Noise and burglar preventive door and window apparatus

Details Noise and burglar preventive door and window apparatus Noise and burglar preventive door and window apparatus

1987-06-02

1988-12-20

Bell, J. Karl

Static structures (e.g., buildings)

Viewing port for specific environment

52304, 52789, 49449, E06B 900, E06B 712

Patent

active

047917628

ABSTRACT:
A door and window apparatus includes a pair of longitudinal frames, a pair of transverse frames, two glass sheets respectively disposed among the longitudinal and transverse frames defining a vacuum chamber for minimizing sound-wave transmission and preventing noise pollution, and a reinforcing grating intermediately fixed in between the two glass sheets serving as an internal barrier to exclude any intruder through the door or window for security purpose.

REFERENCES:
patent: 2756467 (1956-07-01), Etling
patent: 3305623 (1967-02-01), Bakker et al.
patent: 3307316 (1967-03-01), Gray
patent: 3990201 (1976-11-01), Falbel
patent: 4035539 (1977-07-01), Luboshez
patent: 4341043 (1982-07-01), Yamamoto et al.
patent: 4576502 (1986-03-01), Bancroft
patent: 4604840 (1986-08-01), Mondon
patent: 4640048 (1987-02-01), Winner et al.
patent: 4652472 (1987-03-01), Davies
patent: 4689933 (1987-09-01), Biro

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