Test initiation apparatus with continuous or pulse input
First Claim
1. In an electrical unit which can be tested using an intermittently incident energy beam which originates at a location displaced from the unit, an electrical circuit comprising:
- means, responsive to the intermittently incident energy beam, for generating a pulsed electrical signal;
energy storage means for accumulating electrical energy in response to the pulsed electrical signal; and
means, responsive to the presence of a predetermined quantity of accumulated electrical energy, for initiating testing of the electrical unit.
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Accused Products
Abstract
A system for testing a remotely located sensing unit includes a photosensor located within the sensing unit. A control beam of incident electromagnetic energy can be provided from a remotely located portable source such as a flashlight. Directing the beam of radiant energy from the flashlight against the sensor in the unit causes the unit to initiate a test sequence. The unit can be equipped with a photo-detector to terminate an alarm generated in response to a sensed condition. The unit can include a sonic detector. Control circuitry in the unit can decode a sensed encoded incident beam to minimize false tests or to provide multiple remotely initiated functions.
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Citations
9 Claims
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1. In an electrical unit which can be tested using an intermittently incident energy beam which originates at a location displaced from the unit, an electrical circuit comprising:
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means, responsive to the intermittently incident energy beam, for generating a pulsed electrical signal; energy storage means for accumulating electrical energy in response to the pulsed electrical signal; and means, responsive to the presence of a predetermined quantity of accumulated electrical energy, for initiating testing of the electrical unit. - View Dependent Claims (2, 3, 4, 5)
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6. A unit, silenceable with an external beam of incident energy, for sensing the presence of a predetermined condition and for sounding an alarm responsive thereto comprising:
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condition sensing means; means, responsive to said sensing means, for sounding an alarm; photosensitive means, responsive to the beam of incident energy, for generating a selected electrical signal and means, responsive to said electrical signal for terminating said alarm for a predetermined period of time.
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7. A unit testable from a remote location utilizing a beam of incident radiant energy comprising:
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a housing; first incident energy detecting means carried by said housing; second incident energy detecting means spaced from said first means and carried by said housing; and means, coupled to said first and second means, for initiating a test condition in response to the beam of energy being incident on only one of said detecting means.
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8. A method of controlling a remotely located electrical unit which is carrying out a predetermined function using a selected, pulsed command beam generated outside of the unit comprising the steps of:
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directing the selected command beam at a region of the unit; detecting the presence of the incident command beam when it encounters the region; and terminating the predetermined function in response to detection of a predetermined number of pulses of the incident command beam.
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9. An apparatus for remotely initiating a test condition in a selected testable electrical unit which includes a unit test device, for only a selected time interval, the apparatus comprising:
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a source of radiant energy separate from the unit; means, coupled to the electrical unit, for detecting incident radiant energy from said source and for generating a selected electrical condition in response thereto only for as long as the incident radiant energy is detected; and means for coupling said selected electrical condition to the test device thereby testing the unit for only the duration of the selected electrical condition.
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Specification