Paul D Jacobs

US Patent:

50541587, Oct 8, 1991

Filed:

Dec 11, 1990

Appl. No.:

7/625968

Inventors:

William H. Williams - Rancho Palos Verdes CA
Paul G. Jacobs - Northridge CA

International Classification:

A47L 534

US Classification:

15354

Abstract:

A scrubbing machine/vacuum cleaner which is carried by two spaced-apart front wheels and two spaced-apart rear wheels, having affixed to and extending from the front of the machine a cleaning head and brush assembly which is adapted to ride in proximity to, but in spaced-apart relationship from, the surface to be cleaned when all four wheels are resting on the surface to be cleaned. During actual cleaning operation, the head and brush assembly is adapted to press on the surface to be cleaned when the two rear wheels are raised from the surface to be cleaned. The front wheel assembly comprises a cross-member forming part of the frame carrying the machine, the cross-member having swivelably mounted thereto an axle. The axle carries the front wheels at its ends whereby the cleaning head is kept flat on the floor during the cleaning operation as the machine rolls over irregularities in the surface to be cleaned.

US Patent:

51749319, Dec 29, 1992

Filed:

Apr 27, 1990

Appl. No.:

7/515479

Inventors:

Thomas A. Almquist - San Gabriel CA
Borzo Modrek - Montebello CA
Paul F. Jacobs - La Crescenta CA
Charles W. Lewis - Sherman Oaks CA
Mark A. Lewis - Valencia CA
Abraham Liran - Northridge CA

Assignee:

3D Systems, Inc. - Valencia CA

International Classification:

B29C 3508
B29C 4102

US Classification:

264 22

Abstract:

Apparatus and methods for stereolithographically forming a three-dimensional object includes a vessel for holding a building material and a smoothing member for forming a uniform coating over a previously formed layer of the object. The smoothing member has a plurality of blades. The smoothing member is swept over a previously formed layer of the object, in at least two directions. Different clearances between the lower surface of the smoothing member and the upper surface of the previously formed layer are used to provide a uniform coating for a subsequent layer over the previously formed layer. The sweeping velocity of the smoothing member can be varied. Retractable needles are attached to the smoothing member for adjusting a blade gap between the lower surface of the smoothing member and the surface of the building material.

US Patent:

44634749, Aug 7, 1984

Filed:

Jun 7, 1982

Appl. No.:

6/385493

Inventors:

Paul G. Jacobs - Northridge CA

International Classification:

A47L 700

US Classification:

15353

Abstract:

A vacuum cleaner is provided which includes an easily removable recovery tank mounted on a support structure and having a cover on the tank forming a vacuum chamber in the tank, the cover being hinged to the support structure by a hollow hinge. A vacuum fan is mounted on the support structure and draws air from the vacuum chamber through the cover and through the hollow hinge.

US Patent:

48093971, Mar 7, 1989

Filed:

Jan 21, 1986

Appl. No.:

6/821543

Inventors:

Paul G. Jacobs - Northridge CA
Bonifacio N. Avecilla - Alhambra CA
Norman Lapworth - Los Angeles CA

Assignee:

Edic - Los Angeles CA

International Classification:

A47L 700

US Classification:

15320

Abstract:

A mobile rug or carpet cleaner is provided with a support housing having front and rear wheels mounted so that the unit is tilted about the housing axis of the front wheels to engage and disengage a cleaning head with the carpet to be cleaned. The cleaner includes a fluid delivery system which provides fluid flow to the cleaning head, an auxiliary cleaning head and a spotter. The fluid delivery system utilizes a pump having an open conduit which continuously recycles cleaning fluid to a reservoir. The continuous recycle allows a solenoid valve in a line transporting fluid to the cleaning head spray nozzles to be abruptly closed without subjecting the entire fluid delivery system to a sudden, potentially damaging increase in fluid pressure. An automatic drain system utilizes a vacuum line to direct spent cleaning fluid to a removable waste tank for disposal. Suction can be selectively directed to the cleaning head or to the auxiliary head.

US Patent:

46783229, Jul 7, 1987

Filed:

May 30, 1986

Appl. No.:

6/868983

Inventors:

Joel R. Finkel - Woodland Hills CA
Paul F. Jacobs - La Crescenta CA
Kenneth I. Gustafson - Glendora CA
William D. Green - Sunland CA

Assignee:

Xerox Corporation - Stamford CT

International Classification:

G03G 1500

US Classification:

355133

Abstract:

Method and apparatus are disclosed for the prevention of unauthorized copying of documentation on an office, or other type, copier. Unique phosphors are applied to paper. When such a paper is placed on or in a copier so prepared, the presence of the phosphor is detected and the copier is disabled. Inside the copier a laser emits a beam toward the paper. Two detectors detect, respectively, the laser light reflected from the document and the stimulated light from the phosphor coating or layer. Detection of both signals, in the proper time sequence, will cause the photocopier to cease operation prior to electrostatic or other capture of the image. Upconversion phosphors could be utilized as the phosphor coating due to their scarcity and unliklihood of use in this manner.

US Patent:

47568828, Jul 12, 1988

Filed:

Jan 27, 1987

Appl. No.:

7/006855

Inventors:

Paul T. Jacobs - Arlington TX
Szu-Min Lin - Arlington TX

Assignee:

Surgikos Inc. - Arlington TX

International Classification:

A61L 214
A61L 218

US Classification:

422 23

Abstract:

A sterilization process wherein articles contacted with hydrogen peroxide and containing trace amounts of residual hydrogen peroxide are subjected to plasma treatment to generate an active species from the residual hydrogen peroxide which effects sterilization of the article and concurrently removes the residual hydrogen peroxide by converting it into non-toxic decomposition products.

US Patent:

59025379, May 11, 1999

Filed:

Jan 28, 1997

Appl. No.:

8/790005

Inventors:

Thomas A. Almquist - San Gabriel CA
Charles W. Hull - Santa Clarita CA
Jeffrey S. Thayer - Simi Valley CA
Richard N. Leyden - Topanga Canyon CA
Paul F. Jacobs - La Crescenta CA
Dennis R. Smalley - Newhall CA

Assignee:

3D Systems, Inc. - Valencia CA

International Classification:

B29C35/08;41/02

US Classification:

264401

Abstract:

Methods and apparatus for use in building three-dimensional objects on substantially a cross-sectional basis including methods and apparatus for forming successive layers using counter-rotating rollers, ink jet recoaters, spinning members which sling material, applicator bars that dispense material via a meniscus and/or independently dispensed streams, and also including methods and apparatus to determine a preferred region over which to form a layer and to check for building errors.

US Patent:

47389010, Apr 19, 1988

Filed:

Mar 27, 1987

Appl. No.:

7/030530

Inventors:

Joel R. Finkel - Woodland Hills CA
Paul F. Jacobs - La Crescenta CA
Kenneth I. Gustafson - Glendora CA
William D. Green - Sunland CA

Assignee:

Xerox Corporation - Stamford CT

International Classification:

B32B 1304

US Classification:

428690

Abstract:

Method and apparatus are disclosed for the prevention of unauthorized copying of documentation on an office, or other type, copier. Unique phosphors are applied to paper. When such a paper is placed on or in a copier so prepared, the presence of the phosphor is detected and the copier is disabled. Inside the copier a laser emits a beam toward the paper. Two detectors detect, respectively, the laser light reflected from the document and the stimulated light from the phosphor coating or layer. Detection of both signals, in the proper time sequence, will cause the photocopier to cease operation prior to electrostatic or other capture of the image. Upconversion phosphors could be utilized as the phosphor coating due to their scarcity and unliklihood of use in this manner.