Retractable safety bolt for door leaf

Details Retractable safety bolt for door leaf Retractable safety bolt for door leaf

1973-09-18

1976-10-19

Frazier, Roy D.

Closure fasteners

Bolts

Multiple

70107, E05C 106

Patent

active

039867390

ABSTRACT:
Device for controlling means of maintaining a door leaf in its casing, including, in addition to a conventional bolt, a section extending over the height of the outer edge of the leaf and introduced for the locked closure of the door into a matching groove in the casing, said section being disengageable by a horizontal translation movement for unlocking, wherein a handle, starting from the locked position, enables the flat section or safety bolt to be disengaged during a first rotation phase and the conventional or latch bolt to be retracted during a subsequent phase.
Said device also comprising a rotary disk that can be operated by handles for driving, on one hand, the bolt extending over the height of the door and, on the other hand, the latch bolt, under control of a main lock, together with a secondary lock suitable for driving the latch bolt, the latter being integral with a shoulder type plate, said disk being cut-out in such a way that, by cooperating with the shoulder of the plate, it enables the latch bolt to be directly actuated.

REFERENCES:
patent: 3660940 (1972-05-01), Tavano
patent: 3672714 (1972-06-01), Schultz

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