Patent GB-380786-A (GB)
Title: Machine for the working of the surface of felt hats
IPC: H04M1/03
Filed: 1931-06-11
Abstract: 380,786. Hats. CASSE, M., 3, Rue Victor Hugo, Essonnes, Seine-et-Oise, France. June 11, 1931, No. 17031. Convention date, Dec. 24, 1930. [Class 63.] Pouncing and finishing.-Relates to machines wherein a pouncing or like finishing tool works over the surface of a felt hat on a rotating block, and consists in the provision of positive means for compensating for both the oval section parallel to the base and the hypocycloidal or like section perpendicular to the base so that the operative surface of the tool will remain constantly tangential to the surface of the hat. An oval lathe mechanism is used for the first compensation, and a mechanism based on a geometrical diagram for describing (for example) a hypocycloid for the second compensation, the two mechanisms being suitably geared together. A suitable geometric diagram comprises three parallel axes A, B, C, Fig. 1, A, B being the centres of circles which roll on each other at C, and B carrying a crank E pivoted to a rod slidable through C. A hat pouncing machine comprises an elastic pad 33, Fig. 6, faced with abrasive paper and held in a box at the end of a rod 30 slidable through a ball and socket joint 32 mounted at the top of a housing 35. The rod 30 is journalled on a crank 40 driven by an electromotor 45 rotating with a flywheel 46 providing gyroscopic damping to the movements of the pad. This mechanism is carried by a pivot at right-angles to and adjacent the crank 40 and at the upper end of a post mounted on a member 8, the post being caused to traverse a curve approximating to the vertical section of a hat block 50. To cause this traverse, the member 8 is secured by bolts 9, Fig. 4, to a sliding member 11 housed within a casing 10 and pivoted on a crank 12 on a disc 13 journalled in a plate 16 mounted on a pivot 19, Fig. 6. The member 11 is guided by a block on a spindle 15 secured to the parts 10, 16. The disc 13 is secured to a gear wheel 20 engaging internal teeth formed part way round a fixed member 17, and also an idle gear wheel 21 meshing with a gear wheel 22. The spindle 23 of this wheel is keyed to a member formed with a guide way 24 in which slides a block pivoted to a gear wheel 27 rotating on an eccentric portion of the bearing for the spindle 23. The wheel 27 is driven alternately in opposite directions as hereinafter described. The block 50 is secured on a spindle 51 by spring-pressed balls which engaged the end of a tube 52 secured in the block when the block has been pushed home, a pin 56, Fig. 8, ensuring rotation. The spindle 51 rotates with an internally toothed wheel 57 meshing with a pinion 69 rotating in a bearing eccentric to the wheel 57 and secured to a member 68 fixed to an inclined shaft 70. This shaft is housed in a sleeve 73 and adjustable towards and from the axis of the sleeve, a guide block 71 engaging the shaft and being movable axially of the sleeve by a fork 79 keyed on a vertical shaft 80. The spindle 51 is guided by a pivot 62 secured to the spindle bearing and also to a slide 63, Fig. 9, slidable laterally in the fixed head 60. The sleeve 73 is driven by a worm 82 from an electric motor 86. A gear wheel 88 rotating with the sleeve 73 is arranged to mesh with either a wheel 91, Fig. 10, or a wheel 92, these being mounted on a member 90 pivoted on the axis of a wheel 93, the wheels 91, 92 93 being all in mesh. The member 90 is depressed by a spring or raised by a rod 96 to reverse the direction of rotation of the final wheel, this actuating a worm wheel 110, Fig. 6, on a cam shaft 111. This shaft carries fingers 112, 113, Fig. 13, a cam 115 for oscillating the shaft 80, a cam 117, Fig. 6, for varying the pressure of the pouncing pad on the work and a chain wheel for adjusting a rheostat 134 in accordance with the varied pressure. At the end of the arm 124, Fig. 13, actuated by the cam is a depending arm co-operating with a lever 125, Fig. 6, pivoted to one end of a lever 127, the other end of which engages the support for the pad 33. An adjustable spring 132 provides a yield in this mechanism. The rod 96 is held in its uppermost position by a latch 98, Fig. 11, in the path of the finger 112. This rod is in line with a rod 100 provided with a latch 102 in the path of the finger 113. The rod 100 is pivoted to the control treadle 107, Fig. 6, and carries the operating member 104 of an electric switch in the circuit of the motors and a stop 105 co-operating with the end of the lever 127. In operation, a hat is placed on the block 60 and this positioned on the spindle 51. The treadle 107 is then depressed, raising the rods 100, 96, which are held in their uppermost positions by the latches 98, 102. The motor 45 then causes the pouncing pad to describe a substantially circular path in the plane of the pad while slowly traversing the crown from brim to brim. Simultaneously, the hat is rotated and moved in an oval path so that the part of the hat being operated on remains tangential to the pad. When the tool has made one traverse, from brim to brim, the finger 112 releases the latch 98 and allows the rod 96 to drop to reverse the direction of drive of the cam-shaft 100 and pad traversing mechanism. The pad thus travels over the hat back to its starting position. At this point, the finger 113 releases the latch 102 allowing the rod 100 to descend to break the electric circuit and stop the machine. The stop 105 also moves the lever 127 to tilt the pad away from the hat to allow the work-piece to be changed. The dust resulting from the pouncing is drawn into the casing 35 by an exhauster on the shaft of the motor 45, and caught in a bag.