Abstract: A protective boot of flexible, insulating material for use in covering the grounded portions of a circuit interrupter and thereby preventing accidental shorting between the current carrying sections of the circuit interrupter and the grounded portions. The standard, pole-mounted circuit interrupter consists of a number of movable switches used in high voltage applications where shorting can be extremely damaging to the unit. The protective boot of the invention is fabricated in a number of separate parts which correspond to the individual grounded elements of the interrupter. Thus, when in place, the boot will substantially encase the entire grounded portion providing the requisite insulation. At the same time, due to the number of separate parts of the boot, installation on pole-mounted interrupters is easily accomplished, and at the same time, the moving parts of the switches remain unobstructed.

Abstract: A safety tip for a connector contact of the type having a conductive body surrounding the contact is provided. The tip is made of an insulating material, preferably plastic.

Abstract: A control device having a housing provided with a selector knob and dial arrangement adjacent the knob, the housing also having electrical terminals adjacent the knob and dial arrangement. A substantially flat protective shield is secured to the control device and covers the terminals, the shield having an opening passing therethrough to expose the dial arrangement and have the selector knob telescopically projecting therethrough. The selector knob has a tongue portion thereof overlapping the shield to hold the shield to the control device.

Abstract: An insulated coupling usable with a television tuner shaft or the like for electrically isolating the tuner shaft from the chassis of the television receiver includes a pair of flanged insulating bushings pressed into axially extending chambers formed in the ends of two coupled sections of the tuner shaft. A knurled pin fabricated from hardened steel or other strong material is pressed into the two bushings to hold the two sections of the shaft together with the two flanges of the bushings abutting to form an insulated section between the two coupled sections of the shaft.

Abstract: An interlocking safety arrangement for electrically powered apparatus utilizes a conventional disengagable electrical connector and a standard fuse holder which are physically arranged so that the connector must be disengaged from its receptacle to gain access to the fuse holder. Since the electrical connector supplies power to the apparatus, disengagement disconnects the power and prevents the possibility of an electrical shock hazard from the terminals associated with the fuse.