Automatic searching film reader

• US 3,290,987 A
• Filed: 01/16/1964
• Issued: 12/13/1966
• Est. Priority Date: 01/16/1964
• Status: Expired due to Term

• Current Assignee: Claire L. James, Raymond L. Nelson
• Original Assignee: Claire L. James, Raymond L. Nelson
• Inventors: James, Claire L., Nelson, Raymond L.
• Application Number:
  US04/338,140
• Time in Patent Office: 1,062 Days
• US Class Current: 353/26.00R
• CPC Class Codes: D07B 5/00 Making ropes or cables from special materials or of particular form
• CPC Class Codes: G03B 21/113 Handling roll films

Claims

1. AN AUTOMATIC SEARCHING FILM READER FOR USE WITH A FILM BEARING DOCUMENT IMAGES, DISTINCTIVE OPTICAL CODING BETWEEN ADJACENT SERIES OF IMAGES AND A POSITION MARK ASSOCIATED WITH EACH IMAGE, THE READER COMPRISING:

MEANS FOR DRIVING A FILM AT A RELATIVELY HIGH VELOCITY DURING A SEARCHING OPERATION;

MEANS FOR ILLUMINATING THE CODING AND POSITION MARKS ON THE DRIVEN FILM;

FIRST PHOTOCELL MEANS RECEPTIVE OF LIGHT FLUX FROM THE ILLUMINATED CODING FOR GENERATING SIGNALS IN RESPONSE THERETO;

COMPARISON CIRCUITRY RECEPTIVE OF THE SIGNALS FROM SAID FIRST PHOTOCELL MEANS;

MEANS FOR ENCODING SAID COMPARISON CIRCUITRY TO BE SELECTIVELY RESPONSIVE TO THE SIGNALS GENERATED IN RESPONSE TO A PRESELECTED CODING ON THE FILM AND TO DEVELOP A HIT SIGNAL WHEN SUCH PRESELETED CODING IS DETECTED;

CONTROL MEANS RESPONSIVE TO A HIT SIGNAL FOR DE-ENERGIZING SAID DRIVING MEANS;

OTHER PHOTOCELL MEANS RECEPTIVE OF LIGHT FLUX FROM THE ILLUMINATED POSITION MARKS FOR DETECTING THE POSITION MARKS AS THE FILM OVERRUNS THE POSITION OF THE HIT SIGNAL;

MEANS FOR COUNTING THE POSITION MARKS DETECTED;

AND MEANS FOR DRIVING THE FILM AT A RELATIVELY LOW VELOCITY IN A REVERSE DIRECTION UNTIL THE POSITION MARKS ARE RECOUNTED.