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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 |
| 5555840 | Dart game score board A dart game score board includes a case having a plurality of walled compartments therein. A removable front cover of the case forms one wall of the compartments, with the front cover having formed therein a plurality of groups of window openings arranged... | 09/17/1996 |
| 5228770 | Search light A hand held search light includes a miniaturized electronic control circuit for igniting and operating an arc lamp in the light. A lamp mounting arrangement is disclosed for shock mounting the arc lamp, including arrangement to center and focus the light ... | 07/20/1993 |
| 5144207 | Circuit and method for igniting and operating an arc lamp A miniaturized electronic control circuit and method for igniting and controlling the operation of an arc lamp in a hand held search light is disclosed. A modulator provides output pulses at a variable duty cycle to a switched regulator which provides an ... | 09/01/1992 |
| 5142458 | Search light A hand held search light includes a miniaturized electronic control circuit for igniting and operating an arc lamp in the light. A lamp mounting arrangement is disclosed for shock mounting the arc lamp, including an arrangement to center and focus the lig... | 08/25/1992 |
| 5072347 | Search light A hand held search light includes a miniaturized electronic control circuit for igniting and operating an arc lamp in the light. Lamp mounting means is disclosed for shock mounting the arc lamp, including means to center and focus the light beam emitted b... | 12/10/1991 |
| 5066904 | Coaxial current sensors A sensor for measuring large magnitudes of A.C. current utilizes a current divider having parallel conductors and a current comparator coupled to one of the conductors so arranged as to perform first and second stages of scaling of the A.C. current to obt... | 11/19/1991 |
| 5059896 | Electronic watthour meter An electronic watthour meter is digitally configurable to operate as several different types of watthour meters for metering electrical energy from a variety of different electric utility services. Automatic scaling of line input currents is provided to s... | 10/22/1991 |
| 4999572 | Redundant pulse monitoring in electric energy metering system Redundant pulses generated by independently operable pulse sources in an electricity meter are accumulated as pulse counts in a pair of channels of a multi-channel recorder. The pulse counts are compared to verify the accuracy of the pulses counted by eac... | 03/12/1991 |
| 4999575 | Power supply and monitor for controlling an electrical load following a power outage A metering system includes an electronic register having a non-volatile storage into which data is written upon the detection of a power outage. A power supply and monitor provides a regulated voltage for the electronic register and contains a capacitor w... | 03/12/1991 |
| 4556843 | Electronic solid state Q-hour meter and/or combination Q-hour and kilowatt-hour meter An electronic solid state Q-hour meter for measuring leading and lagging VARS quantities of electric power over a defined range of power factor. The Q-hour meter comprises first and second time division/pulse width-amplitude modulated/analog multiplier ci... | 12/03/1985 |
| 4551621 | Flip-over mechanism A flip-over mechanism for a cyclometer register includes an eccentrically balanced fly-wheel freely rotatable on a drum shaft between a driver drum and a first driven drum, each drum being marked with decimal digits 0-9. The driver drum is driven in smoot... | 11/05/1985 |
| 4547730 | Light load adjust apparatus for electric meter A light load adjustment for an electric meter includes a frame attachable to a core of a voltage coil and a pole-shading element slideable with respect to the frame. The pole-shading element includes a windowed plate or a pair of tabs interposeable betwee... | 10/15/1985 |
| 4536759 | Multi-format data display A display controller drives a nine digit, seven segment display in accordance with desired display formats for preselected lengths of time. The controller accepts control commands and data by means of a serial three wire asynchronous link. The display con... | 08/20/1985 |
| 4535287 | Electronic watt/watthour meter with automatic error correction and high frequency digital output An improved solid state semiconductor integrated circuit electronic watt/watthour meter circuit having analog and high frequency digital outputs with automatic error correction. The meter comprises first and second transformers for developing first and se... | 08/13/1985 |
| 4495463 | Electronic watt and/or watthour measuring circuit having active load terminated current sensor for sensing current and providing automatic zero-offset of current sensor DC offset error potentials An electronic watt and kilowatt hour measuring circuit susceptible of being fabricated for the most part in solid state semiconductor monolithic integrated circuit form is provided. The electronic measuring circuit uses an active load terminated current t... | 01/22/1985 |
| 4491793 | Detachable magnetic coupler communication apparatus Disclosed is a meter cover (housing) mounted receptacle and detachable magnetic coupler incorporating optical communication devices for electronically communicating with electronic circuitry housed within the meter cover.... | 01/01/1985 |
| 4491791 | Sensing switch for a detachable communications probe A magnetically coupled communication port includes a push-button switch operable by depressing a plunger slidably mounted in a detachable coupler assembly for providing an enable signal upon coupling of the detachable coupler assembly to a fixed coupler a... | 01/01/1985 |
| 4491792 | Sensing switch for a magnetically coupled communications port A magnetically coupled communications port includes a switch for providing an enable signal upon coupling of a detachable magnetic coupler assembly to a fixed coupler assembly. The switch is magnetically activated and is positioned on the fixed coupler as... | 01/01/1985 |
| 4485343 | Electronic watt and watthour meter having analog and digital outputs with automatic error correction An improved solid state semiconductor electronic combined watthour and watt meter circuit providing both analog and digital outputs and having automatic error correction comprising first and second input transformers for developing first and second signal... | 11/27/1984 |
| 4465970 | Method and apparatus for multiple rate metering of electrical energy A programmable time-of-use metering system is disclosed for metering electrical energy consumption at multiple rates depending on the time of day, time of week and time of year in which the energy is being consumed. A method for registering total energy c... | 08/14/1984 |
