| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 141 | Methods of assembling and using an adjustable inductor | US14804113 | 2015-07-20 | US09870854B1 | 2018-01-16 | Jesse W. Patterson |
| Embodiments of the invention disclose methods of assembling and using an adjustable inductor to vary inductance. An adjustable inductor, according to embodiments of the invention, includes a wire coil configured to mount on a first side of a conductive plate. The wire coil is conductive and is a plurality of windings. A core has a first portion and a second portion. The first and second portions are configured with a plurality of grooves for threading engagement with the plurality of windings of the wire coil. The threading engagement attaches the core to the plurality of windings of the wire coil. Rotating the core results in varied inductance. | ||||||
| 142 | Adjustable inductor | US14803968 | 2015-07-20 | US09870853B1 | 2018-01-16 | Jesse W. Patterson |
| An adjustable inductor, according to embodiments of the invention, includes a wire coil configured to mount on a first side of a conductive plate. The wire coil is conductive and is a plurality of windings. A core has a first portion and a second portion. The first and second portions are configured with a plurality of grooves for threading engagement with the plurality of windings of the wire coil. The threading engagement attaches the core to the plurality of windings of the wire coil, which results in varied inductance. | ||||||
| 143 | Variable transformer with slidable contactor | US961348 | 1992-10-15 | US5283728A | 1994-02-01 | Edward J. Hobart |
| A voltage control system has a pair of clockwise and counterclockwise interleaved coils on a portion of a transformer core, the coils having multiple spaced turns providing sets of co-planar alternate electrical contact pairs extending linearly to form a tapping system for varying the output voltage of the transformer. A conductive electrical bridging member is movable in the linear direction of extension of the contacts and bridges a selected pair of contacts, one contact from each coil, to alter the effective number of electrical turns of the two coils between a minimum and maximum output voltage. An adjunctive feature is to provide both a contact lead to the bridging member and appropriate rectification at output ends of the pair of coils in order to produce a direct current output. | ||||||
| 144 | Inductance device, particularly for short waves | US787630 | 1991-11-04 | US5175526A | 1992-12-29 | Jean-Marc Martin |
| The invention concerns an inductance device formed on the basis of an asymmetrical line. This inductance device includes a plane conductor, preferably cylindrical, a linear conductor extending along and close to the plane conductor and having one end short-circuited with the plane conductor. Positioning devices make it possible to keep the linear conductor in a determined position in relation to the plane conductor. The inductance device is particularly used for the manufacture of power inductances for short waves. | ||||||
| 145 | Variable transformer | US144146 | 1988-01-15 | US4794359A | 1988-12-27 | Ove Hansen |
| A variable transformer comprising an annular core with a winding which at the end surface of the core is provided with a circular contact path to be connected with a current brush mounted on a rotor (7). The current brush consists of a contact roller journalled on a shaft pin (11) which from the rotor (7) is directed obliquely downwardly towards the end surface of the core and inwardly towards the axis thereof. The contact roller includes a double-curved contact path (17) for punctiform contact with the contact path (18) of the winding. The reactive pressure provided by said contact urges the contact roller upwardly along the shaft pin (11) which where secured to the rotor (7) is provided with a contact plate (14) that is in heat-conducting communication with the rotor (7). The contact plate (14) includes a plane circular surface (15) against which a correspondingly plane, circular surface (15') of the contact roller about the bore (12) thereof abuts. The contact roller is delimited by a conical surface the generatrix of which extends from the periphery of the circular surface (15') to the outer periphery of the contact path (17) of the roller. The rotor (7) is bowl-shaped and its top surface shape corresponds to the internal surface of the upper part of a housing for encasing the transformer. | ||||||
| 146 | Variable transformer with multi-layer coil | US648481 | 1984-09-07 | US4560970A | 1985-12-24 | Richard S. Lenzing |
