William Prym-Werke Kg

Eilhelm Eiringhaus

Ernst Herten

A riveting press wherein a stationary lower tool is in line with a vertically reciprocable upper tool which is moved up and down in response to rotation of a first cam mounted on the output shaft of an electric motor. The output shaft carries a second cam with an endless cam groove for the follower at the upper end of a first elongated bar which is coupled to the upper portion of a second elongated bar with limited freedom of reciprocatory movement. The lower portion of the second bar carries a pair of grippers which can releasably hold a component of an article of hardware to be affixed to a sheet of textile material between the two tools. A coil spring biases the two bars apart so as to increase the distance between the follower and the grippers and to thereby close an electric switch which is in circuit with the motor. If the grippers encounter an obstruction on their way toward the sheet on or adjacent to the lower tool, the switch opens because the upper bar moves downwardly relative to the lower bar and the motor is arrested. The groove of the second cam has a portion of greater width to allow for movement of the follower in such portion of the groove in the radial direction of the second cam. This enables the press to apply components of articles of hardware to thicker or thinner workpieces.

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Stolberg, Germany

Eilhelm Eiringhaus