US Patent: 2,696,135 - Contour Attachment


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US Patent: 2,696,135

Contour Attachment

Patentees:

James E. Ettorre (exact or similar names) - Bridgeport, Fairfield County, CT

Edward P. Bullard, III (exact or similar names) - Fairfield, Fairfield County, CT

USPTO Classifications:

29/57, 82/12, 82/137

Tool Categories:

metalworking machines : metal lathes : metal lathe accessories and attachments

Assignees:

Bullard Co. - Bridgeport, Fairfield County, CT

Manufacturer:

Bullard Co. - Bridgeport, Fairfield County, CT

Witnesses:

none listed

Patent Dates:
Applied:	Aug. 05, 1950
Granted:	Dec. 07, 1954

Patent Pictures:

USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Joel Havens
Vintage Machinery entry for Bullard Machine Tool Co.

Description:

Claim:

In general, lathes are adapted to feed a cutting tool along two intersecting paths normally at right angles to each other. By engaging the feeds for both paths simultaneously, the tool is caused to move along a path at forty-five degrees to the horizontal such for example as shown in Patent #2,355,625.

Contouring apparatus for a machine tool comprising in combination, a main tool block adapted to be moved along a predetermined rectilinear path which lies at an angle between but substantially different from the extreme angles of the contour to be produced, said main tool block being provided with a channel-shaped passage extending longitudinally therethrough; a pivot pin extending through said channel-shaped passage and fixed in the side walls thereof; a lever pivoted on said pin; a cutting tip held by said pivoted lever; a cam roller on said pivoted lever; a cam plate reciprocally mounted within said channel-shaped passage and provided with an elongated opening through which said pivot pin passes; a cam path in said cam plate, the form of which is dependent upon simultaneous effective components of movement of said main tool block and said cam plate in opposite directions, and within which cam path the cam roller on said pivoted lever extends; an abutment ear on said cam plate; an auxiliary, independently movable tool block adapted to be moved along a path in a direction having a component of movement opposite to a component of movement of said main tool block; and means on said auxiliary tool block adapted to engage said abutment ear on said cam plate, whereby during a contouring operation, said lever is pivoted in accordance with the contour of said cam path and the rate of relative movement of said main and auxiliary tool blocks.