US3896545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a molded waveguide filter with integral tuning posts
Assignee: Hughes Missile Systems Co
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Filing: 1974-08-05
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Granted: 1975-07-29
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Expires: 1994-08-05
Abstract
Abstract A method for molding a waveguide filter having integral tuning posts.
Inventors
- 👤 William L Macturk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:03
CPC Classifications
H; H01; H01P; H01P11/00; H01P11/007; H01P1/00; H01P1/20; H01P1/207; H01P1/211; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49016
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
133 words
A method of producing a waveguide filter having integral tuning posts comprising the steps of: molding a substantially U-shaped waveguide filter body having integral tuning posts disposed therein, said integral tuning posts being shorter than the walls of said U-shaped waveguide filter body; molding a substantially flat waveguide filter cap for the molded waveguide filter body to substantially close the open end of said substantially U-shaped waveguide filter body; copper plating the waveguide filter body and the waveguide filter cap; gold plating the copper-plated waveguide filter body and the copper-plated waveguide filter cap; assembling the plated waveguide filter cap and the plated waveguide filter body to form the waveguide filter; and providing adjustable metal tuning screws in said waveguide filter cap to extend over the integral tuning posts of said waveguide filter body.
Claim 2
Independent Claim
133 words
A method of producing a waveguide filter having integral tuning posts comprising the steps of: molding a substantially U-shaped waveguide filter body having integral tuning posts disposed therein, said integral tuning posts being shorter than the walls of said U-shaped waveguide filter body; molding a substantially flat waveguide filter cap for the molded waveguide filter body to substantially close the open end of said substantially U-shaped waveguide filter body; copper plating the waveguide filter body and the waveguide filter cap; gold plating the copper-plated waveguide filter body and the copper-plated waveguide filter cap; assembling the plated waveguide filter cap and the plated waveguide filter body to form the waveguide filter; and providing adjustable metal tuning screws in said waveguide filter cap to extend over the integral tuning posts of said waveguide filter body.
Claim 3
Dependent Claim
20 words
The method of claim 1 wherein the waveguide filter body and waveguide filter cap are molded of a plastic material.
Claim 4
Dependent Claim
13 words
The method of claim 2 wherein said plastic matErial is Lustran ABS plastic.
Claim 5
Dependent Claim
23 words
The method of claim 1 wherein said integral tuning posts are approximately 0.015 inches shorter than the wall of said waveguide filter body.
Claim 6
Dependent Claim
20 words
The method of claim 1 wherein the molded waveguide filter cap and body are light vapor honed before copper plating.
Claim 7
Dependent Claim
32 words
The method of claim 5 wherein said waveguide filter cap and body are copper plated to a thickness of 1 mil over an electroless copper deposit of 50 X 10 6 inch.
Claim 8
Dependent Claim
24 words
The method of claim 6 wherein said waveguide filter cap and body are gold plated to a thickness of 75 X 10 6 inch.
Claim 9
Independent Claim
333 words
A method of producing a plastic waveguide filter having integral tuning posts comprising the steps of: assembling a steel mold having a mold cavity for a waveguide filter cap, said cavity being substantially rectangular in form to produce the waveguide cap base and having openings therein to produce input and output posts extending from the waveguide cap base and pins projecting into the cavity to produce a plurality of holes in the waveguide cap base; injection molding a plastic waveguide filter cap in the waveguide filter cap assembled steel mold; disassembling the waveguide filter cap steel mold assembly and removing the molded waveguide filter cap; assembling a steel mold having a substantially U-shaped mold cavity for a waveguide filter body, said mold including an internal mandrel having openings therein for forming integral tuning posts in the substantially U-shaped body and pins projecting into the mold cavity to produce a plurality of holes at the top of the legs of the U-shaped body, said internal mandrel including a thin shim disposed over the integral tuning post forming openings to shorten the height of the tuning posts to less than the height of the walls of the U-shaped body; injection molding a plastic waveguide filter body in the waveguide filter body assembled steel mold; disassembling the waveguide filter body steel mold assembly and removing the molded waveguide filter body; drilling and tapping holes in the waveguide filter body and waveguide filter cap for the assembly thereof; copper plating the molded waveguide filter cap and the molded waveguide filter body; gold plating the copper plated waveguide filter cap and waveguide filter body; assembling the plated waveguide filter cap to the U-shaped waveguide filter body to form a generally U-shaped waveguide filter with the integral tuning posts extending therebetween, the assembly having a gap between the top of the tuning posts and the waveguide filter cap; and providing adjustable metal tuning screws in said waveguide filter cap to extend into the gap over the integral tuning posts.
