Shutter control system
First Claim
1. A shutter light controlling system for use with a shutter having a plurality of light passing orientations in which the light to be controlled from a source is incident on and passes through the shutter, said shutter tending to pass said light to be controlled at different intensities according to the light passing orientation of the shutter relative to the source, said system comprising:
- drive means adapted to place said shutter in a given light passing orientation in response to an applied drive input signal;
first control means responsive to the light to be controlled for generating a first drive means input signal to place the shutter in a first orientation at which the intensity of the light passed by said shutter is a maximum; and
second control means responsive to the intensity of the light passed by said shutter for generating a second drive means input signal for overriding said first input signal to place the shutter at a second orientation at which the intensity of light passed by said shutter is at any selected value less than said maximum.
1 Assignment
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Accused Products
Abstract
A skylight shutter is driven by a battery-powered d.c. motor through transistor switches operated by Schmitt triggers. A sun sensor circuit generates a first shutter control signal so the shutter tracks the sun and passes maximum light. A room sensor circuit generates a second control signal which overrides the first control signal to reduce the room light to a desired selected level. A night sensor circuit overrides the first and second control signals for closing the shutters to minimize radiation losses during the night.
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Citations
13 Claims
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1. A shutter light controlling system for use with a shutter having a plurality of light passing orientations in which the light to be controlled from a source is incident on and passes through the shutter, said shutter tending to pass said light to be controlled at different intensities according to the light passing orientation of the shutter relative to the source, said system comprising:
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drive means adapted to place said shutter in a given light passing orientation in response to an applied drive input signal; first control means responsive to the light to be controlled for generating a first drive means input signal to place the shutter in a first orientation at which the intensity of the light passed by said shutter is a maximum; and second control means responsive to the intensity of the light passed by said shutter for generating a second drive means input signal for overriding said first input signal to place the shutter at a second orientation at which the intensity of light passed by said shutter is at any selected value less than said maximum. - View Dependent Claims (2, 3, 4, 5)
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6. A shutter light controlling system comprising:
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drive means for placing the shutter in a given light passing state in response to an applied drive input signal; first sensor means for generating a first set of output signals manifesting the light passing state of said shutter; second sensor means for generating a second set of output signals manifesting the intensity of light passed by said shutter relative to any selected intensity; and circuit means responsive to said first and second sets of output signals for producing a first drive input signal to place said shutter in that light passing state at which the intensity of light passed by said shutter is at said selected intensity. - View Dependent Claims (7, 8, 9)
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10. A shutter light controlling system comprising:
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drive means adapted for placing said shutter in a given light passing state in response to an applied drive input signal, said state having a range of values from a minimum to a maximum light passing value; first control means adapted to be attached to said shutter for generating said drive input signal having a first value for placing said shutter in the maximum light passing state; and second control means responsive to the intensity of light passed by said shutter for generating a second drive means input signal having a second value for opening the shutter in response to a decrease in intensity of light passed by the shutter below any selected threshold light intensity value, said second drive means input signal overriding said first drive means input signal to place said shutter in the state corresponding to said selected threshold value when said selected threshold value is less than the intensity of the maximum passed light, and a third drive means input signal having a third value for overriding said first drive means input signal to close the shutter in response to an increase in intensity of light passed by the shutter above said selected threshold light intensity value to thereby maintain said selected threshold value. - View Dependent Claims (11)
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12. A shutter sunlight controlling system, said shutter including a plurality of parallel rotatable slats which overlap at their edges in the closed state and are rotatable about parallel axes to place them in the open state, said system comprising:
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drive means adapted to place said slats in a given light passing state in response to an applied drive input signal; first control means including solar tracking means adapted to be attached to said shutter for providing a first drive means input signal to orient the slats so that the light passed by the slats is a maximum; and second control means including settable light threshold means responsive to the light passed by said slats for providing a second drive means input signal, said second signal overriding the first input signal to place the slats in a light passing state at which the intensity of light passed by said slats is at any selected value less than said maximum. - View Dependent Claims (13)
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Specification