| 4451784 | Electronic watt transducer circuit with constant DC current output proportional to watts An electronic wattmeter in the form of an electronic watt-transducer circuit requiring a minimum number of components that can be fabricated by monolithic semiconductor integrated circuit manufacturing techniques and which provides a direct current output... | 05/29/1984 |
| 4446462 | Method and apparatus for multiple frequency transmission of information in a digital communication system A meter terminal unit, for acquiring information and transmitting the acquired information to a central reading and control unit over utility power transmission lines, includes a transmitter portion for synthesizing and modulating carrier waveforms, the f... | 05/01/1984 |
| 4416478 | Tamper deterent seal providing indication of tampering for watthour meters A combination meter, meter box and frangible seal for deterring unauthorized access to the meter and visually indicating, when the seal is broken, at least an unauthorized attempt has been made to access the meter.... | 11/22/1983 |
| 4414510 | Low cost sensing system and method employing anistropic magneto-resistive ferrite member A sensor comprising a member of ferromagnetic ferrite material having anistropic magneto-resistive properties wherein the resistivity characteristics of the ferrite member vary in response to variations in strength of a magnetic field applied longitudinal... | 11/08/1983 |
| 4396915 | Automatic meter reading and control system A remote automatic utility reading system includes a reading control center for transmitting commands to and receiving measurement data from remote terminal units via a command responsive control unit. The control unit is characterized by a computer havin... | 08/02/1983 |
| 4393501 | Line protocol for communication system In a communication system, a line protocol format with a variable bit rate and low bit overhead provides for the high integrity, synchronous exchange of digital signal information between master and slave processing units, with master processing unit cont... | 07/12/1983 |
| 4326263 | Method and apparatus for controlling a plurality of like equipments A programmable data processor or controller serving as the main control in a control system contains an executive program for controlling the transfer of information between the processor and system equipment, updating that information during on-line cont... | 04/20/1982 |
| 4315251 | Automatic meter reading and control system An automatic meter reading and control system for communicating with remote terminal points includes a reading control center which selectively communicates with a meter terminal unit at each terminal point by way of a section control unit, each section c... | 02/09/1982 |
| 4301445 | Communication system and method having wide dynamic range digital gain control An automatic gain control system and method, utilizing a digital logic attenuator and control in a communication receiver, operates linearly over a wide dynamic range in the amplitude of input signals applied to the receiver to eliminate distortion and fr... | 11/17/1981 |
| 4297635 | Watthour meter and battery retaining apparatus therefor An apparatus for retaining a replaceable battery comprised of a unitary structure having a chamber therein for receiving a battery and a resilient retaining means cooperating in the chamber with the battery provides a structure for easily replacing a batt... | 10/27/1981 |
| 4286214 | Current sensor for phase inversion-modulation of AC signals A circuit for sensing the magnitude of an AC signal applied to the circuit includes control means for reversing the polarity of the AC signal to thereby generate an output signal which is proportional in amplitude to the magnitude of the AC signal and whi... | 08/25/1981 |
| 4278940 | Means for automatically compensating DC magnetization in a transformer Apparatus for providing automatic compensation of direct current magnetization of a current transformer in an alternating current watthour meter utilizing a magnetic field sensor and electronic circuitry to keep the transformer operating in its linear reg... | 07/14/1981 |
| 4276644 | Tester and method for checking meter encoders in automatic meter reading systems Apparatus for use in an automatic meter reading system for displaying meter encoder generated dial readings and detecting errors in response to information contained in the encoder meter dial readings. Errors are detected through interdial checking by com... | 06/30/1981 |
| 4264897 | Meter register encoder including electronics providing remote reading capability A self-contained meter register optical encoder including electronic signal generation, surge protection and power supply circuitry is remotely readable to supply timing and data signals to an external device when energized from an external power source.... | 04/28/1981 |
| 4255705 | Peak detection and electronic compensation of D. C. saturation magnetization in current transformers used in watt hour meter installations A watt hour meter installation is described which is of the type including an input transformer having an input winding for connection to an alternating current power supply line, an output winding for connection to a watt hour meter for measuring alterna... | 03/10/1981 |
| 4255704 | Zero crossing detection and electronic compensation of D. C. saturation magnetization in current transformers used in watthour meter installations A watthour meter installation of the type including an input current transformer having an input winding for connection to an AC power supply line, an output winding for connection to a watthour meter for measuring AC power being consumed and a core on wh... | 03/10/1981 |
| 4217546 | Electronic energy consumption meter and system with automatic error correction An electronic energy consumption meter and system includes means for automatically correcting for overall system signal and voltage errors and offset errors created by circuits in the system to provide a meter requiring no adjustments for the compensation... | 08/12/1980 |
| 4205290 | Transformer construction A transformer having diagonally disposed high voltage bushings and core assembly provides a transformer of smaller size than other transformers of a given voltage rating, and a transformer capable of being installed adjacent other transformers of the same... | 05/27/1980 |
| 4204195 | Meter terminal unit for use in automatic remote meter reading and control system A meter terminal unit for use in automatic meter reading systems of the type including a control center for transmitting commands to and receiving measurement data from the terminal unit via a distribution unit serving several terminal units. The terminal... | 05/20/1980 |
| 4204194 | Meter terminal unit for use in automatic remote meter reading and control system A meter terminal unit for use in automatic meter reading systems of the type including a control center for transmitting commands to and receiving measurement data from the terminal unit via a distribution unit serving several terminal units. The terminal... | 05/20/1980 |
