Adjustable self-inking stamping device

Abstract

A manually operated self-inking stamping device including a base for contacting material to be stamped, a stamp pad received by the base and having a shaft extending outwardly therethrough, a handle threadedly mounted on the shaft for rotational positioning movement therealong, and a locking member extending between and normally lockingly engaging the handle and the base. A coiled spring is disposed about the shaft between the handle and the locking member to bias the handle and the stamp pad upwardly and to maintain the locking member and the base in engagement. Ordinary operation is achieved by depression of the handle against the biasing of the spring. The engaging surfaces of the locking member and the base are provided respectively with tapered cam teeth configured for normal meshing engagement and for selective relative stepwise indexing movement into and out of meshing engagement upon the application to the handle of a predetermined force for causing rotation thereof, whereby the handle may be adjustably positioned along the shaft to vary its effective length between the handle and the locking member for variance of the exertable stamping pressure.