WILLIAM AHERN
Engineering in Belmont, MA
License number
Massachusetts 17664
Issued Date
Dec 8, 1961
Expiration Date
Jun 30, 2018
Type
Structural Engineer
Address
Address
Belmont, MA 02478
Professional information
Floor System With Low Resistance To Impact
US Patent:
5323574, Jun 28, 1994
Filed:
Apr 5, 1991
Appl. No.:
7/681570
Inventors:
William W. Ahern - Belmont MA
Assignee:
Electronic Space Systems Corporation - Concord MA
International Classification:
E04B 100
US Classification:
52 98
Abstract:
A floor system with low resistance to impact has loosely connected separate light weight components forming a support frame upon which a plurality of floor panels is disposed. The support frame is comprised of a plurality of support elements which, in turn, are constructed of a plurality of support members each having a maximum dimension of at most a predetermined fixed size. The plurality of floor panels is disposed onto of and supported by the support elements. The floor panels preferably have mating beveled edges, which bevels facilitate the panels in kicking up and over each other upon substantially horizontal impact. The position of the floor panels is relative to the support elements is loosely maintained by cooperating short pins and holes. In one aspect of the invention, the support elements are spaced apart and are not connected to each other for support. In another aspect, the support elements are interconnected and supported by a supporting structure.
Frangible Enclosure With Low Resistance To Impact
US Patent:
5299397, Apr 5, 1994
Filed:
Apr 5, 1991
Appl. No.:
7/681572
Inventors:
William W. Ahern - Belmont MA
Assignee:
Electronic Space Systems Corporation - Concord MA
International Classification:
E04B 100
US Classification:
52 98
Abstract:
A frangible enclosure with low resistance to impact has a curvature such that a distributed load primarily is resisted by axial stresses generated therein, in little or no bending stresses are generated. Weakened portions are made in the enclosure which reduce the flexural strength of the enclosure. The enclosure is made of a plurality of panels, which panels are constructed of a composite laminate of fiber reinforced material. The panels are interconnected to form a housing, or enclosure. Weakened portions in the panel can be made by perforating or cutting the material of which the laminate is made. A floor system can also be provided for an enclosure. Such a floor system, which is also frangible, is made of a support frame upon which the floor panels rest and loosely engage. The floor support frame can be supported by the base of the enclosure, or other supporting objects in the enclosure. If the enclosure is used for an antenna, it also incorporates an ice prevention system having a plurality of frangible wires.
Spherical Structural Arrangement
US Patent:
4026078, May 31, 1977
Filed:
Feb 9, 1976
Appl. No.:
5/656340
Inventors:
William W. Ahern - Belmont MA
Birgit T. Mathe - Cambridge MA
Birgit T. Mathe - Cambridge MA
Assignee:
GeoMetrics - Cambridge MA
International Classification:
E04B 132
US Classification:
52 81
Abstract:
A self-supporting radome construction is formed from a random distribution of four basic structural elements assembled in a standard reoccurring pattern. The elements define four basic triangular openings. Each triangular opening is covered with a panel, and only four panel sizes are required whether or not the interior surface is the same or different than the exterior surface.