Browse Prior Art Database

Indexing Disk Teaching Machine

IP.com Disclosure Number: IPCOM000091098D
Original Publication Date: 1969-Oct-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 61K

Publishing Venue

IBM

Related People

Davidge, RV: AUTHOR [+4]

Abstract

This teaching machine utilizes a multigroove stylus record. This has transparencies around its periphery which are projected on a screen. Audio information, related to the displayed visual information, is transduced from a selected groove. Indexing control devices effect fixed indexing of the visual and audio material in accordance with student responses and in accordance with program information located on the record. Record 11 having transparencies 13 located on its outer periphery rests on an indexable turntable not shown. Lamp 15 and lens 17 effect the projection of the image of transparency 13 onto a screen. not shown, for student viewing. Each transparency 13 has a corresponding spiral audio groove 19 associated with it.

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Indexing Disk Teaching Machine

This teaching machine utilizes a multigroove stylus record. This has transparencies around its periphery which are projected on a screen. Audio information, related to the displayed visual information, is transduced from a selected groove. Indexing control devices effect fixed indexing of the visual and audio material in accordance with student responses and in accordance with program information located on the record. Record 11 having transparencies 13 located on its outer periphery rests on an indexable turntable not shown. Lamp 15 and lens 17 effect the projection of the image of transparency 13 onto a screen. not shown, for student viewing. Each transparency 13 has a corresponding spiral audio groove 19 associated with it.

Record 11 is rotated by the turntable to a desired position as sensed by magnetic transducer 21 and then remains stationary. The desired image is projected on the screen and the playback mechanism is rotationally driven by shaft 23 in the direction of arrow 25. Crank 27, attached to shaft 23, pulls pickup arm 29 around the record by a pivoting block 31. Stylus 33 rides in one of the record grooves 19 which is modulated with an audio signal to be reproduced by conventional techniques. Arm 29 is swept inward by the groove and then raised by rotation by torque bar 35 in the direction or arrow 37. Bar 35 bar moves latch 39, mounted by bracket 41, below tab 42a of cam follower 42, releasing the follower so that it...