| 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 provides for easy and economical machine-winding and ensures that the segments of wire forming the commutating surface are held relatively immovable with respect to each other, thus preserving the integrity of the commutating surface. | ||||||
| 147 | Electrical device with improved heat dissipation | US417027 | 1982-09-13 | US4496923A | 1985-01-29 | Richard S. Lenzing |
| 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 base with an extended surface area so as to promote the flow of heat from the base to the surrounding air. In one construction, the insulating material is cast in place, thus cementing the coil and the base together. | ||||||
| 148 | Current amplifying apparatus | US319065 | 1981-11-06 | US4431960A | 1984-02-14 | Oved S. F. Zucker |
| Disclosed is a reversible inductive energy transfer device for use where efficient transfer of energy between inductors is required. The apparatus is a current amplifying device which utilizes an induction coil comprising a plurality of series connected induction elements, the induction coil being connected in series with a current source and a load. The series connected induction elements are progressively connected in series with the induction coil across the load beginning at the end of the induction coil electrically distal from the load and ending at the end of the induction coil electrically nearest the load. Adjacent induction elements are progressively connected to the load in a make-before-break manner. The connection may be made either by a sliding contact which makes electrical contact with electrical taps located along the induction coil by means of superconducting switches or semiconductor switches. The storage inductor may also be superconducting. | ||||||
| 149 | Variable inductor having reduced arcing tendency | US364292 | 1982-04-01 | US4415873A | 1983-11-15 | Jack C. Thornton; Randy G. Russell |
| A variable inductance includes a coil and a moveable contactor which maintains continuous contact with the coil. An electrical connection, which is moveable along with the moveable contactor and away from a first end of the coil, connects the moveable contactor with further contact means positioned remote from the first end of the coil. | ||||||
| 150 | Variable voltage direct current power supply and motor speed control | US122189 | 1980-02-19 | US4330818A | 1982-05-18 | Stanley G. Peschel |
| A continuously variable voltage direct current power supply having first and second output terminals is provided using a variable transformer with a core of magnetically permeable material encircled by at least one electrical winding, with segments of winding turns being exposed along two spaced traverse paths. First and second electrically conductive brushes are simultaneously movable along these respective paths, with at least one brush at all times contacting an exposed segment. Rectifiers connect the first brush to the first output terminal and the second output terminal to said first brush. Rectifiers connect the second brush to the first output terminal and the second output terminal to said second brush. Rectifiers connect a winding terminal to the first output terminal and the second output terminal to said winding terminal. Turn-to-turn short-circuit AC current between the adjoining turns contacted by the brushes is eliminated by employing a transformer winding having a turn-to-turn voltage which is less than the forward turnon voltage through two or more rectifiers. Turn-to-turn current can only flow from one brush to the other through at least two rectifiers plus the resistance of the electrical load. The variable transformer may include both primary and secondary windings or be an autotransformer. Single-phase or multi-phase variable transformers can be used, and advantageous DC power control is effectuated considerably more economically than heretofore, for example, to control the speed of large (multiple Horse Power) DC motors. | ||||||
| 151 | Variable transformer method and apparatus for preventing short-circuit current flow | US890523 | 1978-03-27 | US4189672A | 1980-02-19 | Stanley G. Peschel |
