Abstract: A sliding block with a female die acts in conjunction with a four bar linkage mounted block with a male die to punch indexing holes in a moving metal strip. The block with male die continually seeks to rotate, but is held in position by the sliding block. The sliding block is programmed to periodically move forward at the speed of the moving metal strip and to return to starting position. This frees the male die to rotate to punch out the hole, and to continue to rotate back into the starting position to be held by the returned sliding block.

Abstract: A strip of metal under tension is driven over an anvil wheel where the strip is contoured by a milling cutter. The moving strip is punched to provide an indexing hole. The milling cutter is programed to advance toward or to retract from the anvil wheel based upon the linear travel of the metal strip, and the punch is activated based upon the linear travel of the strip.

Abstract: A pneumatic fail-safe sensor system including a probe adapted to monitor the outline of a master pattern as the directed cutter spindle system of an N/C machine tool forms a part is disclosed. When the probe impinges on the master pattern to indicate that the cutter is deviating from the desired path of travel, a valve is opened and causes a pressure drop that actuates a pressure switch. The valve includes a pressurized dome that presses a valve plate against a valve seat. A valve stem is attached to the valve plate and supports the probe. Movement of the probe disturbs the static pressure of an annular chamber contained wholly within the valve seat area and, thereby, creates the pressure drop that activates the pressure switch. Activation of the pressure switch causes an electronic circuit to energize the control system of the N/C machine tool that terminates its operation by deenergizing the blocking valves.

Abstract: A pneumatic fail-safe sensor system including a probe adapted to monitor the outline of a master pattern as the directed cutter spindle system of an N/C machine tool forms a part is disclosed. When the probe impinges on the master pattern to indicate that the cutter is deviating from the desired path of travel, a valve is opened and causes a pressure drop that actuates a pressure switch. The valve includes a pressurized dome that presses a valve plate against a valve seat. A valve stem is attached to the valve plate and supports the probe. Movement of the probe disturbs the static pressure of an annular chamber contained wholly within the valve seat area and, thereby, creates the pressure drop that activates the pressure switch. Activation of the pressure switch causes an electronic circuit to energize the control system of the N/C machine tool that terminates its operation by deenergizing the blocking valves.