Showing papers on "Timer published in 1973"

Navigational light system

Abstract: A flashing light timer for a navigational light having provision to send, receive and utilize a synchronizing signal in which a plurality of lights have their timers connected together so as to flash simultaneously, but will still operate in the event any one of the navigational lights fail. A coded timer for controlling the flashing code of a navigational light having a plurality of time constant circuits connected to a counter for readily changing the flashing code of a light. A navigational light having a logical circuit for sensing a burned out lamp without requiring a resistive element. A lamp changing circuit that allows the new lamp to be placed accurately into operative position. And a circuit for switching off power from the navigational light during the lamp changing process for preventing sparking of the electrical contacts.

Method and apparatus for actuating downhole devices

Abstract: To actuate downhole devices in accordance with the disclosure, fluid is pumped through the drill string at a rate that creates a preselected pressure condition in the drill string. At such preselected pressure condition, a timer is actuated that continues to run as long as the preselected pressure condition exists. If the pressure condition is maintained for a length of time sufficient for the timer to time out, the downhole device will be actuated. The device is deactuated by circulating fluid through the drill string to create a second pressure condition that actuates a timer that runs as long as the preselected pressure condition is maintained. When the timer times out, it deactivates the device. In another embodiment, the particular device to be actuated is selected by rotation of the drill string after the timer times out. It is deactuated by creating a particular flow condition until the timer times out. A third embodiment permits selection of simultaneous functions by the flow-time method and deactuation by stopping fluid circulation.

Power supply for calculators

Abstract: To avoid useless power consumption in electronic apparatus equipped with display units, for example, such as electronic desk-top calculators with light-emitting diodes, a pair of timer arrangements are provided between the display units and power source thereof. The first timer arrangment serves to turn the display units from the first display condition to the second display condition or more particularly reduce brightness of the display units. After operating the first timer arrangment, power supply is inhibited to at least the display units by means of the second timer arrangment.

Defrost timer arrangement for making clear ice

Abstract: A clear cube ice maker has a control circuit incorporating the defrost timer of a freezer and a bistable relay switch in the harvest mechanism The relay switch, in response to a signal from the defrost timer, conditions the ice maker for a deferred harvest when the weigh switch is open (ice bucket full or ice bucket not in place) at the time of the signal or during the harvest The relay switch is also in a circuit with an extra tray bottom heater to prevent the water from freezing to the bottom of the tray while awaiting the deferred harvest and is closed by the defrost timer and opened by a cam in the harvest mechanism

Built-in television timer and locking mechanism

Abstract: A timer mechanism is supported relative to the television cabinet for controlling the operational circuitry of the television, whereby the duration of television operation is controlled by the timer. Means are provided for locking the timer after it is set to preclude readjustment thereof without unlocking the same, and a timer bypass switch may be used to enable normal television operation without the timer.

Television timer to regulate television viewing time

Abstract: A timer and electrical receptacle controlled thereby are positioned within a container having a top which can be locked in a closed position to prevent access to the interior of the container. An electrical cord extends through an opening in the container and is adapted for connection to a source of electrical energy to provide power to the electrical receptacle as controlled by the timer, and a notch formed in one of the walls of the container is adapted for receipt of the power cord from an electrical appliance for connection in the electrical receptacle, the notch and the movable top of the container cooperating to prevent removal of the power cord.

Temperature responsive cooking timer

Abstract: A digital cooking timer responsive to the temperature of a cooking medium and incorporating minimum and maximum time decoders to insure that the cooking period is within a predetermined range is described. An interval timer sets up a counting period upon immersion of the product in the cooking medium but is inhibited from starting its counting function by the minimum time decoder until elapse of a fixed time period. After elapse of the fixed time period, the interval timer is enabled when and if the cooking medium reaches a predetermined temperature. The maximum time decoder provides an override control that energizes the control device after a fixed period in the absence of an energizing signal for the control device from the interval timer.

Light and chime control system

Abstract: A daylight sensor and a headlight sensor are connected in a variable voltage divider. When darkness turns the daylight sensor off and headlights turn a sensor on, a potential is provided to a voltage gate which is sufficient to break down a zener diode and gate current to a timer circuit. A diode in the voltage gate prevents reverse flow of current from a timer. A timer circuit contains a capacitor and resistor which discharges the capacitor. When the voltage is gated to the timer circuit and during the time that capacitor maintains a sufficient potential, a light switch is held on. A triac in the light switch control the lights. Approximately 3 seconds after the capacitor in the timer is charged to its potential, a transistor is switched on, placing a ground potential to the midpoint of the voltage divider to cut off the gate voltage. A chime operator is activated by sampling the potential from the variable voltage divider to slowly ring a door chime as an automobile is sensed. House and garage lights are lighted automatically a short time after a doorbell is rung at night to suggest a human response to the doorbell.

Electronic interval timer

Abstract: An electronic interval timer with an input means for setting an interval and a trigger switch for starting the timer. Actuating the trigger switch loads a number representing the interval into a register and clears a counter. Subsequent clock pulses pass through an enabled gating circuit and advance the counter. A comparator energizes an output circuit until the values in the counter and the register are equal. While the output circuit is energized, the trigger switch is disabled and operation of the input means does not affect the timer.

