US4603957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switch state detecting apparatus for a camera
Assignee: Canon Inc
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Filing: 1985-02-13
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Granted: 1986-08-05
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Expires: 2005-02-13
Abstract
Abstract A detecting apparatus for detecting the state of switch means operatively associated with the release operation or the like is disclosed. The cycle of sampling pulse for detecting the state of the switch to be applied to the switch means when the use of the photographing apparatus is selected by operation means is made shorter than that when the non-use of the photographing apparatus is selected. The power consumption due to the application of the sampling pulses in case the detection of the switch detection is not necessary is prevented, while the change of the state of the switch means can be detected efficiently when the detection of the switch state is necessary.
Inventors
- 👤 Nobuyuki Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:05
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/26
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
119 words
A photographing apparatus comprising: (a) an operation member for selecting use or non-use of the photographing apparatus; (b) switch means which changes its switch state in accordance with an operation of the photographing apparatus other than the operation of the photographing apparatus whose use or non-use of the photographing apparatus is selected by the operation member; (c) a detecting circuit for delivering an electrical signal for detecting the state of the switch so as to detect the state of the switch means; and (d) a control circuit for making the delivery per unit time of the electrical signal from the detecting circuit when the use of the photographing apparatus is selected different from that when the non-use is selected.
Claim 2
Dependent Claim
119 words
A photographing apparatus comprising: (a) an operation member for selecting use or non-use of the photographing apparatus; (b) switch means which changes its switch state in accordance with an operation of the photographing apparatus other than the operation of the photographing apparatus whose use or non-use of the photographing apparatus is selected by the operation member; (c) a detecting circuit for delivering an electrical signal for detecting the state of the switch so as to detect the state of the switch means; and (d) a control circuit for making the delivery per unit time of the electrical signal from the detecting circuit when the use of the photographing apparatus is selected different from that when the non-use is selected.
Claim 3
Dependent Claim
44 words
A photographing apparatus according to claim 1, wherein the control circuit controls the delivery per unit time of the electrical signal when the use of the photographing apparatus is selected to be larger than that when the non-use of the photographing apparatus is selected.
Claim 4
Dependent Claim
52 words
A photographing apparatus according to claim 1 or 2, wherein the control circuit delivers the electrical signal in pulse in such a manner that the delivery cycle of the pulse when the use of the photographing apparatus is selected is shorter than that when the non-use of the photographing apparatus is selected.
Claim 5
Dependent Claim
139 words
A photographing apparatus comprising: (a) first switch means having a first switch state and a second switch state; (b) second switch means having a first switch state and a second switch state; (c) a detecting circuit for detecting the state of the second switch means, said circuit detecting the state of the second switch means by delivering an electrical signal; (d) a control circuit for making the delivery per unit time of the electrical signal when the first switch assumes the first switch state different from that when the first switch means assumes the second switch state; and (e) a circuit which operates when it is detected by the detecting circuit that the second switch means has been changed over from the first to the second switch state in case the first switch means is in the second state.
Claim 6
Dependent Claim
139 words
A photographing apparatus comprising: (a) first switch means having a first switch state and a second switch state; (b) second switch means having a first switch state and a second switch state; (c) a detecting circuit for detecting the state of the second switch means, said circuit detecting the state of the second switch means by delivering an electrical signal; (d) a control circuit for making the delivery per unit time of the electrical signal when the first switch assumes the first switch state different from that when the first switch means assumes the second switch state; and (e) a circuit which operates when it is detected by the detecting circuit that the second switch means has been changed over from the first to the second switch state in case the first switch means is in the second state.
Claim 7
Dependent Claim
47 words
A photographing apparatus according to claim 4, wherein the control circuit controls the delivery of the electrical signal per unit time when the first switch means is in the second switch state to be larger than that when the first means is in the first switch state.
Claim 8
Dependent Claim
52 words
A photographing apparatus according to claim 4 or 5, wherein the electrical signal is delivered in pulse, while the control circuit controls the pulse cycle when the first switch means is in the second switch state to be shorter than that when the first switch means is in the first switch state.
Claim 9
Dependent Claim
81 words
A photographing apparatus according to claim 4 or 5, where in the first switch means assumes the second switch state when the use of the photographing apparatus is selected, being operatively engaged with a selection operation member which selects use or non-use of the photographing apparatus, while the second switch means is operatively engaged with a release operation member or an information or photographingmode setting operation member so as to assume the second switch state with the operation of the member.
Claim 10
Dependent Claim
86 words
A photographing apparatus having a detecting circuit for detecting a state of a switch means, comprising: (a) a control circuit for making the number of detection operations per unit time of the detecting circuit to detect the state of a switching means different when the apparatus is in a first state from when the apparatus is in a second state; and (b) an operation control circuit for controlling the operation of the apparatus according to the state of the switch means detected by the detecting circuit.
Claim 11
Dependent Claim
86 words
A photographing apparatus having a detecting circuit for detecting a state of a switch means, comprising: (a) a control circuit for making the number of detection operations per unit time of the detecting circuit to detect the state of a switching means different when the apparatus is in a first state from when the apparatus is in a second state; and (b) an operation control circuit for controlling the operation of the apparatus according to the state of the switch means detected by the detecting circuit.
