Bizarre Patents
Pizza Pie With Concentric Rings of Crust
A pizza mold for forming a plurality of concentric raised ridges of dough (i.e., crust) on the surface of a pizza pie.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 5032816 | Longitudinally contoured conductor for inductive electrical devices An improved conductor for an inductor device of the type having varying current carrying requirements along the length of the conductor, the improvement comprising having the conductor contoured such that the cross sectional area of the conductor varies s... | 07/16/1991 |
| 4990809 | Variable reluctance motor A high torque-to-low mass variable reluctance motor includes a cylindrical stator assembly having a plurality of stator segments circumaxially arranged about a rotor wherein adjacent stator segments are maintained in a spaced apart relation with one anoth... | 02/05/1991 |
| 4954740 | Stator winding for two-speed electrodynamic machines having fractional speed ratios A stator for electrodynamic machines provides for more efficient design by reducing the total number of stator legs required for two-speed, two-phase motors and for generators producing electrical power at either of two frequencies while operating at a co... | 09/04/1990 |
| 4894907 | Method of making a longitudinally contoured conductor for inductive electrical devices A method for making an improved conductor for an inductor device of the type having varying current carrying requirements along the length of the conductor, the improvement comprising having the conductor contoured such that the cross-sectional area of th... | 01/23/1990 |
| 4868477 | Method and apparatus for controlling torque and torque ripple in a variable reluctance motor Apparatus for controlling torque and torque ripple in a variable reluctance motor uses a generated torque waveform for each phase of the number of phases associated with the motor and corresponds to an electrical current having a predetermined constant ma... | 09/19/1989 |
| 4853631 | Magnetoresistive sensor having inter-leaved magnetoresistive elements for detecting encoded magnetic information A magnetoresistive sensor includes groups of MR elements arranged on a non-magnetic substrate for selective connection to detect and sense magnetic information recorded on a number of different diameter encoder wheels of which each diameter wheel may have... | 08/01/1989 |
| 4794511 | Apparatus and method for generating two-phase signals for use with a resolver to digital converter Two-phase voltage signals for use with a resolver-to-digital converter (RDC) are produced as a periodic function of permeance developed across an air gap between a rotor and stator wherein the permeance varies as a periodic sinusoidal function which can b... | 12/27/1988 |
| 4792709 | Winding for operation of a three-phase stepping motor from a two-phase drive A three-phase stepping motor having magnetically interacting stationary and moving members, the stationary member having first, second, and third sets of stator poles, each stator pole having thereon a coil for magnetic energization thereof. The coils on ... | 12/20/1988 |
| 4763052 | Method and means for driving a brushless D.C. motor A brushless D.C. motor drive circuit provides full available D.C. bus voltage to the motor during periods of motor speed acceleration and deceleration and modulated D.C. voltage to the motor during periods when no demands are made on the motor to accelera... | 08/09/1988 |
| 4761578 | Method and means for operating brushless DC motor with reversible DC power A circuit for operating a brushless DC motor, the circuit receiving as inputs the positive/negative, or negative/positive DC power normally applied to reverse a brush-type DC motor, with the polarity of the input power determining direction of rotation of... | 08/02/1988 |
| 4739201 | Means to reduce harmonic torque in electromagnetic machines An electromagnetic machine of the type having a moving member and a stationary member, with a set of structures on the moving member to magnetically interact with a set of structures on the stationary member, has an improved construction comprising displa... | 04/19/1988 |
| 4733117 | Reluctance synchro/resolver The pole members of each phase of a synchro have quadrifilar windings wherein each conductor is wound over six poles associated with a given phase. A voltage signal from an alternating current source is impressed across one conductor from each phase conne... | 03/22/1988 |
| 4733113 | Winding for operation of a three-phase stepping motor from a two-phase drive A three-phase stepping motor having first, second, and third sets of stator poles, with the first and second sets of stator poles having single coils thereon and the third set having dual or bifilar coils thereon. The coils on the first set of stator pole... | 03/22/1988 |
| 4689023 | Programmable electrical connector A physically programmable electrical connector 70 has a first plurality of interconnected conductive paths 71-78. A second plurality of conductors 103-110 and a third plurality of leads 71'-78' are connected to the conductive paths. Electrical discontinui... | 08/25/1987 |
| 4647829 | Means and method for stepping motor stabilization A mid-range stabilization circuit for use in a multiphase stepping motor control system having motor current controllers responsive to first and second reference signal inputs, the current controllers providing a level of current to the motor phases propo... | 03/03/1987 |
| 4647861 | Method and means for producing a D.C. signal proportional to the peak amplitude of an A.C. signal Method and means are disclosed for producing a D.C. signal proportional to the peak amplitude of an A.C. signal, which peak amplitude is proportional to the frequency of the A.C. signal. A second A.C. signal is generated from the first signal, having a fr... | 03/03/1987 |
| 4642494 | Means to improve performance of electric motors An electric motor having a rotor and a stator with two sets of stator poles. The poles of one set of stator poles are disposed in positions about the stator which they would normally occupy if all stator poles were disposed symmetrically about the rotor. ... | 02/10/1987 |
| 4636662 | Method and means for increasing the frequency of update of direction information contained in two sine waves in quadrature A method and means are provided for increasing the frequency of update of direction information contained in two essentially identical alternating current signals, essentially sinusoidal in waveform, and in quadrature. Eight electrical signals having rect... | 01/13/1987 |
| 4634948 | Stepping motor winding for bipolar drive A stator for a stepping motor, the stator having a plurality of salient poles and at least two windings, each winding comprising at least two conductors each of which is wound upon one or more separate poles. The conductors of each winding may be connecte... | 01/06/1987 |
