Abstract: A method and apparatus is disclosed for flattening perforated web fed materials so that when cut into sheets they stack easily without a tendency to fall to one side. The method and apparatus is particularly adapted to be installed on a web fed printing press equipped for forming perforations in the printed web, the apparatus being located between the perforating and sheeting and stacking stations of the press.

Abstract: Two or more gated type power switches, particularly mosfets, are disclosed in a protection circuit which protects the other power switches should one of them short to its respective gate. The circuit includes elements for sensing the occurrence of the failure, for carrying or diverting excess current from the gates, and increasing the impedance of the gates to minimize any damage. The circuit prevents the failure of one mosfet in a drain to gate short mode from destroying or damaging the other parallel mosfets. The invention results in easier analysis and repair of any damage should a breakdown occur, and for the first time makes practical the use of many mosfets in parallel for power switching applications.

Abstract: A method and apparatus are disclosed for use with a battery powered inverter for powering a load through a ferroresonant transformer. The current flow through the inverter-ferroresorant transformer is sensed and is utilized to modulate the inverter's pulse width at a point, after a peak voltage but before saturation begins, when the slope of the inverter-ferroresonant transformer current with respect to time is at or near zero. A maximum current limiting feature can be provided in the method and apparatus of the present invention.

Abstract: The DC to AC power inverter is of the class B, C, D or E type and includes a battery, at least one power SCR and associated capacitor circuitry, at least one input winding on a main transformer core and at least one output secondary winding on the transformer core. Such inverter requires a quiescent current to establish operating current for capacitor commutation charge and includes a feedback loading circuit for feeding current generated by the quiescent current back to the battery. The inverter also includes a self-detecting load demand circuit coupled to a line from said output winding for cyclically energizing the inverter, for sensing a minimum AC load and for holding said inverter in an energized state until less than a minimum AC load is sensed during an energizing cycle.

Abstract: The cigarette lighter cover is a novelty sleeve for the cigarette lighter which has a tubular body portion with a hollow interior space sized to receive the body of the cigarette lighter of conventional design. One end of the body portion is closed off to form a bottom end of the sleeve. The other end of the body portion is open to receive the cigarette lighter. An image presenting assembly is situated on one side of the sleeve and includes a filmstrip. Opaque portions of this filmstrip have a desired color to provide a portion of an image and a translucent portion has the remaining portion of the image which is caused to appear and disappear. A dark background is situated behind the translucent portion of the filmstrip and a light colored shield is positioned behind the filmstrip and between the filmstrip and the dark background.

Abstract: A cartridge package is provided which may be formed from a single board or blank, and if desired, a transparent piece, the latter providing for an attractive display of the package contents. The cartridge package is constructed to facilitate assembly of the package and the loading of the contents therein, while yet facilitating easy use by the shooter. The cartridge package permits the shooter to conveniently carry the package on his person and/or to easily load the shooter's weapon. To this end, the cartridge package can be carried in one hand while the weapon to be loaded is carried in the other, the fingers of the one hand holding the package being able to readily pluck a cartridge from the package, with the rim of the cartridge passing through the board, and then load it into the weapon.