Abstract: Provided is a bath fluid heating system that includes an inlet, an outlet, a pump located in a fluid path extending between the inlet and the outlet, a heater located in the fluid path extending between the inlet and the outlet. During use, a bathing fluid is to flow into the inlet, to flow through the heater, to flow through the pump and to flow out of the outlet. The fluid path is oriented at an angle to facilitate drainage of substantially all of the bathing fluid from the fluid path.

Abstract: In some embodiments, a bathtub heating system may detect a temperature of bathtub fluid (e.g., water, mud, etc.) in a bathtub and may apply heat to the bathtub fluid to maintain a substantially constant temperature (or to provide a user indicated and/or predetermined temperature/time profile). In some embodiments, the bathtub heating system may not use a temperature sensor. For example, the bathtub heating system may use a fluid level sensor to detect when the bathtub fluid in the bathtub is at a sufficient height to operate and may apply a predetermined amount of power to the heating elements to approximately maintain the temperature of the bathtub fluid in the bathtub.

Abstract: A method and apparatus to be used for videoconferencing when the presentation is to include displays of documents or other visuals. A camera is focused on the document and detects when the document is being handled by the presenter. It automatically determines when to initially display the document, as well as when to update frames of data representing the document.