JOHN RODERICK KELLER
Pilots at Portesuello Ave, Santa Barbara, CA
License number
California A0996144
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
1403 Portesuello Ave, Santa Barbara, CA 93105
Professional information
System And Method For Reducing Oscillating Tool-Induced Reaction Forces
US Patent:
6621241, Sep 16, 2003
Filed:
Dec 20, 2001
Appl. No.:
10/028501
Inventors:
Steven L. Reid - Torrance CA
John R. Keller - Santa Barbara CA
Joseph K. Bond - Newbury Park CA
John R. Keller - Santa Barbara CA
Joseph K. Bond - Newbury Park CA
Assignee:
DAC International, Inc. - Carpinteria CA
International Classification:
H02K 3300
US Classification:
318114, 318460, 318119, 1731621, 81463
Abstract:
A system and method for reducing reaction forces induced in a machine frame by an oscillating tool employs a counterforce assembly which is driven to move along linear slides mounted to the machine frame. The counterforce assembly is driven with a drive signal derived from two signals: a first signal which is proportional to the acceleration of the tool, and a second signal which is directly proportional to the velocity of the oscillating tool. By properly-adjusting the acceleration and velocity components of the drive signal, the magnitude of the reaction forces induced in the machine frame by the oscillating tool can be substantially reduced. The counterforce assembly preferably includes a centering means which prevents it from moving to either end of the slide. An accelerometer is preferably mounted to the machine frame to sense its vibration, with the accelerometer output used to adjust the counterforce assemblys drive electronics to reduce vibration to a minimum.
Fining And Polishing Machine And Method For Ophthalmic Lenses
US Patent:
6074281, Jun 13, 2000
Filed:
Nov 30, 1998
Appl. No.:
9/200626
Inventors:
S. Keith Swanson - Santa Barbara CA
John R. Keller - Santa Barbara CA
John R. Keller - Santa Barbara CA
Assignee:
Dac Vision, Inc. - Carpinteria CA
International Classification:
B24B 100
US Classification:
451 42
Abstract:
A fining and polishing machine and method enable a work piece, suitably a spectacle lens, to be polished with a relative motion between the lens and a tool that is precisely matched to the specific lens prescription. The lens and tool are reciprocated along first and second non-co-linear axes, respectively, and the lens is polished as each reciprocates. The relative motion between lens and tool is equal to the vector sum of their individual motions. By precisely controlling the reciprocation of lens and tool, a wide range of desired motions can be obtained, enabling a lens to be polished to a particular prescription by altering the frequency and/or amplitude of the reciprocating motions along the two axes. A controller drives a pair of actuators which reciprocate the lens and tool in accordance with resident motion equations, as realized with prescription-specific amplitude and frequency parameters received as inputs.
Single-Point Flexure Toric Contact Lens Forming Machine And Method
US Patent:
6170367, Jan 9, 2001
Filed:
Sep 9, 1998
Appl. No.:
9/150052
Inventors:
John R. Keller - Santa Barbara CA
Richard L. Cooksey - Camarillo CA
Richard L. Cooksey - Camarillo CA
International Classification:
B23B 500
US Classification:
82 111
Abstract:
In a fast tool servo, a single-point flexure mechanism amplifies a low force, large stroke range actuator's force while reducing its stroke range to reduce the arcuate motion of the cutting tool. The flexure mechanism bends around a pivot point in the X-Z plane and is very stiff along the Y-axis. The actuator applies force to the unpinned end of a lever arm causing it to move back-and-forth through a large stroke range. In response, the shorter tool arm rocks around the pivot point causing the tool to oscillate back-and-forth along the Z-axis through a very shallow arc thereby superimposing the toric deviation on the base curve while maintaining surface quality.
Polishing Machine Comprising A Work Chamber And A Platform
US Patent:
7591710, Sep 22, 2009
Filed:
Dec 30, 2005
Appl. No.:
11/320734
Inventors:
James W. Drain - Carpinteria CA, US
John R. Keller - Santa Barbara CA, US
Steven L. Reid - Goleta CA, US
Joseph K. Bond - Carpinteria CA, US
Maggy Perrier - Guignes, FR
Laurent Marcepoil - Chatillon, FR
Eric Comte - Thorigny sur Marne, FR
John R. Keller - Santa Barbara CA, US
Steven L. Reid - Goleta CA, US
Joseph K. Bond - Carpinteria CA, US
Maggy Perrier - Guignes, FR
Laurent Marcepoil - Chatillon, FR
Eric Comte - Thorigny sur Marne, FR
Assignee:
Essilor International (Compagnie Generale d'Optique) - Charenton-le-Pont
International Classification:
B24B 49/00
US Classification:
451 11, 451 14, 451240
Abstract:
A polishing machine for optical elements, comprising:.
Polishing Machine Comprising Sliding Means Transverse To The Front Face
US Patent:
7396275, Jul 8, 2008
Filed:
Dec 30, 2005
Appl. No.:
11/320951
Inventors:
James W. Drain - Carpinteria CA, US
John R. Keller - Santa Barbara CA, US
Steven L. Reid - Goleta CA, US
Joseph K. Bond - Carpinteria CA, US
Maggy Perrier - Guignes, FR
Laurent Marcepoil - Chatillon, FR
Eric Comte - Thorigny sur Marne, FR
John R. Keller - Santa Barbara CA, US
Steven L. Reid - Goleta CA, US
Joseph K. Bond - Carpinteria CA, US
Maggy Perrier - Guignes, FR
Laurent Marcepoil - Chatillon, FR
Eric Comte - Thorigny sur Marne, FR
Assignee:
Essilor International (Compagnie General d'Optique) - Charenton le Pont
International Classification:
B24B 49/00
US Classification:
451 11, 451 42, 451240, 451277
Abstract:
A polishing machine for optical elements, comprising:.