Integral mechanically actuated electrical power source for a photographic camera or a flashgun accessory
阅读：267发布：2022-12-19
专利汇可以提供Integral mechanically actuated electrical power source for a photographic camera or a flashgun accessory专利检索，专利查询，专利分析的服务。并且The energy required to operate an electrical device, such as a photoflash lamp, associated with a camera is produced by a mechanically actuated electrical generator which constitutes an integral part of the camera and thus eliminates the need for batteries. The generator is spring-driven and comprises a stationary permanent magnet and a flat coil of insulated copper wire that is rapidly propelled a short distance along a path such that the coil cuts the magnetic lines of flux in the gap between the pole pieces of the magnet and produces a voltage pulse of sufficient magnitude to energize the photoflash lamp or other device. The generator is automatically primed for use when the shutter is cocked (or the film is advanced) and is then automatically actuated when the shutter-release mechanism is tripped. In the case of a photoflash lamp, the generated voltage pulse is so synchronized relative to the movement of the shutter that the fired lamp reaches peak light output while the shutter is in its aperture-open position. The wire coil is fastened to the camera shutter or a separate swingable member. Alternatively, the coil is wound in tubular form and is stationary and the magnet is moved relative to the coil. A flashgun having an integral manually operated electrical generator which charges a condenser that is discharged through a circuit controlled by the shutter-release mechanism and ignites a flashlamp in synchronism with the operation of the shutter is also disclosed.，下面是Integral mechanically actuated electrical power source for a photographic camera or a flashgun accessory专利的具体信息内容。
1. In combination with a photographic camera having a shutter that is controlled by a shutter-release mechanism, means for energizing and operating an electrical device associated with said camera comprising; a. an electrical generator comprising a permanent magnet having a pair of spaced pole pieces, electrical conductor means shaped and dimensioned to fit freely within and pass through the gap separating said pole pieces, and means holding said permanent magnet and electrical conductor means in spaced apart relationship and operable to permit relative movement therebetween a limited distance along a path that extends between and beyond said pole pieces and thus causes said electrical conductor means to traverse and cut magnetic lines of flux in said gap, without touching said pole pieces, b. means for controllably storing mechanical energy and, in response to the actuation of said shutter-release mechanism, for converting stored mechanical energy into kinetic energy which actuates the electrical generator and rapidly moves the permanent magnet and electrical conductor means relative to one another along said path and thereby produces a voltage pulse in said electrical conductor means, and c. circuit means connected to said electrical conductor means for delivering the generated voltage pulse to a device associated with the camera.
2. The combination of claim 1 wherein; said mechanical-energy storage means comprises a mechanically loadable resilient component that is retained in loaded position by a latch means, and said shutter-release mechanism is coupled to and actuates said latch means.
3. The combination of claim 1 wherein; said electrical conductor means comprises a coil of insulated wire, and said circuit means includes a capacitor that is connected in series with said wire coil and has a capacitive reactance which reduces the inductive reactance of the coil and thereby increases the magnitude of the voltage pulse produced by the electrical generator.
4. The combination of claim 1 wherein; said shutter when actuated opens and closes the camera aperture in a prescribed time-sequence, the device associated with the camera comprises a photoflash lamp, said camera includes socket means for releasably holding a photoflash lamp and connecting said lamp to said circuit means, and said mechanical-energy storage means actuates the electrical generator at a time that is so correlated with the movement of the released shutter that the resultant voltage pulse ignites a photoflash lamp in said socket means at a predetermined time relative to the opening of the aperture by the shutter.
5. The combination of claim 4 wherein; said mechanical-energy storage means comprises a spring, and said spring, electrical generator and circuit means comprise integral parts of the camera.
6. The combination of claim 5 wherein; said electrical conductor means comprises a tubular coil of insulated fine wire that is mounted in upstanding fixed position within the camera remote from the aperture and optical axis thereof, said permanent magnet is movably mounted within the camera and disposed so that said tubular coil passes freely through the gap between the pole pieces when the magnet is moved along said path, and said spring is attached to a stationary part of the camera and to a pivoted striker member that is seated against the magnet and is pulled toward the tubular winding by the spring, and said striker member and attached spring are retained in loaded condition by said latch means.
