1926 black and decker drill price8/17/2023 ![]() This is the Black & Decker "Shorty" drill. The same label gives "The Van Dorn Electric Tool Co. Perhaps Marschke Manufacturing was acquired by B&D.Īn example is seen labeled as a "Van Dorn No. is identified as being from Towson, Maryland, which was (and is) the hometown of Black & Decker. Decker was still with the company, so why did he assign an invention to someone else? A possible clue is in patent 1,911,857, where Marschke Manufacturing Co. This patent is notable because the inventor is the co-founder of Black & Decker, which at the time of the patent was already quite successful. The improvements are to extend the service life of the cord, and ease replacement of the cord when necessary. Improved means of electrically connecting the cord to the drill. "The object of the present invention is to product a tool which can be used as a combined screw driver or socket wrench and drill." The innovation is a clutch that can be disabled when the tool is used as a drill.Įlectrical connection for portable electric tools Portable power-driven rotary tool with spindle latch and hand-operated chuck 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. Previous strain reliefs had been made either from coiled wire or a uniform-cross-section length of rubber hose. The invention is the molded-rubber strain relief for the electrical cord. It is likely that the original work was done for the first, Baltimore-based, incarnation of Black & Decker, which appears to have encountered financial difficulties and been reborn a couple of years later as a Towson-based business.Īn improvement to patent 1,245,860 the improvement is to the on-off switch to address a problem with unequal contact force in a pair of contacts. ![]() The patent is assigned, by mesne assignments, to the Maryland Trust Co. Of interest because it is an early patent to Mr. The primary innovation covered by the patent is to place an on-off trigger switch in the handle of the drill.ĭesign for a housing for electric air compressors and motors This important patent marks the beginning of the modern era of the handheld electric drill: it is the first pistol-grip drill with a trigger switch. Another object of the invention is to utilize an element of this disk drive as a fan for creating an air draft to cool the motor." "The primary object of this invention is the provision in a portable drill of a variable speed disk drive between the power motor of the drill and the chuck spindle or such other member as drives the drill directly. USPTO's for finding information on machinery patents. On patents related to machinery and tools. More information on how to configure your computer to view these patents can be Patent Office web site butĪ special TIFF viewer must be installed with your browser in order properly work. Images of the actual patent can be viewed on the U.S. ![]()
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