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Manufacturers Index - J. T. Plass
Patents
This page contains information on patents issued to this manufacturer.

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USPTO = U.S. Patent Office . Images of the actual patent can be viewed on the U.S. Patent Office web site but a special TIFF viewer must be installed with your browser in order properly work. More information on how to configure your computer to view these patents can be found at TIFF image Viewers for Patent Images.
DATAMP = Directory of American Tool And Machinery Patents . A sister site to VintageMachinery.org with information on patents related to machinery and tools. A much easier user interface than the USPTO's for finding information on machinery patents.

Patent Number Date Title Name City Description
44,819 Oct. 25, 1864 Improvement in machines for crushing ores John T. Plass New York, NY Of interest because the inventor later patented and manufactured an early bandsaw.
88,205 Mar. 23, 1869 Improvement in velocipedes Reuben H. Plass New York, NY Of interest because the inventor later became an early manufacturer of bandsaws.
107,195 Sep. 06, 1870 Improvement in sawing-machine John T. Plass New York, NY "In band-saw machines, as heretofore constructed, the saw has been placed outside of the frame and column which support the driving parts, thereby exposing the saws to injury from handling lumber about them, also rendering them extremely dangerous to the operator, whether from breakage or unsound saw, or by the saw sliding off the upper pulley while in motion, and falling upon the operator, from which many serious accidents have occurred.
"... The invention consists in such a construction of the frame and column of the machine, and arrangement in relation thereto of the upper and lower wheels that carry the saw, as that the saw is made to run upward inside the column, under the top arch of the frame, over the upper or tension pulley, that is boxed in at the sides under inclosure, by a gate, to facilitate change of saws, and down inside the front portion of the frame, and behind the guide-bar, which is made vertically adjustable to any required height from the table to suit different thickness of work; and in provision, as regards safety, the invention includes a flanged construction of such adjustable guide-bar."
177,745 May. 23, 1876 Improvement in gas-governors Reuben H. Plass New York, NY Of interest because the inventor later became an early manufacturer of bandsaws.
570,952 Nov. 10, 1896 Self-propelling vehicle Reuben H. Plass Brooklyn, NY This early automobile was manufactured for less than a year, in 1897. It appears that the inventor and builder got into financial difficulty, being forced into bankruptcy in 1899.