Abstract: One side of a cabinet drawer shelf is at least partially closed off to prevent storing access while the other side is open for storing microfilm cartridges or other items. A cartridge is of such dimensions as to extend outwardly from the shelf confines enabling ready access for removal and replacement. An elongated pressure exerting retention strip located in the top portion of each shelf is constructed of a flat sheet-like strip of a springlike material having a plurality of transfer slits therein. The strip lateral edges are confined in a pair of spaced apart grooves distending the strip to engage and hold cartridges on the shelf. In another version, a strip of a plastic foam is located on either the shelf top surface with a thin strip of a material having low frictional sliding surface thereon, such as Mylar, for example, being located thereover.

Abstract: An apparatus for dispensing measured quantities of viscous material from a pressurized supply source including a measuring cylinder having a spring loaded piston therein and a rotary valve for alternately communicating the measuring cylinder with the supply source and with a discharge outlet. The rotary valve member has axially spaced O-ring seals to inhibit leakage from the ends of the valve member and an inlet seal for sealing against leakage from the pressurized inlet passage in a direction circumferentially of the rotary valve member.

Abstract: A door latch particularly for use in mobile homes or recreational vehicles. A housing having a channel formed therein is mounted on one surface of a door overlying a passageway therethrough. A spring-loaded slidable latch engagement member is positioned within the channel for operating engagement with a striker plate mounted on the jamb of the frame against which the door abuts when closed. A latch retaining pin is positioned through the housing and has a shaft part extending within the passageway in the door for receipt on the other side of the door surface of an operating knob or handle secured thereon. Rotation of the operating knob actuates the pin to disengage the latch engagement member and thereby unlatch the door. A lockable abutment member may be positioned upon the door surface or an extension part of the housing to block the path of the latch engagement member when moved toward disengagement position and thereby prevent such disengagement.