A Simpler Tape Measure Provides Two Tools in One  

Oleh:

[s.n]

Jenis: Article from Bulletin/Magazine - ilmiah internasional
Dalam koleksi: Machine Design (Soft Copy ada dalam http://search.proquest.com/) vol. 83 no. 6 (Apr. 2011), page 34.
Topik: Measuring Instruments; Design Engineering

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Perpustakaan Pusat (Semanggi) Nomor Panggil: MM44.64 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Smaller, lighter, and less costly than the traditional 16 to 35-ft-long tape measures for outside jobs such as framing buildings, the IndoorTape Measure from R Clark DuBois is for use around the house or shop. Only 3 x 2.5 x 1.4 in, the outer case houses a concave steel tape that is actually two measuring tools in one -- it can work either as a measuring tape or as a 7-ft long ruler. Without a rewind spring pulling on the inside end of the coil, friction lets only short lengths of a few feet be pushed into the coil inside the case. The trick was expanding the coil as more tape is pushed in.

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