US4912463A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Remote control apparatus
Assignee: Princeton Technology Corp
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Filing: 1988-08-09
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Granted: 1990-03-27
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Expires: 2008-08-09
Abstract
Abstract A remote control apparatus has a transmitter which is capable of being switched between a normal position and a changing position, and a receiver which is capable of being switched between a normal mode and a changing mode. The remote control apparatus utilizes a first memory device in the transmitter to store an address code; an address code generator in the transmitter to generate a new address code and to store it in the first memory device when the transmitter is switched to the changing position; and a transmitting device in the transmitter to transmit the address code stored in the first memory device. The remote control apparatus also utilizes a receiving device in the receiver to receive the transmitted address code; a second memory device in the receiver to store the received address code therein when the receiver is switched to the changing mode; a comparator in the receiver to compare the received address code with the address code stored in the second memory device when the receiver is switched to the normal mode; and an output gate in the receiver to be activated by the comparator to output an operating signal when the address codes are the same.
Inventors
- 👤 Marshall Li
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:48
CPC Classifications
G; G08; G08C; G08C19/00; G08C19/16; G08C19/28; G08C2201/00; G08C2201/20
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
327 words
A remote control apparatus including a transmitter which is capable of being switched between a normal position and a changing position, and a receiver which is capable of being switched between a normal mode and a changing mode, said remote control apparatus comprising: a first memory means in said transmitter for storing a digital address code having a plurality of bits; generating means in said transmitter for generating a new address code and for storing the new address code in said first memory means when said transmitter is switched to the changing position, said generating means including a manual code generator for being manually controlled to generate the new address code; transmitting means in said transmitter for transmitting the address code stored in said first memory means; receiving means in said receiver for receiving the transmitted address code; a second memory means in said receiver for storing the received address code therein when said receiver is switched to the changing mode; comparing means in said receiver for comparing the received address code with the address code stored in said second memory means when said receiver is switched to the normal mode; means in said receiver for being activated by said comparing means to output an operating signal when the received address code and the address code stored in said second memory means are the same; and a third switch means in said transmitter for being manually switched between on and off positions, said manual code generator being coupled to and controlled by said third switch means to generate a logical high bit signal when said third switch means is switched to the on position for greater than a predetermined length of time, and to generate a logical low bit signal when said third switch means is switched to the on position for not greater than the predetermined length of time, said first memory means comprising means for storing the logical high and low bit signals in series.
Claim 2
Dependent Claim
327 words
A remote control apparatus including a transmitter which is capable of being switched between a normal position and a changing position, and a receiver which is capable of being switched between a normal mode and a changing mode, said remote control apparatus comprising: a first memory means in said transmitter for storing a digital address code having a plurality of bits; generating means in said transmitter for generating a new address code and for storing the new address code in said first memory means when said transmitter is switched to the changing position, said generating means including a manual code generator for being manually controlled to generate the new address code; transmitting means in said transmitter for transmitting the address code stored in said first memory means; receiving means in said receiver for receiving the transmitted address code; a second memory means in said receiver for storing the received address code therein when said receiver is switched to the changing mode; comparing means in said receiver for comparing the received address code with the address code stored in said second memory means when said receiver is switched to the normal mode; means in said receiver for being activated by said comparing means to output an operating signal when the received address code and the address code stored in said second memory means are the same; and a third switch means in said transmitter for being manually switched between on and off positions, said manual code generator being coupled to and controlled by said third switch means to generate a logical high bit signal when said third switch means is switched to the on position for greater than a predetermined length of time, and to generate a logical low bit signal when said third switch means is switched to the on position for not greater than the predetermined length of time, said first memory means comprising means for storing the logical high and low bit signals in series.
Claim 3
Dependent Claim
74 words
A remote control apparatus as claimed in claim 1, wherein said generating means further includes a timing gate coupled to said third switch means for calculating a time period during which said third switch is switched to the on position, and an indicating means coupled to said timing gate for being activated to indicate that said third switch means has been switched to the on position for greater than the predetermined length of time.
Claim 4
Dependent Claim
16 words
A remote control apparatus as claimed in claim 2, wherein said indicating means is a buzzer.
Claim 5
Dependent Claim
18 words
A remote control apparatus as claimed in claim 2, wherein said indicating means is a light emitting diode.
Claim 6
Dependent Claim
46 words
A remote control apparatus as claimed in claim 2, further comprising a first switch means in said transmitter for switching said transmitter between the normal and changing positions, and a second switch means in said receiver for switching said receiver between the normal and changing modes.
Claim 7
Dependent Claim
103 words
A remote control apparatus as claimed in claim 5, wherein said first switch means can also be switched to a random code generating position, and wherein said generating means further includes a random code generator for being activated to initiate a random address code generating process when said first switch means is switched to the random code generating position and when said third switch means is switched to the on position, said random code generator generates a random address code and stores the random address code in said first memory means when said third switch means is then released to the off position.
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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) | 1993-03-26 | 1993-09-25 | 1994-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-26 | 1997-09-25 | 1998-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-26 | 2001-09-25 | 2002-03-27 | $7700.00 | Window Closed / Lapsed |