| 4622686 | Up/down counter interface means An up/down counter interface converts input information suitable for the operation of one type up/down counter, which type receives input information in the form of a direct current logic signal indicating direction and a train of electric pulses represen... | 11/11/1986 |
| 4577146 | Variable autotransformer having an indexed stepping brush An adjustable voltage transformer having a commutating surface formed of segments of electrical conductors upon which a contact brush is movable while in electrical engagement therewith. Means are provided to "step" the brush between segments, so that whe... | 03/18/1986 |
| 4560970 | Variable transformer with multi-layer coil A coil for a variable transformer is provided having multiple layers of wire. Winding of such a coil is facilitated by providing an end form having a series of raised fins, or partitions, between which stacked layers of wire are held. The construction pro... | 12/24/1985 |
| 4558275 | Line voltage monitor system The Detector Module derives a synchronization signal from the half-wave crossovers of the AC power line. A half-wave peak detector detects the peak voltage of each half wave. An impulse detector detects the voltage of any impulses occurring during a half-... | 12/10/1985 |
| 4518907 | Digital motor control method and means A method and system for controlling a digital motor to allow operation in a microstepping mode at low velocities where microstepping is advantageous and to allow operation in a non-microstepping mode at high motor velocities to take advantage of the highe... | 05/21/1985 |
| 4516048 | Stator with nonuniformly spaced teeth for rotating electromagnetic device An electromagnetic device of the type having a rotor and a stator with magnetically coacting peripheries, with the stator having toothed pole structures, has the stator pole teeth set at nonuniform spacing to improve the operating characteristics of the d... | 05/07/1985 |
| 4496923 | Electrical device with improved heat dissipation An improved electrical device of the type having a coil and a base and having a thermally conductive electrical insulating material placed between the coil and the base so as to facilitate the flow of heat from the coil to the base, and further having a b... | 01/29/1985 |
| 4477758 | Stepping motor overcurrent detection and protection device An overcurrent detection and protection device for stepping motors has means for detecting an overcurrent condition in the power supply to a stepping motor. Means responsive to the detecting means rapidly provides a signal to the stepping motor drive syst... | 10/16/1984 |
| 4406958 | Stepping motors with disc magnet The rotor in each of the disclosed stepping motors comprises a permanent magnet disc between toothed pole pieces, the diameter of the magnet disc is essentially equal to the outer diameter of the toothed pole pieces.... | 09/27/1983 |
| 4386288 | Stepping motors having detented winding and winding method The disclosed stepping motors have a toothed rotor surrounded by a stator having poles extending toward the rotor, and coils on the poles. At one end of the stator, serial connections between the coils are held at safe positions by detent portions of an a... | 05/31/1983 |
| 4349957 | Method of making a bobbin wound stepping motor A bobbin wound stepping motor has a stator formed of a plurality of stamped metal pieces that are concentrically secured together by projection welding through the use of an arbor except for its rear plate which is positioned concentrically by locating ho... | 09/21/1982 |
| 4319175 | Stabilized stepping-motor system In the disclosed electro-mechanical system of a stepping motor and its control circuit, positive electrical damping is provided for avoiding loss of synchronism and loss of torque over the range of intermediate and high stepping frequencies by imposing a ... | 03/09/1982 |
| 4295083 | Pulsed energy stepping motor power control unit A power control unit causes a high supply voltage to be intermittently chopped to provide energy pulses in a core transformer and the energy in the core is discharged into a capacitor with the capacitor constituting the power source for a stepping motor a... | 10/13/1981 |
| 4274041 | Voltage commanded stepping motor control circuit A stepping motor control circuit that had accepted manual adjustments for setting the stepping rate and direction of rotation of a stepping motor is made to have its stepping rate and direction controlled by the value of an analog command voltage.... | 06/16/1981 |
| 4263547 | Test probe and terminal A test probe for providing a releasable tensioned electrical connection to a selectable part or component of a printed circuit board by either hooking a wire or component lead with the probe end or inserting the probe end into an aperture of a test termin... | 04/21/1981 |
| 4260917 | Interconnection for the windings and lead wires of a motor Lead wires of a motor are stapled to a somewhat rigid, insulating disc to have their stripped ends be at selected points on the disc, the ends of the motor windings are placed in selected slots adjacent the stripped ends and wrapped thereabout and then so... | 04/07/1981 |
| 4220904 | Stabilizing circuit for stepping motors with unipolar self-decay current circuitry The tendency of a unipolar energized stepping motor, having a circuit for enabling the self-decay of winding currents, to oscillate or flutter under some mid-velocity conditions is minimized by reducing the deviation of the motor's rotor from the synchron... | 09/02/1980 |
| 4208623 | Chopping power supply for a bifilar stepping motor A chopping power supply controls power to the bifilar winding phases of a stepping motor with the power being applied to one winding until a selectable value of current flows and is then removed for a fixed duration to have induced current in the other wi... | 06/17/1980 |
| 4186316 | Shaped rotor teeth for stepping motors A diametrical cross-sectional peripheral shape of each of the teeth of a rotor of a stepping motor is made to be more acute than the conventional peripheral arcurate shape that corresponds to an arc having a radius that extends from the axis of the rotor.... | 01/29/1980 |
| 4178539 | Stepping AC line voltage regulator A regulator for providing two different steps of bucking and two different steps of boosting correcting voltages to maintain the value of its output voltage within a selectable range with the regulator effecting each step correction for the next half-cycl... | 12/11/1979 |
| 4164693 | Method and system for producing linear contouring movement A method and system for producing relative movement of an element along two perpendicular axes to closely approximate a desired path with the movement being sub-divided into a plurality of successive lengths with a determination being made of the number o... | 08/14/1979 |
