Abstract: An electrical fuse for mounting on a circuit board. The fuse has a housing member with terminal members engaging a fuse element intended to interrupt an external electrical circuit coupled with the terminal members upon an occurence of a fault condition in the electrical circuit. The housing member has internal arc-suppressant structure supporting and deflecting the fuse element to shield the terminal members from arcs occurring upon a failure of the fuse element in response to the fault condition.

Abstract: A thermostatic switch is shown in which a movable arm mounting a movable contact and a snap acting thermostatic strip disc are cantilever mounted with the disc adapted to cause the movable contact to move out of engagement with a stationary contact at a selected calibration temperature by engaging the movable arm and moving it and concomitantly the movable contact away from the stationary contact when the disc snaps to its opposite surface configuration.

Abstract: The disclosed full-range fuse provides excellent short-circuit and overload protection using various forms of fuse links, made of copper or copper alloys, or silver, including curtain fuse links, the short-circuit performance being enhanced by solidifying the sand or other granular fill with a binder, notably a silicate or boric acid, the overload interruption being enhanced by boric acid that is distributed throughout the fill.

Abstract: A resettable circuit interrupter in a ground fault detector circuit utilizes a housing which slideably retains a solenoid coil wound on a bobbin. A contact carrier is attached to the bobbin and one or more moveable contacts are provided on the carrier opposite a corresponding set of fixed contacts. A plunger slides through a central passageway in the solenoid coil. The bobbin is spring biased so that the contacts are in a normally open position. In a manually resettable version, when the solenoid coil conducts a predetermined current, manually activating the plunger causes the plunger to magnetically couple to a footplate attached to the bobbin. When a plunger spring returns the plunger to its original position, the bobbin and contact carrier move with it and the contacts are closed. When the solenoid coil conducts insufficient current to magnetically couple the plunger and footplate, the bias springs maintain the contacts in the normally open position.

Abstract: An improved electrical fuse having axial leads (5) and comprising a fuse wire in a cylindrical sleeve (2) supported at its ends by lead carrying end caps (3) is coated over the length of the fuse body by an insulating layer of thermo-plastic (7). Improved humidity resistance and mechanical strength are achieved and control of coating thickness is improved. Use of hot plastic for the insulating layer (7) reflows solder joint (4) reducing instances of open or high resistance fuses which must be rejected. Also, the I.sup.2 t performance is significantly improved over other adherent coatings.

Abstract: A laminated contact assembly is formed from a number of individual contact assemblies. Each individual contact assembly includes a contact arm portion, which carries a movable main or arcing contact and a stationary conductor portion. A flexible shunt is used to connect the contact arm portion to the stationary conductor portion. Intermediate individual contact assemblies are provided with T-shaped slots for receiving square-headed fasteners. These square-headed fasteners are captured by adjacent assemblies once the laminated contact assembly is complete. By providing such an arrangement, the need to drill and tap holes in the base of the laminated contact arm assembly is obviated. Since all of the individual contact arm assemblies are fastened together, the possibility of the square-headed fasteners disposed in T-shaped slots in intermediate individual contact arm assemblies is greatly reduced.

Abstract: A molded case circuit breaker is provided with rubber stop assemblies disposed between the contact assemblies adjacent the outside poles and the cover portion of the housing. The rubber stop assemblies are disposed such that they prevent the contact assemblies from damaging the cover. The stop assemblies include a dual purpose U-shaped bracket having two parallel sets of arms. One set of arms is provided with aligned apertures at the free ends for receiving a pin which defines a pivot point for the crossbar assembly. The other set of arms is also provided with aligned apertures at the free end for receiving a metal pin for carrying a cylindrical shock absorber assembly. The shock absorber assembly is mounted adjacent outside poles above the contact carrier but spaced away from the inside of the cover of the circuit breaker. Thus, when the contact arm is opened, it will stop against the shock absorber and not damage the circuit breaker cover.

Abstract: A one piece member rests against a cam surface at a first end and against an adjustable pivot at a second end, biased thereagainst by an integral cantilever spring of said member, the distal end of which is interlocked in a deflected position to a hook formed in a housing. One end of a bimetal strip is riveted to the second end of the one piece member, the position of the other end of the bimetal strip being determined by manual adjustment of the pivot and the cam.

Abstract: A narrow gap arc welding process comprises steps of defining a narrow gap between a pair of members to be welded arranged so as to face each other at a predetermined distance, feeding a consumable electrode into a guide cylinder which is movable along the narrow gap, and generating electric arc between the tip of the consumable electrode and the members to be welded to unite them with each other, wherein the consumable electrode, while being deformed plastically to have a wave-like pattern with a pitch of about 10 to 30 mm and a molding width of about 2 to 5 mm depending on welding conditions, is fed into the narrow gap with the direction of the molding width being in line with the direction of the width of the narrow gap and the direction of the tip of the consumable electrode being changed so as to point out one after the other facing edge of the members to be welded alternately at a high frequency. Also, an apparatus for practicing the process is described.

