Abstract: A spirit level has a hollow profile member as the spirit level body and at least one bubble level with a bubble level holder. The bubble level holder is mounted moveably in the spirit level body, and the bubble level holder has an opening into which a fixing element can be introduced through a wall of the spirit level body. The fixing elements prevents a displacement of the bubble level holder parallel to the longitudinal axis of the spirit level body, and allows a movement of the bubble level holder normal to a measurement surface of the spirit level body.

Abstract: An alignment tool for use in calibrating an optical bench and/or alignment of an optical system such as a collector optical system for EUV and X-ray applications is disclosed. The optical system includes multiple nested mirrors attached to a mechanical support.

Abstract: The present multi-axis installable and adjustable level is permanently installed to a suitable panel on or in a movable structure, such as a recreational vehicle or the like, or a portable work table or the like. The present level enables a user of the structure to level the structure precisely as required, and/or to determine the level of the structure, once the present level has been properly installed. The present level comprises a pair of leaves or panels which are hinged together, with one of the leaves providing coarsely adjustable permanent attachment to the structure and the opposite leaf including a bull's eye type level thereon. The first leaf is secured to a suitable panel (which may be sloped, horizontal, or vertical) of the structure, and the second leaf is extended and locked in a substantially horizontal orientation. The bubble level is then leveled precisely using the infinitesimal adjustment provided.

Abstract: A line producing system includes an input beam of radiant energy that enters a side of a low cost, radiant energy altering device. The radiant energy emerges from the light altering device radiating in a nearly 360 degree disc pattern forming a ring of ever expanding light.

Abstract: A spirit level comprising a hollow rectangular bar of extruded material formed with at least one recess for receiving a bubble tube and having end caps for closing the ends of said bar; together with a sealed capsule, mountable adjacent said recess, containing a bubble tube and adjustment mechanism therefor.

Abstract: An instrument for observing and measuring string segment angles in pianos wherein strings exist in three segments, a speaking string segment, a bridge string segment, and a rear string segment, these three segments creating two angles in the approximate vertical plane, a speaking string segment - bridge string segment angle, and a bridge string segment - rear string segment angle. Subject instrument having the capacity to measure said string segment angles accurately, and directly, without the need for calculations.

Abstract: A wheeled vehicle level has adjustable longitudinal and lateral level indicators, with the lateral level indicator further pivotable in response to a cam ring of a rotatable cap. The cap has numbers to indicate the amount by which a wheel should be raised to level the vehicle. Nestable wheel lifts accompany the level for raising the wheel. A method is shown for using the level in conjunction with the wheel lifts.

Abstract: A vehicle headlamp adjuster has an expandable plate with pads for contacting a roadway surface and then a vehicle headlamp. A level indicator has perpendicular, communicating spirit levels and is rotatable about an axis parallel to the plate, to set one spirit level when the pads contact the surface on which the vehicle rests, so that the other spirit level will indicate horizontal when the plate and pads are rotated 90.degree. and brought to bear on the vehicle headlamps.

Abstract: An improved tilt meter mechanism characterized by a pyramidal pendulum support for a tilt sensor, and means for leveling the support to zero the sensor. A pair of motor driven gibs movable along vertical rails are provided, and a biasing mechanism urges angled faces of the support firmly against the gibs. To zero the tilt sensor, the motors associated with the gibs are individually actuated to move the gibs in directions substantially normal to the X-Y measurement plane of the sensor to bring the X-Y measurement plane into alignment with a gravitationally normal reference plane.

Abstract: Spirit level, whose level element (4) is adjustable relative to the measuring surface (30) by an adjusting device (28) in a locating area (24). The adjusting device (28) has for this purpose at least one set screw (44, 46, 48), whose conical or convex end (42) engages on a conical or convex edge located on a sleeve member (20) surrounding the level element, a supporting member (66, 68, 72, 74) fixed to one end of the level element or to the actual glass body of the level element. A spring member (51, 53) engages on the side of the conical or convex edge (40) facing the contact point with the set screw and serves to limit the magnitude of the adjusting force of the set screw.

Abstract: A slope analyzer is provided for attachment to an earth-working vehicle to provide the operator with a direct readout when a selected slope has been attained during the grading operation. An indicator arm is pivotally mounted on a base and movable to a selected slope ratio indicia. Slopes wherein the uphill side of the vehicle is either on the left or the right may be accurately monitored. A curved spring strip forms a preferred retaining means for the arm and a spirit level provides the desired simple readout for the device.