摘要:
An apparatus and process for detecting rotor position for improved motor start-up. The apparatus detects a target equilibrium position of the rotor using a fixed gain amplifier, window comparator and slope detector circuitry. The window comparator circuitry qualifies the peaks of the back EMF signal. Slope detector circuitry pinpoints the peak of the back EMF signal qualified by the window comparator. The technique utilizes the steps of energizing the phase windings of said motor, detecting the target equilibrium position, and then accelerating the motor through a commutation process.
摘要:
A digital image processor that establishes a boundary level of acceptable hardcopy print quality level based on selected image print size and printing magnification and provides a warning to the user prior to generation of the hardcopy print that alerts the user when the determined print image quality will be unsatisfactory.
摘要:
A method of operating a photographic camera to record data in correspondence with a picture frame includes activating a flash to provide illumination for exposing the picture frame onto a photographic film. Sensing is performed to determine if light generated by the flash is reflected from a subject in the picture frame. Data is recorded in association with the picture frame indicating if reflected light is sensed. In accordance with a method of operating a photographic printer to print a negative frame, the reflected flash illumination data associated with the negative frame is read. An appropriate exposure for the negative frame is selected based at least in part on the presence or absence of the sensed reflected flash illumination.
摘要:
When a rotary-actuator voice coil type disk drive is powered down the actuator arm is moved to a parking position against an I.D. stop by a disk spindle motor back EMF, resulting from the spinning down of the spindle motor. Current is applied by the back EMF through a delay circuit to a latch arm voice coil on one end of a latch arm and forming part of a magnetic circuit including a drive permanent magnet on a ferrous base plate and a ferrous upper plate. Resultant movement of the latch arm overcomes a spring bias of a torsion spring extending between the base plate and pivoted latch arm normally keeping the latch arm in an unlatched position. A latch permanent magnet extends from the other end of the latch arm and is brought into spaced proximity, but not contact, with a ferrous member extending from the actuator arm so that the magnetic force therebetween holds the actuator arm against the I.D. stop in latched position to withstand high shock loadings. Powering the rotary actuator voice coil motor up overcomes the magnetic force and allows the biased torsion spring to move the latch arm to the unlatched position without resultant loss of data storage area.
摘要:
The camera of the invention includes a magnetic recording head adjacent the film and a processor which senses the lens focal length, the aperture size, the shutter speed and the film ISO number or film speed, and makes the following determinations: First, it determines from the scene brightness and film speed whether the ideal combination of shutter speed and aperture size, in terms of a required exposure value, falls within the range of maximum and minimum shutter exposure times and aperture sizes of which the camera is capable of providing, expressed in terms of a minimum camera exposure value and a maximum camera exposure value. If the ideal exposure value for that scene falls outside the range of camera exposure values, then the processor causes a magnetic recording head to magnetically record in or adjacent the current film frame a coded indication symbolic of the fact that the required exposure value was beyond the camera exposure value range.
摘要:
An automated storage and retrieval system stores containers, typically containing biological or chemical samples, at ultra-low temperatures, i.e., from about −50° C. to about −90° C., preferably about −80° C. under normal operating conditions. Dry gas air flows are used to reduce moisture and the consequential frost within the freezer compartment. A custom insulated door is provided with an access module and a tube picking compartment as well as servo motors for controlling a robot within the ultra-low temperature freezer compartment. The robot automatically places sample storage containers in stationary storage racks within the freezer compartment. Magnetic couplings are used to transmit mechanical power from outside of the freezer compartment to the robot inside of the freezer compartment. The robot has a simplified mechanical configuration. The custom door can be readily attached to standard freezer bodies.
摘要:
A method of supplying photofinishing services includes the steps of supplying a memory device for a digital camera to a photographer; the photographer taking and storing a plurality of digital images on the memory device; the photographer delivering the memory device containing the digital images to a photofinisher; the photofinisher producing prints of the digital images and returning the prints to the photographer; and the photofinisher erasing the digital images from the memory device and supplying the memory device to another photographer to repeat the steps of taking images and delivering the memory device to the photofinisher.
摘要:
A film leader comprising a main leader portion having a pair of parallel straight edges between which the main leader portion has a constant width, an extreme end portion extending from the main leader portion and having a pair of longitudinal edges between which the extreme end portion only has a width that is smaller than the width of the main leader portion; and a weakened fold-line, is characterized in that the weakened fold-line completely divides the main leader portion and the extreme end portion and is uniformly inclined from one of the parallel straight edges of the main leader portion to the other parallel straight edge of the main leader portion to thus form a forward-most inclined straight edge of the main leader portion when the extreme end portion is folded totally onto the main leader portion along the fold-line.
摘要:
A photographic camera to be used with a film cassette having a locking member movable between respective locking and non-locking positions for arresting and releasing a film exposure status indicator in any one of several exposure status positions, is characterized in that a loading chamber is configured to receive the film cassette with the indicator in at least one of its exposure status positions and actuation means is located in the loading chamber for moving the locking member from its locking position to its non-locking position responsive to insertion of the cassette into the loading chamber and for moving the locking member from the non-locking position to the locking position responsive to removal of the cassette from the loading chamber.
摘要:
Magnetic recording apparatus for a photographic still camera comprises a fixed magnetic head mounted on a film platen. The head is adapted to contact a magnetic coating on the film adjacent the image area of the film. A pressure pad is mounted in the camera on the opposite side of the film and positioned in close proximity to the film. The pressure pad is biased by a spring to apply pressure on the head through pressure on the film to assure that the film is in intimate contact with the head when the film is advancing. During film exposure when the film is stationary, the pressure pad is retracted to avoid distortion of the image plane.