GB146585A - Improvements in or relating to sliding calliper and vernier calliper rules - Google Patents

Abstract

146,585. Sutton, J., and Sutton, G. J., (trading as Stuart & Moore). April 4, 1919. Beam - compasses; anglemeasuring appliances.-Sliding calliper and vernier calliper gauges are provided with attachments to the jaws whereby the gauge may be used vertically as a height scribing gauge upon a surface plate or as a depth gauge, beam compasses, callipers adapted for special conditions, and as an angle-measuring and a combination tool generally. Fig. 1 shows the bar 1 of the gauge fitted with a foot member 2 clamped to the stationary jaw 3, the movable jaw 5, provided with a customary fine-adjustment 5<1> carrying a scribing-member 7 with pointed and bent ends. In Fig. 2 the gauge is shown arranged for measuring the depth of holes, for which purpose a block 11, acting as the upper gauging face, is clamped to the rear end of the bar, and the movable rod 17 which is to pass into the hole is secured to the movable jaw 5 of the gauge and slides freely through a hole in the end block. Marking-points, for attachment to the fixed and movable jaws when it is required to adapt the gauge to serve as beam-compasses, trammels, or as a marking-off tool, may be inwardly and outwardly curved, or may be straight as shown in Fig. 3, where the points or rods 24, 25 are carried by pins 20, 21 clamped by screws 26, 27 to the jaws. In a modification, studs with conical ends for use as centre punches &c. may be passed through the same holes. For measuring angles and gauging dimensions of angular parts a disk or plate may be attached to one or both jaws and set by means of graduations, and may be provided with plates, ribs, studs, or projections for gauging the angle of any piece or measuring distances between angular and tapered surfaces. There may be a spirit level with an adjustable levelling screw for obtaining a horizontal base from which to measure any angular direction. Suitably-shaped plates may be attached one to each jaw so that the rule can be used for measuring diameters of cylindrical bodies beyond the scale and similarly plates may be affixed of a profile adapted to measuring dimensions of bodies of irregular profile, e.g. for depth, diameter, and pitch of screw-threads.