US3556256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elevator false car call cancellation control
Assignee: Reliance Electric Co
•
Filing: 1969-04-25
•
Granted: 1971-01-19
•
Expires: 1989-04-25
Abstract
Abstract False car call registrations as by the registration of successive calls at a rapid rate by sweeping a hand across the array of call buttons in a car operating panel are sensed as a rate at which the calls are registered exceeding a preset level. When such rate is sensed, the car calls are automatically canceled.
Inventors
- 👤 Gordon P Sprague
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:50
CPC Classifications
B; B66; B66B; B66B1/00; B66B1/02; B66B1/06; B66B1/14
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
61 words
An elevator control comprising a plurality of switch means for registering calls for service, means for canceling registered calls for service, means for sensing the rate of registration of calls, and means responsive to registration of calls at a rate in excess of a predetermined level for canceling a plurality of registered calls including the calls registered at said excessive rate.
Claim 2
Dependent Claim
61 words
An elevator control comprising a plurality of switch means for registering calls for service, means for canceling registered calls for service, means for sensing the rate of registration of calls, and means responsive to registration of calls at a rate in excess of a predetermined level for canceling a plurality of registered calls including the calls registered at said excessive rate.
Claim 3
Dependent Claim
34 words
A control according to claim 1 wherein said switch means are for calls registered from within an elevator car and said canceling means is effective to cancel all calls registered by said switch means.
Claim 4
Dependent Claim
34 words
A control according to claim 1 including means to maintain said canceling means effective for a time interval following the response thereof to the excessive rate of registrations in excess of the predetermined level.
Claim 5
Dependent Claim
95 words
An elevator control comprising a plurality of car call registration means available to passengers within an elevator car, a voltage divider comprising a first and second resistance, means responsive to the registration of each car call by said registration means to insert a resistance in parallel with said first resistance, means connected in parallel with said second resistance for developing a signal which changes with time in response to the change of resistance paralleling said first resistance, means responsive to a critical value of said time dependent signal to disable said car call registration means.
Claim 6
Dependent Claim
95 words
An elevator control comprising a plurality of car call registration means available to passengers within an elevator car, a voltage divider comprising a first and second resistance, means responsive to the registration of each car call by said registration means to insert a resistance in parallel with said first resistance, means connected in parallel with said second resistance for developing a signal which changes with time in response to the change of resistance paralleling said first resistance, means responsive to a critical value of said time dependent signal to disable said car call registration means.
Claim 7
Dependent Claim
40 words
A combinatIon according to claim 4 wherein said means in parallel with said second resistance includes a capacitance, and said means responsive to the critical value of the time dependent signal is responsive to the charging current for said capacitance.
Claim 8
Dependent Claim
38 words
A combination according to claim 5 including a unidirectional conductive device in parallel with said current responsive means poled to pass discharge current from said capacitance whereby said discharge current effect on said current responsive means is reduced.
Claim 9
Dependent Claim
43 words
A combination according to claim 5 including means responsive to said current responsive means disconnects said second resistance from said voltage divider whereby said first resistance is connected in series with said capacitance to impose a voltage thereacross and continue charging said condenser.
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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |