Abstract: A measurement device comprising a curved container containing a liquid, a first indicator that is less dense than the liquid, and a second indicator that is more dense than the liquid, where the liquid substantially fills the container so that the position of the first indicator and/or second indicator in the container relative to the reference indicia may indicate an angle-related property of the device.

Abstract: A measurement device comprising a curved container containing a liquid, a first indicator that is less dense than the liquid, and a second indicator that is more dense than the liquid, where the liquid substantially fills the container so that the position of the first indicator and/or second indicator in the container relative to the reference indicia may indicate an angle-related property of the device.

Abstract: A chuck for a laser cutting/engraving rotary fixture comprises a chuck plate having a chuck plate axis of rotation and at least two mount brackets spaced symmetrically radially with respect to one another about the chuck plate axis of rotation. Each mount bracket comprises an inclined contact surface and each mount bracket is rotatably attached to the chuck plate about the mount bracket axis of rotation. The inclined contact surface can be selectively rotated between a first position with the inclined contact surface inclined toward the mount plate axis of rotation and a second position with the inclined contact surface inclined away from the mount plate axis of rotation. An effectively concave contact surface is defined with each of the inclined contact surfaces in the first position. An effectively convex contact surface is defined with each of the mount brackets in the second position for engaging an inner diameter of a work piece.

Abstract: A chuck for a laser cutting/engraving rotary fixture comprises a chuck plate having a chuck plate axis of rotation and at least two mount brackets spaced symmetrically radially with respect to one another about the chuck plate axis of rotation. Each mount bracket comprises an inclined contact surface and each mount bracket is rotateably attached to the chuck plate about the mount bracket axis of rotation. The inclined contact surface can be selectively rotated between a first position with the inclined contact surface inclined toward the mount plate axis of rotation and a second position with the inclined contact surface inclined away from the mount plate axis of rotation. An effectively concave contact surface is defined with each of the inclined contact surfaces in the first position. An effectively convex contact surface is defined with each of the mount brackets in the second position for engaging an inner diameter of a work piece.

Abstract: There is provided a rotary internal combustion engine (20) comprising a plurality of rotors (21) each having a plurality of lobes (22) for intermeshing with lobes of other rotors to form successive combustion chambers. Axial seal elements (60, 61) are provided at the rotor tips and trailing tips of the rotors respectively. Circumferential axial edge seals (59) are also provided to interconnect the axial seals. The seals engage sealing plates (30) on each axial side of an engine housing (29) so as to effect the combustion chambers. Fuel inlets and ignition means are provided at suitable locations, as are exhaust means.

Abstract: There is provided an internal combustion engine (10) having a housing (11,12,13) and a rotor arrangement (21,22,34) which is mounted for oscillating rotary movement within the housing. The housing provides at least one compression chamber (14) and at least one associated compression chamber (30) and the rotor provides piston means (23, 36) for each chamber. The rotor also has internal passage means for effecting selective communication between the compression and combustion chambers.

Abstract: There is provided a rotary internal combustion engine (20) comprising a plurality of rotors (21) each having a plurality of lobes (22) for intermeshing with lobes of other rotors to form successive combustion chambers. Axial seal elements (60, 61) are provided at the rotor tips and trailing tips of the rotors respectively. Circumferential axial edge seals (59) are also provided to interconnect the axial seals. The seals engage sealing plates (30) on each axial side of an engine housing (29) so as to effect the combustion chambers. Fuel inlets and ignition means are provided at suitable locations, as are exhaust means.

Abstract: There is provided an internal combustion engine (10) having a housing (11,12,13) and a rotor arrangement (21,22,34) which is mounted for oscillating rotary movement within the housing. The housing provides at least one compression chamber (14) and at least one associated compression chamber (30) and the rotor provides piston means (23,26) for each chamber. The rotor also has internal passage means for effecting selective communication between the compression and combustion chambers.