An Improved Device for Holding Lathe Cutters and other similar Tools firmly in Position.
Year: 1898

page_text: Date of Application, 11th Aug., 1898
Complete Specification Left, 9th May, 1899-Accepted, 8th July, 1899
PROVIDIUNALITICATION.
An Improved Device for Holding Lathe Cutters and other similar
Tools firmly in Position.
I, JOHN WILLIAM OGDEN, Steel Manufacturer, of 24, Bramwell Street, Sheffield,
in the County of York, do hereby declare the nature of this invention to be as
follows:-
According to this invention a lathe cutter or similar tool is made flat or
curved at the top so that the lathe rest or tool box, or other equivalent device
firmly grips the same; while the side or sides of such tool are bevelled outwards
to allow of its readily fitting into the dovetail or buttress shaped groove formed
in the tool holder, by which groove the tool is securely held in the tool holder,
and thus the tool cannot fall out--thus dispensing with the cover, or covering
plate ordinarily used, at the same time the tool being held firmly in position.
Such tool-holder may be of a square, or any other suitable section.
Dated this Tenth day of August 1898.
An Improved Device for Holding Lathe Cutters and other similar
Tools firmly in Position.
I, JOHN WILLIAM OGDEN, of 24, Bramwell Street, Sheffield, in the County of
York, Steel Manufacturer, do hereby declare the nature of this invention and
in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
This invention relates to an improved device for holding lathe cutters or other
similar tools and has for its object to provide means for holding them firmly in
position.
In the accompanying drawings:-
Figure 1 is a side elevation of a tool holder showing the tool in position:
Figures 2, 3 and 4 are end elevations of different forms of holder, and
Figure 5 an end elevation showing a packing strip in position.
Like letters indicate like parts throughout the drawings.
According to this invention a tool holder of suitable cross section is provided
with a longitudinal groove or recess B, preferably with flat sides as shown in
Figures 2, 3, 4 and 5 respectively.
Within the groove or recess B is placed a tool C formed to approximately fit

page_text: the groove. It is not necessary for the tool to exactly fit the groove B, as
angular packing strips 1) or the like may be employed as shown in Figure 5.
The top part of the tool may be flat or curved and is preferably made to extend
beyond the top of the tool holder, so that when the tool is required for use, it
is placed in position in its holder, and the dogs or bars of the lathe-rest are
screwed down tight on the top of the tool firmly gripping it and the holder in
position.
In the case of short-length tools, the tool is screwed down and held with one
dog or bar and the holder by the other, the undercut groove in the holder with
or without the packing piece preventing the tool from lifting up.
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed, I declare that what I
claim is
(1) A tool holder having a longitudinal undercut groove substantially as and
for the purpose described, with or without a packing strip.
(2) The combination of a tool holder having a longitudinal undercut groove
and a tool adapted to fit the groove with or without a packing strip, substantially
as described.
(3) A tool holder of the cross section indicated in Figure 2, or Figure 3, or
Figure 4, or Figure 5 of the accompanying drawings.
Dated this 8th day of May 1898
JOHN WILLIAM OGDEN.
Boult & Wade,
Agents for the Applicant.