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Scientific American, Vol. 91, No. 22 (November 1904) (1904)

leaf 12

An illustration from Scientific American, Vol. 91, No. 22 (November 1904), 1904, leaf 12
e door or at somehiding-place designated by the customer. The milk isthus liable to be stolen if the hiding place is discoveredby an unauthorized person. To remedy this evil thejar-lock illustrated herewith has been invented. Itconsists of a plate formed with a central opening toadmit the neck of… … MILK-JAR LOCK. while at the inner end is a lever, the tip of which pro-jects into the aperture when the device is in locked po-sition. The lower end of this lever carries a catchadapted to be engaged by a tumbler in the lock whichis mounted on the main bracket of the device. Normal-ly the lever is…

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