Abstract: A timing device utilized for determining overall response of a vehicle to initial starting activities. The vehicle is comprised of an engine, a transbrake, a transbrake button and delay box for engaging and disengaging the transbrake, a drive shaft, a throttle stop mechanism, and an acceleration pedal. The timing device is in an operative relationship with the vehicle and produces electrical signals in response to various events that occur prior to and during a drag race. The timing device calculates an elapsed time between various pairs of the electrical signals produced. The device displays the elapsed times to the driver or user in an alphanumeric format.

Abstract: A monitoring apparatus for use with an electrical appliance to record and display the electrical appliance's actual accumulated operating time and record and display the number of times the electrical appliance has been energized since the time the monitoring apparatus was installed or last reset. The monitoring apparatus may include a current detector, a time recorder, and a counter for detecting and recording operation time and number of start-ups.

Abstract: A curfew timer apparatus for selectively disconnecting a signal line from an appliance. The apparatus includes a base and a timer coupled to the base. The timer is preferably a seven day timer configured to disconnect the signal line from the appliance during said preselected time periods and prevent usage of the appliance. The apparatus also lockable cover coupled to the base to protect and reduce the likelihood of tampering with the switch, the timer, the coupling means, and the connecting means. The base includes a flange surrounding an outer periphery of the base. The flange is configured to extend below a bottom surface of the base to abut a wall surrounding the wall outlet to reduce further the tampering risk. The apparatus further includes a three way switch for selectively continuously disconnecting the signal line from the appliance, continuously connecting the signal line to the appliance, or connecting the signal line to the appliance through the timer.

Abstract: A run time recorder device (1,10) monitors the operating time of an electrical appliance driven by AC. The device is coupled to the supply voltage and monitors the supply by determining the operating time of the appliance from the number of repetitions of the periodic wave form of the supply voltage. A reading device for use with the recorder device may be coupled to the recorder device either by the supply leads or via a contactless coupling for the transmission and reception of signals to and from the recorder device. A regulating device (200) for regulating a load apparatus (144) comprises a controller (110), a memory (116) for storing an instruction data set means (118) for monitoring a condition such as temperature which is used by the controller to determine when to change the operating state and an interface (120) for communicating with the load apparatus.

Abstract: A new and improved low power GPS signal receiver system includes a GPS signal receiver device and control processor for powering up the signal receiver device for a first sufficient period of time to locate and acquire a time signal from a single GPS satellite and then powering down the GPS signal receiver device after establishing a local time and for waiting another sufficient period of time after receiving a user request to update time before powering up the signal receiver device to facilitate about an immediate sync on another GPS navigation message subframe indicative of the time maintained by said single GPS satellite vehicle. Once the second sufficient period of time has elapsed, the control processor powers up the GPS signal receiver device for a third sufficient period of time to acquire and process 29 bits of subframe message information indicative of time maintained by the GPS satellite vehicle.

Abstract: A device for the determination of the elapsed time since the initial activation of a unit of equipment. The device consists of a first and second circuit and a switch-on element. The first circuit establishes a connection between the item of equipment and the switch-on element. The second circuit consists of at least a time-counter and a source of energy to power the time-counter. Both circuits can be activated simultaneously by the switch-on element. The first circuit can be used both as the current flow for the item of equipment and also for detecting voltage or physical energy in a component of an item of equipment. The switch-on element can be activated both mechanically and electronically. The counter-information can be presented in a display unit in both a deletable or non-deletable manner. The time-counter and the display unit are powered by their own energy source.

Abstract: Electrical apparatus such as a timer for use in a water filter is formed integrally with a sealed housing. The housing has a resilient, depressible surface from which a projection extends. At least an end surface of the projection is electrically conductive. A pair of spaced-apart electrical contacts are located close to the end surface of the projection. Resilient deflection of the depressible surface causes the projection to come into contact with the electrical contacts, thereby making an electrical connection between them.

Abstract: A timer controls equipment with electrical drivers, in which timer is combined an electromechanical device and an electronic circuit. The timer includes an electromechanical device (1) in conjunction with an electronic circuit (2). The electromechanical device (1) includes a surface (9) on which is printed, in encoded form, the states in which the equipment may be and a sensor (8), or a set of sensors (8), which move in relation to the printed surface (9) by means of an electromechanical transducer (3), detecting the printed codes. The electronic circuit (2) receives signals from reading sensors (8) of the state codes, and transducer signals (3), which exist in the equipment, and command the electrical drivers (4), as well as the movement of the reading sensors (8) of the electromechanical device (1).

