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US 6,674,342 B2Granted
Electrical signal filter with improved isolation shield
AssigneeEagle Comtronics, Inc.
InventorsJoseph A. Zennamo, Jr., Joseph N. Maguire
Life of this patent
Estimating the term…
Abstract
An electrical signal filter including elongate upper and lower filter housing members abutted along a longitudinal seam between the housing members. The housing members hold at least one circuit board. A ground post is formed integrally with the lower filter housing member and is secured to the circuit board without solder. First and second mechanical engagement members are used to rotationally secure end caps to the housing members without solder. As a result, assembly of the filter components can be accomplished without the need for expensive soldering operations, thus reducing the overall manufacturing cost of the filter.
Claims19
An electrical signal filter, comprising:
- an elongate lower filter housing member extending along a first longitudinal direction from a first end thereof to an opposed second end thereof, and having an inner surface terminating at first and second upper side surfaces that extend from said first end to said second end, said elongate lower filter housing member further comprising a ground post formed integrally therewith and extending upwardly from said inner surface in a direction substantially perpendicular to said first longitudinal direction;
- an elongate upper filter housing member extending along said first longitudinal direction from a first end thereof to an opposed second end thereof, and having an inner surface terminating at first and second lower side surfaces that extend from said first end to said second end, said elongate upper filter housing member abutting said elongate lower filter housing member at a junction between said first and second lower side surfaces and said first and second upper side surfaces, respectively, to thereby define an internal filter cavity;
- and
- a circuit board positioned within said filter cavity and having a ground terminal fastened to said ground post without the use of solder.
1 more element
The electrical signal filter of claim l, wherein said ground post is cast as part of said lower filter housing member.
An electrical signal filter, comprising:
- an elongate lower filter housing member extending along a first longitudinal direction from a first end thereof to an opposed second end thereof, and having an inner surface and an outer surface, said inner surface terminating at first and second upper side surfaces that extend from said first end to said second end, said elongate lower filter housing member further comprising a first mechanical engagement member extending circumferentially around portions of said outer surface proximate said first and second ends thereof;
- an elongate upper filter housing member extending along said first longitudinal direction from a first end thereof to an opposed second end thereof, and having an inner surface and an outer surface, said inner surface terminating at first and second lower side surfaces that extend from said first end to said second end, said elongate upper filter housing member abutting said elongate lower filter housing member at a junction between said first and second lower side surfaces and said first and second upper side surfaces, respectively, to thereby define an internal filter cavity, said elongate upper filter housing member further comprising a first mechanical engagement member extending circumferentially around portions of said outer surface proximate said first and second ends thereof;
- a one-piece circuit board positioned in said internal filter cavity;
- and
- end caps positioned on said first and second ends of the abutted upper and lower filter housing members, each of said end caps having a second mechanical engagement member formed on an inner surface thereof that is complementary to and mates with the first mechanical engagement members formed on said upper and lower filter housing members.
2 more elements
An electrical signal filter, comprising:
- an elongate lower filter housing member extending along a first longitudinal direction from a first end thereof to an opposed second end thereof, and having an inner surface terminating at first and second upper side surfaces that extend from said first end to said second end;
- a ground post formed integrally with said lower filter housing member and extending upwardly from said inner surface thereof in a direction substantially perpendicular to said first longitudinal direction;
- a first mechanical engagement member extending circumferentially around portions of said outer surface of said lower filter housing member proximate said first and second ends thereof;
- an elongate upper filter housing member extending along said first longitudinal direction from a first end thereof to an opposed second end thereof, and having an inner surface terminating at first and second lower side surfaces that extend from said first end to said second end, said elongate upper filter housing member abutting said elongate lower filter housing member at a junction between said first and second lower side surfaces and said first and second upper side surfaces, respectively, to thereby define an internal filter cavity;
- a first mechanical engagement member extending circumferentially around portions of said outer surface of said upper filter housing member proximate said first and second ends thereof;
- a circuit board positioned within said filter cavity and having a ground terminal fastened to said ground post without the use of solder;
- and
- end caps positioned on said first and second ends of the abutted upper and lower filter housing members, each of said end caps having a second mechanical engagement member formed on an inner surface thereof that is complementary to and mates with the first mechanical engagement members formed on said upper and lower filter housing members.
5 more elements
Dependencies are inferred from the claim text.