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Typical components of an outdoor playset include: Towers. In a playset, a tower is a vertical structure with one or more decks placed at various levels. A deck is essentially a horizontal play surface contained within or attached to a tower. Bridges. Towers may be connected to one another via fixed bridges or chain bridges for children to walk ...
The stepped reckoner or Leibniz calculator was a mechanical calculator invented by the German mathematician Gottfried Wilhelm Leibniz (started in 1673, when he presented a wooden model to the Royal Society of London [2] and completed in 1694). [1]
They are color-coded by size; in the 1960s-era sets, they were, in order from shortest to longest, orange, peach, blue, red, green, and violet. Each successively longer rod is (with allowances for the size of the spools) the next smaller size times the square root of two; thus any two of the same size will combine with one of the next size up ...
A partially disassembled Curta calculator, showing the digit slides and the stepped drum behind them Curta Type I calculator, top view Curta Type I calculator, bottom view. The Curta is a hand-held mechanical calculator designed by Curt Herzstark. [1] It is known for its extremely compact design: a small cylinder that fits in the palm of the hand.
The Girder and Panel Building Set construction kits enabled a child to build plastic models of mid-twentieth century style buildings. Vertical plastic columns were placed in the holes of a Masonite base board and horizontal girders were then locked into the vertical columns to create the skeletal structure of a model building.
King, an employee at the company, developed wooden toys to use as teaching aids for children in the classroom. In 1935, the Playskool Institute became a division of Thorncraft, Inc., and established offices in Chicago, Illinois. In 1938, Playskool was purchased by the Joseph Lumber Company, where Manuel Fink was placed in charge of operations.
Playsets, or play sets, are themed collections of similar toys designed to work together to enact some action or event. The most common toy playsets involve plastic ...
Whiteprint plan copy. Traditional blueprints became obsolete when less expensive printing methods and digital displays became available. In the early 1940s, cyanotype blueprint began to be supplanted by diazo prints, also known as whiteprints. This technique produces blue lines on a white background. The drawings are also called blue-lines or ...
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