Interchangeable control panels and keypads for radio transceivers and related process

• US 5,146,615 A
• Filed: 08/07/1989
• Issued: 09/08/1992
• Est. Priority Date: 08/07/1989
• Status: Expired due to Term

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Hodsdon, Roy F., Dickson, Douglas M.
• Primary Examiner(s): Kuntz, Curtis
• Assistant Examiner(s): Urban, Edward
• Application Number:
  US07/390,254
• Time in Patent Office: 1,128 Days
• Field of Search: 455/89, 455/90, 455/128, 455/347, 455/348, 455/349, 455/351, 455/343, 200/309, 340/711, 341/22, 341/23
• US Class Current: 455/90.3
• CPC Class Codes: H01H 2221/002 integral with membrane
• CPC Class Codes: H01H 2221/056 Modular conception
• CPC Class Codes: H01H 2221/066 replaceable
• CPC Class Codes: H01H 2223/034 Bezel
• CPC Class Codes: H04B 1/3833 Hand-held transceivers
• CPC Class Codes: H04B 2001/3894 Waterproofing of transmission device
• CPC Class Codes: H04M 1/0254 comprising one or a plurality of mechanically detachable modules
• CPC Class Codes: H04M 1/0283 for providing a decorative aspect, e.g. customization of casings, exchangeable faceplate
• CPC Class Codes: H04M 1/7246 by connection of exchangeable housing parts

Abstract

A radio transceiver comprising a housing including a front cover, a plurality of interchangeable control panels adapted for selective alternative attachment to the front cover, and a plurality of interchangeable keypads adapted for selective alternative attachment to the front cover in underlying relationship with a respective one of the control panels, wherein each control panel is configured for use with a similarly configured one of the keypads. Each of the control panels comprises a relatively thin planar member having front and rear faces and defined by upper, lower and a pair of side edges, and includes a projection or locking bar extending along and away from the upper edge, and fastening means located adjacent the lower edge. A standardized electronic circuit board is provided within the unit, some or all of the switches included on the circuit being accessible, depending on the particular keypad and control panel employed.

Claims

1. A method of configuring an other wise standardized radio transceiver unit to one of a plurality of specific model designations, each with a different capability, the transceiver unit including a housing, the housing having a front cover for receiving a keypad formed with a plurality of keys and a control panel formed with apertures corresponding in number and arrangement to said keys, and a circuit board within said housing, said circuit board including a maximum number of switches arrayed thereon, said maximum number corresponding to one model designation of highest capability, said switches which are individually and directly accessible by individual ones of said keys, the method comprising the steps of:

a) providing a plurality of flexible keypads having varying numbers to keys equal to or less than said maximum number of switches, the keys of each keypad located and arranged to access respective ones of said switches;

b) providing a plurality of control panels, each having a plurality of apertures, wherein each keypad has an associated control panel with apertures arranged to receive the keys of a respective keypad; and

c) selecting a keypad and associated control panel which permits access to a predetermined number of said switches, so that said standardized transceiver unit can be configured to said one model designation of highest capability or other model designations of lesser capability without altering said circuit board.

2. The method of claim 1 wherein said transceiver unit is a sixteen channel capacity unit, and wherein step (c) is carried out to configure said unit as a lesser channel capacity unit.

3. The method of claim 1 wherein said keys of said keypads are provided with carbon buttons for engaging corresponding switches on said circuit board.

4. The method of claim 1 wherein each control panel includes a relatively thin, planar member having front and rear faces and defined by upper, lower and a pair of side edges, and fastening means for securing said control panel to the housing including a locking bar located along one of said edges and extending in a direction away form said front face and projecting out of a plane containing said rear face, said locking bar configured to engage a recess in said housing, said fastening means further including at least one fastener receiving hole located adjacent another of said edges, opposite said one edge, and wherein, following step c) said selected keypad and control panel are secured to said housing.