Static structures (e.g. – buildings) – Framing to receive door – doorjamb – or window sash – Wall with plural portals
Patent
1981-09-30
1984-05-29
Perham, Alfred C.
Static structures (e.g., buildings)
Framing to receive door, doorjamb, or window sash
Wall with plural portals
52202, 52208, 523091, 5230913, 5230916, 52455, 52656, 52657, 52787, 52788, 244120, B64C 114, E06B 320, E06B 326, B31D 302
Patent
active
044506619
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The use of reinforced plastics in composite structures has been increasing rapidly in the aircraft industry due to the high strength to weight ratio of the composite. The composites often must be tied by mechanical fasteners in order to transfer loads from the composite to metallic structures. These fasteners weaken the structure and add weight and increase manufacturing costs.
It was found that a composite structure window belt could be made that has all but eliminated the need for fasteners.
SUMMARY OF THE INVENTION
Reinforced plastic window frames have an essentially diamond-shaped window opening. The window frame has a flange extending into the opening adjacent the outside of the window and an outwardly extending flange having a series of reinforcements for receiving glass retainers adjacent the inside of the window. The window frames are placed in a line with honeycomb core between and around the frames. A reinforced plastic covering is placed above and below the window frames and the core material and cured into a composite structure window belt.
DESCRIPTION OF THE DRAWINGS
FIG. 1 shows a fragmented plan view of a window belt of this invention.
FIG. 2 shows a section taken along line 2--2 of FIG. 1.
FIG. 3 shows an exploded perspective view of the window frame shown as part of FIG. 1.
FIG. 4 shows a perspective view of the window frame of FIG. 1 with the parts joined together, mounted on a mandrel, and filaments being wound around the frame.
FIG. 5 shows a fragmented perspective view of a section of the window frame with fibers wound around it as in FIG. 4.
FIG. 6 shows a similar fragmented perspective view of a section of the window frame with an additional reinforcement with fibers wound around it.
FIG. 7 shows a cross section taken along the line 7--7 of FIG. 8.
FIG. 8 shows a cross section taken along the line 8--8 of FIG. 1.
FIG. 9 shows a cross section with window taken along the line 9--9 of FIG. 1.
FIG. 10 shows a perspective view showing the window belt being formed and cured.
FIG. 11 shows a plan view of a section of window belt with a different embodiment for the window frame.
FIG. 12 shows a cross section taken along the line 12--12 of FIG. 11.
FIG. 13 shows a cross section taken along the line 13--13 of FIG. 11.
DETAILED DESCRIPTION
A composite structure window belt 10 is made up of a series of reinforced plastic window frames 12, honeycomb core material 14, an inner reinforced plastic cover 16 and an outer reinforced plastic cover 18. Each window frame, as is best shown in FIGS. 3 through 9, is made up of molded reinforced plastic parts 20, 22, 24 and 26. These parts are molded from any of the known reinforced plastics with graphite filaments and epoxy resin the preferred combination. The ends of the parts are formed to mate with each other. See FIGS. 7 and 8 where overlapping enlargement 28, part 26, mates with end 30 of part 20. This meeting is typical of all the ends of the parts. The parts are mated together, secured on mandrel 32 with fasteners 34, the mandrel rotated and a graphite filament 36 wound around the outer periphery of the window frame and built up into a reinforcing film 38. The filament is distributed from a dispenser 40 mounted to move back and forth on a monorail 42. The filament may have a coating of resin, or a resin may be applied to the built-up film. The parts when combined have a diamond-shaped window opening 44. All of the parts have a flange 46 that is tapered inwardly toward the window opening, and all have a pair of legs 48 and 50 that extend outward in a U shape. These legs have recesses 52 and 54 that are sized to accept and mate with ends of a cover plate 56. That cover plate is placed into the ends of the U-shaped legs and a layer of reinforcing filaments 58 in a resin is laid up on the outer surface. On the leg 50, which is furthest from the inwardly directed flange 46, there are a series of reinforcements 60.
The formed window frames 12 are spaced apart and placed in a line. Honeycomb core 14 is placed between and
REFERENCES:
patent: 2504204 (1950-04-01), Kiefer
patent: 2767443 (1956-10-01), Hofein et al.
patent: 2989787 (1961-06-01), Smith
patent: 3356403 (1967-12-01), Sak et al.
patent: 3429530 (1969-02-01), Hertel
Case Morris A.
Donahue B. A.
Perham Alfred C.
The Boeing Company
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