Ranco Inc.

Vincenzo Ferloni

Guglielmo Rossi

A mechanism for setting a thermostat having a housing wall forming a mounting opening. A rotatable setting shaft projects through the mounting opening and defines a circumferential groove concentric with respect to the shaft axis and a cam is fixed to the shaft for rotation therewith relative to the housing wall. The cam has a bore with at least one slot at a predetermined angular location and the shaft is locked to the cam by expanding the shaft into engagement with the bore and slot. The shaft is journaled in a bearing for rotation relative to the housing wall. The bearing comprises at least a collar-like structure fixed with respect to the housing wall and extending axially relative to the shaft and radially inwardly deformed toward engagement with the shaft groove. The collar-like bearing structure and shaft groove cooperate to enable rotation of the shaft relative to the collar-like structure about the axis and to restrain the shaft against axial movement relative to the housing wall. In one embodiment the bearing is integral with the housing while in another embodiment the bearing is formed by an externally threaded tubular member.

Drive arrangement for setting mechanical apparatus, especially

A control switch unit adaptable for a number of different purposes has a fluid-filled flexible-walled capsule acting within a housing on a pivoted operating lever arranged to operate a switch located in the housing on the other side of the pivot axis of the lever from the capsule, the lever being biased by a cam-adjustable tensioning spring acting on the opposite side of the operating lever from the capsule and the switch. Further components such as a manual switch-off control, a pilot lamp operable by an auxiliary switch, or a capsule heater, can be added without rearrangement of the basic unit.

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Lurate, Italy

Vincenzo Ferloni