Dual action safety latch for stove door

Details Dual action safety latch for stove door Dual action safety latch for stove door

1979-03-05

1980-12-02

Scott, Samuel

Stoves and furnaces

Stove doors and windows

Latches

292238, 292340, F24C 1504, E05C 304, E05C 302

Patent

active

042365015

ABSTRACT:
A latch for a door of a substantially airtight solid-fuel stove, whose operation requires that before full opening of the stove door can be accomplished the door be positioned in a partially opened position while the latch is being manipulated. A latch dog normally engages a wedge to hold the door fully closed, and a limit stop allows a first rotation of the latch mechanism to disengage the dog from the wedge but prevents rotation sufficient to allow the latch dog to clear the edge of the doorway opening. A space defined between the wedge and the front of the stove permits the latch dog to pass between the wedge and the front of the stove during a second rotation of the latch mechanism, in the opposite direction, to a position allowing full opening of the stove door. During this second motion of the latch mechanism the door is partially opened, allowing sufficient air to enter the combustion chamber to establish normal convective draft currents and prevent backpuffing and expulsion of smoke and flame.

REFERENCES:
patent: 1945156 (1934-01-01), Moore
patent: 2094547 (1937-09-01), McCulloch
patent: 2955859 (1960-10-01), Krause
patent: 4157704 (1979-06-01), Zimmer

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