Abstract: A solo electronic starter and timer system for runners that includes a starter position unit, a finish position unit, and an athlete body unit; the body unit radio transmitter circuit transmitting a stop pulse to the finish position unit in response to the triggering of the body unit radio transmitter control circuit triggered by an optical body unit photo detector circuit; the finish position unit having a micro-controller programmed to time and display the elapsed time between receipt of start pulse by a radio receiver circuit of the finish position unit and receipt of the stop pulse that is generated by the body unit radio transmitter circuit of the athlete body unit.

Abstract: An arrival order judgment device is easy in operation to judge the arrival order for positively recording slit images before and after the finish line for the arrival order judgment only in a necessary minimum range. Slit signals picked up by a line image sensor camera are inputted into a video signal delay circuit. The video signal delay circuit outputs the slit video signals at a predetermined delay time period A. When competitors approaches the finish line and the moment the competitors interrupt a photoelectric device, ON signals are inputted into a memory device to start the record of the images delayed for a predetermined time period. When the competitors are not on the finish line, the photoelectric device outputs OFF signals to a record instruction delay circuit. The record on the memory device is interrupted after the delay period set at the record instruction delay circuit has lapsed. Thus, it is possible to record the images after the competitors have passed through the finish line.

Abstract: A system for accurately measuring and displaying the elapsed time from the instant a vehicle driver mechanically or electronically acts on a vehicle to start forward motion of the vehicle until the time actual vehicle movement begins. The system includes a timer, a start timer switch for activating the timer when the vehicle is instructed by the driver to begin forward motion and a stop timer switch which stops the timer when the vehicle attains a predetermined forward acceleration.

Abstract: Apparatus for judging the order of arrival of racers at a goal in a race and the time taken for the race, capable of storing, in a memory unit, video signals of a plurality of line sensor cameras disposed so as to be able to pick up images of moving objects from both directions with a judging criterion line between or from such angles that moving objects do not overlap, effecting scan conversion on the stored video signals of the plurality of line sensor cameras, reading resultant video signals, and displaying video signals thus read out respectively singly or simultaneously plurally on a single video monitor.

Abstract: A system for recording and displaying a time-sequential scene on a computer comprising a digital camera, an image timer, and a main control computer. The digital camera transmits a sequence of digital image frames to the timer representative of the image of a body passing a plane in space. Each frame represents a line of the body, thus forming a fractional part of the scene. Once the frame reaches the image timer, it is digitally marked with a time reference and buffered into a block of information. The main control computer stores blocks of information from the image timer for a variety of processing and features available to the user. A compression system compresses a sequence of digital image frames for storage into a selected memory, preferably a virtual memory subsystem, or hard-disc drive.

Abstract: A time totaling meter and an unit thereof for internal combustion engines comprising a part of an ignition device to lead ignition pulses toward outside of the ignition device, pulse induction means to electromagnetically induce said ignition pulses, waveform shaping means to shape this electro-magnetically induced pulses, and judging means to determine whether this waveform shaped output pulses are derived from operation of the internal combustion engine or not, and capable of counting and storing total operation time of the internal combustion engine from initial operation thereof to said count memory means based on said output pulses selected by said judging means and displaying this counted operation time on display means.

Abstract: An elapsed time hour meter for measuring and indicating an amount of elapsed time used in many types of applications. The elapsed time hour meter has a cylindrical rotating counter indicator that indicates the amount of elapsed time, and it is driven by an electrically powered watch movement. The gear work of the elapsed time hour meter couples the watch movement to the rotating counter whereby the watch movement drives the counter indicator to measure and indicate the actual amount of elapsed time. The watch movement is a reliable production wrist watch without battery, face and hands and to the minute stem of which is affixed a minute gear coupled to an intermediate gear supported on a lower housing half which couples to the counter indicator. The power supply elements and external terminals are supported in the upper housing half. The elapsed time hour meter is versatile and reliable and has the advantages of being small in size, low in cost, and low in power consumption.

Abstract: A system for recording and displaying a time-sequential scene on a computer comprising a digital camera, an image timer, and a main control computer. The digital camera transmits a sequence of digital image frames to the timer representative of the image of a body passing a plane in space. Each frame represents a line object of the body, thus forming a fractional part of the scene. Once the frame reaches the image timer, it is digitally marked with a time reference and buffered into a block of information. The main control computer stores blocks of information from the image timer for a variety of processing and features available to the user. The invention also provides a compression system for compressing a sequence of digital image frames for storage into a selected memory, preferably a virtual memory subsystem, or hard-disc drive.

