Lock, Door

Object Name:

Lock, Door

Object ID:

1983.040

Creator:

Nashua Lock Company

Place of Origin:

Nashua, NH

Date:

1834-1892

Description:

Mortise door lock made by Nashua Lock Company, Nashua, NH. Iron and brass. Movable brass latch with angled surface on front. Facing lock plate, latch angles downward to right. Deadbolt below latch is 0.9"h x 0.4"w. Lock mechanism housed in two-piece iron case attached to back of brass lock plate. Case has flat plate on left side. Two flathead screws hold plate in place. Small iron protuberances on cover plate that fit into top and bottom back corners of lock case. Near top and back of lock case is hole, 0.6" diameter. Inside hole is round insert with square hole in center. Square hole 0.3" on a side. Keyhole below round hole near bottom edge of case that has circular hole at top and narrow, slightly triangular slot below it. On left side of lock is rectangular hole in cover piece that allows latch to slide backward in it. Latch has relieved area on its left side where it passes into lock case. Lock plate has smooth finish front surface with countersunk hole at top and bottom edges. Screw hole diameter: ~0.2". Stamp on brass surface on left side of lock plate near top facing to right: "NASHUA / LOCK Co."

Material:

Metal
Iron
Brass

Dimensions:

H-6.3 W-0.9 D-4.3 inches

Credit Line:

Gift of Nat Figures

Subjects:

Locking devices