Traditional plastering trowels from the US and the UK have a common design heritage. Their parts are a rectangle of carbon steel, a stiffening rib, and a wood handle attached to the rib. These simple elements contain a considerable amount of engineering and manufacturing history. The late 19th and early 20th centuries saw many patents issued for plastering trowel handles and for attaching the handle to the blade. Here are 2 examples by Charles Disston of Henry Disston and Sons:
Patent: Improvement in plasterers trowels
Patent: Plasterer's trowel
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Printer's block, reversed, Disston plaster trowel |
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Disston plasterer's trowel patent drawing |
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Plasterer's trowel from the UK |
Plastering, Plain and Decorative: A Practical Treatise (Google Books)
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