If you find a patent number or patent date by this manufacturer that is not on this
list, please contact the Site Historian.
Key to Links for Patent Information
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.
|
129,958
|
Jul. 30, 1872
|
Improvement in Registering Steam-Gauges
|
John P. Holt |
Cleveland, Cuyahoga County, OH |
In 1878 the inventor was superintendent of the Cleveland Steam Gauge Co.
Claim:
In reference to the above-said gage I would remark that so much of the mechanism of the gage used for indicating the number of pounds pressure that the boiler is carrying is not new, as it is the same in construction and operation as that described in the patent for steam-gage granted to me 29 October, 1867 (#70,213, hence a full detailed description of that part will not be made, but simply alluded to for a more proper understanding of the improvement attached to it. |
|
280,824
|
Jul. 10, 1883
|
Portable forge
|
John P. Holt |
Cleveland, OH |
See also patent 219,640.
An 1887 ad (see images) from Holt Mfg. Co. features this portable forge. In 1878 the inventor was superintendent of the Cleveland Steam Gauge Co. |