Abstract: In a hydraulic brake system the fluid slack is maintained at a predetermined volume by a flow control valve that is positioned between a fluid reservoir and a slack adjusting cylinder. The flow control valve closes the fluid path to the reservoir after a chamber in the cylinder fills with a predetermined amount of slack fluid. The flow control valve can be held open with a detent mechanism to permit servicing of the brake system. The detent is automatically released when the brakes are applied.

Abstract: A variable displacement pump has a displacement control cam operably connected to a displacement control cylinder within a pump housing and a pressure and flow sensitive compensating valve is connected to the pump housing for regulating output of the pump. The compensating valve is secured to the pump housing through a spacer block. A lever is disposed partly in the spacer block and partly in a housing of the compensating valve responsive to positioning of the pump cam through a mechanical connection for actuating a sleeve in the compensating valve to incorporate torque-limiting feedback regulation of the pump. An adjustment is operable from an outer surface of the spacer block to limit torsional operation of the lever about a pivot point.

Abstract: This invention concerns a butterfly valve having a resilient, adjustable body seat for the pivoting disc. The seat comprises a T-shaped elastomeric ring which is confined at one end by the transverse wall of an annular groove in the valve body and that another end by a clamping ring which slides along the wall of the flow passage extending through the body. The clamping ring is forced against the seat ring by a plurality of individual screw actuators spaced around its circumference and therefore selected portions of the seat ring can be compressed as needed to produce a leak-free seal around the entire periphery of the pivoting disc. The T-shaped elastomeric ring is held in place solely by mechanical forces in order to permit removal, maintenance, and replacement thereof.

Abstract: Fluid control valve apparatus is provided having a directional control valve for metering passage of fluid from a supply passage to a feeder passage for first actuator. A pressure compensating valve is provided for regulating flow through the directional control valve and for delivering excess fluid to a compensating valve output port for power operation of a second actuator. A main relief valve is connected to the first actuator feeder passage downstream from a metering portion of the directional control valve for sensing a first actuator stall condition. The main relief valve, when actuated, delivers fluid to a tank from a supply passage, through the metering portion of the directional control valve, and a relief passage including the main relief valve upon sensing an overload condition. The rate of flow through the relief passage is subject to limitation only by the metering portion of the direction control valve.

Abstract: A hydraulic system including at least one hydraulic cylinder is provided with an anti-cavitation and overload relief valve having a housing, a first chamber within the housing in fluid communication with one end of the cylinder, and a second chamber within the housing in fluid communication with a fluid reservoir. A fluid passageway within the valve housing connects the first and second chambers. A movable valve assembly is positioned within the fluid passageway for operating in a first mode to block fluid flow between the first and second chambers, for operating in a second mode to permit fluid flow from the first chamber to the second chamber only when the pressure in the first chamber exceeds the pressure in the second chamber by a first predetermined amount, and for operating in a third mode to permit fluid flow from the second chamber to the first chamber only when the pressure in the second chamber exceeds the pressure in the first chamber by a second predetermined amount.

Abstract: A hydraulic control system is provided including a fluid reservoir, a variable displacement pump having a fluid input in fluid communication with the reservoir and having a fluid output, and a fluid actuated displacement control mechanism for controlling the displacement of the pump. A control valve is placed in fluid communication with the fluid output of the variable displacement pump and with the reservoir and is adapted to control the flow of fluid to a fluid actuated device. The control valve includes means for developing a control pressure signal.

Abstract: A fluid horsepower control system is adapted to operate a fluid load by output of a variable delivery pump having a control cylinder governed by a pressure compensated variable orifice connected in multiple with a load sense control valve for causing fluid flow to be inversely proportional to pump discharge pressure and maintaining constant drop across the orifice, without requiring mechanical feedback from the variable delivery pump to the load sense control valve.

