Verdol S.a.

Pierre Frappe

A punching machine for the cards or paper bands used in jacquards, dobbies and the like, comprises horizontal punches individually actuated by pusher means through presser rods which may be selectively brought to an ineffective oblique position. Each presser rod is attached to a needle itself attached by its upper end to a vertical rod. All these vertical rods are alternately raised and permitted to return downwardly so as to reciprocate in front of individual electromagnets which are selectively energized to retain some of the said vertical rods at their raised position. The vertical rods are disposed in successive longitudinal rows and the electromagnets are arranged in corresponding superposed horizontal elongated banks, the vertical rods of each row terminating upwardly short of the next bank of electromagnets in order not to interfere with them. The electromagnets are of the U-shaped type with the poles one above the other at a quite short distance from the rods, in order that each rod may be attracted and retained frictionally by its corresponding electromagnet.

Punching machine for cards or paper bands to be used for the control of

In the automatic reading of a weave design from a pattern including weft rows and warp rows, the advance of the reading assembly (photo-electric cells) from one weft row to the next one is effected by a step-by-step electric motor which receives 'secondary' pulses from a ring counter to which 'primary' pulses are applied, whenever the number of such 'primary' pulses received by said counter is equal to the quotient of the number of 'primary' pulses required to displace said assembly from one extreme weft row to the other one, divided by the number of weft rows minus one unit, this quotient being taken as an integer. The incremental advance of the reading assembly for each step of the motor is much smaller than the centering tolerance of said assembly required to place it in front of each weft row, and the number of 'primary' pulses required to determine such a step is selected much higher so that the error which results from the fact that the quotient is limited to an integer is also negligible.

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Lyon, France

Pierre Frappe