Claim 10
Independent Claim
333 words
A method of producing a plastic waveguide filter having integral tuning posts comprising the steps of: assembling a steel mold having a mold cavity for a waveguide filter cap, said cavity being substantially rectangular in form to produce the waveguide cap base and having openings therein to produce input and output posts extending from the waveguide cap base and pins projecting into the cavity to produce a plurality of holes in the waveguide cap base; injection molding a plastic waveguide filter cap in the waveguide filter cap assembled steel mold; disassembling the waveguide filter cap steel mold assembly and removing the molded waveguide filter cap; assembling a steel mold having a substantially U-shaped mold cavity for a waveguide filter body, said mold including an internal mandrel having openings therein for forming integral tuning posts in the substantially U-shaped body and pins projecting into the mold cavity to produce a plurality of holes at the top of the legs of the U-shaped body, said internal mandrel including a thin shim disposed over the integral tuning post forming openings to shorten the height of the tuning posts to less than the height of the walls of the U-shaped body; injection molding a plastic waveguide filter body in the waveguide filter body assembled steel mold; disassembling the waveguide filter body steel mold assembly and removing the molded waveguide filter body; drilling and tapping holes in the waveguide filter body and waveguide filter cap for the assembly thereof; copper plating the molded waveguide filter cap and the molded waveguide filter body; gold plating the copper plated waveguide filter cap and waveguide filter body; assembling the plated waveguide filter cap to the U-shaped waveguide filter body to form a generally U-shaped waveguide filter with the integral tuning posts extending therebetween, the assembly having a gap between the top of the tuning posts and the waveguide filter cap; and providing adjustable metal tuning screws in said waveguide filter cap to extend into the gap over the integral tuning posts.
Claim 11
Dependent Claim
25 words
The method of claim 8 wherein the gap between the top of the integral tuning posts and the waveguide filter cap is approximately 0.015 inches.
Claim 12
Dependent Claim
20 words
The method of claim 8 wherein the molded waveguide filter cap and body are light vapor honed before copper plating.
Claim 13
Dependent Claim
32 words
The method of claim 8 wherein said waveguide filter cap and body are copper plated to a thickness of 1 mil over an electroless copper deposit of 50 X 10 6 inch.
Claim 14
Dependent Claim
24 words
The method of claim 11 wherein said waveguide filter cap and body are gold plated to a thickness of 75 X 10 6 inch.
Claim 15
Dependent Claim
26 words
The method of claim 8 wherein input and output connectors are electrically connected to the input and output posts through the base of the U-shaped body.
Claim 16
Dependent Claim
109 words
The method of claim 8 wherein said waveguide filter cap steel mold assembly comprises; a substantially rectangular mold body having input and output post openings and a plurality of mounting holes extending from the interior surface thereof; a central plate having a rectangular opening therein forming a mold cavity communicating with the input and output post openings in said mold body and having mounting holes aligned with the mounting holes of said mold boDy; and a cover plate having mounting pins aligned with and projecting through the central plate mounting holes and into the mold body mounting holes and having a plurality of pins projecting into the mold cavity.
Claim 17
Dependent Claim
146 words
The method of claim 8 wherein said waveguide filter body steel mold assembly comprises: a substantially rectangular mold body having an elongated central slot and a plurality of mounting holes on the ends and top thereof; an internal mandrel disposed in the elongated central slot of said mold body to form a generally U-shaped mold cavity therewith, said mandrel having mounting openings at both ends thereof and a plurality of tuning post openings therethrough; a flat shim disposed over the tuning post openings of said internal mandre; a pair of end plates disposed at either end of said mold body and internal mandrel and having mounting pins to project into the end mounting openings thereof; and a cover plate disposed over the top of the mold body, mandrel, and end plates and having mounting pins to project into the top mounting openings of the mold body.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-28 | 1979-01-27 | 1979-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-28 | 1983-01-27 | 1983-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-28 | 1987-01-27 | 1987-07-29 | $7700.00 | Window Closed / Lapsed |