Ricky J Madsen

US Patent:

43097324, Jan 5, 1982

Filed:

Oct 5, 1979

Appl. No.:

6/082237

Inventors:

Leonard E. Kronfeld - Minneapolis MN
Ricky J. Madsen - Crystal MN

Assignee:

Nortronics Company, Inc. - Minneapolis MN

International Classification:

G11B 554
G11B 548
G11B 2116
G11B 522

US Classification:

360104

Abstract:

An electromagnetic transducer assembly includes a carriage 30 carrying a first transducer 33 projecting therefrom and a load arm 35 carrying a second transducer 32 arranged for gimballing movement about a pair of mutually perpendicular axes, the arm being connected to the carriage by a leaf hinge assembly 43 for movement to load or unload transducer 32 to the disk recording medium 20. The transducers have planar disk engaging faces surrounded by edge bevels which merge smoothly with each other at conical corner surfaces 144, 157, and which are blended smoothly into the faces. The second transducer 32 is mounted in the arm on a flexure member 65, which also mounts a connector block 75 to which a flex strip 81 is connected, and which includes eyelet pins for facilitating the wiring of the transducer coils. The arm has an aperture 60 near the end which includes transducer 32 which permits access thereto during assembly. Insert cover 120 fits the aperture and includes a lifting tab 122, and an adjustable pivot member 133 for the gimballing of the transducer.

US Patent:

60816708, Jun 27, 2000

Filed:

Mar 5, 1999

Appl. No.:

9/263409

Inventors:

Ricky J. Madsen - Crystal MN
Jon A. Holmes - Eden Prairie MN
Trygve D. Peterson - Savage MN

Assignee:

Lifetouch National School Studies Inc. - Eden Prairie MN

International Classification:

G03B 1330

US Classification:

396 88

Abstract:

An apparatus for controlling a camera to achieve sharp, clear pictures includes a sensor for determining the distance of the camera from a subject and a controller for calculating the camera's depth-of-field, determining whether the subject is within the depth-of-field, and generating various signals which are provided to control operation of the camera or convey pertinent information to the photographer.

US Patent:

43430252, Aug 3, 1982

Filed:

Oct 5, 1979

Appl. No.:

6/082236

Inventors:

Leonard E. Kronfeld - Minneapolis MN
Thomas J. Winkler - Isanti MN
Ricky J. Madsen - Crystal MN

Assignee:

Nortronics Company, Inc. - Minneapolis MN

International Classification:

G11B 554
G11B 548
G11B 2116
G11B 522

US Classification:

360104

Abstract:

An electromagnetic transducer assembly includes a carriage 30 carrying a first transducer 33 projecting therefrom and a load arm 35 carrying a second transducer 32 arranged for gimballing movement about a pair of mutually perpendicular axes, the arm being connected to the carriage by a leaf hinge assembly 43 for movement to load or unload transducer 32 to the disk recording medium 20. The transducers have planar disk engaging faces surrounded by edge bevels which merge smoothly with each other at conical corner surfaces 144, 157, and which are blended smoothly into the faces. The second transducer 32 is mounted in the arm on a flexure member 65, which also mounts a connector block 75 to which a flex strip 81 is connected, and which includes eyelet pins for facilitating the wiring of the transducer coils. The arm has an aperture 60 near the end which includes transducer 32 which permits access thereto during assembly. Insert cover 120 fits the aperture and includes a lifting tab 122, and an adjustable pivot member 133 for the gimballing of the transducer.