Abstract: A toroidal electrical transformer having a low voltage coil, a high voltage coil and an annular magnetic core is disclosed. The preferred low voltage and high voltage coils are each continuous and form an arcuate elongated passage therethrough. The preferred annular magnetic core is wound in place in said arcuate elongated passage substantially from a continuous strip of magnetic material resulting in a toroidal transformer with cotinuous windings and a continuous wound core. Various components and sub-assemblies are also disclosed along with various apparatus and methods for producing such toroidal electrical transformers, its components and its sub-assemblies.

Abstract: A toroidal electrical transformer having a low voltage coil, a high voltage coil and an annular magnetic core is disclosed. The preferred low voltage and high voltage coils are each continuous and form an arcuate elongated passage therethrough. The preferred annular magnetic core is wound in place in said arcuate elongated passage substantially from a continuous strip of magnetic material resulting in a toroidal transformer with continuous windings and a continuous wound core. Various components and sub-assemblies are also disclosed along with various apparatus and methods for producing such toroidal electrical transformers, its components and its sub-assemblies.

Abstract: A toroidal electrical transformer having a low voltage coil, a high voltage coil and an annular magnetic core is disclosed. The preferred low voltage and high voltage coils are each continuous and form an arcuate elongated passage therethrough. The preferred annular magnetic core is wound in place in said arcuate elongated passage substantially from a continuous strip of magnetic material resulting in a toroidal transformer with continuous windings and a continuous wound core. Various components and sub-assemblies are also disclosed along with various apparatus and methods for producing such toroidal electrical transformers, its components and its sub-assemblies.

Abstract: This disclosure relates to a bushing assembly for use with tank-type electrical transformers. The bushing uses a maximum amount of conductor material to provide the required shape and the necessary physical strength, and uses a minimum amount of insulating material to provide only the insulating function. The bushing may be secured to the wall of the transformer tank by an externally mating clamp assembly, or may include threads formed on the inside portion of the bushing for engaging an internally threaded securing member.

Abstract: An improved magnetic core for an electrical transformer, and a method and apparatus for forming the core, are disclosed wherein the corners of core windows are configured to decrease the magnetic path length, thereby reducing the core losses and the amount of material necessary to construct the core. One exemplary embodiment includes a core window opening having an outer corner radii that are larger than the inner corner radii. Alternatively, the core window may have corners of a non-constant radii, with the outer corners having a more gradual or gentle curvature. These and other disclosed embodiments also enhance the ease of assembly of the transformer core and thus decrease or eliminate damage to the magnetic material during assembly.

Abstract: A locking fuel cap arrangement for preventing unauthorized access to the fuel tank of a vehicle. The filler cap is provided with a plurality of ratchet teeth formed on the underside thereof. A spring-biased electrical solenoid operates a pawl that is adapted to engage the ratchet teeth and prevent removal of the filler cap and to disengage the ratchet teeth when the solenoid is energized. A lock-out pin automatically assumes an interference position when the solenoid is energized to prevent re-engagement of the pawl and ratchet teeth after the solenoid is de-energized, thereby permitting removal of the filler cap. Upon subsequent re-installation of the filler cap after removal, the lock-out pin is automatically rotated into a non-interfering position by the clockwise rotation of the filler cap as it is threaded onto the filler neck, thus permitting the pawl to re-engage the ratchet teeth in the filler cap.

Abstract: An improved spring and expander cap assembly and method of attaching such expander caps to the opposite ends of a coil spring is disclosed wherein the expander cap is provided with a plurality of fingers which are deflected over the end coil of a helical coil spring. In a preferred embodiment substantially identical end caps are simultaneously secured to opposite ends of the spring.

Abstract: A connector such as for a manually installable fuse having a stud threadedly engageable with a nut, with mechanism for signalling the installer when the correct threaded engagement has been achieved and for establishing improved electrical conductivity at the connection upon that event.

Abstract: A switch adapted to interrupt high voltage electrical currents by directing an extended curvilinear arc plasma path within a fluid insulating medium. The preferred embodiment of the switch is designed to store rotational energy in a motor spring, release the stored rotational energy, and latch an opposite motor spring all in the same movement of the operator's handle. The switch also includes a mechanical overdrive unit that permits the operator's handle to be rotated only a fraction of the total rotation travelled by the movable contact. In addition, an anti-stick or weld break feature is provided that manually initiates rotation of the movable contact in the event of adhesion between the contacts. Finally, a novel contact design is disclosed which aids in controlling the path of the arc plasma as well as providing multiple contact paths to insure that proper physical connecton is made between the contacts.

Abstract: A bushing well assembly for an electrical apparatus enclosure having a first conductor portion disclosed on a first axis and extending interiorly of the enclosure for connection to the electrical apparatus, at least two other conductor portions disposed on respective second and third axes and extending exteriorly of the electrical apparatus enclosure for connection to respective separable terminators, and an insulating housing for supporting the conductor portions with respect to the enclosure having supporting legs integral thereto to relieve the cantilever forces exerted on the bushing well assembly. The housing is also provided with a recess to retain a gasket and limit the compressive forces exerted thereon.

Abstract: A fuse holder for a transformer comprising a generally tubular housing secured at one end to the transformer end wall and enclosing the fuse. A tapered resilient adapter sleeve is disposed within the outer end of the housing and carries a bushing well for a high voltage line adapter. The adapter sleeve seals the housing interior. An annular clamp secured to the transformer wall holds the adapter sleeve and fuse holder housing in place. The inner end of the air type fuse is connected to the transformer primary winding by a helical coil spring compressed between a projection on the fuse and a stainless steel tube. The fuse and bushing well are removable by detaching a clamp ring on the outside of the transformer and slipping the parts out through the adapter sleeve and housing. The construction permits immersion of the air type fuse and insures isolation and de-energization of the internal transformer parts upon opening of the fuse.

Abstract: A coolant displacement material for a liquid cooled transformer consisting of a plurality of glass spheres having one or more closed voids to provide a specific gravity which is greater than oil so that the glass spheres remain submerged without need for securing devices and is substantially less than the specific gravity of solid glass material so as to not unnecessarily contribute to the weight and consequent shipping cost of the coolant displacement material and the completed transformer assembly. The spheres provide venturi-like flow passages which enhance thermal transfer between the transformer and the coolant by increasing the flow velocity of the coolant to break down surface-effect thermal barriers. The glass spheres are sufficiently small in size to conform to a substantial portion of the space between the transformer and tank.