Abstract: A walker for assistant people ambulating, particularly on stairs climbing, is a free standing frame comprising a pair of reverse U-shaped frame members that are interconnected by braces at its sides and front, having the walker open on its rear side to allow access by the user. The horizontal parts of the U-shaped members provide handles for gripping the walker. A pair of adjustable front legs are telescopically inserted in the frame and are held in fixed position relative to the frame by a spring lorded pin mounted on the frame passes through the hole on the frame and the front leg. In one embodiment, hand actuated controls mounted on the handles allow the user to pull the pin out of the holes whereby the front legs extend by falling under the force of gravity to the desired length where the pin re-locking the front legs.

Abstract: An inclinometer comprising a housing having transparent front plate and flat bottom, a gravitated rotational protractor having angle graduation printed on the front panel, a pendulum swing needle and protractor rotation locking device. By controlling the locking device, the protractor can be released to rotate freely and can be locked in a position. When the protracted is unlocked, the pendulum swing needle and the gravitated rotational protractor will always rotate to the relatively same position (the needle point to "0" degree angle). Then the locking device can lock the protractor to prevent rotation and the needle continues to rotate to measure the angle to which the inclinometer has been tilted.