John M. Reynard - Framingham MA Thomas N. Carignan - Danvers MA Richard Paglia - Carlisle MA Joseph F. Rich - Danvers MA
Assignee:
Polaroid Corporation - Cambridge MA
International Classification:
H04R 714 H04R 1900
US Classification:
179111R
Abstract:
A method and device for significantly improving the efficiency and sensitivity of an electroacoustical transducer. A relatively inelastic vibratile diaphragm is preformed to the shape of a mating backplate prior to the time it is actually mated to said backplate. By such preforming, the efficiency and sensitivity reducing effects from a wrinkled transducer diaphragm are minimized in that said wrinkles move to a diaphragm region where they have no effect on transducer sensitivity when the backplate is subsequently mated to said diaphragm.
Method For Controlling Wrinkles In A Vibratile Diaphragm
John M. Reynard - Framingham MA Thomas N. Carignan - Danvers MA Richard Paglia - Carlisle MA Joseph R. Rich - Danvers MA
Assignee:
Polaroid Corporation - Cambridge MA
International Classification:
H04R 1900
US Classification:
179111R
Abstract:
A method and device for significantly improving the efficiency and sensitivity of an electroacoustical transducer. A relatively inelastic vibratile diaphragm is preformed to the shape of a mating backplate prior to the time it is actually mated to said backplate. By such preforming, the efficiency and sensitivity reducing effects from a wrinkled transducer diaphragm are minimized in that said wrinkles move to a diaphragm region where they have no effect on transducer sensitivity when the backplate is subsequently mated to said diaphragm.
Fixed Abrasive Articles And Methods Of Forming Same
- Worcester MA, US - Conflans-Sainte-Honorine, FR Srikanth Rapaka - Natick MA, US Joseph R. Rich - Clinton MA, US Katherine M. Sahlin - Old Orchard Beach ME, US Nilanjan Sarangi - Shrewsbury MA, US Andrew B. Schoch - Westborough MA, US
A fixed abrasive article having a body including abrasive particles contained within a bond material, the abrasive particles including shaped abrasive particles or elongated abrasive particles having an aspect ratio of length:width of at least 1.1:1, each of the shaped abrasive particles or elongated abrasive particles having a predetermined position or a predetermined three-axis orientation.
Name / Title
Company / Classification
Phones & Addresses
Joseph Rich Groundsworker Campus Services And Facilities Office
Buffalo State College Colleges, Universities, and Professional Scho...
1300 Elmwood Ave, Blue Bell, PA 19422
Joseph F. Rich Principal
Rich Roofing Co Roofing/Siding Contractor
27 Chestnut St, Wakefield, MA 01880
Joseph W. Rich Governing Person
College Station, LLC
Joseph T. Rich Secretary
MERACOR REALTY CORPORATION
3003 N Central Ave , Phoenix, AZ 85012
Joseph W. Rich Manager
Rich/Alpine, LLC Acquisition/Develop of Real Property
DeSmet Jesuit High School Creve Coeur MO 1971-1975
Community:
Bill Schmidt, Tom Layton, Ted Zink, Brad Leonard, Terry Finnegan, Bill Mcdermott, Matt Klinghammer, G Ho, Robert Chickey, Tim Houlihan, Kevin Evans, Melissa Duba
Katie Cathey, Donal Vonachen, George Jordan, Ann Boals, Martha Freeman, Suzanne Blair, Fred Farthing, Kenneth Craig, Frank Jacks, Robert Payne, Ray Sutton