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US 5,024,127 AGranted
Punching mechanism
AssigneeInternational Business Machines Corporation
InventorsWolfgang F. Mueller, George Popp, George B. Vandergheynst
Life of this patent
Estimating the term…
Abstract
A punching mechanism includes a permanent magnet and a pole-piece connected to one pole of the permanent magnet and spaced from the other pole by a gap. A movable coil is disposed at least partially within the gap. A punch actuator is connected to the movable coil, and conductors are provided for conducting an electrical current to the coil. Current is supplied to the coil to effect a punching action.
Claims15
Apparatus for driving a punch comprising:
- a permanent magnet;
- a pole-piece connected to one pole of said permanent magnet and spaced from the other pole of said permanent magnet by a gap;
- a movable coil disposed at least partially within said gap;
- means connected to said movable coil for engaging and actuating said punch;
- and
- means for conducting an electrical current to said coil.
3 more elements
Apparatus comprising:
- a permanent magnet defining a cylindrical first bore;
- a pole-piece disposed concentrically within said permanent magnet attached to one pole of said permanent magnet and spaced from the other pole by a gap, said pole-piece defining a concentric second bore;
- a movable cylindrical coil disposed concentrically with said permanent magnet and said pole-piece and extending at least partially into said gap;
- a pushrod connected to said coil and extending into said second bore;
- and
- means for conducting an electrical current to said coil.
3 more elements
A method comprising the steps of:
- establishing a permanent magnetic field;
- disposing a movable coil at least partially within said magnetic field;
- connecting punch actuating means to said movable coil;
- and
- conducting an electrical current to said coil to control the motion of said punch actuating means.
2 more elements
Dependencies are inferred from the claim text.