Selectably positionable rotary transducers
OwnerNathan Grundlandinventor
Life of this patent
Estimating the term…
Abstract
A selectably positionable rotary transducer including a first member having at least one permanent magnet associated therewith and a second member arranged for rotational motion relative to the first member in a first plane, the second member defining an odd number of poles and associated apparatus for selectively providing a magnetic force of selected polarities to individual ones of the poles to cause the first member to assume selectable positions with respect to the second member. Numbering apparatus preferably having an odd number of poles is also described.
Claims22
A selectably positionable rotary transducer comprising a movable outer first member having at least one permanent magnet associated therewith and an inner stationary second member, said first member being arranged for rotational motion relative to said second member in a first plane, said second member defining an odd number of poles and a ring member joining said poles at their periphery to define a magnetic closed loop and associated apparatus for selectively providing a magnetic force of selected polarities, to individual ones of said poles to cause said first member to assume selectable positions with respect to said second member, said ring member lying in said first plane, and wherein said first member defines an inner facing circumferential surface and said ring member defines an outer facing circumferential surface, said inner and outer facing circumferential surfaces lying in electromagnetic and mechanical engagement to define an electromagnetic gap between said ring member and said first member and mechanical bearing surfaces for relative rotational mounting therebetween.
Numbering apparatus comprising:
- at least one independently operable rotary printing element, having formed thereon at predetermined positions, predetermined symbols;
- at least one magnet fixedly attached to said at least one printing element for movement together therewith;
- a stator arranged with respect to each printing element and located interiorly thereof so as to permit low friction rotation of said printing element with respect thereto and including a plurality of poles and associated means for selectively providing a magnetic force of selected polarity at said poles in a radial direction and in a selectable combination thereby to cause said printing element to assume selected ones of said predetermined positions for printing of said predetermined symbols in response to energization of at least one of said poles, said stator also including a ring member joining said plurality of poles at their periphery to define a magnetic closed loop, said at least one printing element comprising an outer element coplanar with said ring member and defining an inner facing circumferential surface, said ring member defining an outer facing circumferential surface, said inner and outer facing circumferential surfaces lying in electromagnetic and mechanical engagement to define an electromagnetic gap between said ring member and said printing element and mechanical bearing surfaces for relative rotational mounting therebetween.
Dependencies are inferred from the claim text.