US Patent: 4,550,507
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| Thread Construction in Length Measuring Instrument and Method for Manufacturing Thread construction
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Patentee:
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| Goro Nishikata (exact or similar names) - Kawasaki, Japan |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Nov. 22, 1983 |
| Granted: |
Nov. 05, 1985 |
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Joel Havens
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Description: |
| Flynn, Thiel, Boutell & Tanis - patent attorneys
Abstract
A thread construction of a length measuring instrument wherein a spindle is provided by forming out of a ceramic material an externally threaded portion on the outer peripheral surface thereof. A plurality of externally threaded pieces are cut from an externally threaded member made of a material identical with and having a pitch equal to the externally threaded portion of the spindle and fixedly secured to the inner peripheral surface of a sleeve opposed to the externally threaded portion to thereby make the spindle be of a screw feed type, and the manufacturing method therefor.
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