Selective stop device for a multi channel frequency switch
AssigneeEricsson GE Mobile Communications Inc.
InventorRoy F. Hodsdon
Life of this patent
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Abstract
A radio transceiver unit is provided which comprises a housing, a radio unit mounted within the housing; a frequency switch mounted within the housing and including a shaft extending above a top plate of the housing, the frequency switch permitting the unit to operate at any of a predetermined number of frequencies. A frequency selector knob is rotatably mounted on the shaft for indexing the frequency switch to any one of the predetermined frequencies, and a stop device is provided for limiting rotation of the knob to any consecutive series of the frequencies from 1 up to and including a maximum available number less one.
Claims22
In a radio transceiver unit which is enclosed within a housing;
- a frequency switch mounted within a wall of said housing and a rotatable knob accessible from outside the housing for indexing the switch to a plurality of predetermined frequencies in a range from one to n, the knob having a frequency indicator thereon, and the housing having frequency indicating indicia thereon, the improvement comprising:
- removable and adjustable stop means interposed between said switch and said knob and selectively engageable with means provided on an external surface of said wall of said housing for selectively limiting rotation of said knob to any consecutive series of said predetermined frequencies from one to n-1, thereby permitting external setting of a frequency capability of the unit.
A radio transceiver unit comprising a housing;
- a radio unit mounted within said housing;
- a frequency switch mounted within said housing and including a shaft extending above a top plate of said housing. said frequency switch permitting said unit to operate at any of a predetermined number of frequencies;
- a frequency selector knob rotatably and removably mounted on said shaft exteriorly of said housing for indexing said frequency switch to any one of said predetermined frequencies;
- and
- adjustable stop means external of said frequency switch and cooperable with elements formed in an external surface of said top plate of said housing for limiting rotation of said knob to select any consecutive series of said frequencies from one up to and including a maximum available number less one, thereby permitting external setting of a frequency capability of the unit.
In a radio transceiver unit enclosed within a housing including a frequency selector switch and a frequency selector knob removably mounted on said switch exteriorly of said housing, wherein the switch has a maximum frequency selection capability, the improvement comprising an adjustable stop mechanism insertable between said knob and said switch within a recess formed in an exterior wall surface of said housing, said stop mechanism and said recess having respective pluralities of cooperable teeth for selectively limiting rotation of the frequency selector knob to a predetermined number of frequencies less than said maximum frequency selection capability of said switch, whereby, upon removal of said knob, a frequency capability may be set without opening said housing.
In a radio transceiver unit which is enclosed within a housing having a substantially flat plate, a frequency switch mounted within said flat plate and a rotatable and removable knob external of said housing for indexing the switch to a plurality of predetermined frequencies from one to n, the knob having a frequency indicator thereon, and the flat plate having frequency indicating indicia thereon, the improvement comprising:
- adjustable stop means interposed between said switch and said knob and selectively engageable with first means provided on said flat plate of said housing and second means provided on an external surface of said knob for selectively limiting rotation of said knob to any consecutive series of said predetermined frequencies from one to n-1 to thereby permit external setting of a predetermined transceiver unit frequency capability.
Dependencies are inferred from the claim text.