Transmitter for remote control system for door locks

• US 5,252,966 A
• Filed: 09/26/1991
• Issued: 10/12/1993
• Est. Priority Date: 05/21/1987
• Status: Expired due to Term

• Current Assignee: TRW Inc. (Northrop Grumman Corporation)
• Original Assignee: TRW Inc. (Northrop Grumman Corporation)
• Inventors: Hair, Robert A., Pitera, Kenneth R., Lambropoulos, George
• Primary Examiner(s): Yusko, Donald J.
• Assistant Examiner(s): Holloway, III, Edwin C.
• Application Number:
  US07/767,034
• Time in Patent Office: 747 Days
• Field of Search: 340/825.69, 340/825.72, 340/825.31, 340/825.56, 340/825.3, 340/425.5, 340/426, 340/825.44, 455/343, 455/38.3, 307/10.2, 307/10.5, 361/172, 70/278, 70/256, 341/176
• US Class Current: 340/5.64
• CPC Class Codes: G07C 2009/00222 by more than one push button
• CPC Class Codes: G07C 2009/00793 by Hertzian waves
• CPC Class Codes: G07C 2009/00825 remotely by lines or wireless communication
• CPC Class Codes: G07C 2209/63 Comprising locating means for detecting the position of the data carrier, i.e. within the vehicle or within a certain distance from the vehicle
• CPC Class Codes: G07C 9/00182 operated with unidirectional data transmission between data carrier and locks
• CPC Class Codes: G07C 9/00817 where the code of the lock can be programmed

Abstract

A transmitter is provided for transmitting a remote binary control signal to a vehicle-mounted receiver having a stored unique security code, a security code comparator, circuitry for powering up and activating the code comparator upon receipt of a signal including an integral power up initiation code, and circuitry for outputting a vehicle function command corresponding to the function code portion of a received signal having the matching unique security code. The transmitter stores a unique security code comprising a sequence of binary bits and has a plurality of manual switches each operable to transmit an integral three-part signal comprising a sequence of binary bits including the power up initiation code, the unique security code, and a selected one of a plurality of function codes. Preferably, the power up initiation code includes at least two binary bits, the unique security code includes at least twenty-four binary bits, and the function codes each include at least three binary bits. Upon continued depression of the manual switch, the transmitter sends a second integral three-part signal containing a different function code.

Claims

1. A transmitter for transmitting a remote binary control signal to a vehicle-mounted receiver having a stored unique security code, a security code comparator for comparing the security code in a received signal with the stored unique security code, means for powering up and activating the code comparator upon receipt of a signal including an integral power up initiation code, and means for outputting a vehicle function command corresponding to the function code portion of a received signal having the matching unique security code, the transmitter comprising means for storing a unique security code comprising a sequence of binary bits, and means for transmitting an integral three-part signal comprising a sequence of binary bits including the power up initiation code, the unique security code, and a selected one of a plurality of function codes.

2. The transmitter of claim 1, including a plurality of manually-actuatable switches, each corresponding to a different function and each being operable to transmit an integral three-part binary signal including a corresponding function code, the unique security code, and the power up initiation code.

3. The transmitter of claim 2, including a power source operable by actuation of a manual switch to transmit only a single integral three-part binary signal.

4. The transmitter of claim 1, including a manually-actuatable switch, and a power source operable by actuation of the manual switch to transmit a single integral three-part signal containing a first function code and, upon continued depression, to send a second integral three-part signal containing a different function code.

5. The transmitter of claim 1, wherein the power up initiation code includes at least two binary bits, the unique security code includes at least twenty-four binary bits, and the function codes each include at least three binary bits.