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Bernard S Willard, 844193 Pine Island Rd, Hollywood, FL 33328

Known as:
Bernard Williard Lisa Willard
Related to:
Lisa E Hanson 62

Bernard Willard Phones & Addresses

4193 Pine Island Rd, Davie, FL 33328    954-2360010   

4193 S Pine Island Rd APT 4, Davie, FL 33328   

5765 87Th Ave, Hollywood, FL 33025   

Cooper City, FL   

Fort Lauderdale, FL   

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Bernard Willard Photo 23

Bernard Willard

Bernard Willard Photo 24

Pres At Willard Electroacoustics

Position:
PRES at WILLARD ELECTROACOUSTICS
Location:
Aland Islands
Industry:
Entertainment
Work:
WILLARD ELECTROACOUSTICS
PRES

Publications & IP owners

Us Patents

Sonar Projector With Liquid Mass Loading For Operation At Lower Frequency

US Patent:
5062089, Oct 29, 1991
Filed:
Nov 13, 1990
Appl. No.:
7/611729
Inventors:
Bernard Willard - Davie FL
Gerard K. Forsberg - Lauderdale Lakes FL
Assignee:
Argotec Inc. - Ft. Lauderdale FL
International Classification:
H04R 1500
US Classification:
367172
Abstract:
A sonar projector having a pair of opposed oscillating pistons driven by an electromagnetic assembly is rendered capable of operating at reduced resonant frequency by providing liquid mass loading for the pistons. The mass loading is achieved by utilizing a structure which constricts a body of liquid on one side of the piston. The constricted liquid may be sea water or liquid sealed within the body of the unit. In accordance with a further aspect of the invention, a seal assembly is provided for the moving pistons which not only provides a sealing function but which also acts to radially center the pistons and to provide an axially directed restoring force thereto during piston oscillation. The electromagnetic assembly, in accordance with still a further aspect of the invention, is formed with a permanent magnet structure arranged in a cylindrical configuration with the opposed pistons on opposite axial ends thereof to reduce magnetic leakage losses.

Possible Relatives

Cynthia S Willard  David H Willard  Dawn M Willard  Dean H Willard  Dale R Willard  Dallas Willard  Deborah A Willard  Bernard J Johnson  Bernard Standley  Bernard J Johnston 

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