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GB Patent: GB-189,352
Improvements in jigs for facilitating drilling operations
Patentee:
William Alfred Pearn (exact or similar names) - Rusholme, Manchester, England

USPTO Classifications:

Tool Categories:
metalworking machines : drilling and boring

Assignees:
Frank Pearn & Co., Ltd. - West Gorton, Manchester, England

Manufacturer:
Frank Pearn & Co., Ltd. - West Gorton, Manchester, England

Witnesses:
Unknown

Patent Dates:
Applied: Dec. 03, 1921
Granted: Nov. 30, 1922

Patent Pictures:
Espacenet patent
Report data errors or omissions to steward Jeff Joslin
"Vintage Machinery" entry for Frank Pearn & Co., Ltd.
Description:
"Jigs for drilling comprise a base plate d pivotally secured by a bolt to the machine table and T-slotted for clamping the work a between brackets b, c. Templets f are secured between the work and the brackets which may be spigoted to engage the work and permit axial rotation to bring parts such as j into position for drilling. The brackets have openings to permit all the holes to be drilled at the one setting, and in the example shown the brackets are connected by a tie bolt passing through the cylinder to be drilled. In other examples the jigs are described as set up for drilling pump barrels and valve boxes."

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