 Loudspeaker apparatus |
| It is the principal aim of the invention to provide a loudspeaker apparatus which overcomes the ... |
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| Stereo electroacoustic transducing |
| What is claimed is: 1. A stereo loudspeaker system for providing good stereo imaging over a wide ... |
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| Loudspeaker system |
| It is an object of the present invention to provide a loudspeaker system which increases the size ... |
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| Method of simulating a room and/or sound impression |
| OF THE PREFERRED EMBODIMENTS FIG. 1a of the drawing shows a possible method of determining the ... |
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| Acoustic display system and method for ultrasonic imaging |
| The invention provides an ultrasonic imaging system with a three-dimensional acoustic display. In ... |
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| Panel-form microphones |
| What is claimed is: 1. A panel-form microphone for operation in a predetermined frequency range, ... |
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| Audio system for a computer display |
| OF THE INVENTION Referring to the drawing there is shown an essentially rectangular screen S of an ... |
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| Apparatus and method for adjusting audio equipment in acoustic environments |
| The foregoing objects are achieved by this invention in which the signal in each channel of a ... |
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| Method for the authentication of data |
| It is an aim of the invention to increase the possibilities of the method of authentication so that ... |
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| Stereo signal communication system and method |
| OF SPECIFIC EMBODIMENTS Referring to the specific embodiment shown in the drawings, and without ... |
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Hot water tank assembly
| Details |
Inventors: Eckman, Charles M.;
Assignee: Energy Convertors, Inc. (Dallas, PA)
Primary Examiner: Hoang; Tu B.
Assistant Examiner:
Attorney, Agent or Firm: Duane, Morris & Heckscher
Hot water heaters are provided which contain improved temperature control devices and multiple resistance wire heating elements. The temperature control devices selectively deactivate at least one of the resistance wires to conserve electricity and preserve a steady-state hot beverage or hot water service temperature. |
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DETAILED DESCRIPTION The present invention provides in a first embodiment, a hot water heater for a portable dispenser containing a storage tank for containing water.
The heater further includes a heating element for providing electric resistance heating to a portion of the water in the tank.
The heating element includes first and second resistance wires which are capable of heating the water to at least that of a hot beverage temperature, at least above 100.
degree.
.
Upon obtaining that temperature, a first resistance wire is selectively discontinued, and the second resistance wire continues to maintain the water at said hot beverage temperature.
Accordingly, the hot water heaters of this invention maintain the water in the tank at a steady-state temperature indefinitely until the unit is turned off.
The second resistance wire can be designed to generate only the amount of power needed to account for what the fluid in the container will lose in radiant and convective cooling.
When one compares the principles of this invention to an ordinary single heating element fluid heater, the energy conservation savings will become apparent.
Ordinary single element heaters typically develop a temperature cycle from 175.
degree.
to 195.
degree.
F.
over a 20-60 minute period.
Since the heating element is constantly "kicking" on and off, such water heaters are relatively insufficient.
The water heaters of this invention, on the other hand, employ a large wattage source, for example, 480 watts, generated by one or both resistance wires, followed by a maintenance wattage of much lower power, for example, 80 watts, generated by a single resistance wire.
This temperature control can be easily accommodated, for example, by the use of thermostats strategically located within the storage tank at different levels in the fluid.
In a further embodiment of this invention, a multiple resistance heating element for a water heater is provided.
The heating element contains at least first and second resistance wire coils insulated from a corrosion-resistant sheath by an insulating medium packed around the wire coils
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Audio Signal Processing 