Abstract: While the electric power source is turned on, capacitor 1 is charged to a voltage EO by a direct current constant voltage supplier through transistor 4. When the electric power is disconnected, transistor 4 is switched off to discharge capacitor 1 through resistor R1. When the power source is turned on, the voltage of capacitor 1 is read by A/D converter to be produced and stored in CPU 12 memory. Then transistor 4 is switched on to charge capacitor 1 to the voltage EO. Then transistor 4 is switched off and transistor 5 is switched on to discharge capacitor 1 through resistor R2 and a counter stars. When the voltage of capacitor 1 reduces to the same voltage stored in the memory, transistor 5 is switched off to stop the counter and to obtain the counted value t2. Then transistor 4 is switched on to prepare for the next operation. The time lapse t1 after the power source being turned off is obtained by a formula (R1/R2).times.t2.

Abstract: An elapsed time recording device includes a counter (130) for incrementally advancing a count value from an initial value towards and beyond a threshold in response to successive clock pulses of a clock signal. Control logic (140) enables the counter (130) to incrementally advance the count value in response to a first input (pin 3) and a second input (pin 1) being at or near a first voltage level, and holds the count value in response to the first input (pin 3) being at or near a second voltage level and the second input (pin 1) being at or near the first voltage level. Setting logic (210) sets the count value to a value beyond the threshold in response to the first input (pin 3) and the second input (pin 1) being at or near the second voltage level when the count value is between the initial value and the threshold.

Abstract: A Method and apparatus for identifying events for making changes to a meter register configuration. In the one embodiment, the method comprises the steps of storing event data, including event dates, in a meter register memory, the event data being stored in a floating date format or in a fixed date format, and processing the event data to determine whether a current date corresponds to an event date.

Abstract: A method and apparatus for estimating the expired portion of the expected total service life of a mercury vapor lamp based upon the time that the lamp is electrically energized. The length of time that the lamp is energized is measured for each time period that the lamp is energized throughout the life of the lamp. A lamp usage value is determined for each time period that the lamp is energized. The lamp usage value for each time period is determined by assigning a first time dependent value for each time unit of a first predetermined time segment of the time period that the lamp is energized. A second time dependent value is assigned for each time unit of a second predetermined time segment of the time period commencing after the expiration of the first time segment that the lamp is energized. A third time dependent value is assigned for each time unit of the time period that the lamp is energized beyond the expiration of the second time segment.

Abstract: A timer for measuring time spent productively in an activity, with a minimum of interference with the activity, which includes a sensor and a delay circuit. The delay circuit compensates for productive time spent in an intermittent activity which may not result in the production of energy to which the sensor is responsive, as often occurs, for instance, during the practice of performing arts. Sensors preferably are responsive to energy which can be conducted through the atmosphere, such as sound and visible light. The timer may be fabricated as a free-standing unit, included within an electronic metronome or functionally combined with a variety of equipment.

Abstract: An engine operating time measuring apparatus is provided for use with an engine having an internal magneto-type electrical generator providing an ignition voltage. The engine operating time measuring apparatus includes a housing and a pair of terminals extending outside the housing for connection with the monitored engine and extending inside the housing for connection with the time measuring apparatus. A subassembly including power supply circuitry, a clock movement drive assembly, gear train and mechanical counter for displaying the engine operating time is accurately positioned and retained in the housing cooperatively provided by a counter frame and a plurality of keying and positioning rails formed within the housing. A low torque clock movement for driving the mechanical counter is generated by a crystal-based clock motor movement assembly.

Abstract: The times which elapse while the participants in a race or another contest cover the distance between a starting line and a finish line are ascertained, at an accuracy of one hundredth of a second, with a camera which takes pictures of the finish line at a first frequency and transmits picture signals to a pulse amplifier as well as to a mixing stage which latter transmits picture signals to a video recorder. A timing pulse generator transmits signals at a frequency of one thousandth of a second; such signals are processed in a second generator which transmits processed signals to a pulse separator connected with the output of the amplifier of picture signals. This ensures that each picture receives and exhibits information denoting the exact instant of taking the respective picture irrespective of the frequency of picture taking.

