Browse Prior Art Database

Actuator with Linear or Arcuate Motion

IP.com Disclosure Number: IPCOM000050822D
Original Publication Date: 1982-Dec-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 2 page(s) / 50K

Publishing Venue

IBM

Related People

Helinski, EF: AUTHOR

Abstract

A linear actuator uses solid rectangular magnetic pieces molded in plastic to form the armature and stator elements inside a single toroidal winding. An arcuate motion actuator uses sector magnetic pieces for the armature and stator elements.

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Actuator with Linear or Arcuate Motion

A linear actuator uses solid rectangular magnetic pieces molded in plastic to form the armature and stator elements inside a single toroidal winding. An arcuate motion actuator uses sector magnetic pieces for the armature and stator elements.

Fig. 1 is a schematic of the linear actuator comprising rectangular armature pieces 10 which may be held together by a single non-magnetic matrix such as injection molded plastic. Individual rectangular stator pieces 11 are held in spacial relation on both sides of armatures 10. A single coil is wound around all stators 11.

Two magnetic casing pieces 12, located over the coil, provide a magnetic return path for the structure. The second encasement piece (not shown) would be located on the opposite side of the structure.

Fig. 2 shows the top view with stator pieces 11 inside coil 13.

A bobbin 14, which is non-magnetic, supports all stator pieces 11 and coil 13 while providing an inner opening for the armature pieces (not shown).

Fig. 3 shows the side view and Fig. 4 shows the end view of the stator structure of Fig. 2 with both magnetic casing pieces 12 in position.

Fig. 5 shows a print hammer having arcuate motion. The hammer element 15 is supported at pivot pin 16 and has an intermediate curved extension 17 which supports sector or wedge-shaped armature segment pieces 18 in a non- magnetic matrix. Wedge-shaped stator pieces 19 are supported on opposite sides of armature pieces 14 and m...