Patent US3602584A successfully refreshed from Google Patents.
US3602584A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic release arrangement for motion picture cameras
Assignee: NIEZOLDI AND KRAMER GmbH
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Filing: 1969-07-14
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Granted: 1971-08-31
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Expires: 1989-07-14
Abstract
Abstract A release arrangement for a motion picture camera in which a release member blocks the operation of the camera and disconnects the motor circuit through an electromagnet when the camera is in the inoperative state. By depressing the release button of the camera, the electromagnet becomes energized and the release member permits the camera to operate freely. A timing network is connected to the electromagnet for controlling the current flow through the motor from the instant that the new release button is depressed through the duration of operation of the camera.
Inventors
- 👤 Peter Anderl
- 👤 Rainer Giesler
- 👤 Theodor Steibl
- 👤 Johann Roth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:13
CPC Classifications
G; G03; G03B; G03B19/00; G03B19/18
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
130 words
A release arrangement for a motion picture camera comprising, in combination, a motor for operating said camera; a release member blocking the operation of said camera when said release member is in the inoperative position, the circuit of said motor being open when said release member is in said inoperative position; an electromagnet for actuating said release member; actuating means connected to said electromagnet for actuating said release member and closing said circuit of said motor when said actuating means is actuated, said release member being transferred to the operative position when actuated by said electromagnet, the operation of said camera being free form being blocked by said release member when in said operative position; and timing means connected to said electromagnet for controlling the current flow through said motor.
Claim 2
Dependent Claim
130 words
A release arrangement for a motion picture camera comprising, in combination, a motor for operating said camera; a release member blocking the operation of said camera when said release member is in the inoperative position, the circuit of said motor being open when said release member is in said inoperative position; an electromagnet for actuating said release member; actuating means connected to said electromagnet for actuating said release member and closing said circuit of said motor when said actuating means is actuated, said release member being transferred to the operative position when actuated by said electromagnet, the operation of said camera being free form being blocked by said release member when in said operative position; and timing means connected to said electromagnet for controlling the current flow through said motor.
Claim 3
Dependent Claim
33 words
The release arrangement for a motion picture camera as defined in claim 1 wherein said electromagnet is connected in series with said motor, said timing means being connected in shunt with said motor.
Claim 4
Dependent Claim
48 words
The release arrangement for a motion picture camera as defined in claim 1 wherein said timing means comprises transistorized electronic means having a transistor stage connected to said electromagnet so that the current through said electromagnet is diminished through shifting of the operating point of said transistor stage.
Claim 5
Dependent Claim
27 words
The release arrangement for a motion picture camera as defined in claim 3 wherein said transistorized electronic means is connected between said actuating means and said electromagnet.
Claim 6
Dependent Claim
31 words
The release arrangement for a motion picture camera as defined in claim 1 wherein said timing means includes a resistor-capacitor network wherein a resistor is connected in parallel with a capacitor.
Claim 7
Dependent Claim
50 words
The release arrangement for a motion picture camera as defined in claim 1 wherein said timing means includes a resistor-capacitor network comprising a resistor; a capacitor connected in series with said resistor to form a series resistor-capacitor circuit; and adjustable resistor means connected in parallel with said series resistance-capacitance circuit.
Claim 8
Dependent Claim
40 words
The release arrangement for a motion picture camera as defined in claim 1 including switching contact means operated by said electromagnet for opening and closing the circuit of said motor as a function of the operating state of said electromagnet.
Claim 9
Dependent Claim
44 words
The release arrangement for a motion picture camera as defined in claim 1 wherein said release member comprises a two armed lever rotatable about an axis between the two arms of said lever, one arm of said lever being magnetically actuatable by said electromagnet.
Claim 10
Dependent Claim
84 words
The release arrangement for a motion picture camera as defined in claim 8 including an operating shaft member driven by said motor for operating said camera; and an abutting member secured to said operating shaft member and rotatable therewith, said abutting member being engaged by said lever for inhibiting rotation of said shaft and thereby blocking the operation of said camera; and spring means connected to said lever for acting upon said lever in opposition to the actuation of said lever by said electromagnet.
Claim 11
Dependent Claim
40 words
The release arrangement for a motion picture camera as defined in claim 9 wherein said abutting member has a cutout entered by said lever for inhibiting rotation of said shaft, said lever having a nose-shaped portion for entering said cutout.
Claim 12
Dependent Claim
43 words
The release arrangement for a motion picture camera as defined in claim 9 including gear means for mechanically connecting said motor to said shaft for operating said camera when said shaft is freely rotatable and free from being blocked by said release member.
Claim 13
Dependent Claim
26 words
The release arrangement for a motion picture camera as defined in claim 1 wherein said electromagnet is a solenoid with electromagnetic coil and electromagnetically actuated armature.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |