Abstract: 1. A reserve battery comprising a cell, spaced electrodes in said cell, a lling aperture in said cell, a frangible sealed ampule containing electrolyte, a plunger adjacent said ampule, a conduit between said ampule and said cell aperture, a body of sealing material, and means for moving said plunger into contact with said ampule to crush same and force electrolyte through said conduit and aperture into said cell, said means being so constructed and arranged that upon further motion of said plunger the body of sealing material is disposed across the aperture to seal same.

Abstract: A colorimeter includes an objective for focusing an object image on a first half of a viewing screen. A standard light reference beam is projected onto the second half of the screen. A moving shutter alternately blocks the first half then the second half of the screen. A light detector is responsive to the alternating images on the screen as they pass through color filters. The detector output may provide information of spectral distribution or color deviation of the object, relative to the standard reference.FIELD OF THE INVENTIONThe invention generally relates to colorimeters, and more particularly to a colorimeter for measuring color and spectrum distribution, based on the formation of an optical image of an object prior to measurement.BRIEF DESCRIPTION OF THE PRIOR ARTThe "narrow" definition of color flows from the rules set down by the C. I. E. (International Commission for Illumination) for the measurement of color on flat, uniform, opaque surfaces.