Telecommunications – Receiver or analog modulated signal frequency converter – Cabinet – housing – or chassis structure
Patent
1995-12-06
1998-02-24
Mullen, Thomas
Telecommunications
Receiver or analog modulated signal frequency converter
Cabinet, housing, or chassis structure
340573, 343702, H04B 108
Patent
active
057220646
ABSTRACT:
A radio receiver unit for directionally tracking at least one radio transmitter in accordance with the invention includes a housing containing a radio receiver including a directional antenna for receiving radio transmissions from the at least one radio transmitter; a display, which is electrically coupled to the receiver and fixed in position with respect to the housing, for visually displaying a strength of the radio transmissions received by the directional antenna; and a field of view limiter for limiting light emanating from the display to a field of view of the display when a user holds the receiver unit in the user's hand away from the body of the user, the field of view being limited to planes extending upward from a plane of sight extending from the eyes of the user downward and intersecting a horizontal plane extending from the user's waist substantially at arms length of the user.
REFERENCES:
patent: 3683384 (1972-08-01), Warren
patent: 4272765 (1981-06-01), White
patent: 4281404 (1981-07-01), Morrow, Jr. et al.
patent: 4675656 (1987-06-01), Narcisse
patent: 5115224 (1992-05-01), Kostusiak et al.
patent: 5289163 (1994-02-01), Perez et al.
"Safe Child" Child Locator, Yes| Entertainment Corporation, 1994.
Mullen Thomas
NTP Incorporated
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