Patent GB-585572-A (GB)
Title: Improvements in or relating to linear-dimension gauging devices
IPC: G01B5/207
Filed: 1943-07-03
Abstract: 585,572. Linear - dimension gauges. SHEFFIELD CORPORATION. July 3, 1943, No. 10833. Convention date, July 3, 1942. [Class 106 (ii)] Linear-dimension gauging apparatus comprises a finger arranged to contact two adjacent surfaces of the workpiece at right angles to each other, the finger being mounted for independent movement in two mutually perpendicular directions ; movements of the finger in one direction operating one gauging device and movements in the other direction operating another gauging device. The workpiece, e.g. a shell, is placed on a table 13, Fig. 2, after the table has been moved to the left to workloading position by operating a handle 19 on a shaft 21 having a segment 22 geared to a shaft 24 carrying an arm 25 connected by a toggle link 26 to a carriage supporting the table. The loading and gauging positions of the carriage are determined by adjustable stops 31, 34 contacting the segment 22. When the shell is placed on the table 13 and before the latter is moved to gauging position, the depth of a recess 42, Fig. 9, of the shell is gauged by a feeler 41, Fig. 8, carried by a lever 43 attached to the table 13 by spring ligaments 44, 45 and operating a gauging head 38 of the kind described in Specification 551,956. The diameter of the recess 42 in the shell is gauged by two fingers 55, 57 connected to a gauging head 51 mounted on the table 13. The table 13 carries a fixed plug 60 forming a " go " gauge both for an aperture 63 in the base of the shell and also for the internal diameter of a threaded portion 64. A raised part 65 of the table acts as a " go gauge for a groove in the base of the shell. If the dimensions gauged by the plug 60 and raised part 65 are not below size, the shell will seat properly on the table 13 so that a groove 67 in the shell will clear a fixed arm (not seen in Figs. 8, 9), as the table 13 is moved to gauging position. Otherwise, the arm will obstruct movement of the shell. When in gauging position, the height of the shell is gauged by a head 74, Fig. 2, the plunger 75 of which is operated by a lever 76 having a cam surface 82 engaged by the top of the shell. The diameter of the shell above the groove 67 is gauged by two fingers 85, 86 controlling a gauging head fixed to the frame of the apparatus in the manner described in Specification 551,956. The diameter of the shell base is gauged by fingers 93, 94 controlling a gauging head 95, Fig. 3, operated by a plunger 96 bearing on a block 97 connected by spring ligaments 98 to a box 99 itself connected by spring ligaments 101 to the frame 10. The finger 94 is carried by the block 97 and the finger 93 and head 95 by'the bar 99. The diameter and also the axial position of the groove 67 is gauged by fingers 103, 104, Fig. 9, the former being carried on a block 108, Fig. 3, connected by spring ligaments 109 to a bar 105, carrying the other finger 104 and the gauging head 106. The head is operated by a plunger 107 contacting the block 108 and the bar 105 is mounted on a carrier 112 by spring ligaments 110. The fingers 103, 104 move vertically to gauge the axial position of the shell groove 67. To this end the carrier 112 is supported for vertical movement by spring ligaments 114 connecting the carrier to the base 10, the'vertical position being gauged by a head 120, Fig. 2. The weight of the gauging head 106, Fig. 3, and associated parts is counterbalanced by a spring acting vertically upwards: The gauging heads control electric circuits as described in Specification 551,956, each circuit having lamps to show whether the dimension gauged is over or under size. If all the dimensions are correct, a lamp 130, Fig. 2, is lit.