The best book of knots is The Ashley Book of Knots. 7000 drawings representing 3900 knots...
The best book of knots is The Ashley Book of Knots. 7000 drawings representing 3900 knots...
It is possible we have some confusion in regard to terminology.
Attachment 43321
Press. Pittsburgh and Lake Erie Railroad Company. September, 1962.
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Mesta Machine Company double helical gear planer. West Homestead, PA. 1905/1925.
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Note it's secured with planer jacks and screws to a T-slotted base. This monster might have been driven from below! Sensible, open the gap, crane in a blank, close the gap and set to whittle away.
Unsure about the motor endbell visible to the left, certainly connected to shaft holding the gear.
That motor shaft passes behind the gear...
I agree.I always thought they made those in 2 parts. perhaps they are 2 peices.
One piece, the slot in the middle is for run-out of the tools.
Ive seen them in 2 peices ,I presumed for setting back lash when needed to do so.
What appears to be cutter heads, the inclined 'toolposts' is a very precise yet easy adjustment in simultaneous centerline and diameter correction for setup, independent of the 'cross slide'.
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
Attachment 43387
Attachment 43388
Attachment 43389
Here are a few examples of larger gear sets even right angle
Attachment 43390
Attachment 43391
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
You got my vote. I'd like to see that aslo. In my early years I helped set up machines but nothing that big. Cool stuff. Mr Mikey.
10,000 ton forging press at Carnegie Steel Company's Homestead Steel Works. 1893-1895.
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100,000 tons?
I think maybe an extra zero slipped in there!
48-inch mill at the Homestead Steel Works. Homestead, PA. 1954.
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When a supervisors office is on casters, likely he's many processes to oversee.
He knows it's a large plant, when that office also has lifting eyes to hoist by bridge crane.
Of so many pics Jon has presented, this is first I recall depicting duckboards.
Have made a couple over the years, best surface for prolonged standing, and minimizing chips underfoot. Lifted occasionally, chips are right there, ready to scoop and dispose.
But end-grain wood bricks still first choice.
I don't think those are duck boards, more like planks covering a pit.
Most of Mesta's plant was driven from below. Difficult to drive
overhead, when the majority of the product was shifted by
overhead crane.
Ingot casting pits at the Mesta Machine Company. West Homestead, PA. 1910/1920.
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Carnegie Steel Company Homestead Steel Works. Homestead, PA. 1893.
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Billet chutes at the Homestead Steel Works. Homestead, PA. 1908.
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One guy descaling tremendous quantity of iron or steel billets. What leads me to state that?
Only one work coat hanging on the bridge crane upright, off to his left.
Unsure how billets make it from chutes to area between crane span, or how the stacking occurs under crane rail.......
Self-propelled scale car by Howe Scale of Rutland, VT. 1905.
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Being winter, the laundry shouldn't get dusty...
Brown electric hoist unloading ore carrier. Buffalo, NY. 1908.
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72-inch mill rolling plate at the Homestead Steel Works. Homestead, PA. 1941.
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Tank truck with plow clearing snow. Washington, D.C. 1922.
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That thing is sweet. It even has a headlight...
That truck probably works better than some of the plow trucks I see today. :idea:
Mesta four-column forging press. West Homestead, PA. 1905/1925.
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Twenty mule team drawn combine. Walla Walla County, WA. 1941.
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That's an amazing photo
Hey free fertilizer too :lol: very cool pic.
Mesta Machine Company lever shear. West Homestead, PA. 1905/1925.
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If any tool needed eyes painted on it that's it...
Imagine shearing 7" cold steel!
Ralph