Audiovisual system with improved moving light pointer

Details Audiovisual system with improved moving light pointer Audiovisual system with improved moving light pointer

1980-01-24

1981-09-29

Shepperd, John W.

Optics: image projectors

Pointer

353 15, 318568, G03B 2100, G03B 3100

Patent

active

042919541

ABSTRACT:
Apparatus for projecting a highlighting spot on a projected image. When an operator uses an actuator for controlling the position of the highlighting spot, position control signals are applied to a servomechanism to position the highlighting spot in two axes. Simultaneously, the apparatus converts the control signals into a second form suitable for recording on a tape or other media in a control track simultaneously with an oral program on an audio track. The recorded control signals are converted back into a form corresponding to signals from the actuator thereby to control slide changes and the highlighting spot position.

REFERENCES:
patent: 1119597 (1914-12-01), Henry
patent: 2848922 (1958-08-01), Field
patent: 3220305 (1965-11-01), Gelder et al.
patent: 3472585 (1969-10-01), Halberg et al.
patent: 3513370 (1970-05-01), Pullen
patent: 3552037 (1971-01-01), Stern
patent: 3683402 (1972-08-01), Parnell
patent: 3717893 (1973-02-01), Carlson
patent: 3760254 (1973-09-01), Hardway
patent: 3799663 (1974-03-01), Barre et al.
patent: 3802614 (1974-04-01), Russell et al.
patent: 3804503 (1974-04-01), Sissom
patent: 3807846 (1974-04-01), Swank
patent: 3807851 (1974-04-01), Knox et al.
patent: 3832050 (1974-08-01), Johannsen
patent: 3844649 (1974-10-01), Walter et al.
patent: 3885867 (1975-05-01), Nelson et al.
patent: 3897146 (1975-07-01), Smith
patent: 3924122 (1975-12-01), Russell et al.
patent: 3928796 (1975-12-01), Kadaer
patent: 4060318 (1977-11-01), Hansford
patent: 4146314 (1979-03-01), Wilson

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