Abstract: The slide handler is an instrument that automatically transfers glass microscope slides from a cassette or magazine to a motorized microscope stage and then returns the slide back into the second cassette. The use of this instrument permits the unattended computer control, measurement and inspection of specimens mounted to the slides. Full modular integration of the system components allows for the slide handler instrument to be utilized with any microscope. The instrument system has a minimum of three components; namely a slide cassette indexer, an XY-stage, and a slide exchange arm. The indexer, the arm and the XY-stage are connected together and integrated into one unitary modular instrument that can be moved from one microscope to another.

Abstract: A control system (10) is built with functional modules expandable system, usually containing electronic circuit boards (24). The packaging of the modules allow a variable number of modules to be vertically stacked together to form a variably sized control system. There is a module having a housing which engages the housing of an abutting module in a physically locked relationship, based upon four locking elements. There are modular units (16, 18, 20) which can be joined vertically by having two interlocking control units in the front of each module and two interlocking control units in the back of each module. Placed above the uppermost intermediate module is a top module (12) for the control unit. Placed below the lowermost intermediate module is a bottom module (14) for the control unit.