Entry lock

Details Entry lock Entry lock

1973-07-02

1976-05-11

Taylor, Dennis L.

Movable or removable closures

Convex or concave closure and opening

49 68, E06B 334, E06B 500

Patent

active

039553221

ABSTRACT:
An entry lock for controlled ingress and egress for confined areas such as live animal growing and holding pens is disclosed. The entry lock includes a door opening, first and second doors spaced apart from each other and adapted to swing together about a common axis positioned at a side of the door opening into alternate register with the door opening, and a third door hingedly attached approximate the outside edge of the first or second door and latched approximate the outside edge of the other of the first or second doors forming a confined area or enclosure large enough to accomodate a human. The enclosure is formed by the third door in conjunction with the first and second doors. The structure prevents ingress and egress through the door opening when the first and second doors are swung together into alternate register with the door opening.

REFERENCES:
patent: 475556 (1892-05-01), Hale
patent: 617308 (1899-01-01), Cobb
patent: 1005535 (1911-10-01), Gillespie
patent: 1905547 (1933-04-01), Wood
patent: 2051753 (1936-08-01), Steckly
patent: 2076765 (1937-04-01), Eldred
patent: 3045615 (1962-07-01), Atchison

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