US3913097A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound simulator for model steam engine
Assignee: Individual
•
Filing: 1974-09-03
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Granted: 1975-10-14
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Expires: 1994-09-03
Abstract
Abstract A simulator for mounting in a model steam train engine and adapted to emit sounds representative of a regular steam-driven train engine.
Inventors
- 👤 Walter J Schedler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:04
CPC Classifications
G; G10; G10K; G10K15/00; G10K15/02; A; A63; A63H; A63H19/00; A63H19/02; A63H19/14; G06; G06G; G06G7/00; G06G7/48; G06G7/64; G08; G08B; G08B3/00; G08B3/10; A63F; A63F9/00; A63F9/24; A63F2009/2448; A63F2009/247; A63F2009/2473
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
216 words
A sound generation system for a multi-wheeled model steam engine operating at a speed determined by the magnitude of electric power received from a controller, said system comprising: an electronic circuit for generating a constant white noise signal representing a steam sound; a switch electrically connected to receive electric power from the engine and including an actuator for turning the switch on momentarily at a rate responsive to the operating speed of the engine; a full wave rectifier connected to receive electric current from the switch; an amplifier having power terminals connected to receive electric power from the rectifier for providing an output signal responsive to the magnitude of the power received and synchronously with the closing of the switch, said amplifier also having signal input terminals connected to receive said white noise signal; a capacitor connected across the power input terminals of the amplifier to filter and smooth out the power signal when any brief interruptions occur due primarily to the controller regulation and electrical connections between the engine and power source being momentarily broken; a sound speaker connected to receive the amplifier output signal with such signal being the amplified white noise signal representing escaping steam occurring synchronously with the operating speed of the engine to simulate the actual sound of a steam engine.
Claim 2
Dependent Claim
216 words
A sound generation system for a multi-wheeled model steam engine operating at a speed determined by the magnitude of electric power received from a controller, said system comprising: an electronic circuit for generating a constant white noise signal representing a steam sound; a switch electrically connected to receive electric power from the engine and including an actuator for turning the switch on momentarily at a rate responsive to the operating speed of the engine; a full wave rectifier connected to receive electric current from the switch; an amplifier having power terminals connected to receive electric power from the rectifier for providing an output signal responsive to the magnitude of the power received and synchronously with the closing of the switch, said amplifier also having signal input terminals connected to receive said white noise signal; a capacitor connected across the power input terminals of the amplifier to filter and smooth out the power signal when any brief interruptions occur due primarily to the controller regulation and electrical connections between the engine and power source being momentarily broken; a sound speaker connected to receive the amplifier output signal with such signal being the amplified white noise signal representing escaping steam occurring synchronously with the operating speed of the engine to simulate the actual sound of a steam engine.
Claim 3
Dependent Claim
32 words
A sound generation systEm for a model steam engine as defined in claim 1, wherein said switch actuator turns the switch on momentarily a multiplicity of times for each engine wheel revolution.
Claim 4
Dependent Claim
55 words
A sound generation system for a model steam engine as defined in claim 1, wherein the magnitude of the electric power received from the engine is directly proportioned to the power supplied to the engine by the controller thereby regulating the magnitude of the amplifier output signal proportional to the operating speed of the engine.
Claim 5
Dependent Claim
212 words
A sound generation system for a model steam turbine engine operating at a speed determined by the magnitude of the electric power received from a controller, said system comprising: a first electronic circuit having signal output terminals for supplying a constant white noise signal representing a steam sound, a second electronic circuit for generating a turbine sound signal at the output terminals having a frequency dependent upon the power supplied to the power terminals thereof; a full wave rectifier electrically connected to receive electrical power from the engine; an amplifier having power input terminals and adapted to amplify and supply at output terminals a signal received at signal input terminals having a loudness responsive to power received at the power terminals; first circuit means connecting the rectifier with the second electronic circuit power terminals and the amplifier power terminals; second circuit means connecting the first circuit output terminals, the second circuit output terminals and the amplifier signal input terminals to supply the white noise and turbine sound signals to the amplifier; and a sound speaker connected to receive and broadcast the amplifier output terminal signal whereby the turbine sound will be simulated by the second electronic circuit signal and the steam exhaust signal will be simulated by the first electronic circuit signal.
Claim 6
Dependent Claim
212 words
A sound generation system for a model steam turbine engine operating at a speed determined by the magnitude of the electric power received from a controller, said system comprising: a first electronic circuit having signal output terminals for supplying a constant white noise signal representing a steam sound, a second electronic circuit for generating a turbine sound signal at the output terminals having a frequency dependent upon the power supplied to the power terminals thereof; a full wave rectifier electrically connected to receive electrical power from the engine; an amplifier having power input terminals and adapted to amplify and supply at output terminals a signal received at signal input terminals having a loudness responsive to power received at the power terminals; first circuit means connecting the rectifier with the second electronic circuit power terminals and the amplifier power terminals; second circuit means connecting the first circuit output terminals, the second circuit output terminals and the amplifier signal input terminals to supply the white noise and turbine sound signals to the amplifier; and a sound speaker connected to receive and broadcast the amplifier output terminal signal whereby the turbine sound will be simulated by the second electronic circuit signal and the steam exhaust signal will be simulated by the first electronic circuit signal.
Claim 7
Dependent Claim
24 words
A sound generation system as defined in claim 4, including means to adjust the relative amplitudes of the white noise and turbine sound signals.
Claim 8
Dependent Claim
29 words
A sound generation system as defined in claim 5, including a capacitor connected across the power input terminal of the amplifier to filter and smooth out the power signal.
Claim 9
Dependent Claim
41 words
A sound generation system as defined in claim 6, including a capacitor connected across the power input terminals of the second electronic circuit to filter the power signal supplied thereto and stabilize the frequency of the turbine sound signal supplied thereby.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-13 | 1979-04-14 | 1979-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-13 | 1983-04-14 | 1983-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-13 | 1987-04-14 | 1987-10-14 | $7700.00 | Window Closed / Lapsed |