Combination locks and dial-indexing spring therefor
AssigneePresto Lock Company, Division of Walter Kidde & Company, Inc.
InventorRudolf Wingert
Life of this patent
Estimating the term…
Abstract
A pair of combination locks is employed to hold the lid of a luggage case cked closed, with a left-hand lock operating as a mirror image of a right-hand lock. Principal parts of the locks, including improved dial-indexing springs (but not the dials) are interchangeable. The dial-indexing springs cooperate with the dials of left-hand and right-hand locks in the same manner, so that all of the dials have the same action.
Claims11
In a combination lock having a shaft, a plurality of combination dials supported for rotation on the shaft, each dial having combination indicia spaced about its periphery and having indexing members spaced about its periphery and disposed so that an indexing member is located between each pair of successive indicia, and latch means operable to an open position only when the dials are turned to a predetermined orientation, the improvement comprising dial-indexing spring means including a base, and a pair of resilient arms for each of the dials, respectively, the arms of each pair originating at opposite edge regions of the base and extending away from said opposite edge regions of the base toward each other and toward the periphery of the corresponding dial and having free ends engaging indexing members, respectively, of the corresponding dial.
A dial spring for a combination lock of the type having a shaft, a plurality of combination dials supported for rotation on the shaft, each having combination indicia spaced about its periphery and having indexing members spaced about its periphery and disposed so that an indexing member is located between each pair of successive indicia, and latch means operable to an open position only when the dials are turned to a predetermined orientation, said spring comprising a generally rectangular sheet of spring metal including a base from which successive pairs of arms extend for cooperation with successive dials, respectively, the arms of each pair originating at opposite edge regions of the base and extending away from said opposite edge regions of the base and toward each other and having spaced free ends adapted to engage associated indexing members of a corresponding dial.
For use on a luggage case to hold a lid of the case locked closed, left and right combination locks, each lock having a housing, a shaft supported in the housing, a plurality of combination dials supported for rotation on the shaft, each dial having sequential combination indicia spaced about its periphery and having indexing notches spaced about its periphery and disposed so that an indexing notch is located between each pair of successive indicia, the housing having slots through which corresponding dials protrude and through which the combination indicia of the dials are exposed to view, the combination indicia of the dials of both locks having the same viewing orientation and having the same sequence as the dials are turned in the same direction, each lock having latch means operable by a manual actuator to an open position only when the dials are turned to a predetermined orientation, the latch means of the left and right locks, as perceived by the user, operating as mirror images of each other but comprising parts that are substantially identical, the locks also having substantially identical dial-indexing springs, each including a generally rectangular base, and a pair of resilient arms for each of the dials, respectively, the arms of each pair originating at opposite edge regions of the base and extending away from said opposite edge regions of the base toward each other and toward the periphery of the corresponding dial and having free ends engaging successive indexing notches of the corresponding dial.
Dependencies are inferred from the claim text.