Mechanical interlock for double doors

• US 3,174,193 A
• Filed: 03/26/1963
• Issued: 03/23/1965
• Est. Priority Date: 03/26/1963
• Status: Expired due to Term

• Current Assignee: Cloyd D. Smith
• Original Assignee: Cloyd D. Smith
• Inventors: Smith, Cloyd D.
• Application Number:
  US04/267,980
• Time in Patent Office: 728 Days
• US Class Current: 49/68
• CPC Class Codes: E05C 7/002 for sluice doors for nuclear reactors G21C13/0285
• CPC Class Codes: Y10S 292/21 Individually latched double doors
• CPC Class Codes: Y10T 292/0826 Operating means

Claims

1. IN COMBINATION WITH A DOOR FRAME HAVING AN ACCESS OPENING THERETHROUGH AND A DOOR HINGED TO SAID FRAME AT EACH END OF SAID OPENING, A MECHANICAL INTERLOCK COMPRISING:

A PAIR OF LATCH BARS DISPOSED SIDE BY SIDE WITHIN SAID OPENING IN PLANES PARALLEL TO THE CENTRAL AXIS OF SAID OPENING AND EXTENDING LENGTHWISE OF THE OPENING, MEANS PIVOTALLY MOUNTING SAID LATCH BARS INTERMEDIATE THEIR ENDS ON SAID DOOR FRAME FOR ROCKING MOTIO IN SAID PLANES, RESPECTIVELY, EACH LATCH BAR HAVING A TRANSVERSE SHOULDER AT ONE END FACING THE OPPOSITE END OF THE RESPECTIVE LATCH BAR AND SAID LATCH BARS BEING TURNED END FOR END, WHEREBY SAID LATCH SHOULDER OF ONE LATCH BAR IS LOCATED ADJACENT ONE DOOR AND SAID LATCH SHOULDER OF THE OTHER LATCH BAR IS LOCATED ADJACENT THE OTHER DOOR, A KEEPER MOUNTED ON EACH DOOR INCLUDING A FLANGE PROJECTING OUTWARDLY FROM THE RESPECTIVE DOOR AND AN UPSTANDING LIP ALONG THE OUTER EDGE OF THE FLANGE, EACH DOOR BEING MOVABLE BETWEEN AN OPEN POSITION, WHEREIN ITS RESPECTIVE KEEPER IS WITHDRAWN FROM SAID OPENING, AND A CLOSED POSITION, WHEREIN THE FLANGE OF ITS RESPECTIVE KEEPER PROJECTS INTO THE ADJACENT END OF SAID OPENING IN A PLANE SUBSTANTIALLY NORMAL TO SAID FIRST-MENTIONED PLANES AND ENGAGES SAID OPPOSITE END OF ONE LATCH BAR ALONG SAID OUTER EDGE OF THE RESPECTIVE FLANGE, AND SAID LIP OF THE RESPECTIVE KEEPER EXTENDS TOWARD AND IS DISPOSED FOR LATCHING ENGAGEMENT WITH SAID LATCHING SHOULDER OF THE OTHER LATCH BAR UPON ROCKING OF SAID ONE END TO A LATTER BAR TOWARD THE RESPECTIVE KEEPER FLANGE TO A LATCHING POSITION OF THE RESPECTIVE LATCH BAR, SAID ONE END OF EACH LATCH BAR BEING ROCKABLE AWAY FROM ITS RESPECTIVE KEEPER FLANGE TO AN UNLATCHING POSITION OF THE RESPECTIVE LATCH BAR, SAID OPPOSITE END OF EACH LATCH BAR BEING BEVELED, WHEREBY ENGAGEMENT OF SAID OPPOSITE END OF EACH LATCH BAR BY THE ADJACENT KEEPER WHEN THE RESPECTIVE DOOR IS CLOSED ROCKS THE LATCH SHOULDER ON THE RESPECTIVE BAR OUT OF LATCHING ENGAGEMENT WITH THE LIP OF THE OTHER KEEPER, THEREBY TO RELEASE THE OPPOSITE DOOR FOR OPENING, AND MEANS FOR RESILIENTLY URGING EACH LATCH BAR TO SAID LATCHING POSITION THEREOF.