Barber Colman Company

George E Fransson

Stuart J Johnson

Edward W Haug

Edward J Haug

The gear shaping machine is of simplified construction and is dedicated essentially to forming only a single type of gear or a narrow range of gears. To enable the machine to be of simplified construction, the drive train between the cutter and work spindles consists of only four gears in a machine for cutting internal gears and consists of only four gears and a direction-changing idler in a machine for cutting external gears. Relative infeeding of the cutter and the work blank is effected by pivoting one of the spindles relative to the other spindle with one of the drive gears walking around another one of the drive gears during such pivoting. The differential rotation of the spindles produced by the pivoting action is negated in order to keep the spindles in proper rotational relationship.

Gear shaping machine

The hobbing machine is of simplified construction and is dedicated essentially to forming only a single type of gear or a narrow range of gears. To enable the machine to be of simplified construction, its drive train consists of only four gears and its hob head is mounted to pivot around the axis of the drive shaft for the work spindle. The arrangement of the four gears together with the pivotal movement of the hob head enables the hob spindle to be inclined at a predetermined setting angle relative to the work spindle and enables the center distance between the spindles to be selectively changed.

Hobbing machine

A method and apparatus for generating a shape on the periphery of a non-rotating workpiece by orbiting a rotating shaping cutter in cutting engagement with the workpiece while reciprocating the cutter along its own axis.

Shape generation by orbiting a rotating shaping cutter

A method for generating a shape on the periphery of a non-rotating workpiece by orbiting a rotating hob in cutting engagement with the workpiece while moving the hob and workpiece relatively lengthwise of the workpiece.

Method of shape generation by orbiting a rotating hob

A method and apparatus for generating a shape on the periphery of a non-rotating workpiece by orbiting a rotating cutter in cutting engagement with the workpiece. Either the cutter or the workpiece is moved linearly in the lengthwise direction of the workpiece.

Hobbing apparatus with orbiting hob

A newly formed gear is checked for composite error by holding the gear in a rotationally stationary position and by orbiting and rolling a master gear around the newly formed gear.

Growing community of inventors

Rockford, IL, United States of America

George E Fransson