Automatic animal feeder

Abstract: A pet feeding apparatus includes a tray assembly having a number of compartments in which food and/or liquids can be placed. The tray assembly is mounted on a rotating housing and is partially enclosed by a cover having at least one aperture which provides access to the tray compartment adjacent to the aperture. A timer activates a motor which rotates the tray assembly beneath the cover so that the cover aperture provides access to the various tray compartments at predetermined time intervals.

Digital wrist watch having timer function

Abstract: A digital wrist watch is provided with a quartz oscillator, counting and distribution circuits and a digital electronic display device. The watch is provided with a memory circuit for the performance of a timer function. A switch and selecting circuit is provided for the selective application of either time keeping or timer signals to the display device so that said display device may serve both the time keeping and timer functions. Said switch and selecting circuit also serves to permit the use of a single set of switches for both time correction and setting of the timer function.

Computer cooking means

Abstract: A computer-controller device for controlling the cooking operation of a cooking apparatus, the device having a manually settable weight input for indicating a single selected indicated weight applicable to all meat items and corresponding to the weight of a particular meat item to be cooked. The device has a second manually settable input for indicating a selected variable under other than the weight of the meat. The device has a timer that has a time period output operatively associated with the inputs to provide as an output a cooking time period for the particular meat item computed as a function of both of the inputs. The timer has a time period setting indicator operatively interconnected to the inputs to indicate the computed cooking time period as selected by the inputs. The timer has a reference means movable relative to the indicator to indicate lapsing time during the running of the computed cooking time period.

System for inhibiting motor vehicle operation by inebriated drivers

Abstract: A motor vehicle is equipped with a system for inhibiting operation by a drunk driver. A sample of the driver''s breath is directed to a chamber containing chemical granules which react with alcohol fumes exothermally. A temperature responsive switch, which is in the form of a capillary tube partially filled with mercury and having electrodes at each end, extends through the chemical granules and is connected in a control circuit. The control circuit includes timers, alarms, and a relay for opening the ignition circuit of the vehicle. Upon actuation of the temperature responsive switch, an alarm and a timer are energized. After a predetermined time interval, the timer energizes a second alarm and a second timer. The second timer, after a predetermined time interval, energizes the relay to open the ignition circuit of the vehicle. Three such chambers are provided, each having a temperature responsive switch. A flow control valve directs the sample of the driver''s breath to one of the chambers, and a selective switch is provided for connecting the temperature responsive switch in the selected chamber to the control circuit.

Program timing circuitry for central data processor of digital communications system

Abstract: Circuitry is disclosed for monitoring the execution of programs in a central processor of a digital communications system. For recovery programs under the normal mode the program must ''''punch in'''' with a recovery program timer at designated intervals, or the circuitry generates a system error level signal. In a special mode, punch in may occur at any time prior to a designated time. Further, for programs other than recovery programs, an error bistable circuit monitors the output of a real time timer which is incremented every basic order time (i.e., machine cycle time) and which will cause the system to enter a recovery phase if it overflows prior to its being reset.

Pressure powered aerosol timer

Abstract: A pressure powered timer for aerosol spray cans operates automatically to periodically spray the contents of the can at desired, predetermined intervals, the pressure within the can being utilized to actuate the timer.

Gas range timer control

Abstract: An automatic timer for a gas range control arm which replaces the conventional range knob on the outside of the range. The arm is employed to turn on the range and set its temperature to the desired level. Timer mechanism is employed to turn off the range automatically by means of the arm after a desired time interval has elapsed.

Contact pacer timer

Abstract: A contact pacer timer intended to be worn about a portion of an individual''s body and generated time related pacing signals of a frequency settable by the individual for use in pacing the body movement of the individual such as for jogging, walking and the like, the device including an electrical circuit defining a multi-vibrator which is manually settable by a time-frequency selector to govern the output frequency of the circuit, and an acoustical convertor for amplifying and converting the vibrating output to an audible signal which is audible to the individual wearing the device.

Two level volume control for clock radio and the like

Abstract: A circuit arrangement is provided for obtaining two volume levels for clock radios. One volume level is for providing a soft volume during an initial slumber period of the clock radio when it is intended that persons go to sleep, and the other volume level is a loud volume during a wake-up period when it is intended that persons are to be awakened from their sleep. The two level volume control includes a latching circuit which has one of the components thereof arranged to be a switching element which is activated for changing the volume control of the clock radio to a lower volume during a slumber period. When the clock radio is deenergized by turning off the automatic timer switch the latching is also deenergized. When the clock radio is again energized by means of the conventional clock operated on-off switch the latching circuit remains deenergized thus causing automatic deenergization of the switching element automatically to increase the volume produced by the radio during a radio alarm period.

Timer for telephone toll calls and the like

Abstract: A toll call time indicator comprises a small case or housing suitable for location adjacent a telephone and which has three readily visible different colored lights or other indicators for advising the user of the passage of time. A switch on the casing, when actuated, starts the timer and actuates the first signal, at the end of a predetermined period a second signal is actuated to indicate passage of a major portion of the full time interval and the third signal is actuated at or near the end of the period. The lights or indicators are arranged to be readily visible at a distance and are useful for supervisory purposes.

