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Antique Penn Interior Mortise Lock

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Antique Penn Interior Mortise Lock
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Antique Penn Interior Mortise Lock

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Interior cast iron and solid brass Penn mortise door lock. An interior mortise lock is a lock which is used on an interior door that has been cut with a pocket or hole into which the lock is to be fitted. Interior mortise locks commonly include a doorknob hub, through which a doorknob spindle is installed and doorknobs are mounted on each side and secured into place with pins or set screws; and a keyhole which accommodates an old-fashioned bit or skeleton key which in turn throws the deadbolt to lock and unlock the door. Mortise locks have specific dimensions including backset, the measurement from the edge of the faceplate (the strip that shows when the mortise lock is installed in the door) to the center of the doorknob hub; and spacing, the measurement from the center of the doorknob hub to the center of the round part of the keyhole. The dimensions were not standardized in the 19th century so it is important to note the dimensions of your door prior to purchasing a mortise lock.

In 1877, C. Raymond HEIZMANN and his brother Albert A. HEIZMANN began the manufacture of builders' hardware and specialties of all kinds. The company grew in size until their plant came to cover several acres of ground, their employees number over 1,000. Their goods found a market all over the world. A nail department was added in 1898. The business was incorporated under the name of Penn Hardware Company in 1896.

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