Whitney Metal Tool Co.
The 2/2/1910 edition of the Chicago Daily Tribute announces the incorporation of the Whitney Metal Tool Company with an inital capital of $20,000. Incorporators are: W W and Elizabeth Stackhouse, and H. B. Andrews.
We are unsure if the reference in this link is to the appropriate company, but will include it just in case.
It appears there are at least 2 companies during the time period bearing this name and in the Chicago area. The company mentioned in the incorporation announcement, and the W A Whitney Company that purportedly emerged out of the W A Whitney Mfg. Co. Research continues.