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Automatic pellet stack length recording switch

  • US 5,509,039 A
  • Filed: 06/20/1994
  • Issued: 04/16/1996
  • Est. Priority Date: 06/20/1994
  • Status: Expired due to Fees
First Claim
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1. A manual measuring system for measuring a length of a nuclear fuel pellet stack segment along a longitudinal axis thereof, said system comprising:

  • manually movable measuring head means having two legs;

    positioning means for positioning said manually movable measuring head means to at least one position along the longitudinal axis of the pellet stack segment, said manually movable measuring head means providing a compression force for comprising the pellet stack segment;

    measuring means for measuring the length of the pellet stack segment from the position of said manually movable measuring head means;

    compression means for compression by the compression force of said manually movable measuring head means, said compression means having a predetermined compression force;

    probe means cooperating with said compression means for contacting an end of the pellet stack segment and applying the compression force of said manually movable measuring head means to the end of the pellet stack segment, said probe means including slider block means for compressing said compression means and also including a probe member attached to the slider block means for contacting the end pellet stack segment, said compression means and the slider block means being located between the legs of said manually movable measuring head means, the slider block means sliding toward one of the legs of said manually movable measuring head means in response to the compression force of said manually movable measuring head means; and

    sensing means cooperating with said manually movable measuring head means for sensing a position of the slider block means and outputting a signal, representative of the position of the slider block means, for triggering a measurement by said measuring means of the length of the pellet stack segment, whenever the compression force of said manually movable measuring head means is at least equal to the predetermined compression force of said compression means.

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