Patent US4882778A successfully refreshed from Google Patents.
US4882778A
Expired / Lapsed
US
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Electronic load drive control apparatus
Assignee: Canon Inc
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Filing: 1989-02-27
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Granted: 1989-11-21
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Expires: 2009-02-27
Abstract
Abstract There is disclosed a novel control system in an electronic apparatus such as a copier, in which intelligent registers are provided in addition to the microprocessor and execute control under predetermined conditions. The microprocessor interferes with the execution of control by the registers only when the conditions become aberrated from the predetermined value, and is therefore used for other tasks.
Inventors
- 👤 Masao Hosaka
- 👤 Yoshitaka Ogino
- 👤 Kazutoshi Shimada
- 👤 Takashi Saito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:45
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/50; G03G21/00; G03G21/14; G05; G05B; G05B19/00; G05B19/02; G05B19/04; G05B19/042; G05B19/0421; G05B19/18; G05B19/414; G05B19/4142
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
201 words
An electric load drive control apparatus comprising: an electric load; drive means for driving said load; control means for controlling said drive means by means of hardware; a central processing unit for executing programs for controlling said control means and processing a task different from the control of said control means, said central processing unit providing control data for controlling said drive means to said control means before starting of control of said drive means by said control means; and detecting means for detecting a drive condition of said load; wherein said control means controls said drive means, independently of said central processing unit, in response to the operation of said detecting means so that the drive direction of said load is regulated in a desired manner corresponding to the control data, and wherein said control means produce a signal for requesting said central processing unit to control said control means when said detecting means detects that the drive condition of said load departs from a control range corresponding to the control data, and controls said drive means on the basis of new control data transmitted from said central processing unit in response to the signal produced by said control means.
Claim 2
Dependent Claim
201 words
An electric load drive control apparatus comprising: an electric load; drive means for driving said load; control means for controlling said drive means by means of hardware; a central processing unit for executing programs for controlling said control means and processing a task different from the control of said control means, said central processing unit providing control data for controlling said drive means to said control means before starting of control of said drive means by said control means; and detecting means for detecting a drive condition of said load; wherein said control means controls said drive means, independently of said central processing unit, in response to the operation of said detecting means so that the drive direction of said load is regulated in a desired manner corresponding to the control data, and wherein said control means produce a signal for requesting said central processing unit to control said control means when said detecting means detects that the drive condition of said load departs from a control range corresponding to the control data, and controls said drive means on the basis of new control data transmitted from said central processing unit in response to the signal produced by said control means.
Claim 3
Dependent Claim
28 words
An apparatus according to claim 1, wherein said central processing unit interrupts an executing program and controls said control means when said unit receives the control request signal.
Claim 4
Dependent Claim
21 words
An apparatus according to claim 2, wherein said central processing unit has an interrupt port for receiving the control request signal.
Claim 5
Dependent Claim
18 words
An apparatus according to claim 1, wherein said central processing unit and said control means are integrally constituted.
Claim 6
Dependent Claim
12 words
An apparatus according to claim 1, wherein said load is a motor.
Claim 7
Dependent Claim
16 words
An apparatus according to claim 5, wherein said motor drives a reciprocating member for image formation.
Claim 8
Dependent Claim
16 words
An apparatus according to claim 5, wherein said motor drives a rotating member for image formation.
Claim 9
Dependent Claim
17 words
An apparatus according to claim 5, wherein said detecting means detects a driving speed of said motor.
Claim 10
Dependent Claim
26 words
An apparatus according to claim 1, wherein said central processing unit provides data associated with a control range of said drive means to said control means.
Claim 11
Dependent Claim
26 words
An apparatus according to claim 1, wherein said load is a heat emitting device and said control means controls said drive means to regulate the temperature.
Claim 12
Dependent Claim
31 words
An apparatus according to claim 1, wherein said central processing unit interrupts control of said control means and processes the task while the drive condition is regulated in the desired condition.
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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) | 1992-11-20 | 1993-05-22 | 1993-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-20 | 1997-05-22 | 1997-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-20 | 2001-05-22 | 2001-11-21 | $7700.00 | Window Closed / Lapsed |