Patent GB-1056156-A (GB)
Title: Improvements in or relating to glass cutters
Inventor: INSOLIO THOMAS A
IPC: C03B33/10
Filed: 1964-04-15
Abstract: <PICT:1056156/C1/1> <PICT:1056156/C1/2> <PICT:1056156/C1/3> <PICT:1056156/C1/4> A glass cutter comprises a cutting tool mounted on a holder carried in a frame, together with means for extending the holder downwardly so that the cutting tool may bear on a sheet of glass when relative motion between the sheet and the tool is effected, and means for positioning the holder while extended so that the tool is positioned at a predetermined scoring level prior to its contacting the sheet. A frame 12 movably mounted on a cutter bar 26 carries the scoring means 15.  The means 15 consists of a cutting blade or wheel 14 rotatably mounted on the head 16 of a pillar post 18 (Fig. 10).  The post 18 may be extended downwardly or retracted upwardly by a solenoid 20.  The cutter frame 12 is mounted on the cutter bar 26 by means of rollers 36, 44, 52 and 54, and may thus be positioned at any point along the length of the bar 26.  A motor 80 drives a series of gears 78, 68, which latter gear through a shaft 66 drives a cog 74 in meshing relationship with a toothed rack attached to the bar 26, thus serving to move the frame 12 along the bar.  A screw 88, or a brake means such as a shoe 602, 606 (Fig. 21, not shown) having on the cog 68 and released therefrom by a cam 626 or a brake drum may be used to lock the cutter in position along the cutter bar. The pillar post 18 is non-rotatably positioned within a holder 100 (Fig. 10) by a pin 102, the holder 100 being slidably positioned within a housing 92 of the solenoid 20 and prevented from rotating therein by a pin 104.  A bushing 116 is positioned between the holder 100 and the housing 92, and a sealing ring 118 attached to the top of the holder 100 is also positioned between the holder and the housing.  Between the bushing 116 and ring 118 is a spring 120 normally tending to keep the two apart.  On actuation of the solenoid the pillar post holder 100 is extended downwardly, and the pin 104 slides in guideways 98, the downward extension being opposed by the spring 120 which on deactivation of the solenoid 20 returns holder 100 to its " up " position.  The scoring wheel 14 is thereby lowered or retracted.  The cutting head 14, 16 is mounted upon a carriage 130 carrying two pairs of wheels 136, one pair being positioned in front of cutting wheel 14 and one pair behind.  The wheels are so arranged as always to assume a horizontal contact surface by being connected to support flanges 146, 148 via a pivotal link 156 and a link 158 having elongated slots 160 for the wheel axles.  Thus when the pillar post holder 100 is extended downwardly the cutting head carriage is maintained in a horizontal position. The cutting wheel 14 is maintained at a predetermined distance below the carriage wheels, which distance can be adjusted for various depths of scores.  When a sensing means, such as a photo-electric cell, is employed to detect the leading edge of a glass sheet, a circuit of sufficient voltage is closed to permit the solenoid to extend downwardly to its predetermined position simultaneously activating a time delay means. At the extension, the leading wheels of the carriage 130 are in contact with the glass sheet. When the sheet contacts the cutting wheel 14 the time delay means closes a second circuit of higher voltage than the first causing the solenoid to apply a scoring force to the cutting wheel.  When the sheet has been cut, the wheel does not fall off the sheet edge but is maintained at its same level by the rear wheels of carriage 130.  The sensing means then cause de-activation of the solenoid. Various alternative support means for the cutter carriage are described using Figs. 14, 19, 20 (not shown) The glass sheet may be lightly oiled just prior to the cutting wheel by a wick 139, Fig. 3 (not shown).