Abstract: A blood lancet is disclosed that has a base; a needle mounted to the base; a cap that slides relative to the base, and a locking member located inside between the base and cap. In use, the base and cap are initially at an expanded position and the needle is retracted below a hole in the cap. When the user is ready to draw a blood sample, the user positions a finger on the cap and squeezes the base and cap together. The locking member initially resists the movement of the cap until sufficient force is applied to snap the locking member into the cap, which permits the cap to quickly retract to expose the needle and prick the user's finger. This movement also spreads apart two cantilever springs that bias the cap back toward the initial expanded position. When the user stops squeezing the base and cap together, the springs push the cap and the locking member, which is now engaging the cap, to the expanded position.

Abstract: An in-line arm assembly for releasably clamping a head-mounting fixture in a disk drive tester is disclosed. The in-line arm assembly includes a clamp housing, a movable gib, a removable head-mounting arm, a head-mounting fixture, and a means for moving the gib to activate and release the clamp. The clamp housing has a support surface and an inclined clamping surface. The gib is coupled to the clamp housing and has an inclined clamping surface. The head-mounting arm has a clamped member that engages the clamp with a bottom surface that is parallel to the support surface of the clamp housing and two opposing beveled surfaces that are parallel to the inclined clamping surfaces of the clamp housing and gib. The in-line arm assembly facilitates replacement of heads in the disk drive tester.