Abstract: An electrical safety monitor is provided. The electrical safety monitor may include a housing having a face. The electrical safety monitor further includes a plurality of line inputs for hardwiring a plurality of electrical connections. The electrical safety monitor further includes a plurality of test points with each of the test points corresponding to one of the line inputs, each of the plurality of test points accessible at the face of the housing. The electrical safety monitor further includes a line monitoring circuit having a plurality of light indicators and configured to produce light if voltage exists between any two of the line inputs to thereby indicate presence of voltage to a user. The electrical safety monitor further includes illumination areas associated with each of the test points, wherein each of the illumination areas is provided light by one or more of the plurality of light indicators.

Abstract: An electrical safety monitor is provided. The electrical safety monitor may include a housing having a face. The electrical safety monitor further includes a plurality of line inputs for hardwiring a plurality of electrical connections. The electrical safety monitor further includes a plurality of test points with each of the test points corresponding to one of the line inputs, each of the plurality of test points accessible at the face of the housing. The electrical safety monitor further includes a line monitoring circuit having a plurality of light indicators and configured to produce light if voltage exists between any two of the line inputs to thereby indicate presence of voltage to a user. The electrical safety monitor further includes illumination areas associated with each of the test points, wherein each of the illumination areas is provided light by one or more of the plurality of light indicators.

Abstract: An electrical safety monitor for monitoring electrical energy potentials of one or more electrical power input lines of an A.C. circuit. The electrical safety monitor including one or more detector circuits, each including one or more capacitors corresponding to one or more electrical power input lines arranged to charge responsive to an electrical energy potential on the corresponding line and a discharge circuit electrically communicating with the one or more capacitors to cause a capacitor discharge at a predetermined capacitor voltage. A plurality of solid-state light-emitting devices disposed in a human-viewable arrangement, each light emitting device electrically communicating with a selected capacitor and producing a light output responsive to capacitor discharge of the corresponding capacitor. A testing circuit generates a test current through the one or more detectors circuits providing verification of the electrical safety monitor integrity.

Abstract: An electrical safety monitor for monitoring electrical energy potentials of one or more electrical power input lines of an A.C. circuit. The electrical safety monitor including one or more detector circuits, each including one or more capacitors corresponding to one or more electrical power input lines arranged to charge responsive to an electrical energy potential on the corresponding line and a discharge circuit electrically communicating with the one or more capacitors to cause a capacitor discharge at a predetermined capacitor voltage. A plurality of solid-state light-emitting devices disposed in a human-viewable arrangement, each light emitting device electrically communicating with a selected capacitor and producing a light output responsive to capacitor discharge of the corresponding capacitor. A testing circuit generates a test current through the one or more detectors circuits providing verification of the electrical safety monitor integrity.

Abstract: An electrical safety monitor (20) includes a housing (50) with a display face (70) and a securing section (54) that connects with an electrical panel (62). Electrical circuitry (30) is contained in the housing (50). The electrical circuitry (30) communicates with electrical lines (L1, L2, L3, GND) of the panel (62), and defines high impedance electrical paths between pairs of electrical lines (L1, L2, L3, GND). Each high impedance path includes a positive light emitting diode (D1, D2, D3, D4) arranged to draw current from a line carrying a positive electrical energy potential and a negative light emitting diode (D5, D6, D7, D8) arranged to draw current from a line carrying a negative electrical energy potential relative to the positive electrical energy potential. The positive and negative light emitting diodes are disposed on the display face (70) of the housing (50). Each light emitting diode produces light responsive to current flow in a high impedance path that includes the light emitting diode.

Abstract: There is disclosed a multi-phase fuse status indicator having a green "good" and a red "bad" indicator LED for each line fuse of the respective phases, the current to the LED's being pulsed to cause them to provide a blinking indication. Power used for the logic circuit for the LED's and the LED's themselves and the related heat dissipation is less than 10 watts and is supplied from the power lines connected through the fuses regardless of the fuses' condition. Only two simple conductor connections are required from the fuse status indicator to each fused line of the multi-phase power system.

Abstract: There is disclosed a twist drill particularly adapted for drilling plastics and composite materials having a sharp point angle, typically 85.degree. to 95.degree., and a very low lip relief angle, typically 2.degree. to 3.degree.; the relief surfaces are broad, though not unusually so, and may each subtend an angle of 40.degree. to 60.degree. about the drill longitudinal axis. A two-flute drill is shown, but the structure may be modified to provide three or more flutes. Land width, helix angle, and other attributes of the twist drill are generally similar to most common varieties of twist drills for steel, wood, or other uses in drill presses or hand drills.

Abstract: An open-ended ratchet wrench characterized by a handle pivotally carrying a stationary jaw, with a toggle jaw pivotally secured to the latter. The handle includes a cam at the jaw mounting end thereof which presents camming surfaces selectively functional at operative conditions of the wrench. In this regard, one camming surface in combination with the pivotal jaw provides maximum force power during one operative condition, while another cam surface cooperates with the stationary jaw in a stop relationship. A feature of the invention is the ready sliding placement thereof into a workpiece engaging condition, where tightening and untightening of the workpiece is achieved by inverting the wrench 180.degree..