US3596580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Camera shutter timing cutoff switch
Assignee: Hittech Prontor GmbH
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Filing: 1969-07-15
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Granted: 1971-08-03
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Expires: 1989-07-15
Abstract
Abstract A photographic camera that has an electronic timing device controlled in dependence upon light conditions by a photosensitive resistor in the circuit of the timing device. A lamp is disposed in the circuit to indicate the open state of the camera shutter and a manually operated switch is placed in the circuit and is operable to cause the camera shutter to close independently of the action of the timing device. A switch button formed as a translucent body is connected to the switch and is disposed to be illuminated by the lamp to indicate the open state of the camera.
Inventors
- 👤 Waldemar T Rentschler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:29
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/08; G03B7/081; G03B7/083; G03B9/00; G03B9/58
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
41 words
The photographic camera of claim 1 wherein said switch button is formed as a hollow body and said lamp extends into the interior of said hollow body, and wherein said switch button is directly engaged with said switch for actuation thereof.
Claim 2
Dependent Claim
20 words
The photographic camera of claim 1 wherein a light reflector is located between said switch button and said indicating lamp.
Claim 3
Dependent Claim
23 words
The photographic camera of claim 1 wherein said indicating lamp is cylindrical and functions as a pushbutton by acting directly on said switch.
Claim 4
Dependent Claim
126 words
A photographic camera including electronic timing means controlled in dependence upon light conditions by a photosensitive resistor, circuit means including said photosensitive resistor, said circuit means being operatively connected to said electronic timing means, a lamp in said circuit means indicating the open state of the camera shutter, a manually actuatable switch in said circuit means, said switch being operable to close said camera shutter independently of the action of said timing means, and a switch button moveably mounted on the housing of said camera and engageable with said switch, said switch button being a hollow translucent body with said lamp extending into the interior of said hollow body, said button being lit up by said lamp to indicate the open state of the camera shutter.
Claim 5
Dependent Claim
118 words
A photographic camera including electronic timing means controlled in dependence upon light conditions by a photosensitive resistor, circuit means including said photosensitive resistor, said circuit means being operatively connected to said electronic timing means, a lamp in said circuit means indicating the open state of the camera shutter, a manually actuatable switch in said circuit means, said switch being operable to close said camera shutter independently of the action of said timing means, and a translucent switch button moveably mounted on the housing of said camera and engageable with said switch, and a light reflector disposed between said switch button and said lamp to light up said switch button to indicate the open state of the camera shutter.
References Cited (Backward Citations)
US3429244A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |