Patent GB-652115-A (GB)
Title: Improvements in or relating to jigs
Inventor: MAUNDER CLAUDE ALFRED
IPC: B23Q3/00
Filed: 1948-04-19
Abstract: 652,115. Multiple clamps. MASSON, SEELEY, & CO., Ltd. April 19, 1948, No. 10786. [Class 61(ii)] [Also in Group XVI] A jig for supporting a plurality of articles, for instance knives, forks, spoons or hack-saw blades during transfer thereto of an etching resist pigment comprises means for supporting each of the articles at or adjacent to one end thereof, and pairs of fingers so mounted that each pair forms adjustable means for laterally engaging the articles between them at a point spaced from the part engaged by the supporting means. The jig comprises a base plate 1, Fig. 2, to be located on the bed of a press and pivoted thereto a plate 2 carrying a plurality of pairs 5, 6 of pivoted fingers which may be about 3¢ inches long with their pivot points about 1¥ inches apart. The fingers are upwardly turned or stepped at their free ends. Articles such as knives are placed with the ends of the blades in recesses covered with non-slip material in blocks 18, and secured by clips, turnbuckles or the like 20. The blocks may be adjustable forwards and back. The knife blades, such as 19, are each gripped between a pair of fingers which are then locked by means of their pivot screws 17. When used for a pigment-transfer operation, the plate 2 is swung upwards against a stop, a sheet of foil coated with pigment removed to depict the designs is placed in position on the base by means of pegs secured in holes 21 and projecting upwards into holes in the foil, and the plate 2 is swung down. The foil may have guide marks on it. A pressing operation, hot or otherwise, is carried out, and the pigment transferred to the articles acts as a resist in a subsequent etching or like operation. To operate on a further batch of articles, a further section of foil is used. In another form, Fig. 4, one finger 25 of each pair is fixed to the pivoted plate 23, or if adjustably mounted thereon is lockable in a fixed position, while the other finger 24 is pivoted and urged towards the corresponding finger 25 by a spring 28. The fingers 23 are moved to open position in unison by means of a lever 30 rotating an eccentric 29 mounted on a bar 26 and engaging the plate 23. The fingers 24 are pivoted to the bar 26 by pins 27 in elongated slots which allow some independent movement of the fingers to provide for articles of different widths. A fixed or adjustable stop 32 on the plate 23 is in the part of the lever 30 to limit the closing movement of the fingers. For supporting the ends of the articles a plate 33 has recesses containing pads 35 of non-slip material, and spring clips 34, the plate 33 being adjustable laterally or backwards and forwards by means of slots 38, 39 and studs 36. The plate 33<SP>1</SP>, on which the plate 23 is pivoted may be similarly adjustable laterally or backwards and forwards. A plate 40 to support a foil sheet is positioned in a recess in the base and is laterally slidable by means of a slot 42 and stud 41, and a flanged eccentric 43 in an elongated hole 44 and pivoted to the base by a stud 45, on loosening of which it can be rotated by means of a pin 46. A rubber or like strip 48 is located on the plate 40 by means of pins 47 which also locate the plate 40 on the base. In a further form Fig. 9, for use with hacksaw blades and the like, the foil platform 52 is located between a plate 51 having recesses for supporting the ends of the blades and adjustable laterally or backwards and forwards, and a finger assembly 49 similar to that of Fig. 4, but not pivotable away from the base. A cover plate 53 is provided as a support for the blades, and the end elements of the fingers project above the plate 52. The fingers may be straight or curved, and the end elements may be fixed shoulders, studs or the like, or pivotally-mounted shoes or the like. The finger assembly, end supporting means, and foil support may be mounted on a common base plate, on separate base plates, or directly on the bed of the press. Each pair of fingers may be adjustable laterally. According to the Provisional Specification, the supporting blocks 18 may also be angularly adjustable.