and said photoelectric device,
• said polarized light transmitting device being oriented to favor the transmission of light polarized in a plane of the light path,
• and utilization means connected to said photoelectric device for performing at least one control function in response to the changing signals from said photoelectric device produced by the transitions between the recorded and the unrecorded zones of the record.

A cueing device for a phonograph having a rotatable turntable for supporting a grooved phonograph record having recorded zones alternating with unrecorded zones,

• said cueing device comprising a movable pickup having a transducer thereon with a stylus for following the grooves of the record,
• a light source mounted on said pickup for directing light at an inclined angle upon the face of the record adjacent the pickup,
• said light being reflected at an oppositely inclined angle from the face of the record,
• a photoelectric device mounted on said pickup for receiving such light after being reflected from the face of the record and for producing electrical signals corresponding to the reflected light,
• said light source, said photoelectric device and the path of the light therebetween being in a transverse generally perpendicular plane which is transverse to the grooves of the record and generally perpendicular to the face of the record,
• means on said pickup forming a slit interposed between the record and said photoelectric device,
• said slit having its longer dimension oriented transversely to said transverse generally perpendicular plane of the light path,
• and utilization means connected to said photoelectric device for performing at least one control function in response to the changing signals from said photoelectric device produced by the transitions between the recorded and the unrecorded zones of the record.

A cueing device for a phonograph having a rotatable turntable for supporting a grooved phonograph record having recorded zones alternating with unrecorded zones,

• said cueing device comprising a movable pickup having a transducer thereon with a stylus for following the grooves of the record,
• a light source mounted on said pickup for directing light at an inclined angle upon the face of the record adjacent said pickup,
• said light being reflected at an oppositely inclined angle from the face of the record,
• a first photoelectric device mounted on said pickup for receiving such light after being reflected from the face of the record and for producing a first electrical signal corresponding to the reflected light,
• first utilization means connected to said first photoelectric device for performing a cueing function in response to changes in the signal from said first photoelectric device,
• a second photoelectric device mounted on said pickup for receiving the reflected light from the face of the record and for producing a second electrical signal corresponding to the reflected light,
• said second photoelectric device being closer to said light source than said first photoelectric device,
• and second utilization means connected to said second photoelectric device for performing an end of play function in response to changes in the signal from said second photoelectric device.

A cueing device for a phonograph having a rotatable turntable for supporting a grooved phonograph record having recorded zones alternating with unrecorded zones,

• said cueing device comprising a movable pickup having a transducer thereon with a stylus for following the grooves of the record,
• a light source mounted on said pickup for directing light at an inclined angle upon the face of the record adjacent the pickup,
• said light being reflected at an oppositely inclined angle from the unrecorded zones of the record and to a lesser extent from the recorded zones,
• a first photoelectric device mounted on said pickup for receiving such light after being reflected from the face of the record and for producing a first electrical signal corresponding to the reflected light,
• said light source, said first photoelectric device and the path of the light therebetween being in a transverse generally perpendicular plane which is transverse to the grooves of the record where engaged by the stylus and generally perpendicular to the face of the record,
• a first utilization device connected to said first photoelectric device for performing the cueing function,
• a second photoelectric device mounted on said pickup for receiving reflected light from the face of the record and for producing a second electrical signal corresponding to the reflected light,
• and a second utilization device connected to said second photoelectric device for performing an end of play function in response to the electrical signals from said second photoelectric device,
• said first and second photoelectric devices being aimed in generally parallel inclined directions,
• said second photoelectric device being disposed substantially in said transverse generally perpendicular plane,
• said second photoelectric device being closer than said first photoelectric device to said light source and being operative to receive reflected light from each unrecorded zone as the stylus completes the play of the preceding recorded zone,
• said first photoelectric device being operative to receive reflected light from each unrecorded zone when the stylus is opposite such zone and spaced therefrom at a cueing distance.