US4131851A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio-signal receiver with plug-in modules
Assignee: BASF SE
•
Filing: 1976-08-24
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Granted: 1978-12-26
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Expires: 1996-08-24
Abstract
Abstract A receiver for radio signals, comprising an r-f (radio-frequency) unit and an a-f (audio-frequency) unit, the circuit in the a-f unit being interrupted at certain points and the receiver being devised electrically and with respect to its spatial design in such a way that, by changing modules accommodated within the spatial confines of the receiver case, completely different technical versions of the receiver are obtained.
Inventors
- 👤 Wolfgang Martiny
- 👤 Donald H. MacGillavry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:52
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/06; H04B1/08; H05; H05K; H05K7/00; H05K7/02
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
183 words
A radio-signal receiver comprising a radio-frequency portion and also an audio-frequency portion including a basic audio-frequency unit, said radio-frequency portion and said basic audio-frequency unit being mounted in the interior of a common housing, said housing being provided with recess means accessible from the outside of the housing, said recess means, being sealed off from the interior of the housing and receiving at least one modular plug-in unit having the components of one or more auxiliary circuit modules enclosed therein, and said modular unit having thereon a plurality of contacts cooperating with a plurality of mating contacts in said recess means of the housing which are connected to circuit points in said audio-frequency portion, the circuit through at least predetermined ones of said circuit points being normally interrupted and at least one of said enclosed modular plug-in units being provided with linking connections for bridging said predetermined circuit points when said modular unit is inserted into said recess means of said housing, such that said modular unit, upon being plugged in, effectively supplements said basic audio-frequency unit, circuitwise, with said auxiliary circuit module.
Claim 2
Dependent Claim
183 words
A radio-signal receiver comprising a radio-frequency portion and also an audio-frequency portion including a basic audio-frequency unit, said radio-frequency portion and said basic audio-frequency unit being mounted in the interior of a common housing, said housing being provided with recess means accessible from the outside of the housing, said recess means, being sealed off from the interior of the housing and receiving at least one modular plug-in unit having the components of one or more auxiliary circuit modules enclosed therein, and said modular unit having thereon a plurality of contacts cooperating with a plurality of mating contacts in said recess means of the housing which are connected to circuit points in said audio-frequency portion, the circuit through at least predetermined ones of said circuit points being normally interrupted and at least one of said enclosed modular plug-in units being provided with linking connections for bridging said predetermined circuit points when said modular unit is inserted into said recess means of said housing, such that said modular unit, upon being plugged in, effectively supplements said basic audio-frequency unit, circuitwise, with said auxiliary circuit module.
Claim 3
Dependent Claim
16 words
A receiver as claimed in claim 1, wherein said auxiliary circuit module comprises a quadrophonic circuit.
Claim 4
Dependent Claim
17 words
A receiver as claimed in claim 1, wherein said auxiliary circuit module comprises a noise suppression circuit.
Claim 5
Dependent Claim
17 words
A receiver as claimed in claim 1, wherein said auxiliary circuit module comprises a stereo fan-out circuit.
Claim 6
Dependent Claim
16 words
A receiver as claimed in claim 1, wherein said auxiliary circuit module comprises an echo device.
Claim 7
Dependent Claim
34 words
A receiver as claimed in claim 1, wherein said first-mentioned contacts are provided substantially at an end face of said modular unit and said mating contacts substantially at the bottom of said recess means.
Claim 8
Dependent Claim
17 words
A receiver as claimed in claim 6, wherein said mating contacts are provided in the receiver chassis.
Claim 9
Dependent Claim
19 words
A receiver as claimed in claim 1, wherein said recess means opens into the upper face of said housing.
Claim 10
Dependent Claim
26 words
A receiver as claimed in claim 1, wherein said modular unit is book-shaped and wherein said recess means of the housing is of substantially parallelepipedic shape.
Claim 11
Dependent Claim
24 words
A receiver as claimed in claim 1, wherein the opening of said recess means is substantially closed when said modular unit is positioned therein.
Claim 12
Dependent Claim
34 words
A receiver as claimed in claim 1, wherein said recess means is dimensioned so as to enable the modular unit, after having been positioned in the recess means, to be gripped and removed therefrom.
Claim 13
Dependent Claim
24 words
A receiver as claimed in claim 11, wherein said modular unit is provided with gripping means for facilitating its removal from said recess means.
Claim 14
Dependent Claim
40 words
A receiver as claimed in claim 12, wherein said gripping means comprises an indentation adjacent and end wall of said modular unit, said end wall substantially closing the opening of said recess means when said modular unit is positioned therein.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-12-25 | 1982-06-26 | 1982-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-25 | 1986-06-26 | 1986-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-25 | 1990-06-26 | 1990-12-26 | $7700.00 | Window Closed / Lapsed |