Claim 12
Dependent Claim
100 words
A photographing apparatus having at least first and second switch means, whereby the operation is determined according to the state of the second switch means when the first switch means is in the first state, comprising: (a) a detecting circuit for detecting the state of the second switch means by delivering an electrical signal for detecting the state of the second switch means; and (b) a control circuit which makes the delivery state of the electrical signal when the first switch means is in the first state different from that when the first switch means is in the second state.
Claim 13
Dependent Claim
100 words
A photographing apparatus having at least first and second switch means, whereby the operation is determined according to the state of the second switch means when the first switch means is in the first state, comprising: (a) a detecting circuit for detecting the state of the second switch means by delivering an electrical signal for detecting the state of the second switch means; and (b) a control circuit which makes the delivery state of the electrical signal when the first switch means is in the first state different from that when the first switch means is in the second state.
Claim 14
Dependent Claim
91 words
A photographing apparatus which detects the state of switch means so as to control the operation, comprising: (a) a detecting circuit for applying an electrical signal to the switch means so as to detect the switch state of the switch means; (b) selecting means for selecting use or non-use of the photographing apparatus, and (c) a control circuit for controlling the application per unit time of the electrical signal to the switch means when the use is selected by the operation means is larger than that when the non-use is selected.
Claim 15
Dependent Claim
91 words
A photographing apparatus which detects the state of switch means so as to control the operation, comprising: (a) a detecting circuit for applying an electrical signal to the switch means so as to detect the switch state of the switch means; (b) selecting means for selecting use or non-use of the photographing apparatus, and (c) a control circuit for controlling the application per unit time of the electrical signal to the switch means when the use is selected by the operation means is larger than that when the non-use is selected.
Claim 16
Dependent Claim
69 words
A photographing apparatus which detects a state of a switch means so as to control the operation, comprising: (a) a detecting circuit which applies an electrical signal to the switch means so as to detect the switch state of the switch means; and (b) a control circuit for making different the timing of adding an electrical signal to the switching means in accordance with a state of the apparatus.
Claim 17
Dependent Claim
69 words
A photographing apparatus which detects a state of a switch means so as to control the operation, comprising: (a) a detecting circuit which applies an electrical signal to the switch means so as to detect the switch state of the switch means; and (b) a control circuit for making different the timing of adding an electrical signal to the switching means in accordance with a state of the apparatus.
Claim 18
Dependent Claim
21 words
A photographing apparatus according to claim 11, wherein the control circuit changes the application per unit time of the electrical signal.
Claim 19
Dependent Claim
104 words
A photographing apparatus which includes a detecting circuit for detecting the state of switch means operatively associated with an operation member so as to set a photographing mode or control the operation by detecting the state of the switch means, comprising: (a) a detecting circuit which applies the electrical signal to the switch means so as to detect the switch state of the switch means; and (b) a control circuit which makes the application of the electrical signal to the switch means when the detection of the switch state is necessary different from that when the detection of the switch state is not necessary.
Claim 20
Dependent Claim
104 words
A photographing apparatus which includes a detecting circuit for detecting the state of switch means operatively associated with an operation member so as to set a photographing mode or control the operation by detecting the state of the switch means, comprising: (a) a detecting circuit which applies the electrical signal to the switch means so as to detect the switch state of the switch means; and (b) a control circuit which makes the application of the electrical signal to the switch means when the detection of the switch state is necessary different from that when the detection of the switch state is not necessary.
Claim 21
Dependent Claim
48 words
A photographing apparatus according to claim 13, wherein the control circuit carries out the control in such a manner that the application per unit time when the detection of the switch state is necessary is larger than that when the detection of the switch state is not necessary.
Claim 22
Dependent Claim
92 words
A photographing apparatus which includes a detecting circuit for detecting the state of switch means operatively associated with the operation member so as to set the photographing mode or control the operation by detecting the state of the switch means, comprising: (a) a control circuit which makes the number of the detecting operation per unit time of the switch means in the detecting circuit, when the detection of the state of the switch means is necessary different from that when the detection of the state of the switch means is not necessary.
Claim 23
Dependent Claim
92 words
A photographing apparatus which includes a detecting circuit for detecting the state of switch means operatively associated with the operation member so as to set the photographing mode or control the operation by detecting the state of the switch means, comprising: (a) a control circuit which makes the number of the detecting operation per unit time of the switch means in the detecting circuit, when the detection of the state of the switch means is necessary different from that when the detection of the state of the switch means is not necessary.
Claim 24
Dependent Claim
48 words
A photographing apparatus according to claim 15, wherein the control circuit which makes the number of the detecting operations per unit time, when the detection of the state of the switch is necessary, greater than that when the detection of the state of the switch is not necessary.
References Cited (Backward Citations)
US4492450A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-08-04 | 1990-02-03 | 1990-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-04 | 1994-02-03 | 1994-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-04 | 1998-02-03 | 1998-08-05 | $7700.00 | Window Closed / Lapsed |