Abstract: A monolithic diode pumped solid-state laser (11) comprising as the laser host neodymium-doped yttrium orthovanadate (Nd:YVO.sub.4) (12, 52) or neodymium-doped gadolinium orthovanadate (Nd:GdVO.sub.4) (57, 67) operating on the .sup.4 F.sub.3/2 .fwdarw..sup.4 I.sub.9/2 (.about.914 nm or .about.912 nm respectively) transition, to which a suitable nonlinear optic material (16), such as potassium niobate (KNbO.sub.3) or beta barium borate (BBO), is bonded. The nonlinear crystal gives rise to intracavity frequency doubling to .about.457 or .about.456 nm. The microlaser is a composite cavity formed from a gain medium crystal and a nonlinear frequency doubling material which together have four spaced parallel dielectrically coated faces (14, 17, 18, 15) and which is positioned in close proximity to a diode laser pump source (13) for phase-matched harmonic generation of blue light along an axis of propagation which lies substantially perpendicular to the two faces of the composite cavity.

Abstract: In a cable lock and seal device a roller is rotatable about a single axis normal to the axis of an inextensible member and with respect to a ramp which, in turn, is inclined with respect to the axis of the inextensible member. The roller is moveable up and down the ramp between a retracted position in which the member can be drawn through a passage in which the device and a locking position in which the roller rolls up the ramp to clamp the member against movement in the opposite direction with the member trapped between the roller and the opposite face of the passage. A spring acts on the roller to urge it up the ramp at all times.

Abstract: An image projection system employing microlaser and/or diode laser arrays. Each laser in each array is individually addressable. The system includes three linear laser arrays, one red, one green, and one blue, each individually addressable laser being powered and modulated in accordance with the input image signal. When microlaser arrays, which are energized by laser diode pumps, are used, the laser diode pumps are formed in equivalent arrays. The laser output beams are combined in a dichroic prism and reflected off a rotating multifaceted scanning mirror which effects two dimensional scanning as it rotates. The image beam reflected from the scanner passes through an imaging lens, a speckle eliminator and then onto the projection screen. The invention also includes the method of generating and scanning the image beam, as well as the novel speckle eliminator and the microlaser array configured for optimally close spacing to achieve the desired result.

Abstract: A universal milling and drilling machine provided with a swivel milling head for an automatic reset from horizontal to vertical machining. The driving of the work spindle is carried out by a driving motor via bevel gears and a shift transmission which ensures a high torque even in a low rotation speed range. For optimizing the power transmission between the driving motor and the work spindle, the shift transmission is arranged in the swivel milling head, and the bevel gear transmission is seated directly on the motor shaft of the driving motor. The swivel milling head is mounted on the front surface of a support housing, the front surface being downwardly inclined by 45.degree..

Abstract: A device for positioning a pallet on a work table. The device consists of a vertically movable pallet carrier for transport and for raising and lowering a pallet that is provided with clamping elements on the lower side and at least one clamping device that is provided in the work table. The clamping device can be actuated by vertical movements of the pallet carrier. It has at least one wedge-type valve for clamping a clamping element on the pallet that has been deposited. The clamping device also has at least one control element that can be operated by the pallet carrier for releasing the clamp against the force of the springs, where the control element is mounted directly on one of the wedge-type valves.

Abstract: An acoustic tracking system designed to allow scientists and fishermen to follow dolphins and whales without harming or harassing them. The system utilizes six flow shielded hydrophones mounted on the bottom of a vessel in two arrays of three hydrophones in each array. Acoustic signals of interest (dolphin calls) which strike the hydrophone piezo-electric elements are transmitted to a receiver-display device which determines and displays both the bearing to the signal of interest and the relative range from the vessel to that signal. The receiver-display device utilizes digital microprocessors to determine the difference in signal arrival time of an incoming signal at pairs of hydrophones. The resulting computed bearing to the dolphin call is displayed as a lighted indicator on an electronic heading display.