Bizarre Patents
Wearable Device For Feeding and Observing Birds and Other Flying Animals
A device for feeding and observing flying animals comprising a hat, a support mounted on the hat and extending outward from the hat, and a feeder mounted on the support.
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| Number | Title | Issue Date |
| 7800321 | Method for the detection of the rotational position of the rotor of a DC motor with commutator In a method for the detection of the rotational position of the rotor of a DC motor with commutator by evaluating the time development of a rotor current signal of the DC motor, said signal comprising a periodic waviness around an average value and comprising curren... | 09/21/2010 |
| 7696705 | Method for measuring the rotational speed of an EC motor A method for measuring the rotational speed of an EC motor having a primary part including a winding, and a secondary part having magnet segments offset with respect to one another in the circumferential direction and magnetized in alternatingly opposite directions,... | 04/13/2010 |
| 7330004 | Method and apparatus for quiet variable motor speed control An apparatus for controlling the speed of an AC motor comprising a switch adapted to be coupled in parallel with power terminals for the AC motor; a capacitor coupled in series with the parallel combination of the switch and the motor; the capacitor adapted to provi... | 02/12/2008 |
| 7323839 | Direct current motor controlling method A direct current motor controlling method includes a mean for transforming a duty signal to computed value by a microprocessor unit. The microprocessor unit computes the computed value and then produces a target value by executing a dichotomy method, a rotation meth... | 01/29/2008 |
| 7262570 | Motor controller with enhanced noise immunity unbuffered hall sensors A method and apparatus of interfacing a Hall sensor to a commutation circuit comprises receiving output signals from the Hall sensor; detecting when the Hall sensor output signals are within a predetermined range; generating commutation output signals when the Hall ... | 08/28/2007 |
| 7196491 | System and method for stall detection of a motor A motor starter system comprises solid state switches for connection between an AC line and motor terminals for controlling application of AC power to the motor. A voltage sensor senses AC line voltage and the motor terminal voltage. Current sensors sense motor curr... | 03/27/2007 |
| 7161318 | Regulating device for a motor The invention relates to a regulating device (1) for a motor, comprising a housing (2) which can be associated with said motor and in which a control unit (5) and an actuator (6) are arranged. Due to heat-related reasons, said device can ... | 01/09/2007 |
| 7129657 | Single track brush-based position encoder for rotating shaft A position sensor generates a signal representative of the angular position and, if desired, angular velocity of a rotating object using only a single circular track and plural brushes that ride on the track when the object rotates. The single circular track can hav... | 10/31/2006 |
| 7122982 | DC motor rotation information detecting device A rotation information detection device detects rotation information of a DC motor based on a surge component waveform superimposed on a voltage waveform between the terminals of the DC motor or a current waveform of the DC motor, a circuit is provided which supplie... | 10/17/2006 |
| 7106013 | Motor drive apparatus driving 3-phase brushless motor without using hall sensor A motor drive apparatus includes a comparison circuit comparing voltages of 3-phase coil terminals and the voltage of a neutral point terminal of a 3-phase brushless motor to determine which voltage is higher/lower, a zero ampere current detection circuit detecting,... | 09/12/2006 |
| 7064509 | Apparatus for DC motor position detection with capacitive ripple current extraction An apparatus for determining angular positions of DC motor includes a capacitor connected in parallel with the DC motor. The current flowing through the capacitor, at any given time, is an AC ripple current responsive to a commutation event of the DC motor. The capa... | 06/20/2006 |
| 7034477 | Domestic electrical appliance including an electric motor Domestic electrical appliance, including a universal electric motor powered by direct current via an electrical circuit linked to a DC electrical voltage source, said circuit including a chopper arrangement, including a capacitor in parallel with the DC voltage sour... | 04/25/2006 |
| 6970093 | Method for configuring the alarm device of an electrical motor and motor for implementing said method If a motor becomes defective, e.g. stops running, runs too slowly, or becomes too hot, many customers demand the generation of an alarm signal, i.e. ask for an alarm device provided on the motor. The following method is used for configuring this alarm signal: At lea... | 11/29/2005 |
| 6940241 | Circuit using current limiting to reduce power consumption of actuator with DC brush motor A drive circuit including a motor for positioning a damper from a rest position to a stalled position and protect the drive mechanism from damage due to increased current to the drive motor when the damper stalls by including a current limiter to prevent the current... | 09/06/2005 |
| 6873124 | Rotational speed controller for electrically powered tools A rotational speed controller maintains a constant low speed during idling, a constant high speed when a load is applied and controls motor rotational speed in the range between low and high speed to ensure safe operation when used in an electrically powered tool. W... | 03/29/2005 |
| 6864648 | Vector flux machine A motor that includes a stator that contains a first winding and a second winding driven by alternating currents. The rotor is arranged to rotate relative to the stator and contains a third winding and a fourth winding for generating a magnetic field with an amplitu... | 03/08/2005 |
| 6838830 | Half-bridge Half-bridge circuit, especially for connection of an electric motor in a vehicle, with a low side circuit element (1) with a control input (3, G1), a high side circuit element (2) with a control input (6, G2), in which the l... | 01/04/2005 |
| 6798162 | 12/42 volt DC brush motor control system A system 10 provides a variable output voltage to a DC brush motor. The system includes a DC brush motor 14, a DC voltage source 12, a step-up, step-down DC/DC converter 16 including a switch 18. The DC/DC converter is constructed ... | 09/28/2004 |
| 6664750 | D.C. motor bridge coil driver An H-type motor bridge coil driver circuit is implemented with an electronic switch in each leg segment of an H-shaped circuit, this bridge circuit having its side legs each connected between a power supply and ground, with the inductive load of a motor c... | 12/16/2003 |
