Henry C Sibley, Age 751182 Mountain Laurel Dr, Columbus, NC 28722

4234870, Nov 18, 1980

Jan 11, 1979

6/002765

Henry C. Sibley - Adams Basin NY

General Signal Corporation - Rochester NY

G08G 2500
G06F 1130
H04L 114

340348

A code generator including a programmed microprocessor for transmitting a selected fixed frequenccy signal through optical isolators to tuned vital relay drivers. Feedback information from these drivers monitors their operation and checks operation of output circuitry. External time delays are provided to check program delays within the system and to ensure against the generation of erroneous codes due to cyclical resetting of the system. A rate selector is provided to permit selection of particular output code rates and is cycle checked continuously to ensure that the system is always certain of the selected code. Unique programming functions are also provided for self checking and for checking the operation of the microprocessor against the operation of external components to provide total system integrity and total system reliability. Diversity and cycle checking are used throughout the system to provide vital qualities. The system has no failure bias and is entirely self checking.

4181849, Jan 1, 1980

Jan 30, 1978

5/873574

Henry C. Sibley - Adams Basin NY

General Signal Corporation - Stamford CT

G07C 1100

235 92T

A vital relay driver whose response time can be readily controlled such that the release time of the relay may be varied, yet may be held to very close tolerances. The vital relay driver is controlled by a microprocessor dedicated to this function, such processor generating a dynamic signal of fixed frequency in dependence on a cycle number which is continually replenished; otherwise the microprocessor stops producing the dynamic signal and the relay is released in a closely known time.

4563762, Jan 7, 1986

Apr 23, 1984

6/581745

Henry C. Sibley - Adams Basin NY

General Signal Corp. - Stamford CT

G06F 1100

371 16

A vital communication system includes a conventional, that is non-vital, communication link, a transmitter and a receiver. The transmitter is responsive to input data, and provides for encoding and transmission as well as checking of its own input arrangement. The encoding and transmission is effected by a program driven device, but as loaded the program is incomplete. The checking produces certain check words which are used to complete the program so that only in those instances in which the checks are passed, will an appropriate message be transmitted. The receiver includes a decoder logic as well as a decoder check logic. The messages are decoded and applied to an output device. The decoder check logic checks that the information supplied to the output device corresponds to the decoded information, and if the check is passed, the output device is enabled to output the information to the outside world.

4097764, Jun 27, 1978

Mar 18, 1977

5/779192

Henry C. Sibley - Adams Basin NY

General Signal Corporation - Rochester NY

H02H 720

307200A

A fail-safe solid state logic system based on the use of an AC input signal of one type, and a DC input which causes a logical gate to convert the AC input signal to a totally different AC output signal; that is, to one adapted to be received by a vital driver or the like, which is tuned to accept only that different AC output signal and no other. Accordingly, the failures which are most likely to occur, namely, shorts from input to output or failure to toggle, result in the AC signal frequency not being changed and as a consequence, the system fails safe.

4307463, Dec 22, 1981

Feb 8, 1980

6/119655

Henry C. Sibley - Adams Basin NY

General Signal Corporation - Rochester NY

G06F 1100
B61L 2700

371 14

A vital rate decoder for actuating one of a plurality of output relays in correspondence with the frequency of an input signal applied thereto, comprising a main rate decoding processor for evaluating the frequency and duty cycle of the input signal by establishing permissible rate windows defined by predetermined tolerances such that the output device corresponding to a frequency can be actuated only when the input signal has a rate code falling in a respective rate window with a predetermined duty cycle tolerance. The rate decoding processor produces plural checkwords having predetermined values based on failure-free rate decoding of the input signal. The checkwords are processed by a checking processor which produces a relay actuating signal only if valid checkwords are produced. The checking processor uses the checkwords to select and load predetermined bytes into a pair of vital counting registers which are then successively decremented. The checking processor then compares the decremented counter register contents at each step to verify that the contents thereof bear a predetermined relationship such that the output device corresponding to the rate code of the input signal is actuated only until the counting registers reach a predetermined count and only so long as the comparison of the contents of the pair of counting registers bear the predetermined relationship.

4090173, May 16, 1978

Dec 17, 1976

5/751505

Henry C. Sibley - Adams Basin NY

General Signal Corporation - Rochester NY

G06F 1108

3401461BA

An all-digital communication system is arranged to exhibit fail-safe qualities. Each message includes a pair of words, each word separated from every other word by framing information in the form of two bits, either 1/0 or 0/1. Each word in the message is arranged to exhibit a constant ratio of 1's to 0's, so that more than a single change in any bit location is needed to change from one valid message word to another. The second word in each message is the complement of the first. Two decoders are disclosed, a hard-wired embodiment and an embodiment employing a microprocessor. In the hard-wired embodiment, straightforward decoding is employed to determine the apparent message, and the apparent message is encoded to generate a locally generated message which is then compared, bit by bit, with the received message employing vital logic techniques. Assuming each of the received and locally generated bits compare, the message is validated. In the microprocessor embodiment, decoding of each word is accomplished by a table.

4471486, Sep 11, 1984

Jun 15, 1981

6/273299

Henry C. Sibley - Adams Basin NY

General Signal Corporation - Stamford CT

G06F 1100

371 53

A vital communication system includes a conventional, that is non-vital, communication link, a transmitter and a receiver. The transmitter is responsive to input data, and provides for encoding and transmission as well as checking of its own input arrangement. The encoding and transmission is effected by a program driven device, but as loaded the program is incomplete. The checking produces certain check words which are used to complete the program so that only in those instances in which the checks are passed, will an appropriate message be transmitted. The receiver includes a decoder logic as well as a decoder check logic. The messages are decoded and applied to an output device. The decoder check logic checks that the information supplied to the output device corresponds to the decoded information, and if the check is passed, the output device is enabled to output the information to the outside world.

4365164, Dec 21, 1982

Jan 16, 1981

6/225813

Henry C. Sibley - Adams Basin NY

General Signal Corporation - Stamford CT

G02B 2700

250551

A contact monitoring circuit for producing a dynamic signal representative of the state of a contact. The circuit includes a control signal generator for generating a pair of optical pulse streams comprised of alternate and sequential optical pulses. A pair of gating means, each responsive to one of the pair of pulse streams, connects each of two conductors to one of a positive and negative source of potential in time coincidence with the associated pulse stream. A circuit means, including an optical coupler, the contact being monitored and a fixed potential, has a complete supply circuit during times coincident with only one of the pulse streams, the condition of the contact determines which of the pulse streams will complete the supply circuit. Therefore, the optical coupler produces a dynamic signal representative of the contact state.