G - Physics – 03 – B
Patent
G - Physics
03
B
88/63
G03B 31/00 (2006.01) G03B 31/06 (2006.01)
Patent
CA 1142001
A projector control system normally comprises automatic slide projectors, a dissolver unit, a cassette recorder unit, and a remote control unit. The cassette recorder unit has two tracks, one for the audio, and the other for the sync. signals. Such projector control system can be used to control manually through a control switch of a dissolver unit either the programmation of sync. signals accompa- nying an audio-track which would have been preniously re- corded for dissolve slide-sound presentation or it can also be used to control manually the operation of dissolve slide presentation only. This last operation can also be performed manually through a remote control unit. In this invention, an automatic unit is used with the projector control system to control auto- matically all operations desired. For instance, the pro- grammation of the sync. signals of the dissolve slide- sound presentation can be controlled automatically by means of the automatic unit. This is achieved by connec- ting the automatic unit to the manual control switch of the dissolver unit. The dissolve slide presentation without sound can also be controlled automatically in the same manner. The automatic unit can also be connected directly to the remote control switch in order to control automa- tically in the same manner the projector control system. The automatic unit consists essentially of an IC timer type 555 which produces an electical pulse of a duration corresponding to a desired time interval; a general purpose operational amplifier type 741 which reverses the electrical pulse to give an instant electri- cal pulse at every desired time interval, and a miniature SPDT relay which controls automatically all operations of the projector control system. - 2 -
373639
LandOfFree
Automatic unit to control both programming dissolve... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Automatic unit to control both programming dissolve..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic unit to control both programming dissolve... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-538875