PULSE GENERATOR

• US 3,600,617 A
• Filed: 01/21/1970
• Issued: 08/17/1971
• Est. Priority Date: 01/21/1970
• Status: Expired due to Term

• Current Assignee: Loral Corporation (Newell Brands Inc.)
• Original Assignee: Theodore Frayer
• Inventors: Frayer, Theodore
• Primary Examiner(s): Sliney, D. X.
• Application Number:
  US05/004,552
• Time in Patent Office: 573 Days
• Field of Search: 310/67,40.1,156,162,164,263,66
• US Class Current: 310/156.71
• CPC Class Codes: G01P 3/443 mounted in bearings bearings F16C
• CPC Class Codes: G01P 3/487 delivered by rotating magnets
• CPC Class Codes: H02K 21/125 having an annular armature coil H02K21/14 - H02K21/24 take precedence
• CPC Class Codes: H02K 2201/12 Transversal flux machines

Abstract

An electrical pulse generator comprising a fixed coil with an odd number of sets of pole piece fingers thereon is provided in association with a rotatable magnet having a different odd number of sets of pole piece fingers thereon and extending therefrom for operative association with and rotation by the pole piece fingers extending from the coil for creating pulses therein as a wheel in which the magnet is usually positioned is rotated.

Claims

1. A pulse generator comprising a housing having a longitudinal axis, a fixed coil positioned in said housing, a magnetic core in the bore of said coil, a pair of flat pole pieces one of which is adjacent each side of said coil and an end of said core, said pole pieces each having a plurality of axially extending fingers thereon at the periphery of said coil extending in the same direction and being alternately positioned in uniformly circumferentially space relation, each adjacent pair of such fingers forming a set and an odd number of sets of such fingers being provided, a rotatable member operatively aligned with the axis of said housing, a permanent magnet having a pair of flat faces of opposite polarity carried by said rotatable member, and a flat pole piece positioned against each face of said permanent magnet and each side of said coil, both of said second-named pole pieces having a plurality of axially extending fingers thereon, the fingers of the pair of magnet pole pieces being alternately positioned in uniformly circumferentially spaced relation, each adjacent pair of such fingers forming a set and an odd number of sets of such fingers being provided, a different number of sets of said fingers on the coil pole pieces being provided than on the magnet pole pieces, said fingers on the two different pairs of coil and magnet pole pieces being immediately radially adjacent whereby on rotation of said member a large number of electrical pulses are obtained in said coil per revolution.

2. A pulse generator as in claim 1 where a permanent magnet is used and said housing and member are made from nonmagnetic material.

3. A pulse generator comprising a fixed housing, a fixed coil positioned in said housing, a soft iron core in the bore of said coil, a pair of flat pole pieces one of which abuts on each side of said coil and an end of said core, said pole pieces each having an odd number of axially extending fingers thereon at the periphery of said coil extending in the same direction and being alternately positioned in uniformly circumferentially spaced relation, a rotatable member operatively aligned with the axis of said housing, a permanent magnet having a pair of flat faces of opposite polarity carried by said rotatable member, and a flat pole piece secured to each face of said permanent magnet, each of said last-named pole pieces havIng an odd number of axially extending fingers thereon at the periphery of said magnet extending in the same direction and being alternately positioned in uniformly circumferentially spaced relation, said second-named pole pieces having a different number of said fingers thereon than said first-named pole pieces, said second-named pole pieces being positioned immediately radially adjacent said first-named pole pieces whereby on rotation of said member a large number of electrical pulses are obtained in said coil per revolution.

4. A pulse generator as in claim 3 where at least seven fingers are provided on said first-named pole pieces, and at least five fingers are formed on said second-named pole pieces.

5. In combination with a wheel rotatably mounted on an axle, a transducer comprising a housing secured to said axle, a coil positioned in said housing, a magnetic core in the bore of said coil, a pair of flat pole pieces one of which is adjacent each side of said coil and has a section adjacent an end of said core, said pole pieces each having an odd number of axially extending fingers thereon at the periphery of said coil extending in the same direction and being alternately positioned in uniformly circumferentially spaced relation, a member operatively secured to said wheel and operatively aligned with the axis of said housing, a permanent magnet having a pair of flat faces of opposite polarity carried by said rotatable member, a flat pole piece positioned over each face of said permanent magnet, each of said last-named pole pieces having an odd number of axially extending fingers thereon at the periphery of said magnet extending in the same direction and being alternately positioned in uniformly circumferentially spaced relation, a lesser number of fingers being provided on said second-named pole pieces than on said first-named pole pieces, said second-named pole pieces being positioned immediately radially adjacent said first-named pole pieces whereby on rotation of said wheel a large number of electrical pulses are obtained in said coil per revolution, and leads connecting to said coil to transmit electrical signals therefrom to a remote point to measure wheel rotational speed.