Gealy Wrench and Manufacturing Company
(Greenville, PA?) - Incorporated 11/14/1911 in Grove City, PA by G. M. Gealy, **I. C. Black, A. S. White W. S. Cope. ** Likely "Ira C. Black"
Pipe (chain) wrench Patent #802,187 was awarded on 10/17/1905 to George M. Gealy of Enoch Valley, PA and self assigned.
His second pipe wrench Patent #1,078,426 was awarded on 11/11/1913 and assigned to the company.
On 10/30/1917, Mr. Gealy was awarded Patent #1,244,596 for a reversible ratchet wrench, the patent was self assigned.
Here is an article from the March 16, 1912 edition of Domestic Engineering explaining the operation of the Gealy Wrench.