Notes and Queries

1898 Scientific American  
having a knuckle connection. The lower member of each hinge is secured to the npper portion of the door, the uppe· r member of each hinge being attached to the eM riage. A rod connects a lift-lever fulcrumed npon the door with the carris ge. A bolt held to slide and rock upon the door is provided with a lateral cam projection adapted to engage the door when the bolt IS rotated. A keeper is provided for the bolt independently of the door and also a locking device for the bolt. The device is ap
more » ... The device is ap plicable to freight cars, barm, refrigerators, etc. Designs.
doi:10.1038/scientificamerican07091898-29a fatcat:q3trg4kshbam5hocmhbo2tg3j4