Music – Instruments
Patent
1981-12-24
1983-11-15
Miska, Vit W.
Music
Instruments
84 126, G10H 300, G10H 102
Patent
active
044148771
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.
REFERENCES:
patent: 4010667 (1977-03-01), Kmepkamp
patent: 4014238 (1977-03-01), Southard
patent: 4161128 (1979-07-01), Yamada et al.
Miska Vit W.
Scovill Inc.
LandOfFree
Musical door chime preferably also combined with a clock for ann does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Musical door chime preferably also combined with a clock for ann, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Musical door chime preferably also combined with a clock for ann will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-154248