Bizarre Patents
Method and apparatus for making a drink hop along a bar or counter
A method for generating a drink which appears to hop from a remote spot on the bar or counter and take one or more leaps, before landing in a patron's glass.
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| Number | Title | Issue Date |
| 8129981 | Apparatus for detecting a fault in the balancing unit An apparatus can be coupled to at least two lines for transmitting a differential signal, which is substantially symmetrical to a predefined reference potential, and/or for receiving such a differential signal. The apparatus includes a balancing unit, which can be c... | 03/06/2012 |
| 7884596 | Self-balancing frequency determining bridge A self-balancing Wheatstone bridge that provides frequency and power information. The frequency information obtained can be applied to correct the power measurement to provide excellent match, excellent frequency insensitivity, good dynamic range, good frequency ran... | 02/08/2011 |
| 7268573 | Apparatus for generating test stimulus signal having current regardless of internal impedance changes of device under test An apparatus for generating a current source test stimulus signal having a constant current regardless of an internal impedance value of a device under test includes a voltage source generation unit and a voltage to current (V/I) converter. The voltage source genera... | 09/11/2007 |
| 7246015 | Alternator tester An alternator tester is provided for testing an alternator of a vehicle while the alternator is coupled to the vehicle. A sensor is configured to couple to the vehicle and sense a signal related to operation of the alternator. A memory contains data related to opera... | 07/17/2007 |
| 7224559 | Differential current detection A detection circuit detects a difference between a source current and a return current. The detection circuit includes a constantly biased magnetic core through which conductors of the source and return currents extend, and a sense winding around the core. The sense... | 05/29/2007 |
| 7187160 | Systems and methods for measuring an RMS voltage An embodiment of a method for measuring an RMS voltage of an arbitrary time-varying waveform includes: a) coupling said arbitrary time-varying waveform to said thermally sensitive device; b) decoupling said arbitrary time-varying waveform from said thermally sensiti... | 03/06/2007 |
| 7154333 | Amplifier for inductive loads An amplifier circuit controls the output current through an inductive load. A signal is amplified by one or more op amps, and sourced into a back to back coupling of an NPN transistor and a PNP transistor. In a positive circuit segment, current is sourced to an indu... | 12/26/2006 |
| 6747205 | Device for assisting in the measurement of the earth resistance The invention relates to a device for assisting in the measurement of the earth resistance comprising a ground rod with a wire coiled up on a reel or the like, and electrical connecting means for connecting the wire to the ground rod. To provide such a device which ... | 06/08/2004 |
| 6714881 | Time reference compensation for improved metering accuracy A method for time reference compensation in a power metering system, the method comprising monitoring a time-dependent characteristic of incoming AC power over a predetermined local time interval, comparing the monitored characteristic over the predetermined local t... | 03/30/2004 |
| 6657442 | Micromechanical alternating and direct voltage reference apparatus An AC/DC voltage reference system has at least one micromechanically fabricated electrode pair having first and second electrodes facing each other so that the electrodes are disposed at a distance from each other, whereby at least one of the electrodes i... | 12/02/2003 |
| 6582840 | Fuel cell stack coolant conductivity sensor using differential voltage measurements A method and apparatus for detecting leakage current in the coolant of a fuel cell stack. The invention eliminates the use of a conductivity sensor by using a voltmeter to measure the voltage across the coolant. If the coolant voltage is at or below a pre... | 06/24/2003 |
| 6118409 | Method and device for inspecting at least one antenna branch, in particular in a vehicle In order to inspect at least one antenna branch (A1, A2, . . . An), in particular in a vehicle, a power level to be radiated is initially fed into the antenna branch, after which a power level which is reflected in the antenna branch is sensed. Then, a re... | 09/12/2000 |
| 5877619 | Battery-operated hand field-strength meter and method of null balancing same A method of null balancing a hand field-strength meter is described in which the effect of the measurement probe on the balancing is suppressed by short-circuiting the measurement probe by two MOS-FETs connected in series across the probe outputs so that ... | 03/02/1999 |
| 5461322 | Autonulling DC bridge for real-time sensor transduction and voltage measurements A feedback operated DC bridge circuit for monitoring the voltage variations in a voltage divider circuit using a voltage controlled resistance component to reach a null balance across the bridge. Amplification is provided at higher accuracy near the null ... | 10/24/1995 |
| 5313165 | Temperature-compensated apparatus for monitoring current having controlled sensitivity to supply voltage An apparatus for monitoring current through a lamp circuit that uses a series resistance shunt in the circuit with one end connected to a current source and the second end connected to the lamp. The apparatus includes a comparator that is connected across... | 05/17/1994 |
| 5291073 | Thermal power sensor A thermal power sensor for providing an output signal that is linearly related to the amount of power derived from a power source over a first range and that is square law related to the amount of power derived from a power source over a second range whic... | 03/01/1994 |
| 5264798 | Autonulling AC bridge using differential and integration feedback A self-contained autonulling bridge circuit based on phase-sensitive deteon of an impedance to be measured is described. The system utilizes a feedback structure to control a variable impedance in order to establish the null of the bridge. The system uti... | 11/23/1993 |
| 4982151 | Voltage measuring apparatus A voltage measuring apparatus comprises an optical probe furnished with an electro-optic material whose refractive index is changed in accordance with a voltage developing in a given part of an object and an auxiliary electrode for terminating electric li... | 01/01/1991 |
| 4795965 | Capacitance to voltage conversion circuit including a capacitive bridge and a capacitive offset A capacitance to voltage conversion circuit for converting changes in capacitance of a capacitive bridge-type probe to voltage includes a detector for detecting changes in an excitation signal across a sensitive arm of the probe due to changes in capacita... | 01/03/1989 |
| 4786859 | RMS measuring apparatus for AC/DC voltages A true RMS instrument using a multijunction thermal converter with two beaters automatically determines and displays the RMS value of an unknown voltage using two steps or modes. In an AC mode, the unknown voltage is attenuated and balanced in the thermal... | 11/22/1988 |
| 4782285 | Variable resolution control system A variable resolution system for a potentiometer converts the analog output of the potentiometer to digital steps which are multiplied to provide a number of digital output steps dependent upon the extent of potentiometer movement since last reversal. Upo... | 11/01/1988 |
| 4628257 | Wattmeter A differential thermal wattmeter of the type disclosed in U.S. Pat. No. 4,045,734 is modified to remove undesirable in-phase a.c. ripple at the fundamental frequency in the feedback path. This result is achieved by a closed loop system in which the in-pha... | 12/09/1986 |
| 4580062 | Safety shield control device An electrical interlock to prevent unauthorized access to potentially hazardous equipment and an associated detection circuit to detect if a safety shield or closure member is open, not securely closed or has been tampered with and to thereupon automatica... | 04/01/1986 |
| 4420745 | Security system A security system of the bridge circuit type has in one of its arms a conducting element whose impedance is to be monitored and in its other arms reference and/or compensating elements, for detecting an unbalance of the bridge resulting from a sudden chan... | 12/13/1983 |
| 4375616 | Non-loading digital voltmeter A substantially non-loading circuit for measuring voltages in a range with relatively high upper limit uses a resistive voltage divider for scaling down these voltages for application to a digital voltmeter capable of measuring voltages in a range with re... | 03/01/1983 |
| 4263583 | Digital alarm system with variable alarm hysteresis A digital alarm system for monitoring a variable process signal utilizing a variable, digitally controlled alarm hysteresis capability. The system includes a means for establishing a preselected count level at which an alarm condition occurs. The preselec... | 04/21/1981 |
| 4213088 | Voltage measuring circuit A voltage indicating meter is connected between the outputs of two high impedance operational amplifiers, the first of which receives an input signal to be measured through a range setting resistance dividing network and having a gain which can be set to ... | 07/15/1980 |
| 4206404 | Vacuum fluorescent indicator A vacuum fluorescent display has a filament heated below incandescence and phosphor coated anodes. A foraminous charge-control electrostatic lens between the filament and the viewer both controls uniform illumination of the anodes and also comprises part ... | 06/03/1980 |
| 4177423 | Bridge circuits A bridge circuit for measuring or use in a temperature-responsive servo-mechanism. A chain of four or alternatively five resistors is connected between power supply rails, an inner two resistors of the chain being shunted by the track of a potentiometer. ... | 12/04/1979 |
| 4165653 | Signal ratio indicator A pressure measuring system which includes a variable reluctance pressure transducer energized from an alternating voltage source, wherein the ratio of the output voltage to the source voltage is proportional to the pressure being sensed. Precision full w... | 08/28/1979 |
| 4156180 | Apparatus and method for detecting metabolic activity An apparatus and method for detecting metabolic activity in a medium which includes an electrical circuit suitable for passing electrical current through a medium which contains a suspected metabolic agent. The circuit includes means for generating a refe... | 05/22/1979 |
| 4110685 | Standing wave ratio measurement instrument The output voltages produced by two directional couplers are applied to analog circuitry for generating a voltage that is directly proportional to return loss. An analog meter scale is calibrated to indicate return loss in decibel units and/or voltage sta... | 08/29/1978 |
| 4071819 | Device for sensing the real part in a complex impedance A device for accurately measuring the quantative value of the real part of complex impedance without the measurement affecting or being affected by the reactive component of that impedance. The device is useful for impedance matching, and especially for t... | 01/31/1978 |
| 4028642 | Circuit for converting a temperature dependent input signal to a temperature independent output signal A bridge circuit for combination with a variable resistance sensor whose resistance may vary as a function of a sensed variable and also as a function of a parasitic variable such as, for example, temperature. The bridge circuit includes at least one vari... | 06/07/1977 |
| 3975669 | Electronic damper motor control There is disclosed a motor control circuit that is particularly useful for the control of a damper motor in a heating and ventilating system. The control circuit comprises a bridge circuit having a pair of operational amplifiers with cross connected input... | 08/17/1976 |
| 3970930 | Current meter The invention relates to the supervision of a measuring circuit which is connected to a load by way of measuring leads. This load is connected to a generator via supply leads. The load is bridged by a resistor. If one of the four said leads is interrupted... | 07/20/1976 |
