David P Ball

US Patent:

44602278, Jul 17, 1984

Filed:

Jul 17, 1981

Appl. No.:

6/284249

Inventors:

David J. Ball - Pacific Palisades CA

Assignee:

Automation Industries, Inc. - Greenwich CT

International Classification:

H01R 1356

US Classification:

339 94M

Abstract:

A multi-wire cable grommet constructed of a pliable material has a plurality of apertures extending therethrough and wire-sealing wall portions, one for each cable wire. Centrally located and extending angularly inwardly from the aperture wall is a generally cone-shaped wall portion which terminates in an opening smaller than the wire diameter. The opening in the cone-shaped portion lies on the aperture axis and is encompassed by a bead with wall thickness being relatively thin so that any wire movements transversely of the aperture axis will be taken up by bending of the conical wall rather than by any tendency of the conical member opening bead to be stretched away from sealing relationship with the wire.

US Patent:

40749274, Feb 21, 1978

Filed:

Jul 26, 1976

Appl. No.:

5/708477

Inventors:

David J. Ball - Pacific Palisades CA

Assignee:

Automation Industries, Inc. - Los Angeles CA

International Classification:

H01R 1354

US Classification:

339 89M

Abstract:

An electrical connector having cooperable mating and unmating plug and receptacle means carrying a dielectric insert member within a cylindrical shell and having an insert member compressible retainer ring for immovably axially holding an insert member against a positioning shoulder within the shell.

US Patent:

RE319953, Oct 1, 1985

Filed:

Jan 19, 1984

Appl. No.:

6/571918

Inventors:

David J. Ball - Pacific Palisades CA

Assignee:

Automation Industries, Inc. - Greenwich CT

International Classification:

H01R 13639

US Classification:

339113R

Abstract:

An electrical connector having a receptacle including a receptacle shell and a plug including a plug housing, a coupling nut threaded on the plug housing and engaged with a coupling ring, the coupling nut having threaded engagement with the plug housing and the coupling ring having locking flanges engageable with cooperable locking lands on the receptacle shell, the plug and receptacle being adapted to be fully electrically mated and locked by rotation of the coupling ring through about 90 degrees. An arcuate detent member subtending an angle of about 180 degrees is keyed to the plug housing for relative axial movement of the plug housing, and is received within an annular groove in the coupling ring for resilient forcible selective engagement of opposite radially outwardly enlarged ends of the arcuate detent member with two sets of radially outwardly formed recesses in the coupling ring. When the coupling ring is rotated to the fully locked position of the plug and receptacle means, the ends of the arcuate member are forcibly snapped into one set of recesses to indicate attainment of the locked and fully mated position by sound and by feel. Rotation of the coupling ring in the opposite direction unlocks the plug and receptacle and the enlarged ends of the detent member are released from the first set of recesses to engage a second set of recesses in the coupling ring to audibly and tactilely indicate attainment of the unlocked position.

US Patent:

45573646, Dec 10, 1985

Filed:

Jan 3, 1985

Appl. No.:

6/688614

Inventors:

David C. Ball - La Puente CA

Assignee:

The W. W. Sly Manufacturing Co. - Cleveland OH

International Classification:

B65G 1100

US Classification:

193 25C

Abstract:

A bulk material conveyor comprises an elongated flexible conveying duct and apparatus for viewing the materials being transferred within the duct. The apparatus maintains a fluid stream proximate to the apparatus for viewing. The apparatus for maintaining a fluid stream in one form includes first, second and third truncated conical members which are disposed in generally coaxial relationship. At least part of each truncated conical member overlaps at least one other truncated conical member.

US Patent:

42771250, Jul 7, 1981

Filed:

Jul 12, 1979

Appl. No.:

6/057134

Inventors:

David J. Ball - Pacific Palisades CA

Assignee:

Automation Industries, Inc. - Greenwich CT

International Classification:

H01R 13639

US Classification:

339113R

Abstract:

An electrical connector having a receptacle including a receptacle shell and a plug including a plug housing, a coupling nut threaded on the plug housing and engaged with a coupling ring, the coupling nut having threaded engagement with the plug housing and the coupling ring having locking flanges engageable with cooperable locking lands on the receptacle shell, the plug and receptacle being adapted to be fully electrically mated and locked by rotation of the coupling ring through about 90 degrees. An arcuate detent member subtending an angle of about 180 degrees is keyed to the plug housing for relative axial movement of the plug housing, and is received within an annular groove in the coupling ring for resilient forcible selective engagement of opposite radially outwardly enlarged ends of the arcuate detent member with two sets of radially outwardly formed recesses in the coupling ring. When the coupling ring is rotated to the fully locked position of the plug and receptacle means, the ends of the arcuate member are forcibly snapped into one set of recesses to indicate attainment of the locked and fully mated position by sound and by feel. Rotation of the coupling ring in the opposite direction unlocks the plug and receptacle and the enlarged ends of the detent member are released from the first set of recesses to engage a second set of recesses in the coupling ring to audibly and tactilely indicate attainment of the unlocked position.

US Patent:

45084076, Apr 2, 1985

Filed:

Dec 2, 1982

Appl. No.:

6/446120

Inventors:

David J. Ball - Encino CA

Assignee:

International Telephone & Telegraph Corporation - New York NY

International Classification:

H01R 1354

US Classification:

339 89R

Abstract:

A self-locking connector in which balls carried by a connector shell are spring biased toward a locking ring which is rotatable with the coupling nut of the connector. The ring is formed with a circular array of detent recesses with which the balls engage when the coupling nut is rotated. The balls and recesses are arranged so that only one ball engages a recess at any instant so that there are a large number of locking positions for the coupling nut.

US Patent:

20210065667, Mar 4, 2021

Filed:

Aug 29, 2019

Appl. No.:

16/556088

Inventors:

- Torrance CA, US
David M. Kramer - Redondo Beach CA, US
David E. Ball - Redondo Beach CA, US

International Classification:

G10H 3/18

Abstract:

An optical head assembly for sue with a stringed musical instrument, the vibrations of the strings causing a light beam to be modulated in accordance with the frequency of the vibrating strings. The modulated light output, produced by the relative motion between two adjacent grates, is coupled to a device with converts the modulated light beam to a corresponding modulated electrical signal which, in turn, is coupled to an amplifier associated with the instrument.