Abstract: A pressure actuated valve having a diaphragm assembly for receiving any one of a plurality of interchangeable restrictor elements of varying passageway diameter for changing the rate of valve closure and for servicing clogged passageways is disclosed. The valve employs a restrictor element having a selected inlet port diameter with a metering pin slidably mounted therethrough. The diaphragm assembly provides a slidable mounting for the restrictor element to enhance the cleaning action of the metering pin. A method of adjusting the rate of valve closure and servicing clogged or worn restricted inlet ports in such valves is also disclosed.

Abstract: This disclosure provides an apparatus used in combination with an envelope feeder of the type having a frame with a generally horizontal feeder tray and a rack holding a stack of envelopes, the feeder having an endless belt supported on the feeder tray and the feeder serving to deliver envelopes from the stack onto the endless belt, the endless belt moving the envelopes to form a short-height stack at the outer end of the tray where the envelopes may be picked up by a printing press, a flap closure to close the envelope flaps so that open flaps do not interfere with the stacking process, the closure being in the form of an elongated member supported at the feeder tray outer end and having a first upper surface portion inclined upwardly in the direction away from the envelope feeder and a second horizontal upper surface spaced in a direction away from the envelope feeder, the second surface being in a plane parallel to and spaced above the plane of the endless belt.

Abstract: A sprinkler head having a readily accessible top plug which can be removed and replaced by a pressure-reading gauge that is in fluid communication with the head's interior pressure. Each individual sprinkler head includes a manually-adjustable pressure adjusting screw which is accessible at an exposed location for the installed sprinkler head. Pressure adjustment for an individual head, while it is operating in either a manual or an automatic mode, is available. After individual pressure adjustment for a sprinkler head has been performed the gauge is removed and the plug is replaced for normal sprinkler operation.

Abstract: An oscillating sprinkler wherein a body structure carries a discharge nozzle and an oscillating mechanism which effects turning of the body structure in small increments. A control mechanism reverses the direction of movement of the body structure causing the body structure to move back and forth through a preselected arc. The body structure fixedly supports a metal pin on which the oscillating mechanism is journelled. The oscillating mechanism fixedly supports a metal pin in axial alignment with the metal pin on the body structure and the oscillating mechanism pivots on the end of the pin journelled into it with one end of the pin carried by the oscillating mechanism acting as a bearing surface.The pin carrried by the oscillating mechanism is journelled in a support plate that fastens to the body structure. One end of a spring member is attached to the portion of the oscillating mechanism pin that extends through the support plate.