Abstract:
A dual mode light operated timing device includes a light sensor for generating a light sensor signal when light is detected; a first input device for generating a first programming signal; a second input device for generating a second programming signal; a switch for connecting and disconnecting power from a power supply to an electronic device; and a processor for receiving the light sensor signal and when light is detected by the light sensor operating the timing device in a daytime mode by controlling the switch based on the first programming signal, and when light is not detected by the light sensor operating the timing device in a nighttime mode by controlling the switch based on the second programming signal.

Description:
REFERENCE TO PRIOR APPLICATIONS 
       [0001]    This application claims the benefit of U.S. Provisional Application No. 61/819,062, filed May 3, 2013, the contents of which are incorporated herein by reference in its entirety. 
     
    
     BACKGROUND 
       [0002]    Automatic control of electric devices has developed throughout the electrical age. Lighting, air conditioning, and filtration systems, to name a few, often require the switching on and off of electric power to properly and economically operate the electric device. 
         [0003]    Leaving a light on all day so that at dusk and into darkness the light will be available is a poor use of electricity and would increase costs of supplying light at night. Running an air conditioning system at identical modes during the heat of the day and the cooler night increases cooling costs above and beyond what is necessary for a comfortable indoor environment. Operating modes of a pool filter system during the daylight hours when use is high and the heat of the sun is greatest are different from the operating modes required during the night hours when use is low and the sun is not actively affecting the chemical balance of the pool water. 
         [0004]    Various systems have been available to control these electric devices. Among these control devices are mechanical timers and light sensors. 
         [0005]    Mechanical timers were introduced having analog clock-like mechanisms and mechanical pegs or slides to physically and mechanically throw a switch between its on and off positions. The mechanical clock mechanisms often wear out and fault. The on/off switch mechanisms, whether in the pegs or sliders or switch itself, often fail after a short period of time. 
         [0006]    Light sensors are typically utilized in systems to turn on a light. Light sensor systems determine when the amount of ambient light falls below a threshold level. When this absence of light is determined, the system will trigger a switch to supply power to the light. 
         [0007]    This disclosure describes improvements over these prior art technologies. 
       SUMMARY 
       [0008]    Accordingly, a dual mode light operated timing device is provided. The timing device includes a light sensor for generating a light sensor signal when light is detected; a first input device for generating a first programming signal; a second input device for generating a second programming signal; a switch for connecting and disconnecting power from a power supply to an electronic device; and a processor for receiving the light sensor signal and when light is detected by the light sensor operating the timing device in a daytime mode by controlling the switch based on the first programming signal, and when light is not detected by the light sensor operating the timing device in a nighttime mode by controlling the switch based on the second programming signal. 
         [0009]    Accordingly, a method for controlling power to an electric device is provided. The method includes receiving at a processor a light sensor signal when light is detected by a light sensor; receiving at the processor from a first input device a first programming signal, receiving at the processor from a second input device a second programming signal; and connecting and disconnecting power from a power supply to an electronic device, wherein when light is detected by the light sensor the processor is programmed to operate the timing device in a daytime mode by controlling the switch based on the first programming signal, and when light is not detected by the light sensor the processor is programmed to operate the timing device in a nighttime mode by controlling the switch based on the second programming signal. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0010]    The present disclosure will become more readily apparent from he specific description accompanied by the following drawings, in which: 
           [0011]      FIG. 1  is diagram illustrating a timing device according the present disclosure; 
           [0012]      FIG. 2  is a block diagram of the timing device control circuitry according to the present disclosure; 
           [0013]      FIG. 3  is a schematic diagram of the timing device according to the present disclosure; and 
           [0014]      FIG. 4  is a diagram illustrating other timing devices according to the present disclosure. 
       
    
    
