摘要:
A hardness tester comprising a tubular element mounted in an upright position, a ball, and a retaining mechanism for the ball. A passage extends from the retaining mechanism through the tubular element and terminates in an opening adapted to be positioned over a surface of a test specimen. The tubular element has a wall through which the passage is visible from the exterior of the tubular element and indicia on the wall. The ball has a lesser cross-sectional area than the passage and a lesser cross-sectional area than the opening.
摘要:
A pair of jaws are pivotally mounted on a common shaft and have springs for biasing the jaws from an open to a closed position. A trigger is pivotally connected to an offset portion of one jaw and has a latch portion adapted to engage an offset portion of the other jaw for holding the jaws in open position. A bait holder is pivotally connected to the jaw shaft and has a portion disposed on each side of the shaft for contact with an extended arm of the trigger.
摘要:
A torque measuring tool in which the twist of a torsion bar indicates the magnitude of applied torque comprising: A. Means to utilize a variety of conventional wrenches of any desired length. B. Interchangeable torsion bars for various torque ranges utilizing one scale with interchangeable numerical displays appropriate to each torque range. C. Means to absorb excess torque, preventing accidental damage to the torsion bars and permitting unilateral readouts. D. Interchangeable readout modes with very simple means of zeroing.
摘要:
A FIREARM COMPRISING A BOLT HAVING AN EXTERNAL CAM AND A BOLT CARRIER HAVING A CAM FOLLOWER DRIVINGLY CONNECTED THERETO FOR COOPERATING WITH THE CAM. THE CAM FOLLOWER IS MOUNTED FOR ROTATION RELATIVE TO THE BOLT CARRIER SO THAT IT CAN ROLL ALONG THE EXTERNAL CAM. THE FIREARM MAY ALSO INCLUDE A PUSH ROD ASSEMBLY INCLUDING A PUSH ROD AND A GUIDE ROD HAVING END PORTIONS MOUNTED IN SLIDABLE, TELESCOPING RELATIONSHIP.
摘要:
A packing element comprising a peripheral sidewall defining an interior space having a central, longitudinal axis; a plurality of holes in the sidewall each having at least two sides, slanted relative to the axis; and a flap extending from at least one of the slanted sides of each of the holes inwardly into the space.