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Punch Actuator Mechanism

IP.com Disclosure Number: IPCOM000074179D
Original Publication Date: 1971-Mar-01
Included in the Prior Art Database: 2005-Feb-23
Document File: 2 page(s) / 70K

Publishing Venue

IBM

Related People

Chapin, FW: AUTHOR [+4]

Abstract

Resiliently mounted ball detents provide a selective punch drive coupling that is inexpensive and reliable.

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Punch Actuator Mechanism

Resiliently mounted ball detents provide a selective punch drive coupling that is inexpensive and reliable.

Shown in A is an oscillating shaft 1 supporting a rocker element 2 thereon for relative movement. Projection 3 on the rocker engages a recess 4 in punch shank 5. Rocker 2 has an opposite projection 6 engageable with a recess in armature 7 of electromagnet 8. On opposite sides of the rocker are drive bails 9 which are secured to shaft 1 for oscillation therewith.

Each drive bail engages the rocker element by means of a resiliently mounted detent ball 10, as seen at B. The ball projects slightly from bail 9 and abuts dog 11 against a slightly chamfered edge 12. A piston 13, with O-ring 14 urges ball 10 toward the rocker element and is enclosed by cover 15. Pressurized air is supplied to chamber 16 to push the piston against the ball. The air pressure is increased for clockwise motion and reduced for counterclockwise movement of the bails 9.

In operation, shaft 1 is cyclically oscillated to cause rocker 2 to also oscillate. However, the rocker can move only when released by energizing electromagnet
8. If the rocker is not released, the resilient mounting permits ball 10 to ride over dog 11 and continue in oscillation. Upon return of the drive bail, air pressure in chamber 16 is reduced and ball 10 rides over bevel 17 on the dog to seat in home position for the next cycle.

When the rocker is released, the force of ball 10 against dog 11...