| In a variable transformer, two high-conductivity brushes are mounted in a carriage and adapted for longitudinally traversing the transformer winding to contact exposed segments of the winding. By relatively elevating and exposing the odd and even turns along two different traverse paths, contact with the individual odd and even turns is obtained by the dual brush system without short-circuiting adjoining turns, the brushes being interconnected through an external current-limiting or compensating circuit. Spacings between exposed segments of the winding along these respective traverse paths are filled with dielectric material and are wider than the high-conductivity brushes; thus these brushes can never short circuit adjacent turns. The brushes are positioned so that at all times at least one of them contacts an exposed winding segment. Potential differences between exposed winding segments contacted by respective brushes are offset by the voltage difference compensating circuit, such as a diode circuit, connected between the brushes, whereby no turn-to-turn current can flow, irrespective of the external load conditions being applied to this compensating circuit. The winding or windings are advantageously closely coupled to the magnetically permeable core, thereby minimizing leakage flux and associated leakage reactance. Very large size variable transformers now become feasible by employing this invention. | ||||||
| 152 | Tap changing voltage regulator which eliminates preventive autotransformer | US818987 | 1977-07-25 | US4130789A | 1978-12-19 | Manfred E. Neumann |
| Tap changer voltage regulating apparatus permits a tap changer selector contact to engage an open-circuited new tap without arcing and has a half-tap voltage auxiliary winding which permits halving the voltage being interrupted and doubling the number of steps and also has an auxiliary switch which initially connects the selector contact on the new tap in series with a circulating current-limiting inductor and the load to prevent load circuit interruption and then opens the previous tap circuit so that circulating current is interrupted at reduced voltage and then short circuits the inductor to complete the tap change, whereby the inductor is energized only momentarily. | ||||||
| 153 | Electromagnetic device having a metal oxide varistor core | US3710187D | 1971-09-30 | US3710187A | 1973-01-09 | HARNDEN J |
| Electromagnetic devices such as inductors and autotransformers having improved suppression to sparking or high voltage peaks at the terminals and between coil windings are provided using certain sintered metal oxide insulators having varistor characteristics. The metal oxide can be employed in conjunction with magnetic core material, as a composite core in such electromagnetic devices.
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| 154 | Method of producing a brush track for an adjustable sliding brush transformer | US3623279D | 1969-06-30 | US3623279A | 1971-11-30 | PROXMIRE HARRY J |
| AN ADJUSTABLE SLIDING BRUSH TRANSFORMER WITH A RELIEFPOLISHED BRUSH TRACK. THE BRUSH IS FORMED OF A SERIES OF COMVEX CONTACT SURFACES ON SUCCESSIVELY DISPOSED ADJACENT WIRE TURNS. THE SERIES OF CONVEX CONTACT SURFACES IS UNDERSPANNED BY A SERIES OF CONCAVE SURFACES OF RESIN INSULATING MATERIAL ALONG THE BRUSH TRACK. ELECTRICAL CONTACT BETWEEN THE BRUSH AND THE WINDING IS
ACHIEVED BY SLIDING MOVEMENT OF THE BRUSH ALONG THE CONVEX CONTACT SURFACES. THE CONCAVE-CONVEX BRUSH TRACK IS PRODUCED BY RELIEF POLISHING A PRESELECTED PORTION OF THE WINDING. A POLISHING DISC CONSISTING OF A MAT OF GLASS FIBERS OR FIBERS OF THERMOPLASTIC POLYAMIDE IMPREGNATED WITH SILICON-CARBIDE GIRT MAY BE USED. |
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| 155 | Slide transformer | US3609516D | 1969-08-29 | US3609516A | 1971-09-28 | NAGATOSHI TSUNEO |
| A slide transformer has two taps on each winding of a coil wound around the magnetic path of an iron core. The taps are connected to contacts respectively and a brush is slideable across these contacts. In a transformer with a shell-type iron core, one of these taps comes out of the upper side of the iron core, the other comes out of the lower side. In a transformer with a coretype iron core, one of the taps is connected to a contact through a hole provided in the magnetic path of the iron core, and the other is connected directly to the other contact.
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| 156 | Low weight/rating ratio,continuously variable low impedance transformer assembly | US3489973D | 1966-03-31 | US3489973A | 1970-01-13 | GIBSON WILLIAM W |
| 157 | Adjustable sliding brush transformer | US3466583D | 1968-09-18 | US3466583A | 1969-09-09 | KROL RONALD A |
| 158 | Slide transformers and slide reactor devices | US3461379D | 1967-09-01 | US3461379A | 1969-08-12 | OKITA HIDEKI |
| 159 | Regulator device for induction apparatus employing addition and subtraction of coil turns | US65390267 | 1967-07-17 | US3419833A | 1968-12-31 | ALPHONSE VIGREUX ARMAND |
| 160 | Autotransformer | US51484265 | 1965-12-20 | US3365685A | 1968-01-23 | VAUGHAN CARROLL B |
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