Browse Prior Art Database

Film Exhibit Controller

IP.com Disclosure Number: IPCOM000076085D
Original Publication Date: 1972-Jan-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 57K

Publishing Venue

IBM

Related People

Dingwall, RP: AUTHOR [+2]

Abstract

Shown in Fig. 1 is a control system for controlling the operation of a plurality of film, e.g., slide, projectors.

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Film Exhibit Controller

Shown in Fig. 1 is a control system for controlling the operation of a plurality of film, e.g., slide, projectors.

The controller itself is a film, e.g. slide, projector 1 which projects program slides 2 (see also Fig. 2) onto an array of photocells.3 from which signals are derived to control the exhibit devices. In this embodiment, the system is shown employed for control of a sequential slide show which utilizes nine slide projectors 4. Although the photocell array 3 can be arranged in any convenient form, in the specific form shown the photocell array employs, as shown in Fig. 2, ten rows of cells with each row having ten cells. Each row constitutes a "Program Step". The nine driven projectors are then controlled by nine of the photocells. The tenth cell in each step is a control cell. With this control cell lighted, the other nine cells are employed for special controls such as advancing the control projector.

After scanning one row of photocells, the scanning is then advanced to the next row. At the completion of the tenth row, the control projector 1 is automatically advanced to the next program slide. As previously noted, the controller can also be advanced as a result of a "Control Cell" in one of the prior program steps.

The number of photocells per row and the number of rows (or steps) per slide can be increased several fold. With a control system as shown utilizing a slide projector 3 with a capacity of 80 slides, a program can...