Thomas P O'Connor

US Patent:

39888630, Nov 2, 1976

Filed:

Nov 20, 1975

Appl. No.:

5/633614

Inventors:

Thomas J. O'Connor - Ann Arbor MI

International Classification:

B24B 1900

US Classification:

51157

Abstract:

A machine for producing a rotary orbital motion between a cutting master having an abrasive mirror image surface of a form to be abraded into a friable material and a workpiece of friable material while moving the surface of the cutting master and workpiece into contact including adjustable eccentric means for varying the rotary orbital motion between the workpiece and the cutting master, a hydraulic piston and cylinder for moving the cutting master and workpiece into engagement with each other during imparting of the rotary orbital motion between the cutting master and workpiece, hydraulic means for applying predetermined variable pressure between the cutting master and workpiece, a control circuit for controlling the operation of the total form abrading machine including means for controlled pulsing of the cutting master away from the workpiece, and means for flushing between the electrode and workpiece during an abrading operation, and the method of using the total form abrading machine.

US Patent:

41563271, May 29, 1979

Filed:

Apr 12, 1976

Appl. No.:

5/675964

Inventors:

Thomas J. O'Connor - Ann Arbor MI

Assignee:

Easco-Sparcatron, Inc. - Ann Arbor MI

International Classification:

B24B 100

US Classification:

51281R

Abstract:

The method of abrasion forming friable material such as carbon blocks to form electrical discharge machining electrodes therefrom comprising the steps of moving a master model, having an abrasive surface which is a mirror image of a desired form to be abrasion machined in the friable material, which surface is related in size to the desired form to be machined by an additional movement to be imparted to the master model, toward the friable material with the abrasive surface of the master model and workpiece in engagement while imparting the additional relative motion between the master model and workpiece, which additional relative motion is in all directions in a plane perpendicular to the direction of movement of the master model and workpiece and flushing between the master model and workpiece to prevent build up of abraded particles of the workpiece on the master model.

US Patent:

40880320, May 9, 1978

Filed:

Feb 24, 1975

Appl. No.:

5/552194

Inventors:

Thomas J. O'Connor - Ann Arbor MI

Assignee:

Easco-Sparcatron, Inc. - Ann Arbor MI

International Classification:

F16H 2116

US Classification:

74 25

Abstract:

Servo head structure for electrical discharge machining or the like comprising a rectangular frame having a rectangular ram positioned therein, bearing means for guiding the rectangular ram for movement in the frame, a shaft rotatably mounted in the frame and extending through the ram, a rotary hydraulic servo motor secured to the frame and connected to the shaft for rotation of the shaft, and cable means secured at opposite ends thereof to opposite ends of the ram and wrapped around the shaft centrally thereof, whereby on rotation of the servo motor controlled movement of the ram with respect to the frame is accomplished.

US Patent:

39628302, Jun 15, 1976

Filed:

Dec 3, 1973

Appl. No.:

5/420808

Inventors:

Thomas J. O'Connor - Ann Arbor MI

International Classification:

B24B 700

US Classification:

51 58

Abstract:

A tool for universal movement of a cutting member in a plane perpendicular to a predetermined direction of movement of the cutting member is disclosed. The tool is disclosed in conjunction with an abrasive electrode form having a shape which is the reverse image of an electrode to be produced thereby and which is constructed of abrasive particles held in a plastic matrix whereby an electrode may be abraded from electrode material on movement of the electrode form toward the electrode material in the predetermined direction. The structure for universally moving the electrode form cutting member in a plane perpendicular to the direction of movement of the cutting member includes relatively eccentric, and rotatable members positioned in two slides slidably mounted perpendicularly to each other.

US Patent:

40138623, Mar 22, 1977

Filed:

Jan 17, 1975

Appl. No.:

5/541738

Inventors:

Thomas J. O'Connor - Ann Arbor MI

International Classification:

B23P 108

US Classification:

219 69E

Abstract:

A tool holder for supporting a tool for both sliding and pivotal movement in two relatively perpendicular directions including a generally cylindrical base having a dovetail connecting portion on one end thereof and a double diameter recess in the other end thereof, a generally cylindrical tool supporting member having a radially outwardly extending flange on one end thereof fitting within the larger diameter portion of the recess in the base, a recess extending into the one end of the tool supporting member, a pair of rods extending perpendicularly to each other, one extending across the smaller diameter portion of the recess in the base and the other extending across the recess in the tool supporting member, and a connecting member pivotally and slidably secured at the opposite ends thereof on the rods, two pairs of spaced apart relatively perpendicularly located pivot angle adjusting screws extending through the flange of the tool supporting member into engagement with the base, and two pairs of transverse position adjusting screws extending relatively perpendicularly to each other transversely through the base and into contact with the tool supporting member.

US Patent:

39888649, Nov 2, 1976

Filed:

Nov 20, 1975

Appl. No.:

5/633615

Inventors:

Thomas J. O'Connor - Ann Arbor MI

International Classification:

B24B 1900

US Classification:

51157

Abstract:

A machine for producing a rotary orbital motion between a cutting master having an abrasive mirror image surface of a form to be abraded into a friable material and a workpiece of friable material while moving the surface of the cutting master and workpiece into contact including adjustable eccentric means for varying the rotary orbital motion between the workpiece and the cutting master, a hydraulic piston and cylinder for moving the cutting master and workpiece into engagement with each other during imparting of the rotary orbital motion between the cutting master and workpiece, hydraulic means for applying predetermined variable pressure between the cutting master and workpiece, a control circuit for controlling the operation of the total form abrading machine including means for controlled pulsing of the cutting master away from the workpiece, and means for flushing between the electrode and workpiece during an abrading operation, and the method of using the total form abrading machine.

US Patent:

39486206, Apr 6, 1976

Filed:

Sep 14, 1973

Appl. No.:

5/397335

Inventors:

Thomas J. O'Connor - Ann Arbor MI

International Classification:

C08G 5112

US Classification:

51298A

Abstract:

A cutting master for total form abrasion machining a predetermined shape in a friable material including a body having a surface which is substantially the mirror image of a shape to be machined by abrasion, which surface is abrasive, is different in size from the shape to be abrasion machined by a predetermined amount, and includes a flat portion having a dimension related to the difference in size between the predetermined shape and the abrasive surface.

US Patent:

39908682, Nov 9, 1976

Filed:

Sep 12, 1975

Appl. No.:

5/612885

Inventors:

Thomas J. O'Connor - Ann Arbor MI

International Classification:

C08G 5112

US Classification:

51298

Abstract:

A cutting master for total form abrasion machining a predetermined shape in a friable material including a body having a surface which is substantially the mirror image of a shape to be machined by abrasion, which surface is abrasive, is different in size from the shape to be abrasion machined by a predetermined amount, and includes a flat portion having a dimension related to the difference in size between the predetermined shape and the abrasive surface.