Abstract: An acoustic displacement flowmeter for determining flow rate of a fluid has a fluid flow line defining a flow path for the fluid. The fluid flow line has an inlet and an outlet. A controllable valve is positioned along the fluid flow line for opening and closing the flow path as desired, and an acoustic displacement transducer having a fluid port is coupled to the fluid flow line upstream from the controllable valve. The outlet of the fluid flow line extends through a wall isolating fluid exhausted from the outlet of the fluid flow line from electrical and/or mechanical components residing inside the flowmeter, thereby preventing the exhausted fluid, if explosive, from contacting such electrical and/or mechanical components which may act as potential ignition sources. Preferably, a manifold having a rigid body is provided in which the fluid flow line is formed.

Abstract: An acoustic displacement flowmeter for determining flow rate of a fluid has a fluid flow line defining a flow path for the fluid. The fluid flow line has an inlet and an outlet. A controllable valve is positioned along the fluid flow line for opening and closing the flow path as desired, and an acoustic displacement transducer having a fluid port is coupled to the fluid flow line upstream from the controllable valve. The outlet of the fluid flow line extends through a wall isolating fluid exhausted from the outlet of the fluid flow line from electrical and/or mechanical components residing inside the flowmeter, thereby preventing the exhausted fluid, if explosive, from contacting such electrical and/or mechanical components which may act as potential ignition sources. Preferably, a manifold having a rigid body is provided in which the fluid flow line is formed.

Abstract: Hand-powered and controlled two-wheeled cycle for use of disabled persons having reduced leg functions. The cycle provides a rapid and efficient means of mobility for leg-disabled persons. A preferred embodiment comprises a cycle having a low rider position, hand-powered and controlled front-drive crank and variable gear propulsion means, braking means, and remotely controlled outrigger means.

Abstract: A process is disclosed for the recovery and assay of gold, silver (PMs) and the 6 platinum group elements (PGEs) from playa-evaporite sediments. Fine sediments are subjected to a primary leach with a highly caustic sodium thiosulfate leach liquor to produce a metal-pregnant solution. After filtration the pregnant solution is subjected to a two-stage precipitation of gold, silver and PGE values. In a first stage precious metals and some PGE elements are precipitated by lead acetate or sodium borohydride reagents. The precipitate may be subjected further to desulfurization and metallic footing to produce a lead-precious metal sponge. The sponge is de-leaded by firing and cupelling, selective cementation or electrolysis and reduction to dore is best effected by a carburizing distillation. The final recovery of the metal values is produced by controlled acid parting into individual precious metals and cupellation to the metallic state.

Abstract: In a bicycle frame adapted for internal control cabling, at least one control cable entrance port is located through the wall of the frame at a position ahead of the steering axis, such a port providing a bend-free cable path into and through the interior of the frame. This path passes laterally between the inner wall of the frame and the outer wall of the steering tube of a front wheel fork. A range of applicable port locations permits multiple internal cables to be installed together without interference. The frame configuration and associated cable guidance elements thereby facilitated provide direct cable paths to actuated devices such as a rear brake, front derailleur and rear derailleur. Because such paths are relatively short, incur minimal cable bending, and do not require outer cable within the frame, control actuation is characterized by particularly low levels of friction and elasticity.