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| Number | Title | Issue Date |
| 7276805 | Manual-powered generator and assemblies therewith The invention provides a manually-powered electrical assembly. In one aspect, the manually-powered electrical assembly can be a light assembly that comprises a light source, an electrical generator, and a manual actuator assembly. The electrical generator is electri... | 10/02/2007 |
| 7239901 | Tissue spectrometer with improved optical shutter An improved system and method for calibrating spectrophotometric instruments for the effects of light source drift. An instrument includes both received light and reference light paths to a light sensor where light signals are converted to electrical signals to be u... | 07/03/2007 |
| 7106962 | Synchronizing shutter and flash in camera with switch closing member capable of elastic deformation A camera with a built-in electronic flash has a spring-driven high energy lever that is pivoted for initiating shutter opening and for translating a switch closing member to close a normally open shutter-flash synchronization switch. When the switch reopens, it tran... | 09/12/2006 |
| 4565431 | Photographic camera and flash assembly In a multilamp flash assembly adapted for attachment to a camera having a flashlamp firing circuit, the respective flashlamps are advanced sequentially to a firing position. A lamp advancing member in the flash assembly is made of an electrically conducti... | 01/21/1986 |
| 4497553 | Shutter mechanism Opening and closing blades of a shutter are actuated substantially simultaneously with flash firing means igniting a chemical flash lamp. However, initial opening of the shutter is delayed after flash ignition to synchronize full opening of the shutter wi... | 02/05/1985 |
| 4407576 | Synchronizing mechanism for flash firing and shutter operation In a camera, a piezoelectric generator is struck by a hammer to produce an electrical pulse for flash firing. A firing spring carrying the hammer engages a shutter blade to drive the blade as the spring is moved to impact the hammer against the crystal. W... | 10/04/1983 |
| 4204757 | Flash lamp operating mechanism A camera construction including a flash mechanism utilizing a generator which is responsive to impact forces. The generator is connected to the flash mechanism, and the generator is provided with an anvil for application of the impact with current being t... | 05/27/1980 |
| 4183648 | Synchronizing mechanism for flash firing and shutter actuation In a camera, a piezoelectric generator is struck by a hammer to produce an electrical pulse for flash firing. The resulting mechanical shock to the piezoelectric generator is transmitted through the generator to a shutter blade, which is actuated by the s... | 01/15/1980 |
| 4107710 | Photographic apparatus for use with self-processing film units An improved photographic apparatus particularly suitable for the exposure and initiation of processing of a self-processing film unit includes a pivotable and translatable shuttle that includes a picker finger for engaging a trailing edge of a film unit a... | 08/15/1978 |
| 4101792 | Mechanically-powered electric generator for instant-photographic camera and other apparatus A compact electric generator that is powered by a tensioned spring and adapted to serve as an integral and permanent source of electric energy for a photographic camera or other apparatus. The generator includes a permanent magnet, a pole piece and a reci... | 07/18/1978 |
| 4082985 | Gas discharge flash lamp with piezoelectric trigger generator An electronic flash unit for igniting a gas discharge flash lamp by means of a piezoelectric element. The unit input terminals are interconnected by a series circuit comprising a rectifier and an undercritically damped parallel LC circuit. The lamp starti... | 04/04/1978 |
| 4070685 | Firing spring cocking mechanism A mechanism for cocking the firing spring of a piezoelectric generator in a photographic camera includes a ramp surface on a body release member that is movable into engagement with the firing spring during return movement of the body release member, to m... | 01/24/1978 |
| 4054815 | Circuit arrangement for igniting a gas discharge flash tube A circuit arrangement for igniting a gas discharge flush tube in which the flash tube is arranged in the circuit of a voltage source in parallel to a flash capacitor and the flash tube is connected to an ignition voltage generator which emits high voltage... | 10/18/1977 |
| 4052730 | Double exposure prevention device A camera having a self cocking shutter with a shutter actuating member for initiating exposures and a piezo-electric flash device with a flash firing spring that is cocked in concert with film advance, includes a double exposure prevention latch that disa... | 10/04/1977 |
| 4025817 | Trigger device for an electronic flash unit An electronic flash unit for use with a flash-trigger mechanism having a piezoelectric generator. An RF coil or inductor interconnects the piezo crystal and flash-trigger electrode and operates to modify the energy distribution of the piezo output pulse s... | 05/24/1977 |
| 3968507 | Film advance-flash interlock mechanism A mechanism in which a latch is movable between a latching and an unlatching position. The latch includes a first arm engageable by a shutter actuator to move the latch to its unlatching position, a second arm for retaining a piezoelectric firing spring i... | 07/06/1976 |
| 3958259 | Firing spring cocking mechanism A firing spring cocking mechanism including a surface on a film advance slide, movable into engagement with a piezoelectric crystal firing spring during movement of the film advance slide, to move the firing spring to a latched position. A latch is provid... | 05/18/1976 |
| 3958258 | Flash shorting mechanism A mechanism for minimizing electrostatic flashing of a lamp in a flash array by providing a short circuit across the camera socket terminals until flash firing is desired. The mechanism includes an electrically conductive piezoelectric firing spring conne... | 05/18/1976 |
| 3955205 | Film advance-flash interlock mechanism A mechanism for energizing a piezoelectric firing spring, cocking a camera shutter drive mechanism and advancing film within the camera is adapted to prevent short-stroke operation of the camera during movement of the piezoelectric firing spring to its fu... | 05/04/1976 |
