Color receiver having separate color and monochrome displays

Claim 1

A COMPATIBLE TELEVISION RECEIVER FOR RECEIVING BLACK AND WHITE TELEVISION SIGNALS AND COLOR TELEVISION SIGNALS COMPRISING CHROMINANCE INFORMATION MODULATING A SUBCARRIER WAVE, SAID RECEIVER COMPRISING: COLOR PICTURE REPRODUCING MEANS; BLACK AND WHITE PICTURE REPRODUCING MEANS; OPTICAL MEANS FOR COMBINING THE IMAGES RESPECTIVELY PROVIDED BY SAID PICTURE REPRODUCING MEANS; A FIRST CHANNEL FOR SAID COLOR PICTURE REPRODUCING MEANS; A SECOND CHANNEL FOR SAID BLACK AND WHITE PICTURE REPRODUCING MEANS; MEANS FOR DERIVING FROM SAID BLACK AND WHITE SIGNALS A RELATIVELY WIDE-BAND LUMINANCE SIGNAL; MEANS FOR BLOCKING SAID FIRST CHANNEL; MEANS FOR APPLYING SAID WIDE-BAND LUMINANCE SIGNAL TO SAID SECOND CHANNEL; MEANS FOR DERIVING FROM SAID COLOR TELEVISION SIGNALS A SIGNAL AT SAID SUBCARRIER FREQUENCY, COLOR VIDEO SIGNALS AND A RELATIVELY NARROW-BAND LUMINANCE SIGNAL; MEANS FOR DERIVING FROM SAID SIGNAL AT SAID SUBCARRIER FREQUENCY A CONTROL SIGNAL; SWITCHING MEANS COMMON TO BOTH SAID CHANNELS FOR UNBLOCKING SAID FIRST CHANNEL AND APPLYING SAID COLOR VIDEO SIGNALS TO SAID FIRST CHANNEL, AND FOR APPLYING SAID RELATIVELY NARROW-BAND LUMINANCE SIGNAL TO SAID SECOND CHANNEL, SAID SWITCHING MEANS HAVING A CONTROL INPUT; AND MEANS FOR APPLYING SAID CONTROL SIGNAL TO SAID CONTROL INPUT.