Resources Contact Us Home
Door latch with lock

Image Number 2 for United States Patent #4524590.

The door latch with lock includes a support bracket adapted to be mounted on the interior surface of an outer screen or storm door, an elongated bolt slideably and rotatably carried in a guideway on the support bracket, and a transversely extending handle on the bolt which extends through a slot in the guideway and is somewhat longer than the spacing between the outer door and an inner door. When the handle is in a generally horizontal sliding position, the bolt slides freely between a latched position wherein the outer end is received in a keeper on the door frame and an unlatched position wherein the bolt is retracted from the keeper. The bolt and handle can be rotated downwardly to a general vertical locking position when the bolt is in either the latched or unlatched positions, but lock means and actuating means prevent the sliding of the bolt between the latched and unlatched positions unless the handle is rotated to the sliding position. The handle cannot be rotated to the sliding position for unlatching the bolt any time the inner door is closed. The actuation means responds to the lock means to move the bolt between the latched and unlatched position when the bolt and handle are in the locking position.

  Recently Added Patents
Cache memory control device, semiconductor integrated circuit, and cache memory control method
System and method for infrared dongle
Management of computer-file sharing between at least two devices
LED driving circuit, LED illumination appliance, LED illuminator, and LED illumination system
Frothable aqueous composition for use in a carpet backing composition
High order continuous time filter
Nucleic acid sequences encoding strictosidine synthase proteins
  Randomly Featured Patents
Spinner type bait with a movable fish hook in a rattling chamber
Internal-combustion engine with hydraulic system for variable operation of the valves and means for compensating variations in volume of the hydraulic fluid
Internal-combustion engine with an electronically controlled hydraulic system for actuation of the valves and means for compensating changes in the operating conditions of the hydraulic
Organic EL light source
Black-and-white diffractive subtractive light filter
Method of manufacturing magnetoresistive element, magnetoresistive element, magnetic head assembly and magnetic recording apparatus
Process for preparing 2-(4-hydroxyphenoxy) alkanoic acid compounds
Method for simplifying display of complex network connections through partial overlap of connections in displayed segments
Lever latch ring for securing a cover panel to a container
Integrated circuit having an antifuse and a method of manufacture