Electric switches having selectable and adjustable pre-travels
AssigneeCutler-Hammer, Inc.
InventorMerlin R. Dummer
Life of this patent
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Abstract
Trigger operated snap-action switches having selectable and adjustable cam inserts in the trigger arranged for engaging the plunger of a snap-action mechanism to afford selection and adjustment of the pre-travel, and in the case of a double pole switch, to afford simultaneous or sequential closing of the contacts as desired.
Claims20
In an electric switch having a contact mechanism actuated by the camming action of a sliding operator, the improvement comprising a cam insert rigidly mounted in a recessed cavity in the operator and having camming surfaces for determining the actuating point of the contact mechanism relative to operator travel.
In a multi-pole electric switch having contact mechanisms actuated by the camming action of a sliding operator, the improvement comprising a plurality of selectable cam inserts, one for each contact mechanism, rigidly mounted in respective recessed cavities in the operator, each cam insert having selectably oriented camming surfaces for determining the actuating point of a respective contact mechanism relative to operation travel.
An electric switch comprising:
- a housing;
- contact means mounted in said housing and actuatable to effect switching operations;
- an operator mounted to said housing for travel in a path relative thereto;
- and
- cam means rigidly mounted in a recessed cavity in said operator and having a first portion mounting said cam means to said operator within said cavity and having a second portion integral with said first portion and engaging and actuating said contact means at a predetermined point in the path of travel of said operator, said cam means being interchangeable with other cam means having a comparably configured first portion whereby to afford preselection of the operator pre-switching-travel according to choice of a selectably configured second portion.
Dependencies are inferred from the claim text.