| 摘要 |
A keypad including a keypad housing an array of data entry key assemblies mounted in the keypad housing, each of the data entry key assemblies being designated by at least two indices and including at least two mutually electrically insulated electrical contacts, each electrical contact being identified by one of the at least two indices and an electrically conductive element which, when depressed, is electrically coupled to the at least two mutually electrically insulated electrical contacts and an electrical circuit coupled to the array of data entry key assemblies, sensing a voltage state of specific ones of the at least two mutually electrically insulated electrical contacts, identified by specific ones of the indices, caused by depression of a specific electrically conductive element and indicating by the at least two indices the identity of a specific one of the data entry key assemblies which is actuated. |
| 主权项 |
1. A keypad comprising:
a keypad housing; an array of data entry key assemblies mounted in said keypad housing, each of said data entry key assemblies being designated by at least two indices and comprising:
at least two mutually electrically insulated electrical contacts, each electrical contact being identified by one of said at least two indices; andan electrically conductive element which, when depressed, is electrically coupled to said at least two mutually electrically insulated electrical contacts; and an electrical circuit coupled to said array of data entry key assemblies, sensing a voltage state of specific ones of said at least two mutually electrically insulated electrical contacts, identified by specific ones of said indices, caused by depression of a specific electrically conductive element and indicating by said at least two indices the identity of a specific one of said data entry key assemblies which is actuated. |
