Patent GB-191315979-A (GB)
Title: Improvements in Operating and Maintaining Joints for Wind Screens.
Inventor: WILSON WILLIAM JACOB
IPC: B60J1/04
Filed: 1913-07-11
Granted: 1914-07-13
Abstract: 15,979. Wilson, W. J. July 11. Pivot adjustments.- The angular adjustment of a wind - screen is effected by an element secured to or geared with the axle of the screen and to which is given a backward and forward or longitudinal movement by one or more screw - threaded rods or spindles actuated by a rotary operating-handle. In the form shown in Fig. 2, the axle b of the screen rotates in a fixed casing a and has secured thereto a forked crank d, the arms of which are connected by a rotatable pin d<2>. The crank is operated by a screwed spindle e oppositely screwed through a rocking member f in the casing and actuated by a handle g. In the modification shown in Fig. 3, the spindle c rotates in a plain hole in the rocking member f, which is furnished with flats forming bearing-surfaces for springs i acting respectively against a shoulder e' on the spindle, and a ball race h loose on the spindle. The coacting ball race h' is screwed on the spindle and may be turned to adjust the tension of the springs i. The springs take up wear and absorb concussion. In a further modification, an externally screwed spindle is secured to the crankpin d<2> and is screwed into and operated by an internally thteaded, spindle mounted in a rocking member f and provided with springs and a ball bearing as in Fig. 3. In a further construction, the spindle works in a screw-threaded aperture in a rocking member such as f and has a plain part bearing in an aperture in.the crank-pin d<2> and prevented from longitudinal displacement by a nut and washer or other means. One or more concussion-absorbing springs may be arranged on the spindle. In the form shown in Fig. 8, the axle b is turned by a chain j having its ends attached to screwed spindles e<3> simultaneously operated by gearwheels l one of which is operated by a handle g. Springs i are arranged between the wheels and the casing, and to permit of adjustment of the spring tension, one wheel. l is loosely mounted on a sleeve m screwed on the spindle e' and carrying a collar n to which the wheel l is secured by a screw n<1>. By releasing the screw n<1> from the wheel l and turning the sleeve m by a spanner applied to its shaped end n<2>, the wheel l is moved longitudinally without rotating the other spindle. Both wheels l may be screwed directly on the spindles and the apertures in the casing elongated to allow the wheels to be put out of mesh for adjusting the springs, a detachable plate being provided to keep the spindles normally at the right distance apart. To obtain a quicker adjustment, a large gear-wheel may be provided gearing with both wheels l and furnished with an operating handle, the threads on the spindles being of opposite hand, or other arrangements of gears may be employed. In a further modification, the axle b is provided with a pinion with which gears a rack, one end of which is screwed and engages an internally threaded spindle which is rotated by a handle without longitudinal movement. An adjustable spring is provided for keeping the rack and pinion in gear. In any of the constructions described, the screwed spindles may be provided with double threads to obtain a quicker adjustment.