7. The combination of claim 6 wherein; said permanent magnet has three elongated pole pieces that are substantially parallel to one another and define a pair of laterally-spaced gaps that are aligned with diametrically disposed wall portions of the tubular coil, a second spring is attached to said permanent magnet and to a stationary part of the camera and coacts witH the other spring in a manner such that the permanent magnet is (a) normally spaced from said tubular coil, (b) propelled into said coil when the latch means is tripped by the shutter-release mechanism, and (c) returned to its original position when the striker member and attached spring are again placed in loaded condition.
8. The combination of claim 5 wherein; said permanent magnet is mounted in fixed position within the camera, said electrical conductor means comprises a substantially planar coil of insulated fine wire that is swingable about an axis that is so oriented relative to the magnet that the coil is propelled edgewise in the gap between the pole pieces along a path that is substantially normal to the magnetic lines of flux in said gap, and said circuit means includes flexible lead wires that are connected to said planar coil and are movable therewith.
9. The combination of claim 8 wherein; said fine-wire coil is secured to a planar support of non-magnetic material and together therewith constitutes a swingable blade-like armature, and said armature is coupled to a return spring which is so oriented and of such stiffness relative to the other spring that the armature is propelled out of and then back into the gap between the pole pieces in a rapid whip-like motion when the shutter-release mechanism is actuated.
10. The combination of claim 8 wherein; said fine-wire coil is secured to a planar support member of non-magnetic material and together therewith constitutes a swingable blade-like armature, and said armature is coupled to a return spring which is so oriented and of such stiffness relative to the other spring that the armature is propelled into and then out of the gap between the pole pieces in a rapid whip-like motion when the shutter-release mechanism is actuated.
11. The combination of claim 10 wherein; the shutter also comprises a blade-like member, said armature and shutter are fastened to a common shaft and are positioned in longitudinally spaced and angularly offset relationship with respect to one another, and said shaft is rotated through a prescribed angle by said springs and the shutter and armature are thus simultaneously triggered as a unit by the shutter-release mechanism.
12. The combination of claim 10 wherein; said armature comprises the camera shutter, said pole pieces are located adjacent the aperture, and the shutter-armature is retained in aperture-closing position by the return spring.
13. The combination of claim 12 wherein; the spacing between the camera aperture and pole pieces, the relative stiffness of said springs, and the velocity of the released shutter-armature are such that the generated voltage pulse is applied to a connected photoflash lamp at a time such that the ignited lamp reaches peak light output while the shutter-armature is in aperture-open position.
14. In a flashgun adapted for use with a photographic camera having a shutter-release mechanism, means for releasably coupling the flashgun to the camera, and terminal means for electrically connecting the flashgun to a switch within the camera that is controlled by the shutter-release mechanism, the combination comprising; a housing, an electrical generator within said housing comprising a permanent magnet having a pair of spaced pole pieces, electrical conductor means shaped and dimensioned to fit freely within and pass through the gap separating said pole pieces, and means holding said permanent magnet and electrical conductor means in spaced apart relationship and operable to permit relative movement therebetween a limited distance along a path such that said electrical conductor means cuts the magnetic lines of flux in said gap without touching said pole pieces, means secured to said housing for actuating said electrical generator and thereby producing a voltage pulse in said electrical conductor means, a capacitor within said housing and connected to sAid electrical conductor means for storing the electrical energy produced by the electrical generator, a reflector fastened to said housing, socket means mounted on the reflector for releasably holding a photoflash lamp, a pair of contactors in said socket means for engaging the contacts of a photoflash lamp placed in said socket means, and circuit means within said housing connecting one side of said capacitor to one of the socket contactors and the other side of said capacitor to exterior connector means adapted to engage the terminal means on the camera and connect said other side of the capacitor to the other of said socket contactors through the switch in the camera when the flashgun is coupled to the camera and the shutter-release mechanism is actuated.
15. The combination of claim 14 wherein; said permanent magnet is mounted in fixed position within said housing and has three elongated pole pieces that are disposed in parallel-spaced relationship and define a pair of laterally spaced gaps, said electrical conductor means comprises a tubular coil of insulated fine wire dimensioned to pass freely over the central pole piece of the magnet through said gaps, said tubular coil is coupled to an actuating lever that is pivotally fastened to said housing and extends therebeyond through an opening in the housing, and said actuating lever is coupled to a return spring that is anchored to the housing and has a spring factor such that it maintains the tubular coil in withdrawn position relative to the pole pieces and, after the actuating lever is operated, returns the tubular coil to such withdrawn position at a speed which does not materially decrease the stored electrical energy in said capacitor.
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