US Patent: 255,725 - Hardening metals


	Home\| FAQ	Search:Advanced\|Person\|Company\| Type\|Class	Login


Quick search:	Patent number:	Patent Date:

US Patent: 255,725

Hardening metals

Patentee:

Charles M. Daboll (exact or similar names) - New London, CT

USPTO Classifications:

148/28

Tool Categories:

industrial machines : industrial machine mechanisms : industrial machine pulleys and belt drive mechanisms

Assignees:

None

Manufacturer:

Not known to have been produced

Witnesses:

A. H. Avery

Charles Allison

Patent Dates:
Applied:	Aug. 25, 1881
Granted:	Mar. 28, 1882

Patent Pictures:

USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Jeff Joslin
Vintage Machinery entry for Wilson Mfg. Co. (CT)

Description:

The inventor is known to have worked for I. Wilson of New London, which became Wilson Mfg. Co.

This patent is a companion to patent 255,724 for a roller-bearing pulley for use on ships. This patent provides a recipe for hardening the cast iron components: a bath of 40 gallons water, 50 lb salt, 2 lb saltpeter, 5 lbs potassium cyanide, 5 lb sulphuric acid. The parts are heated first but no hints are provided as to how hot.