Abstract: A ribbon bookmark which is to be joined to a book by adhesive means and optionally disposed intermediate the tape across the backbone of the signatures and the spine of said book, or on the exposed surface of said spine. Means are provided to facilitate installation of said ribbon bookmark.

Abstract: An adsorption apparatus for the treatment of liquids is disclosed. The apparatus has a separable adsorbent element disposed in a normally drained, dry housing. An adsorbent medium is contained intermediate foraminous members within a hollow cylinder of the element.

Abstract: A controlling and switching mechanism utilizing radiant energy to activate each radiant energy sensitive switching member for applying an energizing pulse to its associated fuel injector of an internal combustion engine; the mechanism using a beam of radiation for each switching member, and having means for optionally varying the relative position of each beam striking its associated member in timed relationship with the operating engine shaft. The duration of an energizing pulse, in degrees of engine shaft rotation, is a function of that part of the switching member illuminated by the beam of radiant energy; the switching members being of sufficient magnitude along at least one dimension so that different parts of each switching member can be exposed to its associated recurring beam of radiant energy.

Abstract: A controlling and switching mechanism utilizing radiant energy to activate each radiant energy sensitive switching member for applying an energizing pulse to its associated fuel injector of an internal combustion engine; the mechanism having at least one element disposed between a revolving or recurring beam of said radiant energy and said switching member which controls the actuating means of its associated fuel injector; said element having an aperture and shutter therein for each switching member so that each aperture and shutter will be in a similar relative position with their associated switching member. The mechanism has means for exposing part of said member to said radiant energy by means of the associated aperture and shutter; the duration of an energizing pulse, in degrees of engine shaft rotation, is a function of the position of that part of the switching member exposed to the radiant energy.

Abstract: A filter-purifier cartridge having a purifier element which can be coupled to one end section of a tubular filter element, or can be adapted to retain filtering means within its hollow core, or be used separately; the purifier element with or without said filtering means, being manually separable from and joined to a top wall member disposed at one end section of said element, the cylinder of that purifier element which retains the filtering means within its hollow core can be adapted to function as the cartridge housing.

Abstract: A filter-purifier cartridge arranged so that a purifier element is inserted into the hollow core of a tubular filter element, said filter element joined to a cartridge end closure; the inlet and outlet passages of the purifier element arranged to permit axial flow through its hollow core containing the purifying medium, in combination with radial flow through the tubular filter element; said cartridge being capable of manual assembly and separation of said elements.

Abstract: A filter-purifier cartridge arranged so that a manually separable and manually replaceable hollow cylindrical purifier element is axially positioned and coupled to one end section of a tubular filter, the purifying medium within said purifier element contained between two removable and replaceable foraminous members, said members being optionally capable of manual removal and manual replacement; the filtering efficiency offered by radial flow through the wall of the filter element combined with an axial flow within the purifier element.

Abstract: A filter-purifier cartridge arranged so that a manually separable purifier element is inserted into the hollow core of a pervious tubular filter, said hollow core communicating with the inlet of the purifier element; the inlet and outlet passages of the purifier element arranged to permit axial flow through the hollow core containing the purifying medium in said purifier element, in combination with radial flow through the tubular filter; the purifying medium within the hollow core of said purifying element being confined between two pervious members.

Abstract: A filter-purifier cartridge arranged so that a self contained purifier element having an integral cartridge end closure at its lower end is inserted within the hollow core of a tubular filter element; the inlet and outlet passages of the purifier element arranged to permit axial flow through the hollow core containing the purifying medium of said purifier element, in combination with radial flow through the tubular filter; said cartridge being capable of manual assembly and separation.

Abstract: A filter-purifier cartridge arranged so that a self contained tubular purifying element is inserted within the hollow core of a tubular filter; the inlet and outlet passages of the purifying element arranged to permit axial flow through the hollow core containing the purifying medium of said element, in combination with radial flow through the tubular filter.

Abstract: A filter-purifier cartridge arranged so that a self contained tubular purifying element is inserted within the hollow core of a tubular filter; the inlet and outlet passages of the purifying element arranged to permit axial flow through the hollow core containing the purifying medium of said element, in combination with radial flow through the tubular filter.

Abstract: A filter-purifier cartridge arranged so that a self contained purifier element is mounted axially at one end of a tubular filter having a hollow core, said hollow core communicating with the inlet of the purifier element, thereby combining the filtering efficiency offered by a radial flow through the filter element with an axial flow within the purifier element.