US Patent: 1,574,020
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| Electric-cord protector
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Patentees:
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| Alonzo Galloway Decker (exact or similar names) - Baltimore, MD |
| Samuel Duncan Black (exact or similar names) - Baltimore, MD |
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Patent Dates:
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| Applied: |
May 19, 1923 |
| Granted: |
Feb. 23, 1926 |
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Jeff Joslin
Vintage Machinery entry for Black & Decker Mfg. Co., Ltd.
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Description: |
| The invention is the molded-rubber strain relief for the electrical cord. Previous strain reliefs had been made either from coiled wire or a uniform-cross-section length of rubber hose. Messrs. Black and Decker had the idea of using a rubber strain relief similar to a length of rubber hose, but of decreasing cross-sectional thickness so as to distribute the bending forces over a length of the cord. |
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