Abstract: The times of participants in automobile, foot, dog, bicycle or other races are ascertained by employing a video camera which takes pictures of the finish line and its surroundings at intervals of 1/25 second and by employing at least one photoelectronic detector which generates a signal when the winner or any other participant crosses the finish line and interrupts the beam of radiation between the radiation source and the transducer of the detector. Information denoting the times of taking the pictures and the times of those participants who or which have interrupted the beam of radiation is recorded on the pictures. The times of other participants who or which do not individually interrupt the beam of radiation are calculated on the basis of the recorded information and, if necessary, with assistance from a calculator which applies to the pictures a scale with lines spaced apart from each other by distances corresponding to those covered by a participant within 1/100 second.

Abstract: An electronic timing apparatus for determining precisely when vehicles pass over a particular line on a road, particularly a race track (20), has a series of separate loop antennas (26), arranged in closely adjacent relationship one to another across the width of the track. Each vehicle (81,82) is fitted with a transmitter (28) for transmitting a unique identifying signal which is received by a loop antenna as the vehicle passes over the line. The width (x) of the antenna loops relative to the width of the vehicles is such that only one transmitter (28) can pass over a particular loop at the one time whereby when two or more vehicles cross the line simultaneously, signals from the respective transmitters are received in different antennas. A respective receiver module (27) is connected to each antenna loop and processes the identifying signal which is then fed to a micro-controlled (43) which calculates the time at which the particular vehicle crossed the line.

Abstract: An hour meter is activated by the stray magnetic flux leaking from a piece of equipment to be monitored or surrounding a conductor supplying current to operate that equipment. A tie down rod extends from the housing of the hour meter, and serves the dual function of providing a means to strap the hour meter onto the housing of the equipment and as an antenna to conduct alternating magnetic flux to a coil within the hour meter. There an alternating voltage is induced in the coil, which is rectified by a doubler circuit and applied to a switching transistor, which in turn allows a timer to run from a battery contained within the hour meter. The battery only supplies power to run the timer; the sensing circuit itself is self-powered by the energy induced by inductive coupling to the coil.

Abstract: A microwave oven with a timer device driven by a ripple voltage related to the mains frequency. The ripple voltage appears at a circuit point in the microwave oven power supply only during the time when microwave energy is being fed into the oven cavity.

Abstract: A usage monitor is provided for electrical appliances, primarily for televisions, which keeps track of appliance usage during a moving time interval, such as the week immediately prior to the instant moment, and provides a readout of a number of hours per unit time that the device has been on. In the television implementation illustrated and claimed, a power interfacing box is used into which the television plug is inserted, and the box has a key-operated switch which enables the time monitoring to be temporarily deactivated in the event the parents wish to watch some television.

Abstract: A directional starting spring which ensures that an AC synchronous motor is rotating in the proper direction is disclosed. The AC synchronous motor includes a circular magnet rotating in "synch" with the frequency of the alternating current. The magnet rotates a worm gear attached to the center on its axial face. This worm gear drives a second worm gear positioned perpendicular to the first worm gear. The second worm gear drives a series of gears which display the elapsed time. Attached to this second worm gear is the directional starting spring. If the motor is rotating in the proper direction the spring contacts the housing of the meter and slides on the second worm gear. If the motor is rotating in the wrong direction the spring contacts the axial face of the magnet stopping the rotating magnet and pushing it in the proper direction.

Abstract: A voltage measurement circuit is provided which can be used in a single supply situation, which has a measurement range from rail to rail and which uses a reference voltage which can lie anywhere between the rails but not at the rail to which measurements are to be referenced. The unknown voltage is sampled to a first plate of a capacitor. The second plate of the capacitor is connected to ground. The first plate of the capacitor is then connected to the first input of a comparator, the second input being connected to receive the reference voltage. If the unknown voltage is less than the reference voltage, the second plate of the capacitor is disconnected from ground and then connected to receive the reference voltage. Otherwise it remains connected to ground. The first plate of the capacitor is then connected to a constant current source, causing the voltage at the first comparator input to decrease linearly with time.

Abstract: A timing control device for a driving mechanism including a clutch or a solenoid has a sensor which operates a fixed time interval after the mechanism is driven in response to a drive signal and a timer which measures the time interval between when this drive signal is given and when the sensor operates. This measured time interval is compared with a reference value and the timing of providing the drive signal is adjusted according to the result of this comparison.

