摘要:
A film cassette comprises a spool core supported for rotation in an unwinding direction about an axis, a filmstrip coiled about the spool core to form a film roll, and annular constraining means supported for rotation about the axis of the spool core but inclined with respect to the axis to position the constraining means partially encircling an outermost convolution of the film roll to confine the outermost convolution and partially not encircling the outermost convolution to allow a leading end of the film roll to escape confinement of the outermost convolution when the spool core is rotated in the unwinding direction. The spool core and the annular constraining means include respective engagement means for engaging when the spool core is rotated in the unwinding direction, to make the constraining means rotate with the spool core in the same direction. An inner face of the annular constraining means and a longitudinal edge of the outermost convolution of the film roll include respective connection means for interlocking only along where the constraining means is encircling the outermost convolution, to cause the constraining means to drive the outermost convolution without any slippage when the constraining means is made to rotate with the spool core in the unwinding direction.
摘要:
A vehicle windshield wiper control system has an electrically driven wiper motor, a wiper control switch coupled to the motor and having a delay position wherein the motor operates intermittently, a vehicle speed sensor, and a control unit coupled to the control switch, the motor, and to the speed sensor. The control operation of the motor, the control unit periodically executes a method or algorithm which causes the system to vary the dwell time between motor operations as a function of sensed vehicle speed, and optionally as a function of an operator adjustable dwell time control.
摘要:
In a photographic camera, a cassette carrier having a chamber for receiving a film cassette is movable outwardly from the camera body to permit one to insert and remove the film cassette. A drive spindle for the film cassette and a coaxial gear are rotatably mounted on a spring-urged slider supported on the carrier. Datum projections extend from the camera body to enter the chamber when the carrier is moved to return the chamber to inside the camera body, to shift the cassette from a centered position in engagement with the drive spindle to a datum position in the chamber. Simultaneously, a datum stop located in the camera body abuts the slider to shift the slider with the cassette and to limit the extent to which the coaxial gear will mesh with a driving gear rotatably supported in the camera body.
摘要:
A film metering mechanism has parallel pawl and blade elements with apertures that align in the beam of an infrared detector to slow down a camera drive motor when a pawl tooth senses a perforation during film advance, prior to reaching a drive motor stopping point. The pawl has a cutout with upper longitudinal and ramp surfaces that engage a fixed pin. The blade has a stepped surface that shifts contact between two pawl pins in correspondence with the relative location of the cutout surfaces and the fixed pin.
摘要:
In a film cassette, a film spool is rotatable inside a cassette shell in an unwinding direction to thrust a leader section of a filmstrip coiled about the spool from within a light-tight film passageway to the exterior of the shell and in a winding direction to return the leader to the interior of the shell. A unidirectional arresting device is movable into engagement with the spool to prevent rotation of the spool in only the winding direction. The filmstrip includes an inclined edge for moving the arresting device out of engagement with the spool responsive to thrusting the leader substantially to the exterior of the shell, to allow the spool to be rotated in the winding direction in order to return the leader to the interior of the shell, and for permitting the arresting device to move into engagement with the spool responsive to return of the leader to within the passageway, to prevent the spool from being rotated further in the winding direction to thereby retain the leader in the passageway.
摘要:
A photographic camera is intended for use with a film cassette having a film-exposure status indicator movable from an unexposed position for providing a visible indication that a filmstrip within the cassette is generally unexposed, to a partly exposed position for providing a visible indication that the filmstrip is only partly exposed, and to an exposed position for providing a visible indication that exposure of the filmstrip is complete. The camera is capable of returning the filmstrip to the cassette prematurely when the filmstrip is only partly exposed and of advancing the filmstrip from the cassette subsequently to complete its exposure, and includes control means that operates drive means to move the status indicator from its unexposed position to its partly exposed position in the event the filmstrip returned to the cassette is partly exposed and to move the status indicator from either its unexposed or partly exposed position to its exposed position in the event the filmstrip returned to the cassette is substantially exposed.
摘要:
A simple inexpensive camera to be used with a film cassette having a film-exposure status indicator movable from an unexposed position for providing a visible indication that a filmstrip within the cassette is generally unexposed, to a partly exposed position for providing a visible indication that the filmstrip is only partly exposed, and to an exposed position for providing a visible indication that exposure of the filmstrip is completed, is adapted to move the status indicator from its unexposed position to its exposed position, without stopping at its partly exposed position, substantially when film drive means of the camera changes the state of the filmstrip relative to the cassette. The change of state of the filmstrip relative to the cassette may be accomplished in the camera either by advancing the filmstrip from the cassette to expose the filmstrip or by returning the filmstrip to the cassette to safeguard the filmstrip.
摘要:
An open frame sight viewfinder for a photographic camera is disclosed wherein an aiming or target ring of aiming the camera at a subject to be photographed is positioned forward of a correspondingly shaped viewing aperture to view the subject simultaneously through the ring and the aperture. The aiming ring is dimensioned to approximately encircle the extreme rays of ambient light permitted to pass through the viewing aperture. As as a result, when the camera is correctly aimed at the subject, the aiming ring substantially cannot be seen in the viewing aperture. However, when the camera is incorrectly tilted relative to the subject, the aiming ring partially occludes the viewing aperture.
摘要:
An improved shutter mechanism is disclosed which is generally of the type wherein a shutter blade is mounted for pivotal opening movement and pivotal closing movement in opposite directions about a fixed pivot to uncover and recover a lens opening, wherein a return spring biases the shutter blade in the direction of closing movement, and wherein a fixed stop is positioned to end closing movement of the blade. According to the invention, there is provided bounce control means for enabling the shutter blade to swing about the fixed stop rather than about the fixed pivot in response to a mechanical shock to the blade caused by the blade abruptly hitting the stop. This will change the direction of movement of the blade from the direction of opening movement and thereby prevent the mechanical shock from inducing the blade to bounce off the stop and uncover the lens opening. Thus, the possibility of an undesired second exposure as in prior art mechanisms is prevented.
摘要:
A system for providing secured access to and/or control of a vehicle is provided. The system includes a vehicle network such as a CAN. A remote communications device is used for sending a signal for controlling functions associated with the vehicle. There is a receiver operatively connected to the vehicle network and adapted to receive the signal from the remote communications device. At least one access module is adapted to provide control of functions of the vehicle by a user from outside of the vehicle, the access module is electrically connected to the vehicle network. There is at least one user input device associated with the access module and there are a plurality of outputs associated with the access module wherein the access module is adapted to directly control access to the vehicle through control of the plurality of outputs.