High-quality black-and-white photographs of large old machines and tools

**marksbug** · Jul 26, 2022, 04:57 PM

my old friend did the braided ropes. possibly both.

**IntheGroove** · Jul 26, 2022, 05:05 PM

The best book of knots is The Ashley Book of Knots. 7000 drawings representing 3900 knots...

**hemmjo** · Jul 26, 2022, 05:05 PM

It is possible we have some confusion in regard to terminology.

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**Rikk** · Jul 27, 2022, 04:30 AM

Originally Posted by hemmjo

It is possible we have some confusion in regard to terminology.

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In my previous post, when I say braid the rope, it was twisted rope, but the only term I could come up with to describe the act of adding a loop to was to braid it, as it's similar to braiding hair.

**Frank S** · Aug 8, 2022, 01:32 PM

The name for the tooth pattern sometimes called a double helical but most often called a Herringbone. As I mentioned in another thread about the ability to transmit more torque with a helical than a straight cut gear the Herringbone design takes that to a far new level not only in the ability of handling increased torque the design does 2 more things it virtually eliminates lateral thrust plus can offer near zero backlash.
Here is a small pair of gear I have made out of aluminum

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Here are a few examples of larger gear sets even right angle

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Due largely to the double angle cut of the gears which in turn alters the stress angle in the body of both gears a higher ratio between pinion and bull can be obtained since there is also more tooth contact and more teeth in contact than a straight cut spur gear

**Jon** · Jul 31, 2022, 12:45 PM

Press. Pittsburgh and Lake Erie Railroad Company. September, 1962.

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**Jon** · Aug 7, 2022, 01:28 PM

Mesta Machine Company double helical gear planer. West Homestead, PA. 1905/1925.

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