Abstract: A housing of a cooking apparatus has a heating chamber and an operation section. Cooking operation keys are arranged to allow a user to perform cooking operations in the operation section. A display is arranged in the operation section for displaying at least numerical information. A cooking time-setter is arranged to set a required cooking time in the operation section, upon rotation of the setter. An encoder is coupled to the cooking time-setter, and it generates pulse signals, the number of pulses corresponding to the angular position of the cooking time-setter. A controller is connected to the heating chamber, the cooking operation keys, the display, and the encoder. The controller executes an interruption procedure in response to the pulse signals from the encoder, counts the pulses of the pulse signals, fetches the count values as the cooking time-setting information of the cooking time-setter, and supplies the cooking time-setting information to the display.

Abstract: The circuit comprises an elapsed time indicating meter and a silicon-controlled rectifier, used to supply power to the meter, connected in series across the circuit's first and third terminals. Additionally, the circuit includes a small resistor connected between the second and third input terminals, that is, connected in series with the a.c. device. This small resistor receives the current through the a.c. device and the voltage across the small resistor is indicative of the operational state of the a.c. device. A variable potentiometer is connected full scale across the small resistor and the variable voltage is amplified by a common-base transistor. This amplified voltage is both rectified and filtered, serving as the SCR's gate terminal input for triggering the SCR.The potentiometer is adjustable to allow the SCR to trigger in either one of two conditions.

Abstract: A timer for an electric rice cooker includes a switch for setting the current time and a switch for setting the cooking completion time. When the operation of the current time set switch precedes that of the cooking completion time set switch, the cooking operation is started after lapse of a predetermined time period in accordance with the difference time period between the current time set and the cooking completion time set. The cooking operation is completed at the cooking completion time set. When the cooking completion time set switch is operated without preceding operation of the current time set switch so that a cooking completion standby period of time is set, the cooking operation is started after lapse of a leftover period of time, the value of which is obtained by subtracting a cooking period of time from the cooking completion standby period of time set. The cooking operation is completed after lapse of the cooking completion standby time period.

Abstract: A timer device, which has at least a load control function, includes a counter, circuitry for setting the counter, a display and a controller. Generally, the display displays a value of the counter. The controller causes the display to flash while the load is being operated, but keeps the display continuous when the setting circuitry is operated even if the load is being operated. This aids in the setting process.

Abstract: An electronic non-volatile elapsed time meter useful for generating elapsed time information when connected in parallel with an input supply voltage supplying power to a power driven device. Visual readouts are continuously generated during time of use of the input supply voltage and accumulated intervals of time of use are stored in a non-volatile memory when power is removed from the device. Upon a later resumption of power usage, the stored non-volatile data is retrieved, displayed and summed with the new generated elapsed time information. This meter is applicable to both AC and DC operations.

Abstract: A light-flash starting accessory for the electronic clock of a photofinish and elapsed time recorder located at the finish line for timing a race for record establishing purposes comprising a starting gun, means for generating a light-flash simultaneously with the firing of said starting gun and located in relative close proximity to the starting line of said race, a flash finder located in the vicinity of said photofinish recorder and connected thereto by electronic cable, said flash finder being adapted for aiming at and sighting a designated mark for identifying the location of the source of said light-flash when emitted, said flash finder having means detecting said flash and generating an electronic pulse transmitted through said cable to start said electronic clock.

Abstract: A timer device, which displays a load operation state, includes a clock counter, a load counter, a display and a controller. The display displays a count value of the load counter when the load counter is counting and displays a count value of the clock counter otherwise. The controller causes the display to flash in synchronism with the changing of the count of the load counter when the load counter is being operated.

Abstract: An electrical timer for a household appliance typically has an integrated circuit including an internal presettable clock registering the time of day, an internal register storing a presettable activation time, and a gate generating an activation signal when an activation enable signal is present and the clock registers the activation time. To prevent an activation signal from being generated on a daily basis without manual intervention, a bistable circuit is provided to generate the activation enable signal in response to a cycle enable signal received from the appliance operator. The bistable circuit is set to activate the activation enable signal upon receipt of the cycle enable signal, and is reset by the activation enable signal to disable the activation enable signal. For a coffee maker, the bistable circuit is preferably reset by the activation signal at the active-to-inactive transition signalling the end of brewing.

Abstract: A method of measuring the response time of an electrical instrument which generates an output signal in response to the application of a specified input, wherein the output signal varies as a function of time and when subjected to a step input approaches a steady-state value, comprises the steps of: (a) applying a step input of predetermined value to the electrical instrument to generate an output signal; (b) simultaneously starting a timer; (c) comparing the output signal to a reference signal to generate a stop signal when the output signal is substantially equal to the reference signal, the reference signal being a specified percentage of the steady-state value of the output signal corresponding to the predetermined value of the step input; and (d) applying the stop signal when generated to stop the timer.

