Abstract: A camera comprising a main body part having a chamber for holding an exposed filmstrip wound into a exposed film roll, and a film winding thumbwheel for winding the exposed filmstrip into the exposed film roll, is characterized in that the main body part has a film egress opening at one end of the chamber which is dimensioned to allow the exposed film roll to be unloaded from the chamber through the film egress opening, and the film winding thumbwheel light-tightly seals the chamber at the film egress opening and is removable to permit the exposed film roll to be unloaded from the chamber.

Abstract: A camera comprising a main body part having a backframe opening for exposing successive sections of a filmstrip, a metering sprocket rotatably supported on the main body part proximate the backframe opening and having respective teeth that can project through individual perforations in the filmstrip to engage successive sections of the filmstrip at the backframe opening, and a rear cover part having a plurality of parallel film guide ribs longitudinally extending to guide successive sections of the filmstrip over the backframe opening, is characterized in that one of the film guide ribs includes an integral portion configured to at least partially surround the teeth of the metering sprocket one at a time, in a predetermined location at which each tooth projects from one of the perforations in the filmstrip, to retain a film section at the backframe opening in engagement with the tooth.

Abstract: A camera for use with a film cartridge having a spool rotatable in a film winding direction to wind an exposed filmstrip into the cartridge and a light lock movable to be closed after the exposed filmstrip has been wound into the cartridge, comprising a film winder rotatable in engagement with the spool in the film winding direction to rotate the spool in the same direction, and a closing actuator rotatable in engagement with the light lock to close the light lock and including a film sensor for sensing the presence and absence of the exposed filmstrip to determine whether the exposed filmstrip has been wound into the cartridge, is characterized in that the film winder and the closing actuator are mutually coupled when the film sensor senses the presence of the exposed filmstrip, to prevent the film sensor substantially from applying any pressure against the exposed filmstrip, and when the film sensor senses the absence of the exposed filmstrip, to rotate the closing actuator to close the light lock when the

Abstract: A one-time-use camera provided with an opaque cover part comprising a door portion and a remaining portion, a line of weakness between the door portion and the remaining portion that allows the door portion to be pivoted along the line of weakness to open the door portion, and a pair of lead-in slots between the door portion and the remaining portion each having an open lead-in end and an opposite end that is closed at the line of weakness to facilitate pivoting the door portion to be opened, is characterized in that the slots are partially filled between their open and closed ends with opaque tear substances that are thin enough to be readily ripped, from the open ends of the slots to the closed ends of the slots, when the door portion is pivoted along the line of weakness to be opened.

Abstract: A camera mechanism comprising a manually depressible shutter release button, a resilient cantilevered support for the shutter release button which is moved when the shutter release button is manually depressed, and a rotatable sprocket for engaging a filmstrip, is characterized in that the sprocket has a spindle that rotates with the sprocket, and the cantilevered support has a bearing hole in which spindle is rotated, to allow the cantilevered support to be moved firmly against the spindle to brake the film sprocket when the shutter release button is manually depressed.

Abstract: A photographic camera, including a moveable exposure initiation member, is provided with a film brake that is applied by movement of the member to initiate an exposure. The brake engages an element of the film advancing mechanism and thereby arrests film movement during the exposure. The brake is released after the exposure when the member returns to its original position.A method of assembling a camera also is provided using certain parts reassembled and reused from a single-use camera with a film brake as noted above.

Abstract: To prevent photographs from being blurred by film creep, a camera having a spring-loaded shutter driver member that is movable from a cocked position to an uncooked position to operate the camera shutter and then to deactivate a film metering mechanism, is provided with a blocking member that is movable temporarily into the path of the shutter driver to stop the driver at an intermediate position after it has operated the shutter but before it deactivates the metering mechanism.

Abstract: A system for monitoring, processing and storing operating parameters of a boiler room. A sonar gauge for measuring the level of liquid fuel in a storage tank, thermocouples to measure temperatures at varous points in the boiler room, and means to monitor the operating status of boiler room equipment are provided. Means to convert to digital data, store and analyze the digital data, and transmit the digital data to a remote location are provided.