Abstract: A spa control system where the spa's heater is disconnected from the power source anytime the water in the heater is at a higher temperature than that set by the user or more than an absolute temperature. Since the control system has a regular temperature management control, this will only occur due to a problem in the spa or the control system itself. Independent paths between a pair of temperature sensors in the heater and the relays that connect line voltage to the heater are provided to meet the safety requirements of Underwriters Laboratories (UL). Two sensors in the heater are co-located in a metal tube, placed near the heater element. A novel flow test to prevent dry fire is also taught.

Abstract: A spa control system where the spa's heater is disconnected from the power source anytime the water in the heater is at a higher temperature than that set by the user by a prescribed amount, or more an absolute value that is higher than normal operating temperatures. Since the control system has a regular temperature management system this will only occur because of a problem in the spa or the control system itself. Independent paths between a pair of temperature sensors in the heater and the relays that connect line voltage to the heater are provided to meet the safety requirements of UL. Two sensors in the heater are co-located in a metal tube, placed near the heater.

Abstract: A spa control system where the spa's heater is disconnected from the power source anytime the water in the heater is at a higher temperature than that set by the user by a prescribed amount. Since the control system has a regular temperature management'system this will only occur because of a problem in the spa or the control system itself. Independent paths between a pair of temperature sensors in the heater and the relays that connect line voltage to the heater are provided to meet the safety requirements of UL. Two sensors in the heater are co-located in a metal tube, placed near the heater.

Abstract: A dental tool which combines a rubber tip gum massager with a floss threader that aids in positioning floss under fixed bridges. The tool is especially useful in cleaning under bridge work that is in the back of the mouth. It is common practice to employ floss with a few inches of rigid line attached to the actual floss material so that the rigid line can be pushed under the bridge work with the fingers and then pulled through to position the actual flossing material for the back and forth cleaning process. Even with the rigid line threader, however, the process is sometimes difficult for a dental professional and almost impossible for an individual because it is hard to feel when the threader is in the right position. A common rubber tip gum messenger on a handle can easily find the right spot for the threader because of the tactical feed back as the rubber tip is passed over the teeth and gums.

Abstract: A battery powered LED lamp suitable for mounting on the inside surface of a cabinet door is described. The LEDs are arranged such that their light will illuminate the inside of the cabinet and its contents when the cabinet door is opened and left in a position roughly ninety degrees from its closed position. In a favorite embodiment, a photo sensor sends a signal to a microprocessor whenever the light level at the photo sensor is suddenly increased, which would likely happen whenever the door is opened. The microprocessor reacts to the signal by activating one or more LEDs for a prescribed period of time. Multiple LEDs are arranged in a pattern that will broadcast light into several shelves within the cabinet at the same time.

Abstract: The present invention describes a rescue light with a LED light source that meets a minimum requirement of 0.75 candela (cd) of intensity, over a full hemisphere of visibility, with a duration of 8 hours or more. The invention requires only 3 volts of battery power from relatively small batteries, making the invention small and lightweight. In one favorite embodiment the LED is a specially constructed device that uses a blue LED die enclosed with a uniform layer of phosphor on the outer surface of the LED body, which provides an equally bright white light in all directions. Due to the low power requirements of the LED, the device can easily produce white light over an entire hemisphere at the required brightness level for longer than the required amount of time.

Abstract: The present invention describes a control circuit to be used in a lamp adapter that gives the user the ability to flash the main bulb on and off and, at the same time, flash a colored LED to indicate the purpose of the main bulb flashing. A first brief power interruption from the main switch starts the main bulb flashing and energizes a LED of a first color. A second interruption continues the flashing and energizes a LED of a second color. The intended purpose of the invention is be draw attention to a home and indicate whether or not an emergency exists.

Abstract: The present invention describes a maintenance support system that can be used to automatically isolate defective components in a complex electrical apparatus. The system includes programming instructions that activate individual components of the electrical operation in a non-operational sequence, while collecting performance data for each tested component. Performance data is provided by existing feedback devices in the apparatus as well as by additional sensors which are a part of the new system. All collected data and available background information are analyzed by programming instructions that consider, among other things, the probability of failure in certain components. The final outcome is a component replacement recommendation on a local or remote computer display that combines the performance data, history, probability and operational knowledge of the apparatus, thereby improving the performance of service personnel.

Abstract: The present invention describes a maintenance support system that can be used to automatically isolate defective components in a complex electrical apparatus. The system includes programming instructions that activate individual components of the electrical operation in a non-operational sequence, while collecting performance data for each tested component. Performance data is provided by existing feedback devices in the apparatus as well as by additional sensors which are a part of the new system. All collected data and available background information are analyzed by programming instructions that consider, among other things, the probability of failure in certain components. The final outcome is a component replacement recommendation on a local or remote computer display that combines the performance data, history, probability and operational knowledge of the apparatus, thereby improving the performance of service personnel.