Abstract: A digital time meter for use in a vehicle or other motorized equipment for sensing, accumulating, displaying and retaining the total time a monitored signal from the vehicle or the equipment is present employs a crystal oscillator time base to time the monitored signal. The meter uses integrated circuits to count pulses emanating from the time base in order to accumulate the total time the monitored signal is present. These integrated circuits also have decoder/driver circuitry with multiplexing capabilities to operate a digital display. Power to operate the meter is obtained from the monitored signal when said signal is present, and a replaceable internal battery when said signal is absent. The battery can be replaced without affecting the timing and accumulating functions of the meter provided the monitored signal is present. When the monitored signal is absent, a display switching circuit disables the display to prolong battery life.

Abstract: A microcomputer based monitor and display system for a refrigerator in which visual indicia are provided to indicate to the user the degree of door usage on a rolling average time basis. Threshold time limits are established to correspond to heavy, normal and light usage. The actual door-open time is sensed and accumulated in successive time segments. The rolling average door open time over a predetermined number of time segments is calculated at the end of each time segment and the appropriate lamp is lit depending on how the calculated average door-open time compares to the established threshold values.

Abstract: A drag race reaction timer including a displacement measuring means comprising a roller contained within a housing and a switch operable upon contact with said roller. Circuitry is provided to activate yellow and green lamps simulating the start of a drag race and to determine the time difference between the appearance of the green lamp and displacement of the auto by a predetermined distance. If the auto moves the predetermined distance before the appearance of the green light, a red light is activated.

Abstract: When a door of a microwave oven is opened during a programmed cooking operation, a door open monitoring circuit provides a door open signal to a microcomputer so that the microcomputer interrupts to execute the programmed cooking operation. A control circuit measures time lapsed from the re-closure of the door to provide the microcomputer with a control signal indicative of whether a cooking switch has been operated within a predetermined period of time after the re-closure of the door. In response to the control signal, the microcomputer executes the remaining programmed cooking operation in case that the cooking switch has been operated within the predetermined period of time or clears it otherwise. The function of the control circuit may be performed by the microcomputer.

Abstract: Additional fields of application are provided for an electronic clock striking mechanism. In particular, a modular unit for a clock striking mechanism comprising an operating device, together with a clock circuit, and optionally a battery space, is built into a living room phono installation and connected by means of a selector circuit with a speaker. This arrangement makes possible the emission of acoustic time information synchronously with the time display of quartz-stabilized living room clocks that are potentially present, without the need for synchronization with the clock circuit in the clock striking mechanism which is also stabilized by quartz vibrations.

Abstract: Presented hereby is a means for measuring elapsed time commencing with a start signal, after which first and second items may be removed from respective, individual stands for the performance of specific functions and ending with the return of an item to its specific stand. The apparatus comprises a pair of stands for receiving beverage containers in combination with means to optically sense the presence or absence of containers on their stands and light sequence starting means and time recording means responsive to the optical detectors.

Abstract: An indicating electronic timer useful for timing processing events and for controlling a process measures the elapsed time from a moment at which a process variable attains a predetermined value and produces a signal which varies in accordance with the elapsed time. During a timing operation, the signal is displayed on a display device which normally displays the process variable, and may be such that the display device indicates the percentage of a predetermined time interval which has elapsed. The timer may be conveniently implemented with relatively inexpensive integrated circuits, such as a variable oscillator, binary counters, and D/A converters.

Abstract: An instrument that receives pulses from a primary external source and one or more secondary external sources and determines when there is coincidence between the primary and one of the secondary sources. The instrument generates a finite time window (coincidence aperture) during which coincidence is defined to have occurred. The time intervals between coincidence apertures in which coincidences occur are measured.

Abstract: Apparatus having a plurality of signal channels, a plurality of stopwatch circuits and a plurality of time lapse displays interconnected so that the relative time lapses in a series of related occurrences can be displayed.

Abstract: A hand-written pattern is introduced through a matrix input means and stored in a matrix memory. An alarm time is set and stored in an alarm time memory. A detection circuit develops a detection output when the current time reaches the alarm time set in the alarm time memory. In response to the detection output, the hand-written pattern stored in the matrix memory is read out and displayed on a matrix display panel.