Abstract: A coupling device for controlling the shutter blades of a leaf type shutter. The coupling device includes two or more hubs that are each coupled to a shutter blade and a portion of a base and a continuous belt that is in contact with the hubs so that when the hubs rotate in a first direction the shutter blades will open and when the hubs rotate in a second direction the shutter blades will close.

Abstract: A system is provided that causes the CRT of a CRT printer to produce images on the screen of the CRT that have the same illumination for the same CRT input signal, irregardless of the temperature variation, drift and aging of the components of the CRT video amplifier and drive circuit. The system also provides enhanced means of horizontal and vertical blanking combined with shutter control of the CRT.

Abstract: A method and apparatus that uses heat to bond a polyethylene sleeve (having pockets that contain negative strips) to the back non-light sensitive surface of a photographic paper coated with polyethylene. A positive image or index print of the information stored on the negative appears on the front light sensitive, image bearing surface of the photographic paper.

Abstract: A device and method for electromagnetically activating the shutter of a camera to provide different aperture openings comprises:an armature having a core and a coil, the core is capable of receiving current, and the armature will produce a first magnetic field;a movable magnet member that produces a second magnetic field at one of its two ends, the second magnetic field is coupled to the first magnetic field and the other end of the member is coupled to one or more shutters; anda circuit capable of receiving current coupled to a coil for setting the direction of current flow in the coil to a first direction or a second direction or for denying the presence of current flow in the coil so that when the coil receives no current a first magnetic field will not be present and the member will be at a first location and move one or more shutter elements to block the aperture and allow no light to enter the camera, and when current flows through the coil in a first direction the member will be attracted by the first

Abstract: A system for electromagnetically activating the shutter of a camera to provide different aperture openings by providing: an armature comprising a core and a coil, the core is capable of receiving current and the armature will produce a first magnetic field; a movable magnet that produces a second magnetic field, the magnet is positioned within the core in a manner that a first gap, a second gap, a third gap, a fourth gap, a fifth gap, a sixth gap, a seventh gap and a eighth gap will contiguously surround the magnet and be present between the core and the magnet so that the second magnetic field is coupled to the first magnetic field and the magnet is coupled to the shutter; and means coupled to the current means and the coil for setting the direction of current flow in the coil to a first direction or a second direction or for denying the presence of current flow in the coil so that when the coil receives no current a first magnetic field will not be present and the magnet will be at a first location and move

Abstract: A single electromagnet and a single permanent magnet to actuate a shutter blade and a plurality of aperture blades, that form a plurality of aperture openings. A magnet is coupled to an electormagnet and an aperture adjustment mechanism. The magnet rotates in one direction to set the aperture opening and then rotates in the opposite direction to actuate a shutter blade.