Did You Know...
...that a workman who left the soap mixing machine on too long was responsible for making Ivory Soap? He was so embarrassed by his mistake that he threw the mess in a stream. Imagine his dismay when the evidence of his error floated to the surface! Result: Ivory soap, the soap that floats.
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| Number | Title | Issue Date |
| 4271515 | Universal analog and digital tester Method and apparatus for comparison-type testing of electronic devices which generate analog waveform output signals. A reference unit output signal and an output signal of a unit under test are paired and selectively and synchronously compared in respons... | 06/02/1981 |
| 4255809 | Dual redundant error detection system for counters A pair of identical multiple stage digital counters receive count advance inputs designating the occurrence of the event being monitored but with the inputs displaced so the counters do not advance simultaneously. Only the upper order stages of the counte... | 03/10/1981 |
| 4241417 | Circuitry for operating read-only memories interrogated with static binary addresses within a two-channel safety switch mechanism having anti-valency signal processing In a special safety switch mechanism several processing units are arranged in pairs and form an original processing channel and a synchronously operated complementary processing channel which are operated dynamically and alternately in positive and negati... | 12/23/1980 |
| 4233682 | Fault detection and isolation system The invention provides data processing duplication and internal error checking within an integrated circuit chip at intermediate points along the logic chain. In one aspect of the invention, duplicate functional logic within the chip is utilized together ... | 11/11/1980 |
| 4181817 | High bit rate digital data signal transmission system Apparatus is disclosed for transmitting through a transmission channel a digital data stream of the type where the position of a level transition within a bit cell determines the information content of the bit cell. As the data stream is transmitted throu... | 01/01/1980 |
| 4117317 | Programmable controller with hardwired backup connecting terminals and related control system using programmable controller and hardwired backup A controller of the data processing type including a memory programmable to adapt it to a wide variety of industrial machine and process control applications includes terminals permitting a hardwired logic circuit to be connected with the controller to su... | 09/26/1978 |
| 4096396 | Chronometric system with several synchronized time-base units Three identical time-base units include respective binary counting circuits which are stepped in parallel by a series of clock pulses to generate trains of timing pulses and, after a certain number of clock cycles following resetting by a zeroizing pulse,... | 06/20/1978 |
| 4028536 | SNAIAS digital data test set The Ships Navigation Aircraft Inertial Alignment System (SNAIAS) Digital t Set checks-out the data link navigation messages between the shipboard navigation system and the aircraft inertial alignment system. The test set monitors alignment and waypoint d... | 06/07/1977 |
| 4015246 | Synchronous fault tolerant multi-processor system A bus guardian unit for a system in which processors, memories and other units are not grouped together physically but where any plurality of identical units e.g., three, can be made to operate in synchronism as though they were grouped together. Each uni... | 03/29/1977 |
| 3982111 | Memory diagnostic arrangement A diagnostic system is disclosed for detecting malfunctions in the access circuitry utilized to control the reading, writing, and refreshing of a plurality of semiconductor memory modules. More specifically, a pair of access circuits are provided for each... | 09/21/1976 |
| 3979720 | Apparatus for monitoring a redundant multi-channel analog system Apparatus for monitoring a redundant multi-channel analog system and for the forming of an undisturbed mean signal value in which all channels are connected to the inputs of a maximum value selection device and a minimum value selection device with a mean... | 09/07/1976 |
| 3944800 | Memory diagnostic arrangement A diagnostic system is disclosed for detecting malfunctions in the access circuitry utilized to control the reading, writing, and refreshing of a plurality of semiconductor memory modules. More specifically, a pair of access circuits are provided for each... | 03/16/1976 |
