Heat-up/cool-down bimetal timer for electric toaster

In a heat-up/cool-down bimetal timer for an electric toaster wherein the timer includes a rigid body member, a bimetal blade having two end portions with one of the end portions being connected to the rigid body member and the other end portion being a free end portion and, a switch contact located at the free end portion of the bimetal blade arranged for cooperation with a contact that is held in a fixed position on said timer body member, the fixed switch contact being adjustable during manufacture of the timer for precisely setting the time periods of the heat-up/cool-down bimetal timer by setting the distance that the free end portion of the bimetal has to move in order to close the switch contacts which signal the termination of the bimetal timer cool-down cycle and the de-energization of the electric heaters of the toaster, the improvement comprising:

• (a) a calibration adjustment screw having longitudinal axis and a generally cylindrical body portion with screw threads formed thereon, an end portion constituting the manufacturing adjustable switch contact, and a head portion shaped for engagement with calibration equipment for driving the screw to its adjusted position;
• (b) a leaf spring fastener for holding the adjustment screw having two end portions, one end portion being fixed to the rigid body member of said bimetal timer and the other end portion being turned on itself in the general shape of a cylindrical sleeve for contact with the outer periphery of the screw threads;
• (c) said leaf spring fastener being formed from a piece of generally flat spring metal having two generally flat parallel major surfaces and edge surfaces, both of the major flat surfaces being in planes generally parallel to the longitudinal axis of the screw and being arranged generally perpendicular to the major surfaces of the heat-up/cool-down bimetal blade so that said bimetal blade and the contact mounted on the free end portion thereof face an edge surface of said fastener and the direction of movement of equipment for engaging the head of the screw is in a direction toward an edge surface of the fastener so that said fastener will not be deformed when it is being engaged by equipment for adjusting the screw;