Musical door chime preferably also combined with a clock for ann

Details Musical door chime preferably also combined with a clock for ann Musical door chime preferably also combined with a clock for ann

1979-12-04

1982-04-20

Miska, Vit W.

Horology: time measuring systems or devices

Combined with disparate device

368273, 340384E, 84 101, 84 103, G04B 4700, G04B 2100, G08B 300, G10F 100

Patent

active

043262767

ABSTRACT:
A musical door chime which includes a repertoire of musical tunes one of which is played when a door pushbutton, preferably the front door pushbutton, is actuated. The musical tune which is played may be selected by means of a keyboard connected to a microprocessor. Digitally encoded representations of the notes of each musical tune are stored in a memory. Each digitally encoded musical note is read from memory by the microprocessor and converted by the microprocessor into a squarewave having the frequency and the duration of the note. The microprocessor is connected to a note strike and decay circuit which is preferably connected in series with an active audio filter circuit for translating the squarewave into a sinusoidal output for energizing a loudspeaker so that relatively high quality audible tones are heard when the musical tune is played. Preferably, a two-note musical tune is played when a rear door pushbutton is actuated, and a fixed single musical note is played when a side door pushbutton is actuated. The musical door chime is preferably also combined with a visual display driven by the microprocessor for indicating the time of day. The time is preferably annunciated every quarter hour by means of musical notes. A multi-frequency tone is played for the hour strike. The keyboard serves various other control functions in addition to selecting the musical tune to be played.

REFERENCES:
patent: 1831552 (1931-11-01), Bossard
patent: 1957877 (1934-05-01), Young
patent: 2717996 (1955-09-01), Rittenhouse
patent: 3515792 (1970-06-01), Deutsch
patent: 3878750 (1975-04-01), Kapps
patent: 3910150 (1975-10-01), Deutsch et al.
patent: 4010667 (1977-03-01), Kniepkamp
patent: 4012702 (1977-03-01), Weber
patent: 4043240 (1977-08-01), Ando
patent: 4055843 (1977-10-01), Whitaker
patent: 4073133 (1978-02-01), Earls et al.
patent: 4090349 (1978-05-01), Takase
patent: 4101885 (1978-07-01), Blum
patent: 4110750 (1978-08-01), Hetling et al.
patent: 4250496 (1981-02-01), Southgate
patent: 4258358 (1981-03-01), Lee et al.
"A Sampling of Techniques for Computer Performance of Music", Hal Chamberlin, Byte Magazine, Sep. 1977, pp. 62-66, 68-70, 72, 74, 76, 77-80, 82-83.

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