A pipefitter's protractor is used to measure the angle between two separate pipes having an intersecting point. The protractor assembly includes a pipe attachment bar secured to the squared end of one pipe, with a protractor arm extending from the center of the pipe attachment bar and concentric with the centerline of the pipe. The protractor extends from the arm, with the arm and protractor rotating about the pipe attachment bar fitting to align the protractor plate coplanar with the plane defi...

A multiple use level having an elongated body having two flange-like legs which extend at a right angle from one another from the corner apex. An L-shaped bracket is rotatably attached to one of the legs such that it may be freely rotated to any desired angle, then locked in position. The bracket includes a bull's-eye level on a first face thereof and a center line vial level attached to a rotating dial on a second face. A sighting laser may be detachably mounted on the L-shaped bracket. The lev...

Unique transparent polypropylene articles that can be tailored to become opaque when exposed to a sufficiently high temperature and which returns to substantially the same transparency level upon cooling. Such formulations include non-polypropylene polymeric constituents that exhibit refractive index measurements similar to the base clarified polypropylene at lower temperatures, as well as melting temperatures well below that for the base clarified polypropylene. Upon exposure to temperatures in...

The present invention relates to an all-purpose, pneumatic powered signaling device including a first component capable of transmitting signals above water and a second component capable of transmitting a signal beneath the water. The first component includes a pneumatic air horn and the second component a diaphragm and piston. A button actuator is selectively depressed to create a flow passageway from a source of compressed air to the first and second components. A selector switch is selectivel...

A novel archery device which defines the position of the arrow rest so that upon release of the bowstring the arrow is center-shot, i.e., it will fire straight ahead with optimum flight. The device has a visible light source arrow rest adjustment fixture which is temporarily secured to existing site mounting holes on a riser portion of a strung bow and includes an aligning component. The aligning component can move both laterally and pivotally so that a light emission from the fixture can transv...

The invention is a multiple size workpiece positioning device for the precise positioning or centering of workpieces, such as semiconductor wafers, in a processing station. The inventive includes a plurality of ring bars that may be pivoted on one end. The distal end of the ring bars form a circular shape that may decrease or increase in diameter as the ring bars are pivoted. This movement may be used to position or center the workpiece. A single combination pin or two pins of different heights ...

An anchor system for flexible marker posts comprises an anchor that receives a post before the anchor is driven into the ground. In a first embodiment, a flat, rectangular plate of mild steel is folded into a U-shape with parallel upper and lower plates. The lower end of a post is placed within the anchor, and the anchor is driven into the earth with a bladed driver, the anchor bending into a V-shape along an axis defined by the blade of the driver. The anchor retains the post with friction, and...

The present invention is an aerodynamic wind riding antenna ornament comprising a main body adapted to be rotatably and slidably attached to an antenna mast. The main body has an aerodynamic lifting surface to harness airflow from the movement of a vehicle to move the ornament up and down the antenna mast. The main body also has an aperture of sufficient size to allow for the device to freely slide up and down an antenna mast. Retaining means is removably coupled to the aerodynamic lifting surfa...

A device for measuring the length of a linear movement using a rotary potentiometer improves measuring accuracy, measurement deterioration for a long-period usage and miniaturization. The device in includes a regular winding mechanism, forming a single layer of wire, constructed of a screw feeding mechanism stored in a housing to axially move the drum when rotating, and the d m converts a linear displacement into a rotational displacement with the wire. Moreover, the wire on the drum is located ...

A simple light weight bow sight mounting apparatus which has a rigid frame slidably mountable on a bow frame for movement along a first linear path corresponding in direction generally to the archers line of sight. A threaded rod is mounted on the frame for rotation about the longitudinal axis of the rod and carries thereon a slide bock that is moved along a second linear path by rotating the threaded rod. A sight mounting block is mounted on the slide block for rotation about an axis parallel t...