Patent GB-1161441-A (GB)
Title: Mechanism for Effecting Rising and Falling Movements of Spindles for Textile Bobbins
IPC: D01H1/36
Filed: 1967-09-05
Abstract: 1,161,441. Automatic reverse gear; clutch control. N. SCHLUMBERGER & CIE. 5 Sept., 1967 [8 Sept., 1966], No. 40569/67. Headings F2D and F2L. [Also in Division D1] A bobbin drive which effects both rotary and vertical movements of the bobbin 1 comprises a unidirectional drive input shaft 56 which can be automatically connected by a clutch to either gears 61, 71 or 62, 72, 73 to drive output shaft 57 in either rotary direction. The rotations of shaft 57 cause the bobbin to either rise or fall. The bobbin is continuously rotated from the main drive 24. The reversal of the drive to the output shaft 57 is caused by rotation of vertical control shaft 87 which is driven by a rocking segmented key clutch 109 of the type which is engaged intermittently and then only for one revolution. As winding of the bobbin progresses the clutch 109 is actuated more frequently and thus the output shaft 57 is rotated in each direction by a decreasing amount and the bobbin 1 is displaced vertically less and less so as to produce a conically ended package. Reversal of output drive shaft 57.-During the intermittent engagement of the clutch and consequent rotation of control-shaft 87, a cam 86 at its lower end urges arm 81 to pivot about its vertical spindle 80, see also Fig. 3 (not shown). The other end of the pivoting arm 81 carries sleeve 63 with dogs 65, 66 which mesh with either gear train 61, 71 or 62, 72, 73. Since sleeve 63 is slidably, but drivably, mounted on input shaft 56, the gear trains will rotate the output shaft 56 on engagement with the dogs 65, 66. The cam followers on the pivoting arm 81 are held against the cam 86 by springs so that the dogs are not forced into engagement with the gears until the teeth are aligned. Clutch operation.-The clutch 109 is actuated when a lead screw 165 (driven alternately in opposite directions from the output shaft 57) causes shoe 161 to abut, then move, detent 145 or 146 and its reduction screw 138 to the right or left, as viewed in Fig. 1. A disc 137 mounted centrally on the screw 138 pushes either on socket 125 or 127 depending on the direction of sideways movement and thereby frees the finger 117 of the rocking segmental clutch key from abutment with a knife 124 or 125 carried on the socket. The inner and outer cages 121, 122 of the clutch are thereby connected together by the segmental key (118) and the shafts 108 and 87 are rotated. A cam 131 mounted on the upper end of the control shaft 87 slides shaft 128 sideways during its rotation so as to align disengaging finger 117 with the other knife 124 or 125 which is carried sideways upon shaft 128. Thereby the clutch disengages after one revolution. The spacing between the detents 145 and 146 is gradually decreased during bobbin winding (so as to actuate the clutch more frequently) by rotating reduction screw 138. This screw has two threads of contrary pitch. The reduction screw 138 is rotated intermittently from shaft 108 (when the clutch is engaged) via shaft 139 upon which the screw is slidably but drivably mounted. The clutch need not be driven from speed controller 3. Spindle speed variation can be obtained during winding by moving belt 22 along the cones 18, 19 using an arm 37 which moves sideways during the intermittent rotation of reduction screw 138. The spindles need not have a common drive with the input shaft 56.