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Slotted Probe to Achieve Multiple Cycles Per Emitter Tooth

IP.com Disclosure Number: IPCOM000073849D
Original Publication Date: 1971-Feb-01
Included in the Prior Art Database: 2005-Feb-23
Document File: 2 page(s) / 39K

Publishing Venue

IBM

Related People

Goretzki, JA: AUTHOR [+4]

Abstract

In a gear tooth emitter there is a practical upper limit to the number of teeth which may be effectively placed about the periphery of a given size wheel. To produce a satisfactory signal strength, a finite tooth width is required.

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Slotted Probe to Achieve Multiple Cycles Per Emitter Tooth

In a gear tooth emitter there is a practical upper limit to the number of teeth which may be effectively placed about the periphery of a given size wheel. To produce a satisfactory signal strength, a finite tooth width is required.

As shown, a portion of a toothed emitter wheel 2 confronts emitter pickup assembly 3. Assembly 3 includes permanent magnet 4, a core 5 of highly magnetically permeable material and a coil 6 which are encapsulated within the material 7. Emitter wheel 2 has about its periphery a series of uniformly spaced teeth 8. Core 5 presents a series of teeth 9 having the same tooth width as teeth 8, but twice the pitch. As emitter wheel 2 is rotated past pickup assembly 3, two pulses are generated by the passage of each tooth 8 past teeth 9. In like manner, if the pitch of teeth 8 was three times that of teeth 9, the number of pulses generated would be tripled.

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