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Monday, May 23, 2022

Where DO screws come from?

VIDEO HERE (18:32 minutes)

The first in a series of four videos on screws, though other videos might get mixed in.

0:00 Introduction
0:54 Waterscrews
1:48 Fruit presses
4:08 Worm Drive
5:24 Internal thread cutting
7:19 Dioptra
7:50 Armor screws
8:17 Screws vs bolts
9:01 Armor part II
9:26 Early screw drivers
9:47 Medieval House book
13:01 Löffelholz Kodex
15:22 Ediphone
17:31 Conclusion

9 comments:

  1. Where does a pissed off wife with a shrewd lawyer fit into this list?

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  2. A screw is a ramp or wedge wrapped around a shaft.

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  3. anon 4:04: that's "SCREW", not "SHREW"!

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  4. Fascinating. Thanks so much for including this link.

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  5. From bloated government.... screws come from bloated government. Thus endeth the lesson.

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  6. Screws are one of the foundations of technology and thus civlization. Thus, while I lived in Australia I needed three set of tools, sae, iso and whitworth to work on my truck.

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  7. For about a full decade I made furniture using only draw bored dowels or wedges. No adhesives, no bolts or screws. Nonetheless, I built them to last.

    Even a fine pocket watch can be assembled with pins and dowels - tapered if needed. A punch for disassembly or adjustment.

    Still, the concept of a helix around a shaft has great need, more than simple convenience.

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  8. the local bar after happy hour ?

    ReplyDelete

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