Abstract: A molded case circuit breaker is provided with a quick change current transformer assembly. The current transformer is used to sense overcurrent conditions and apply a signal to an electronic trip unit to trip the circuit breaker. The quick change assembly includes an insulated removable plate located adjacent an open cavity in the housing in which the current transformer is located. The current transformer is donut-type disposed about a load-side conductor located in a cavity in the housing rigidly fastened to the circuit breaker frame. In order to replace a current transformer, the insulated back-plate is removed. Next the load-side conductor is unfastened and removed from the circuit breaker housing. The current transformer is then removed from the circuit breaker housing. In order to install a new current transformer, the steps are reversed.

Abstract: A variable orientation ink catcher for use with ink jet printing equipment receives unused ink drops. The drops are returned to the printing system for reuse. The catcher includes an arcuate receiving portion offset from an outlet port. Caught ink flows by gravity from the receiving portion via a reservoir to the outlet port through a wide range of angular orientations.

Abstract: An electromagnetic relay with an operation indicating member comprises a housing including a base and a case having a window, a switching unit including an electromagnet, terminals disposed on the base, contacts fixed to the terminals, and an operation indicating member. Terminals and contacts are heated by arc discharge during switching action of the relay and by current flowing through the terminals. The indicating member is, however, not heated because the indicating member is disposed at a location away from the heated components. The indicating member is thus prevented from being deformed by the heat generated from the contacts. Consequently, the indicating member can invariably be seen through a window in the case.

Abstract: A dual element cylindrical line fuse includes an insulating assembly disposed midway along an insulating tube. A metal eyelet having a barrel with a closed end is disposed through the assembly and retains an electrically conductive coil in place around the insulator assembly. A pair of heater strips extend between the ends of the coil and conductive end caps disposed on the ends of the tube.

Abstract: A modular option deck is disposed adjacent the trip bar of the circuit breaker to facilitate the addition of circuit breaker options, such as an undervoltage trip device and shunt trip device to the circuit breaker. The option deck includes an aperture disposed adjacent the trip bar to allow the actuating lever or plunger from the option device to communicate with the trip bar. The option devices are mounted on brackets having diametrically opposite downwardly extending L-shaped depending arms, adapted to be received in any one of a plurality of sets of slots provided on the deck. The brackets are quickly and easily slid into the slots on the bracket and secured in place.

Abstract: A cam roll pin assembly includes a cylindrical portion having an extending axle at each end for receiving a small roller and a relatively larger roller. The smaller roller is provided for engaging the cam surface on the contact assembly. The larger roller is received within a slot. Retaining rings are used to secure rollers on the axles. With such an arrangement the rollers are able to rotate independently. Thus, during a blow open condition, the contact points of the cam roll pin assembly can rotate in opposite directions without causing relatively large frictional forces on the cam roll pin which can slow down the blow open speed.

Abstract: The invention relates to an image forming apparatus comprising a belt-shaped member for feeding a sheet, at least one image forming means arranged in confronting relation to the belt-shaped member, a separation means for carrying out the separation between the belt-shaped member and the image forming means by shifting at least one of the belt-shaped member and image forming means, a drive means for driving the belt-shaped member, a cleaning means for cleaning the belt-shaped member, a signal generating means for emitting a signal, and a control means for separating the belt-shaped member from the image forming means by controlling the separation means and for then rotating the belt-shaped member at a predetermined speed during the image formation by controlling the drive means.

Abstract: A thermal sensor assembly is shown as having a housing formed of first and second body sections with the first being a probe-like portion for introduction into a medium the temperature of which is to be monitored; a thermistor and an electrical switch are electrically isolated from each other and situated within the housing; the thermistor is in series with and between one of the body sections and a terminal which is connectable to associated circuitry external of the sensor assembly; the electrical switch is effective to close an electrical circuit as between the same one of the body sections and a second terminal which is connectable to additional associated circuitry external of the sensor assembly.

Abstract: A recording medium having a substrate and an ink-receiving layer provided on said substrate, wherein said ink-receiving layer contains, in combination, solvent-soluble resin (A) that is capable of absorbing water in an amount of 0.5 times or more as much as its own weight and is substantially water-insoluble, and particles of solvent-insoluble resin (B) that is capable of absorbing water in an amount of 50 times or more as much as its own weight.

Abstract: An image recording apparatus for recording an image on a recording medium by employing a transfer recording medium having a transfer recording layer whose transfer characteristics change upon application of heat energy and light energy thereto comprises: a recording section including a thermal head for applying heat energy to the transfer recording medium disposed along a conveying route of the transfer recording medium and a light source for applying light energy to the transfer recording medium; a transfer section for transferring onto the recording medium an image formed on the transfer recording medium in the recording section; and a device disposed upstream of the transfer section in the advancing direction of the transfer recording medium and adapted to make portions of the transfer recording layer other than an image-forming area non-transferrable.

Abstract: A subminiature fuse is disclosed comprising two terminals, a substrate, a fusible conductor, and a unitary housing. The unitary housing is sealed and provides increased mechanical strength, thus reducing the risk of a catastrophic failure of the fuse. The upper portion of the fuse terminals are shaped into finger like projections adaptable to mechanically fastening the fusible conductor and the substrate thereto thus facilitating the manufacturing process. In one embodiment the fusible conductor and adjacent portions of the terminals and substrate are coated with a ceramic coating or adhesive. The housing is sealed by utrasonic welding or preferably in an insert molded plastic enclosure which is substantially devoid of air.