US3940635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-damping circuit
Assignee: Baldwin Piano and Organ Co
•
Filing: 1974-08-29
•
Granted: 1976-02-24
•
Expires: 1994-08-29
Abstract
Abstract A Zimbelstern system or sequential bell ringing system in which a sequential counter actuates a set of self-damping circuits in a predetermined repeating sequence, the self-damping circuits each enabling a different set of sinusoidal tone sources in such relative amplitudes and with such relative rise and decay envelopes as to simulate the sounds of sequentially sounding bells when electro-acoustically reproduced.
Inventors
- 👤 Albert Meyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:06
CPC Classifications
G; G10; G10H; G10H1/00; G10H1/18; G10H1/26; G10H2230/00; G10H2230/045; G10H2230/251; G10H2230/351
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
142 words
A self-decay circuit, including a source of a dc voltage pulse, a resistance (Rk) connected across said source, a series circuit consisting of a first resistance (Rs) and a first capacitance (C1), a first diode (D2) poled to the conductive to said dc voltage pulse, a partial circuit consisting of a second resistance (Ra) and a second capacitance (C2), means connecting said series circuit, said first diode and said parallel circuit all in series in the order stated across said resistance (Rk), and a second diode connected in a series circuit and poled to discharge said first capacitance after termination of said dc voltage pulse, said first diode being poled to be conductive of current in response to said dc voltage pulse, said first and second resistances Rs and Ra being the sole resistances connected in series with said first capacitance (C1).
Claim 2
Dependent Claim
142 words
A self-decay circuit, including a source of a dc voltage pulse, a resistance (Rk) connected across said source, a series circuit consisting of a first resistance (Rs) and a first capacitance (C1), a first diode (D2) poled to the conductive to said dc voltage pulse, a partial circuit consisting of a second resistance (Ra) and a second capacitance (C2), means connecting said series circuit, said first diode and said parallel circuit all in series in the order stated across said resistance (Rk), and a second diode connected in a series circuit and poled to discharge said first capacitance after termination of said dc voltage pulse, said first diode being poled to be conductive of current in response to said dc voltage pulse, said first and second resistances Rs and Ra being the sole resistances connected in series with said first capacitance (C1).
Claim 3
Dependent Claim
36 words
The combination according to claim 1, wherein said first resistance is substantial but relatively small and said second resistance is relatively large, and wherein said first and second capacitances are of the same order of magnitude.
Claim 4
Dependent Claim
133 words
A self-decay circuit, including a source of terminable dc voltage, a resistance (Rk) connected in series across said source of dc voltage, a series circuit consisting of first resistance (Rs) and first capacitance (C1) in series with each other, a first diode (D2), a parallel circuit consisting of second resistance (Ra) and second capacitance (C2), means connecting said series circuit and said first diode and said parallel circuit in the order recited all in a series circuit including said source of dc voltage, and a second diode (D1) connected across said resistance (Rk) and said series circuit taken in series with each other, said second diode being poled to discharge said first capacitance on termination of said dc voltage, said first diode being poled to be conductive in response to said dc voltage.
Claim 5
Dependent Claim
133 words
A self-decay circuit, including a source of terminable dc voltage, a resistance (Rk) connected in series across said source of dc voltage, a series circuit consisting of first resistance (Rs) and first capacitance (C1) in series with each other, a first diode (D2), a parallel circuit consisting of second resistance (Ra) and second capacitance (C2), means connecting said series circuit and said first diode and said parallel circuit in the order recited all in a series circuit including said source of dc voltage, and a second diode (D1) connected across said resistance (Rk) and said series circuit taken in series with each other, said second diode being poled to discharge said first capacitance on termination of said dc voltage, said first diode being poled to be conductive in response to said dc voltage.
Claim 6
Dependent Claim
67 words
The combination according to claim 3, wherein the resistance of said series circuit is substantial but relatively small and the resistance of said parallel circuit is relatively large, said first and second capacitances and said resistances having values establishing a relatively rapid exponential rise and a relatively slow exponential fall across the resistance of said parallel circuit, and wherein said first and second capacitances are substantially equal.
Claim 7
Dependent Claim
21 words
The combination according to claim 4, wherein said source of terminable dc voltage is a source of periodic dc voltage pulses.
Claim 8
Dependent Claim
37 words
The combination according to claim 5, wherein the rise time constant of said self-decay circuit is ##EQU4## and wherein the decay time constant of said self decay circuit is RaC2 in response to each of said pulses.
References Cited (Backward Citations)
US3247306A
Cited
US3417189A
Cited
US3383453A
Cited
US3636801A
Cited
US3848142A
Cited
US3816636A
Cited
US3825668A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-02-23 | 1979-08-25 | 1980-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-23 | 1983-08-25 | 1984-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-23 | 1987-08-25 | 1988-02-24 | $7700.00 | Window Closed / Lapsed |