Flame ignition and supervision system

Abstract: Disclosed is a valve control circuit for fuel burners and the like. Energy is received by an energy storage circuit and periodically is rapidly removed therefrom and transferred to a pulse circuit. The pulse circuit, responsive only to pulses, receives the energy pulses on discharge and provides a valve activating signal in response thereto. The system is failsafe inasmuch as component failure prevents the pulses from being supplied to the pulse circuit. Furthermore, limit apparatus prevents sufficient power from being directly supplied from the power source to the valve to cause actuation. Two timers are also provided to cause system lock out in the event of failure to ignite. Either timer is sufficient by itself to cause lock out so that if one of the timers fails, lock out is still achieved.

Strappable inactivity timer for data set

Abstract: A timer which monitors the inactivity of a data set for clearing and disconnecting an inactive data terminal from connection to another terminal transmission line network after a selected inactivity period has elapsed. A binary timer is reset by the presence of data and a carrier. Selectable combinations of timer output may be strapped to a decoder to permit selection of the inactivity period.

Solid state relay and timer housing means

Abstract: A solid state relay structure capable of replacing an electromagnetically operated relay. The relay includes a basic support on which up to four switching modules may be easily mounted. The basic support provides a housing for a printed circuit board which has circuits arranged to cause two of the switching modules to provide an instantaneous type switching contact operation and two of the modules to provide an OFF delay or ON delay type of switching contact operation. The basic support has a readily accessible adjustment knob which will permit the timing interval of the relay to be easily changed. Isolation between the solid state control circuit and the power switching circuits in the four modules is provided by reed switches in the switching modules and four magnet coil windings that are carried by the basic support structure.

Beacon marker interrupt device

Abstract: Apparatus for providing adjustable time-limited attenuation of a marker beacon receiver audio signal, comprising a variable attentuator connected between the audio signal source and the audio signal output, and shunted by a normally closed timer switch. An adjustable RC timing circuit, actuated by an automatic or manually operable mute switch, drives a two state amplifier, the output of which is connected to and operates the timer switch.

Solid-state timer switch providing ac power to a load for a predetermined time after a main source of power is removed

Abstract: A timing circuit utilizing a solid-state switching device, which may be a silicon-controlled rectifier, a transistor, or a triac, provides power to a load for a predetermined period of time.

Fail-safe electrical timer

Abstract: A device to deactivate an electrical circuit after a preset period of time. Deactivation is accomplished by the depletion of the power supply battery through a preset load which is an oscillator that is connected through an AC link into the circuit to be deactivated.

Melt cycle control system

Abstract: A system for controlling and regulating heat input to a commercial frypot during the melting of solid shortening in the frypot comprises a timer motor which operates through a by-pass switch to cyclically enable and disable the burners of the frypot. A melt thermostat is responsive to the presence of warm liquid shortening at a predetermined level in the frypot, and upon actuation functions to automatically transfer control over the operation of the frypot to conventional instrumentalities, such as a high limit thermostat and an operating thermostat.

Timer having two separate cam means and means advancing the cam means at different speeds

Abstract: In the driving of two separate cam means, a speed reduction in a ratio greater than the ratio of the number of two teeth in two gears of a gear train is provided through the cooperation of gears, one having at least one tooth, the remainder being smooth, the other having teeth one half tooth out of phase with each other.

Method and apparatus for digitally operating a compass card in a navigation system

Abstract: A pictorial navigation system includes a stepper motor driven compass card. Digital information is picked off of a gyro, decoded to determine direction and processed through a motor sequencer to drive the stepper motor in the proper direction for compass card rotation. Fast and slow driving rates are provided by the utilization of a digital timer and pulse rate generator.

Lamp failure detection system

Abstract: This application relates to a system of capacitor-discharge flash lamps which are flashed in sequence from a master timer. The invention consists of an apparatus or system for making available at the master timer information as to which lamps are flashing and which lamps are not flashing without adding wiring to the system for this purpose.

Timed fluid valve

Abstract: A timed fluid valve including a body having an inlet and outlet and a valve controlling flow between the inlet and outlet A timer means is mounted on the body and has a timer shaft associated therewith which is adapted for both rotary and axial movement A valve actuating mechanism is operatively connected to the valve and operatively connected to the timer shaft The valve actuating mechanism includes a first cam member operatively connected to the timer means and a second cam member operatively connected to the valve The first cam member is operable to actuate the second cam only after the timer means has been actuated to a predetermined minimum time setting and only operative to retain the valve in fully open position for the minimum time period The valve actuating mechanism is further operative to fully close the valve instantaneously after the predetermined minimum time period has elapsed A shaft actuating knob is connected to the timer shaft through one-way clutch whereby the timer can be actuated by the knob only in the direction for setting the timer and opening valve The timer shaft is adapted for both rotatable movement and axial movement It is first rotated to position the first cam member to the desired time setting and is then actuated in an axial direction to cause said first cam member to contact said second cam member and thereby move the valve to its fully open position where it is retained until the minimum time period has elapsed