Patent US2496560A successfully refreshed from Google Patents.
EP0107286A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Method of and apparatus for special program decoding of scrambled subscription television transmission and the like
Assignee: Blonder-Tongue Laboratories Inc
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Filing: 1983-08-19
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Granted: —
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Expires: 2003-08-19
Abstract
Abstract This disclosure is concerned with a limited time operative decoder for special scrambled television program transmissions involving a voltage source for energizing the decoder of limited time effectiveness adapted to energize the decoder only during the limited time of the special scrambled television program.
Inventors
- 👤 George Scherer
- 👤 Walter Joswick
- 👤 Isaac S. Blonder
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 09:36
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/16
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
173 words
Decoding apparatus for subscription scrambled television program of specialized nature and limited period of time reception, having, in combination, a base unit comprising passive electronic circuit means adapted, when energized, to decode the scrambling on a received tele- vision program transmission; a disposable energizing unit comprising a limited life voltage source connected in circuit with normally open switching means and dissipation means for bleeding the voltage of the voltage source when the switching means is closed; means for plugging the energizing unit into the base unit comprising means operable upon such plug-in for closing the switching means and connecting the voltage source to the base unit electronic circuit to energize the same and permit the decoding of the scrambled television program for the duration of the life of the voltage source; the dissipation means being adjusted so that upon the plug-in of the energizing unit, the voltage source is sufficiently dissipated to insure insufficient life to energize the base unit electronic circuit after the limited period of time of the specialized television program.
Claim 2
Dependent Claim
173 words
Decoding apparatus for subscription scrambled television program of specialized nature and limited period of time reception, having, in combination, a base unit comprising passive electronic circuit means adapted, when energized, to decode the scrambling on a received tele- vision program transmission; a disposable energizing unit comprising a limited life voltage source connected in circuit with normally open switching means and dissipation means for bleeding the voltage of the voltage source when the switching means is closed; means for plugging the energizing unit into the base unit comprising means operable upon such plug-in for closing the switching means and connecting the voltage source to the base unit electronic circuit to energize the same and permit the decoding of the scrambled television program for the duration of the life of the voltage source; the dissipation means being adjusted so that upon the plug-in of the energizing unit, the voltage source is sufficiently dissipated to insure insufficient life to energize the base unit electronic circuit after the limited period of time of the specialized television program.
Claim 3
Dependent Claim
39 words
Decoding apparatus as claimed in claim 1 and in which the said energizing unit is provided with means for continuing the dissipation of the voltage source after plug-in, even if the energizing unit is removed from the base unit.
Claim 4
Dependent Claim
47 words
Decoding apparatus as claimed in claim 1 and in which the said electronic circuit is provided with voltage or current-sensitive means protected by the energizing unit circuit but inoperable to enable operation of the electronic circuit if voltage from another source is applied to the base unit.
Claim 5
Dependent Claim
30 words
Decoding apparatus as claimed in claim 1 and in which the said switching means is a mechanically operable latching switch and the plugging means includes means for closing said switch.
Claim 6
Dependent Claim
28 words
Decoding apparatus as claim 4 and in which the said switching means following plug-in is maintained closed within the energizing unit with means for preventing physical access thereto.
Claim 7
Dependent Claim
43 words
Decoding apparatus as claimed in claim 1 and in which said switching means comprises electronic switch means operable to an effective closed circuit position upon the flow of current from the voltage source upon plug-in of the energizing unit into the base unit.
Claim 8
Dependent Claim
32 words
Decoding apparatus as claimed in claim 1 and in which said base unit electronic circuit comprises a trap tunable when effective to eliminate a scrambling carrier frequency in the television program transmission.
Claim 9
Dependent Claim
150 words
Decoding apparatus for the reception of subscription scrambled television programs of specialized nature and limited period of time, having, in combination, passive electronic circuit means adapted, when energized, to decode the scrambling of a received television program transmission; an energizing circuit comprising a limited-life voltage source connected in circuit with normally open switching means and dissipation means for bleeding the voltage of the voltage source when the switching means is closed; means for connecting the energizing circuit to the passive circuit to energize the same upon closing of the switching means to permit the decoding of the scrambled television program for the duration of the life of the voltage source; the dissipation means being adjusted so that after the closing of the switching means, the voltage source becomes sufficiently dissipated to insure insufficient life to energize the electronic circuit after the limited period of time of the specialized television program.
Claim 10
Dependent Claim
150 words
Decoding apparatus for the reception of subscription scrambled television programs of specialized nature and limited period of time, having, in combination, passive electronic circuit means adapted, when energized, to decode the scrambling of a received television program transmission; an energizing circuit comprising a limited-life voltage source connected in circuit with normally open switching means and dissipation means for bleeding the voltage of the voltage source when the switching means is closed; means for connecting the energizing circuit to the passive circuit to energize the same upon closing of the switching means to permit the decoding of the scrambled television program for the duration of the life of the voltage source; the dissipation means being adjusted so that after the closing of the switching means, the voltage source becomes sufficiently dissipated to insure insufficient life to energize the electronic circuit after the limited period of time of the specialized television program.
Claim 11
Dependent Claim
16 words
Decoding apparatus as claimed in claim 8 and in which said switching means is manually actuated.
Claim 12
Dependent Claim
22 words
Decoding apparatus as claimed in claim 8 and in which means is provided for preventing access to said circuit and energizer unit.
Claim 13
Independent Claim
71 words
A method of securely decoding subscription scrambled television programs of specialized nature and limited period of time at a decoder, that comprises, receiving the scrambled program transmission; energizing the decoding of the scrambling, during such receiving, from a voltage source actuable by the subscriber; and dissipating the voltage source during such energizing to insure insufficient life thereof to continue the energizing aftcr the limited period of time of the specialized program.
Claim 14
Independent Claim
71 words
A method of securely decoding subscription scrambled television programs of specialized nature and limited period of time at a decoder, that comprises, receiving the scrambled program transmission; energizing the decoding of the scrambling, during such receiving, from a voltage source actuable by the subscriber; and dissipating the voltage source during such energizing to insure insufficient life thereof to continue the energizing aftcr the limited period of time of the specialized program.
Claim 15
Dependent Claim
23 words
A method as claimed in claim 11 and in which said decoding comprises trapping out a scrambling carrier frequency in the program transmission.
Claim 16
Dependent Claim
22 words
A method as claimed in claim 12 and in which access by the subscriber to said energizing and dissipating operations is prevented.
Claim 17
Dependent Claim
35 words
A method as claimed in claim 11 and in which said energizing and dissipating steps are effected in a disposable unit, adapted to be plugged into the decoder by the subscriber to initiate said energizing.
Claim 18
Dependent Claim
27 words
A method as claimed in claim 14 and in which, once the energizing is initiated, the dissipating continues irrespective of removal of said unit from the decoder.
Claim 19
Dependent Claim
23 words
A method as claimed in claim 14 and in which said decoding is maintained unenergized by attempted application of a different voltage source.
References Cited (Backward Citations)
No citation records indexed.
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