US4376930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Call signal conversion apparatus for elevator system
Assignee: Mitsubishi Electric Corp
•
Filing: 1981-01-26
•
Granted: 1983-03-15
•
Expires: 2001-01-26
Abstract
Abstract A call signal conversion apparatus for an elevator system comprises a call button device as a serial connection of a call button and a call registration lamp; a control device as a computer for inputting a call signal given by actuation of the call button, registering the calling and outputting the call registration signal; and a signal conversion circuit connected between the button device and the control device. The signal conversion circuit comprises a call detection circuit for detecting the call signal; a waveform shaper circuit which shapes the call signal to output the signal to the control circuit; a memory circuit for memorizing the call signal or the call registration signal; and a driving circuit for outputting the signal for turning on or off the call registration lamp by detecting the output of the memory circuit.
Inventors
- 👤 Isao Sasao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:30
CPC Classifications
B; B66; B66B; B66B1/00; B66B1/34; B66B1/46; B66B1/468
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
180 words
In a call signal conversion apparatus for an elevator system which comprises a call button device as a serial connection of a call button and a call registration lamp; a control device as a computer for inputting a call signal given by actuation of the call button, registering the calling and outputting a call registration signal; and a signal conversion circuit connected between said button device and said control device an improvement characterized in that said signal conversion circuit comprises a call detection circuit for detecting said call signal; a waveform shaper circuit which shapes said call signal to output the signal to said control device; a memory circuit having an input coupled to the control device for memorizing said call signal or said call registration signal from the control device; and a driving circuit for outputting a signal for turning on or off said call registration lamp by detecting an output of said memory circuit and for supplying a signal equivalent to said call signal to said control device through said call detection circuit and said waveform shaper circuit.
Claim 2
Dependent Claim
180 words
In a call signal conversion apparatus for an elevator system which comprises a call button device as a serial connection of a call button and a call registration lamp; a control device as a computer for inputting a call signal given by actuation of the call button, registering the calling and outputting a call registration signal; and a signal conversion circuit connected between said button device and said control device an improvement characterized in that said signal conversion circuit comprises a call detection circuit for detecting said call signal; a waveform shaper circuit which shapes said call signal to output the signal to said control device; a memory circuit having an input coupled to the control device for memorizing said call signal or said call registration signal from the control device; and a driving circuit for outputting a signal for turning on or off said call registration lamp by detecting an output of said memory circuit and for supplying a signal equivalent to said call signal to said control device through said call detection circuit and said waveform shaper circuit.
Claim 3
Dependent Claim
20 words
The call signal conversion apparatus according to claim 1 wherein said memory circuit is actuated by said waveform shaper circuit.
Claim 4
Dependent Claim
20 words
The call signal conversion apparatus according to claim 1 wherein said call detection circuit has an emitter earthing amplifying circuit.
Claim 5
Dependent Claim
20 words
The call signal conversion apparatus according to claim 1 wherein said waveform shaper circuit has a collector earthing amplifying circuit.
Claim 6
Dependent Claim
17 words
The call signal conversion apparatus according to claim 1 wherein said memory circuit is a flip-flop circuit.
Claim 7
Dependent Claim
20 words
The call signal conversion apparatus according to claim 1, wherein said call detection circuit has a collector earthing amplifying circuit.
Claim 8
Dependent Claim
20 words
The call signal conversion apparatus according to claim 1, wherein said waveform shaper circuit has an emitter earthing amplifying circuit.
References Cited (Backward Citations)
US3967700A
Cited
US4120381A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-03-14 | 1986-09-13 | 1987-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-14 | 1990-09-13 | 1991-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-14 | 1994-09-13 | 1995-03-15 | $7700.00 | Window Closed / Lapsed |