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A mobile telephone adaptable to a variety of specialized capabilities comprises a main unit and a plurality of accessory units, each capable of a different specialized function, each being selectively attachable to the main unit. The main unit has a contoured outer surface and an operating system fo

A mobile telephone adaptable to a variety of specialized capabilities comprises a main unit and a plurality of accessory units, each capable of a different specialized function, each being selectively attachable to the main unit. The main unit has a contoured outer surface and an operating system for operation of the mobile telephone and each accessory unit includes a casing having a contoured outer surface containing specialized electronic components. The casing is selectively releasably attachable to the main unit which, when attached to the main unit, generally conforms to the outer surface of the main unit and lies generally within the profile of the main unit when attached to it. Interface contacts on the main unit and on the accessory unit are mutually engageable when the accessory unit is attached to the main unit for electrically interconnecting the specialized electronic components with the operating system. An attachment device is fixed on the outer surface of the casing for releasable attachment to an article of clothing worn by a user. The interface contacts include an antenna interface, an internal data bus, a battery power interface, and a regulated power interface. The accessory units may include an alarm system, a helical antenna with or without a complementary whip antenna, a flat profile antenna with or without a complementary whip antenna, a dual band antenna with or without filtering, a diversity antenna, and an accessory battery module.

대표청구항 ▼

[ What is claimed is:] [1.] A mobile telephone adaptable to a variety of specialized capabilities comprising:a main unit having a contoured outer surface and including an operating system for operation of the mobile telephone;an accessory unit including a casing having a contoured outer surface and

[ What is claimed is:] [1.] A mobile telephone adaptable to a variety of specialized capabilities comprising:a main unit having a contoured outer surface and including an operating system for operation of the mobile telephone;an accessory unit including a casing having a contoured outer surface and containing specialized electronic component means, said casing being selectively releasably attachable to said main unit which, when attached to said main unit, generally conforms to said outer surface of said main unit and lies generally within the profile of said main unit when attached thereto;interface means including an antenna interface on said main unit and on said accessory unit mutually engageable when said accessory unit is attached to said main unit for electrically interconnecting said specialized electronic component means with said operating system;said specialized electronic component means including:an antenna sheath integral with said casing projecting in a direction away from said outer surface thereof generally parallel to a longitudinal axis of said main unit when said accessory unit is attached thereto;a helical antenna mounted within said antenna sheath and generally aligned therewith;an antenna feed in electrical continuity with said helical antenna and engageable with said antenna interface when said casing is attached to said main unit;an antenna lead electrically connecting said helical antenna to said antenna feed; anda retractable whip antenna concentrically aligned with said helical antenna and mounted on said casing for movement between a retracted position and an extended position, said whip antenna including a contact member disengaged from said antenna lead when said whip antenna is in the retracted position and engaged with said antenna lead when said whip antenna is in the extended position.