| 6580874 | Field current control method in motor In separately excited DC brush motors ML and MR, an armature current control circuit for feeding power to armatures 61 and a field current control circuit for feeding power to a field system 62 form separate systems and are independently controllable exce... | 06/17/2003 |
| 6448727 | Mains braking device for a line-powered power tool A mains braking device for a line-powered power tool includes a circuit arrangement with a two-pole switch which switches between the motor mode and the braking mode. The inventive braking device further includes an electronic power circuit breaker or tri... | 09/10/2002 |
| 6380702 | Commutator motor control system The invention relates to a control system for a commutator motor which is operated by phase-fired control. Allocation of a first and second control device in a single operating state without transition makes it possible to obtain constant jolting rotation... | 04/30/2002 |
| 6353297 | Series motor A series motor with commutator is disclosed which is especially suited as universal motor for a braked power tool. The series motor comprises a switch for switching between a motor mode and a braking mode, wherein, in motor mode, at least one field windin... | 03/05/2002 |
| 6326757 | Rotational pulse generating circuit for commutator DC motors A rotational pulse signal generating circuit for a commutator DC motor is made up of a filter device for eliminating noise from the motor, a cutoff frequency of the filter device being variable depending on an external signal; a pulse shaping device for g... | 12/04/2001 |
| 6252363 | Circuit for timed position control of device driven by a DC motor The present invention relates to an electronic circuit that interrupts the application of electrical power to a motor after a predetermined period of time. The electronic circuit is disposed between a motor which drives a device from an initial position t... | 06/26/2001 |
| 6191542 | Method and apparatus for cleaning a DC motor commutator-brush interface Commutators on a direct current motor run at low speed for an extended period of time get covered with a coating that makes the interface between the commutator and the brushes unreliable especially with the low speed, low current operation. This is espec... | 02/20/2001 |
| 6172472 | Control system for a two-terminal electric motor connected to a voltage network having two lines A two-terminal motor can be connected to a two-line voltage supply network utilizing a controller in which a control element is in series with the current-measuring component and both are connected to a microcontroller.... | 01/09/2001 |
| 6172473 | Device for determining rotational number of DC motors A device for determining a rotational number of an electric dc motor which drives a moving body of an automobile accessory such a sunroof, or a glass pane of a power window includes a switched capacitance filter for eliminating noise from the motor, a cut... | 01/09/2001 |
| 6130533 | Fan speed detecting circuit A fan speed detecting circuit includes a resistor installed in the grounding line of the power circuit of the DC fan motor of a cooling fan, a capacitor, a diode connected between the resistor and the capacitor, and a comparator having an inverter termina... | 10/10/2000 |
| 5994860 | Series wound motor with electrical brake In a series-wound motor with electric brake, which comprises an armature provided with an armature winding and at least two exciter coils mounted on pole shoes as well as switchgear which, in the operative phase of the motor, serially connect the exciter ... | 11/30/1999 |
| 5990639 | Phase controller for intermittently supplying an AC motor with electric power An improved phase controller is operatively connected to the operating lever or trigger of an electrically powered tool for supplying its motor with electric power from an ac power supply. It includes a device for establishing a divisional voltage derived... | 11/23/1999 |
| 5856731 | Electric screwdriver A universal motor which operates an electric tool is controlled by a phase-gating controller for determining variable rotational speeds. The phase-gating controller can be switched over to wave-packet-controlled phase-gating control mode in order to be ab... | 01/05/1999 |
| 5760553 | Speed control method for an electric motor A speed control method for controlling an electric motor by varying the supply duration of the motor, comprises the steps of: initially storing, for a constant speed to be obtained, the curve of the current in the motor as a function of the supply duration; se... | 06/02/1998 |
| 5646497 | Switching arrangement for controlling the rpm of electric motors A switching arrangement for controlling the rpm constancy between idling and full power of universal motors in electric tools has a phase-shift control (IC) which, for setting the set value, is connected at an output via an adjusting resistor with a tap o... | 07/08/1997 |
| 5432421 | Process for detecting the position, direction of movement and dynamic characteristic values of remote-controlled displacement of an adjustable object The invention relates to a process for detecting the position and direction of movement and for detecting the dynamic characteristic values of remote-controlled displacements of an adjustable object. According to the invention a signal is detected and eva... | 07/11/1995 |
| 5196747 | Universal electric motor In the case of a universal electric motor for any kind of drive, with a stator package, a rotatably mounted rotor with commutator, as well as end shields on both sides that also constitute the bearings for the rotor and a switching ring that can be rotate... | 03/23/1993 |
| 5017846 | Stall protection circuit for an electronically commutated motor A control circuit for a system including an electronically commutated motor. A tachometer pulse signal generator generates a signal representative of the rotational speed of the rotatable assembly of the motor and having a duty cycle. The control circuit ... | 05/21/1991 |
| 4532458 | Variable-speed electrical machines An arrangement to provide variation of the speed or other operating parameters of an electrical machine without connection to the rotor. The machine is of the induction type having a winding in separate parts to create a flux movable in the air-gap differ... | 07/30/1985 |
| 4494054 | Electric power delivery system and method A power control that delivers electrical power to a A.C. motor at a frequency which is controlled by the motor speed itself without the need for any separate speed sensing circuit. The power control accomplished this by allowing a small second current to ... | 01/15/1985 |
| 4484115 | Brushless motor A brushless motor comprising seven or more armature windings mounted on a stator, a field magnet mounted on a rotating shaft to rotate therewith with respect to the armature windings, a plurality of semiconductor commutating devices, each being connected ... | 11/20/1984 |
