Electrical switch devices
AssigneeRanco Incorporated
InventorGuglielmo Rossi
Life of this patent
Estimating the term…
Abstract
An electrical snap acting switch is calibrated by deforming an unsupported part of a terminal strip which carries a fixed contact after assembly of the switch device, to predetermine the operating point of the switch contacts. Deformation of the fixed contact support strip is facilitated by apertures in the strip on opposite sides of the fixed contact. These apertures also serve to ventilate the make and break zone of the contacts to assist in ozone dispersal from this zone, minimizing arcing.
Claims8
A snap acting switch device comprising a base, a fixed contact carried by a support member anchored to said base, a movable contact carried by a snap spring element, and an operating element acting upon the spring element, said support member being rigid but deformable, and comprising a terminal strip anchored to the base at two spaced apart positions between which the said strip is unsupported and deformable, said fixed contact carried by the said unsupported part of the terminal strip, and said unsupported part of the terminal strip having a predetermined deformation which determines the operating point of the switch contacts upon displacement of the operating element in the contact-opening direction.
A snap acting switch device comprising a supporting base defining an opening along one side, a fixed contact carried by a contact support member adjacent said opening, a movable contact, a snap spring element supporting said movable contact for movement into and away from engagement with said fixed contact, and an operating element acting upon said snap spring element for effecting movement thereof, said contact support member anchored to said base at two spaced apart locations and defining an unsupported contact carrying section extending between said locations, said contact carrying section defining passages extending therethrough adjacent opposite sides of said fixed contact, said passages effective to enable yielding deformation of said contact carrying section to determine the operating point of the switch contacts and to establish a flow path for air adjacent said contacts for ventilating the region adjacent the contacts.
Dependencies are inferred from the claim text.