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GB Patent: GB-549,792
Improvements relating to boring tool holders for boring machines
Patentee:
Henry Ward Lionel Kearns (exact or similar names) - Broadheath, Manchester, England

USPTO Classifications:

Tool Categories:
metalworking machines : drilling and boring : horizontal boring mills

Assignees:
H. W. Kearns & Co., Ltd. - Broadheath, Manchester, England

Manufacturer:
H. W. Kearns & Co., Ltd. - Broadheath, Manchester, England

Witnesses:
Unknown

Patent Dates:
Applied: May 08, 1942
Granted: Dec. 07, 1942

Patent Pictures:
Espacenet patent
Report data errors or omissions to steward Jeff Joslin
Vintage Machinery entry for H. W. Kearns & Co., Ltd.
Description:
"Cutters are set and adjusted on boring bars without removing the bars from the boring-machine. The cutter is held by a set screw e in a saddle b received on a circular or other seating a1 formed between shoulders on the bar a2. The saddle is clamped by a single screw d engaging a key-hole slot so that removal of the screw is not necessary for the release of the saddle. A similar screw g then mounts the saddle on a test bar f of diameter corresponding to the seating a1 and a fine screw h adjusts the cutter with the help of a gauge i carried by a straddle bracket resting on the bar."

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