Francis N Cook

US Patent:

43622615, Dec 7, 1982

Filed:

Sep 17, 1980

Appl. No.:

6/188057

Inventors:

Francis W. Cook - Newington CT

Assignee:

Litton Industrial Products, Inc. - New Britain CT

International Classification:

B23K 2012
B23Q 306

US Classification:

228 2

Abstract:

A friction welding machine comprising a clamp assembly for securing a workpiece against rotation including a pair of opposed chuck means for supporting the pair of chuck means for relative horizontal slidable displacement means for controlling the displacement of the pair of opposed chucks so that the pair of chucks will be conjointly and equally displaced means for displacing the pair of chuck means having first and second vertically oriented arms each pivotally secured at a medial location to the supporting means, first and second link means each connected at one end to one of the chuck means for limited pivotal displacement relative thereto, and at the other end pivotally connected to the top of the corresponding arm, and hydraulic cylinder means extending between and pivotally mounted on the bottom of the arms, and a base for supporting the supporting means, the base having opening means for receiving the hydraulic cylinder means.

US Patent:

41063759, Aug 15, 1978

Filed:

Apr 18, 1975

Appl. No.:

5/569543

Inventors:

Felix J. Gurdak - Winsted CT
Francis W. Cook - Newington CT

Assignee:

Litton Industrial Products, Inc. - New Britain CT

International Classification:

B23B 332

US Classification:

82 21B

Abstract:

A high-production, precision machine tool has means for varying the feed rate of the tool during the actual machining of each workpiece. The means comprise a plurality of program cams disposed on the camshaft of the machine tool for selecting the appropriate feed rate at the desired time during the machining operation. The camshaft is rotated by a permanent magnet D. C. motor, and as the camshaft rotates, the program cams, in turn, trip a plurality of switches to gate one of several predetermined voltage signals representative of the desired motor speeds to a comparator which compares the gated signal with the output of a tachometer measuring the actual motor speed. The difference, a voltage signal representative of the correction to be made to the motor, is applied to a silicon controlled rectifier firing circuit which selectively fires an SCR network, generating a shaped pulse to provide a controlled voltage input to the motor, thereby selectively controlling its speed.