       [0015]    Like reference numerals indicate similar parts throughout the figures. 
       DETAILED DESCRIPTION 
       [0016]    The present disclosure may be understood more readily by reference to the following detailed description of the disclosure taken in connection with the accompanying drawing figures, which form a part of this disclosure. It is to be understood that this disclosure is not limited to the specific devices, methods, conditions or parameters described and/or shown herein, and that the terminology used herein is for the purpose of describing particular embodiments by way of example only and is not intended to be limiting of the claimed disclosure. 
         [0017]    Also, as used in the specification and including the appended claims, the singular forms “a,” “an,” and “the” include the plural, and reference to a particular numerical value includes at least that particular value, unless the context clearly dictates otherwise. Ranges may be expressed herein as from “about” or “approximately” one particular value and/or to “about” or “approximately” another particular value. When such a range is expressed, another embodiment includes from the one particular value and/or to the other particular value. Similarly, when values are expressed as approximations, by use of the antecedent “about,” it will be understood that the particular value forms another embodiment. It is also understood that all spatial references, such as, for example, horizontal, vertical, top, upper, lower, bottom, left and right, are for illustrative purposes only and can be varied within the scope of the disclosure. 
         [0018]    Reference will now be made in detail the exemplary embodiments of the present disclosure, which are illustrated in the accompanying figures. 
         [0019]      FIG. 1  is a diagram of a light controlled timing device according to the present disclosure. Shown in  FIG. 1  is timing device  100 . Timing device  100  includes photo diodes PD 1  and PD 2 , light emitting diodes (LEDs) LED 1 -LED 8 , receptacle  20 , cover  30  and casing  40 . Power is supplied to the timing device from a power source through a power cord or hard-wired electrical connection (not shown in  FIG. 1  and partially shown in  FIG. 4 ). 
         [0020]    As will be more apparent later, cover  30  is transparent or translucent to light to permit photo diodes PD 1 /PD 2  to detect the ambient light even when cover  30  is closed. Further, cover  30  can be self closing to allow for weather resistant operation in outdoor environments. In addition casing  40  and the other components can also be of weather resistant material to permit weather resistant operation in outdoor environments. Other weather resisting components are contemplated, e.g. a seal on cover  30  to seal against casing  40 . 
         [0021]      FIG. 2  is a block diagram of the control circuit of timing device  100 . LEDs LED 1 -LED 8 , photo diodes PD 1 -PD 2  and switches SW 1 -SW 2  are shown. Also shown are processor  10 , relay RY, and switch SW 3 . Switch SW 3  connects/disconnects Vin and Vout based on the state of relay RY. In the present disclosure Vin and Vout can be high current and high voltage such as 120 or 240 volts at 10, 15 or 20 amps. Other voltage/ampere levels are contemplated. Processor  10  is a specialty processor and is specifically programmed with a non-transitory program to operate the timing device  100  as described herein. 
         [0022]      FIG. 3  is a schematic diagram of the control circuit of timing device  100 . It is noted that although  2  photo diodes are shown in  FIGS. 2 and 3 , one photo diode can be used in the operation of the timing device through simple circuit design and processor programming. Processor  10  is illustrated as specialty processor IC1. 
         [0023]    In operation, timing device  100  has 2 main modes of operation: daytime mode and nighttime mode. Processor  10  of timing device  100  determines which mode to operate in based on the signals received from photo diodes PD 1 /PD 2 . If photo diode PD 1  senses light, processor  10  operates timing device  100  in daytime mode. If photo diode PD 2  does not sense light, processor  10  operates timing device  100  in nighttime mode. As described above, 1 photo diode can be used in stead of 2. When controlling a pool filter, the dual modes permit the filter to operate for a preset number of hours during the day, but allows for a different preset operation during the night, which allows for a more optimal operation. 
         [0024]    Dual mode light operated timing device  100  is initially connected to a power supply. After connection to the power supply, timing device  100  is ready for programming. It is understood that a default mode can be set to control timing device  100  without the need for further programming. The default mode can be selected from any of the following mode descriptions, or from others that fall within the scope and spirit of the present disclosure. 
         [0025]    Switches SW 1 /SW 2  are used to program timing device  100 . Switches SW 1 /SW 2  are described herein as push button switches, but other input devices are contemplated. In the present disclosure, switch SW 1  is used to program the daytime mode and switch SW 2  is used to program the nighttime mode. 
         [0026]    By pressing switch SW 1  processor cycles through the preset timing durations to connect power to Vout for daytime mode. For example, pressing SW 1  once, twice, thrice or four times can cycle timing duration through 2 hours, 4 hours, 6 hours and always on, respectively, during the daytime mode. Other timing duration schemes are contemplated. One or more LEDs from LED 1 -LED 4  would also light up to indicate the timing duration selected. 
         [0027]    By pressing switch SW 2  processor cycles through the preset timing durations to connect power to Vout for nighttime mode. For example, pressing SW 2  once, twice, thrice or four times can cycle timing duration through 2 hours, 4 hours, 6 hours and always on, respectively, during the nighttime mode. Other timing duration schemes are contemplated. One or more LEDs from LED 5 -LED 8  would also light up to indicate the timing duration selected. 
         [0028]    Based on the selected or default programming, processor  10  will energize or de-energize relay RY to connect or disconnect power between Vin and Vout to supply power to the connected electrical device, e.g. the pool filter, for the programmed timing durations. 
         [0029]    For example, once light is detected, timing device  100  enters daytime mode. If 6 hours was selected, processor  10  will energize relay RY for 6 hours to close switch SW 3  and connect power from Vin to Vout. Processor  10  can set a countdown timer to track the time the elapses between the energizing of relay RY and 6 hours later (in this example). After 6 hours has passed, processor  10  will de-energize relay RY and disconnect power between Vin and Vout. For the remainder of the daylight hours, no power will be supplied to Vout, thus maintaining the connected electrical device in an off state. 
         [0030]    Once light is no longer detected, timing device  100  enters nighttime mode. If 4 hours was selected, processor  10  will energize relay RY for 4 hours to close switch SW 3  and connect power from Vin to Vout. Processor  10  can set a countdown timer to track the time the elapses between the energizing of relay RY and 4 hours later (in this example). After 4 hours has passed, processor  10  will de-energize relay RY and disconnect power between Vin and Vout. For the remainder of the night hours, no power will be supplied to Vout, thus maintaining the connected electrical device in an off state. 
         [0031]    Timing device  100  can operate an electrical device for preset timing durations during both a daytime mode and a nighttime mode a more effective and economical operation. In addition, timing device  100  does not suffer the problems of existing mechanical timers. 
         [0032]      FIG. 4  is a diagram of alternate embodiments of a timing device according to the present disclosure. Timing devices  200  and  300  are larger versions designed to accommodate components for higher amperages. Timing device  200  is shown having a twist lock receptacle. Other features and operations are similar to those described above. 
         [0033]    The present disclosure has been described herein in connection with a pool filtration system. Other applications are contemplated. 
         [0034]    Where this application has listed the steps of a method or procedure in a specific order, it may be possible, or even expedient in certain circumstances, to change the order in which some steps are performed, and it is intended that the particular steps of the method or procedure claim set forth herebelow not be construed as being order-specific unless such order specificity is expressly stated in the claim. 
         [0035]    While the preferred embodiments of the devices and methods have been described in reference to the environment in which they were developed, they are merely illustrative of the principles of the inventions. Modification or combinations of the above-described assemblies, other embodiments, configurations, and methods for carrying out the invention, and variations of aspects of the invention that are obvious to those of skill in the art are intended to be within the scope of the claims.