An excavating apparatus having a rotating cutting head for precision removal of soil, for site preparation prior to construction projects where level grade is required. The powered cutting head is mounted on a longitudinal frame, with travel of the cutting head guided along the length of the frame. Adjustable positioning is provided to maintain position of the cutting head longitudinally along the frame. The frame is pivotally anchored to the ground at one end and is supported by wheels at the o...

An improved very small antenna terminal (VSAT) dual-beam antenna system for use with user subscriber terminals that communicate with low-earth orbiting and other satellites. In one embodiment, the dual-beam antenna system has two offset Gregorian dual-reflector antennas that each has an ellipsoidal subreflector and a rotatable paraboloidal reflector having a focus in common with a focus of the ellipsoidal subreflector. The rotatable paraboloidal reflector couples energy to and from the ellipsoid...

A machine makes blocks from pressed earth. A feed drawer having an open lower end and filled with loose earth is moved laterally across a planar surface into registration over a breech. A press foot is lowered to a level in the breech to receive loose earth from the feed drawer. The press foot is raised to a third level against a bucking foot to compress the loose earth in the breech into a block. Upon moving the feed drawer laterally into registration over the breech, the block will be pushed o...

An adjustable earth boring device for provides a strong, easy to use, adjustable mount for cutters on earth boring devices. In a preferred embodiment, the device includes a grooved, wedge-shaped pocket and matching cutter segment with means to secure the cutter segment in the pocket. The wedge shaped pocket in the boring head is axially aligned with the boring device. Each side of the pocket has deep grooves somewhat resembling bolt threads. A slot in the rear of the pocket receives a bolt to se...

An earth leakage detection device (14) includes a housing (52) and an earth leakage detection circuit (114) mounted within said housing (52) for detecting earth leakage in the electrical distribution circuit. A dielectric test switch (115) is arranged between the electrically conductive strap (18) and the earth leakage detection circuit (114). Pressing the button (84) causes said dielectric test switch (115) to stop the flow of electrical current from said electrically conductive strap (18) to s...

A process for preparing phosphor particles of a host oxide doped with a rare earth or manganese which comprises: preparing an aqueous solution of salts of the host ion and of the dopant ion and a water soluble compound which decomposes under the reaction conditions to convert said salts into hydroxycarbonate, heating the solution so as to cause said compound to decompose, recovering the resulting precipitate and calcining it at a temperature of at least 500.degree. C. Substantially monocrystalli...

The earth drilling and boring system for drilling bore holes in the earth has a drilling rig with a power source attached to a rotateable pipe container. There is a flexible drill pipe or tubing attached to end retained in the pipe container that has an opening through which an end of the drill pipe or tubing having a drill bit attached may be extended and retrieved. A drive mechanism is positioned adjacent to the opening for receipt and movement of the drill pipe or tubing to be used in boring.

An earth working tool assembly of the type including a tool shank terminating in a foot and an earth working tool or point which has a socket for engagement by the shank foot. A bridging member extends between the shank foot and point, the bridging member having a tongue at one end which is received in a channel on the underside of the shank foot and a channel at the other end which receives a rib on the underside of the point. The bridging member transfers a proportion of side loading on the to...

An attachment connectable to a boom member of a machine for performing work functions generally consisting of a handle pivotally connectable to a boom member of the machine, a ground engageable arm member pivotally connected to the handle and an extendable strut assembly interconnecting the handle and arm member consisting of a hydraulic cylinder assembly having a cylinder member pivotally connected to the handle and a rod member pivotally connected to the arm member, and including means interco...

High frequency dielectric ceramic compositions having a dielectric constant (.di-elect cons..sub.r) of 30 to 50, a Q value of 15,000 or more at 1 GHz, and a temperature-dependent factor of resonant frequency (.tau.f) which can be arbitrarily controlled centering around 0 (ppm/.degree. C.) have a main crystal of the perovskite type crystal phase by (1-x)MeTi.sub.a O.sub.1+2a --xLn(Ma.sub.1/2 Mb.sub.1/2).sub.b O.sub.(3+3b)/2, wherein Ln is a rare earth element, Ma is at least one of Mg and Zn, Mb ...