Control device for zoom lens systems

• US 3,158,076 A
• Filed: 11/30/1962
• Issued: 11/24/1964
• Est. Priority Date: 11/30/1962
• Status: Expired due to Term

• Current Assignee: Frank G. Back, Willi H. Schrader
• Original Assignee: Frank G. Back, Willi H. Schrader
• Inventors: Back, Frank G., Schrader, Willi H.
• Application Number:
  US04/241,219
• Time in Patent Office: 725 Days
• US Class Current: 359/694
• CPC Class Codes: G02B 7/08 adapted to co-operate with a remote control mechanism
• CPC Class Codes: G03B 17/14 interchangeably

Claims

1. A CONTROL DEVICE FOR A MECHANICALLY COMPENSATED ZOOM LENS SYSTEM HAVING A ROTATABLE BARREL FOR FOCUSING AND A ROTATABLE BARREL FOR DRIVING THE MOVABLE ZOOM LENS ELEMENTS COMPRISING A HOUSING, A LONGITUDINALLY SLIDABLE AND ROTATABLE CONTROL ROD IN SAID HOUSING, A COLLAR PORTION ON SAID CONTROL ROD HAVING A NON-CIRCULAR CROSS-SECTIONAL SHAPE, A FIXED BUSHING JOURNALED WITHIN THE HOUSING TO SLIDABLY RECEIVE THE COLLAR PORTION OF THE ROD AND HAVING A NON-CIRCULAR OPENING THEREIN TO PREVENT ROTATION OF THE COLLAR WITHIN THE BUSHING, A WORM SECTION ON THE CONTROL ROD, A FIRST GEAR MEANS DRIVEN BY THE WORM SECTION PORTION ON THE CONTROL ROD, A RING GEAR SECURED TO THE ROTATABLE ZOOM BARREL AND OPERATIVELY COUPLED TO THE FIRST GEAR MEANS TO ROTATE THE SAID ROTATABLE ZOOM BARREL, A SECOND GEAR MEANS CARRIED BY THE FIXED BUSHING AND RESPONSIVE TO THE ROTARY MOTION OF THE CONTROL ROD, INTERMEDIATE DRIVEN MEANS COUPLED TO THE SECOND GEAR MEANS, AN ELONGATED GEAR ON THE ROTATABLE FOCUSING BARREL AND MEANS INCLUDING THE DRIVEN MEANS TO ROTATE THE ELONGATED GEAR OF THE ROTATABLE FOCUSING BARREL TO FOCUS THE VARIFOCAL LENS SYSTEM.