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The ice cream cone was invented at the St. Louis Worlds Fair by Ernest Hamwi in 1904. His waffle booth was next to an ice cream vendor who ran short of dishes. Hamwi rolled a waffle to hold ice cream and the cone was born.
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| Number | Title | Issue Date |
| 7800025 | Apparatus for controlling an electrical cooker and related method thereof The present invention provides a micro-control unit a RC oscillator for generating a reference clock, a plurality of touch switches for generating a transition signal indicating one of the touch switches being touched by human beings, a plurality of analog switches ... | 09/21/2010 |
| 7076324 | Directionless rotary encoder control system for a household appliance An embodiment of the present invention uses an on-board microcontroller of a household appliance to receive signals from a directionless encoder attached to a knob for receiving user input and processing the signals from the direction encoder according to a control ... | 07/11/2006 |
| 6888109 | Heating device A heating device for a gas sensor, in particular for use in the exhaust gas analysis of internal combustion engines, including a heating element having an electrical resistor layer. The heating element is embedded in a first insulation which in turn is surrounded, a... | 05/03/2005 |
| 6872922 | Method for operating a multi-stage electrical heater comprised of several heating elements A method for operating a multi-stage electrical heater comprised of several heating elements. In conventional multi-stage electrical heaters, the resistance value of the individual heating elements scatters. In order that the individual heating elements emit the sam... | 03/29/2005 |
| 5796076 | Sauna heater control A sauna heater control having a plurality of electrical heater elements for heating a sauna chamber, an alternating current heater power circuit, a half-wave rectifier for selective inclusion in the alternating current heater power circuit, a plurality of... | 08/18/1998 |
| 5748429 | Self checking temperature sensing circuit A self-checking temperature sensing circuit in which temperature sensitivity is provided by first and second resistive elements having positive and negative temperature coefficients respectively. The resistive elements are connected in parallel current pa... | 05/05/1998 |
| 5352862 | High wattage surface contact resistance heater A pliable high wattage electrical resistance contact heater which is operable at two wattage densities and which includes a first heating element which is thermostatically controlled so as to activate at predetermined ambient and/or surface temperatures a... | 10/04/1994 |
| 5014210 | Microprocessor controlled soldering station A soldering system includes M soldering tools, where M is ࣙ1 and is an integer and N soldering tips where N is ࣙ1 and is an integer with one of the N tips attached to one of the M soldering tools. The soldering system also includes a control circuit c... | 05/07/1991 |
| 4887092 | Thermal printing method In a prior art thermal printing method, the heating elements of a thermal printing head are driven in such fashion that the temperature of each and every individual heating element is first measured individually and successively before this heating elemen... | 12/12/1989 |
| 4717924 | Thermal printing control system A control system for a thermal print head includes means for regulating the firing of the print elements with the proper pulse width to compensate for increasing substrate temperature. The control circuit is divided into two separate circuits--the driving... | 01/05/1988 |
| 4713525 | Microcomputer controlled instant electric water heating and delivery system A microcomputer operates in response to user selected flow rate and water temperature inputs to calculate the temperature difference between the cold water input and the hot water delivery output from a multisection continuous flow electric water heater w... | 12/15/1987 |
| 4638147 | Microprocessor controlled through-flow electric water heater A through-flow electric water heater has a cannister through which water to be heated flows and in which are disposed a first heating means comprising a plurality of electric heating elements and second heating means comprising at least one electric heati... | 01/20/1987 |
| 4538049 | Toaster oven A new and improved electric toaster oven is disclosed, wherein the heating ratio between upper and lower heat sources can be readily changed to suit the different requirements of the food item being cooked, while the rate at which the total heat is applie... | 08/27/1985 |
| 4513196 | Electric self-defrosting windshield heating arrangement providing fast or slow heat An electrically heatable self-defrosting windshield has a transparent panel, two low-resistance groups of wires embedded in the panel and defining a primary zone requiring rapid heating, and at least one high-resistance group of wires embedded in the pane... | 04/23/1985 |
| 4464564 | Current controller for heating stage on leitz microscope A current controller interface accepts a variable voltage at its input and develops a current at its output which corresponds directly with the input variable voltage. Its apparatus is usually associated with a program controller as an input and a microsc... | 08/07/1984 |
| 4352707 | Composite repair apparatus A composite repair device including a plurality of resistive heating zones, each having independent temperature and rate of temperature rise controls, to compensate for the greater heat loss at the outer areas of a composite patch.... | 10/05/1982 |
| 4088869 | Temperature limiting circuit for electric hair dryers A hair dryer includes a casing having an air inlet and an air exit defining an exit plane. A motor driven fan propels air through the casing between the air inlet and exit. Plural wattage electric heating elements are disposed in a heater box in the casin... | 05/09/1978 |
| 4066868 | Temperature control method and apparatus The disclosed invention describes an apparatus and method for bringing a system having high interactive portions to a predetermined temperature distribution. The invention includes a difference controller which provides, through two separate drivers, a fi... | 01/03/1978 |
