US4719993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control apparatus for elevator
Assignee: Mitsubishi Electric Corp
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Filing: 1987-03-05
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Granted: 1988-01-19
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Expires: 2007-03-05
Abstract
Abstract In a case where peculiar control information which differs depending upon buildings is revised, a first memory for storing the revised information and a second memory for storing the original information before the revision are disposed, and addresses and contents are correspondingly stored in both the memories, whereupon the stored contents of both the memories are displayed on a display unit at the respectively corresponding addresses. Thus, the presence or absence of an alteration error in the case of the revision of the control information can be reliably checked.
Inventors
- 👤 Hideyo Ujihara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:31
CPC Classifications
B; B66; B66B; B66B1/00; B66B1/24; B66B1/28; B66B1/02; B66B1/06; B66B1/14; B66B1/18
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
177 words
In an elevator which is installed in a building and which is controlled by control means constructed of an electronic computer that has a memory storing information for control; a control apparatus for an elevator comprising: (a) first storage means to store control information items which are peculiar to the building and which might be revised, at a plurality of separate addresses, so that when any of the control information items is revised, the stored content at the address corresponding to the information item is revised and stored, whereupon the stored contents of said first storage means including the revised information item are used for the elevator control, (b) second control means to store the control information items at a plurality of separate addresses corresponding to the addresses of said first storage means, these information items being left unrevised, so that the original control information items before being revised are normally stored in said second storage means, and (c) display means to display the contents of said first and second storage means at the respectively corresponding addresses.
Claim 2
Dependent Claim
177 words
In an elevator which is installed in a building and which is controlled by control means constructed of an electronic computer that has a memory storing information for control; a control apparatus for an elevator comprising: (a) first storage means to store control information items which are peculiar to the building and which might be revised, at a plurality of separate addresses, so that when any of the control information items is revised, the stored content at the address corresponding to the information item is revised and stored, whereupon the stored contents of said first storage means including the revised information item are used for the elevator control, (b) second control means to store the control information items at a plurality of separate addresses corresponding to the addresses of said first storage means, these information items being left unrevised, so that the original control information items before being revised are normally stored in said second storage means, and (c) display means to display the contents of said first and second storage means at the respectively corresponding addresses.
Claim 3
Dependent Claim
78 words
A control apparatus for an elevator as defined in claim 1, wherein both said first storage means and said second storage means store the identical control information items at the respectively corresponding addresses in an intial state of the elevator control, and central processing means is further comprise to perform a control under which, when any of the control information items is revised, only said first storage means stores the revised control information item at the corresponding address.
Claim 4
Dependent Claim
73 words
A control apparatus for an elevator as defined in claim 1, further comprising comparison means to compare the stored contents of said first storage means and said second storage means at the respectively corresponding addresses and to provide an output when the stored contents are discrepant from each other, so that said display means displays the discrepant stored contents of both said storage means in response to the output of said comparison means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-01-18 | 1991-07-20 | 1992-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-18 | 1995-07-20 | 1996-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-18 | 1999-07-20 | 2000-01-19 | $7700.00 | Window Closed / Lapsed |