Abstract: A metal detector digging tool apparatus has an elongated pole having a nonmetallic digging tool or scoop attached to one end thereof and a nonmetallic bracket removably clamped between the ends thereof. The nonmetallic bracket clamps to the pole between the ends thereof and has a metal detector clamp extending therefrom that clamps a pinpoint metal detector to said bracket adjacent the nonmetallic digging tool for remotely isolating and examining an object detected by a metal detector without the operator bending or kneeling over.

Abstract: This invention relates to a metal detector digging tool apparatus having an elongated pole having a nonmetallic digging tool or scoop attached to one end thereof and a nonmetallic bracket removably clamped between the ends thereof. The nonmetallic bracket clamps to the pole between the ends thereof and has a metal detector clamp extending therefrom that clamps a pinpoint metal detector to said bracket adjacent the nonmetallic digging tool for remotely isolating and examining an object detected by a metal detector without the operator bending or kneeling over.

Abstract: A spot indicating metal detector apparatus rides on a motorized platform having a rotary framework having a plurality of metal detectors mounted thereon with a plurality of metal detector coils positioned adjacent the ground below. The metal detector apparatus has a plurality of spray heads each associated with one metal detector detector coil for spraying a fluid onto the earth at the position the metal detector detects the presence of a metallic object.

Abstract: A spot indicating metal detector apparatus rides on a motorized platform having a rotary framework having a plurality of metal detectors mounted thereon with a plurality of metal detector coils positioned adjacent the ground below. The metal detector apparatus has a plurality of spray heads each associated with one metal detector detector coil for spraying a fluid onto the earth at the position the metal detector detects the presence of a metallic object.

Abstract: The front panel of a control panel is provided with a recess for receiving a keypad. The recess is larger than the keypad to define a channel between the edges of the keypad and the sides of the recess. A sealant fills the channel to provide a smooth transition between the front panel and the keypad that protects the edges of the keypad and prevents the entry of moisture and debris into the channel. The control panel can be assembled by fixing the keypad within the recess, placing a temporary barrier over the top surface of the channel, and introducing the sealant into the channel. The sealant can be introduced through one or more ports in either the front panel or the temporary barrier. The temporary barrier is removed when the sealant hardens within the channel.

Abstract: The heart rate of a subject during strenuous physical exercise is monitored accurately by feeding the plurality of electric signals of diverse amplitudes generated by transducers engaging the skin of the subject, to a variably controlled gain amplifier to adjust the amplitudes to within a predetermined amplitude range, feeding the adjusted amplitude signals to a slew rate filter formed of a pair of slew rate limiters to compare the slew rates of the adjusted signals, feeding the compared signals to a slew rate limit comparator to separate from the QRS waveforms representing heartbeat of the subject those interfering electric signals having slew rates outside the range of slew rates representing QRS waveforms, and monitoring the QRS waveforms.

Abstract: The service life of a lamp used with a dental handpiece light is enhanced by the brightness control system, which provides a reduced lamp intensity during the time the handpiece is moved from its holder. The control system increases the lamp to its full intensity when the handpiece is actuated.