Abstract: A pressure gauge has a Bourdon tube element and a pointer mechanism supported on an inner support member which is substantially contained inside the case body of the gauge. The inner support member has a bore in communication with the inner space of the Bourdon tube. The case body has a flattened, outwardly projecting wall zone surrounding a first aperture. An end surface of the inner support member has a contour adapted to the contour of the case wall zone. The matching contours serve to position the inner support member and an outer connection member threads into the inner support member to hold it tightly in place. Seals are provided between the inner support and outer connection members and between the outer connection members and the case body. An air cushion sits on top of the dampening fluid. The air cushion is vented through a vent plug having a longitudinal bore that is terminated by a cross hole transverse to the bore.

Abstract: A document feeder for an electrostatic copier of the type which includes instrumentalities for flash illuminating a document placed by an operator at the illuminating station of the copier. The document feeder includes an evacuatable enclosure having apertured upper and lower walls, and a flexible perforated belt endlessly looped about the enclosure. In addition, the document feeder includes instrumentalities for driving the belt in an endless path of travel including an upper belt run, wherein the belt perforations are disposed in air flow communication with the upper wall apertures, and a lower belt run, wherein the belt perforations are disposed in air flow communication with the lower wall apertures.

Abstract: Photocopying apparatus includes a magnetic brush for applying toner to a copy sheet having a photoconductive coating. The apparatus also includes an illuminating station for receiving a document having an image thereon, a lens system for projecting the illuminated document image, a corona charger unit for placing a uniform electrostatic charge on the photoconductive coating of the copy sheet and an imaging station for simultaneously receiving the projected document image and the uniformly electrostatically charged copy sheet. The imaging station includes a conductive ground plate effective to allow discharge of selected areas on the copy sheet when struck by the projected image to form a latent electrostatic image in accordance with the document image. The magnetic brush places a uniform layer of magnetically and electrically responsive particulate toner material in contact with a surface moved past a magnetic brush peripheral surface.

Abstract: A copying machine in which a photo-receptor sheet, wound between supply and take-up reels, serves as an intermediate web which is charged, exposed and developed with toner; the toner then being transferred to copy paper. The photo-receptor sheet is advanced incrementally from the supply reel to the take-up reel during each copy cycle. After substantially all of the sheet is wound on the take-up reel, it is rewound on the supply reel, following which it is moved once again in incremental steps in the forward direction during copy cycles. The supply and take-up reels are mounted in a highly compact module which is easily plugged into or removed from the base section, without requiring any threading of the photo-receptor sheet over elements within the base section. In this way, practically all that is required during a service call to replace the photo-receptor sheet is to substitute one module with a new photo-receptor sheet for the previously used module with the old photo-receptor sheet.

Abstract: Apparatus for inserting a stack of items into an envelope. A plurality of bank checks are serially fed, counted, and stacked at a receiving and stacking station while simultaneously an envelope is fed to an insertion station. A counter visually displays the number of the counted checks and after a predetermined number have been fed, counted, and stacked, a bank statement is fed and folded and simultaneously an enclosure is fed to the stack of checks at the stacking station by pairs of endless transport belts. A document depressor exerts force downwardly upon the folded statement, enclosure, and plurality of checks, pressing those items into a compressed stack whereupon a ram carrying an adjustable finger moves forward between the document depressor and compressed stack of items. The finger carried by the ram abuts against the long edge of the stack to insert the stack into the envelope at the insertion station.

Abstract: A sheet jogger to justify and align a stack of sheets into a registered bundle which is subsequently discharged into a bin. Prior to discharging of the bundle, the stack of sheets can be stapled. Each bundle is offset from every other bundle when discharged into the bin. Sheets are fed onto a jogging deck by at least one conveyor roller to abut against at least one gate finger at the end of the jogging deck. A back jogger aligns the sheets into registration against the gate finger and a left side jogger assembly jogs the sheets into alignment against a right side jogger assembly. The gate fingers drop down and a lower eject roller rises above the jogging deck to engage a bottom sheet of the stack thereby engaging the stack against an upper fixed pressure roller.

Abstract: Document handling device for placement onto an existing reciprocating document carriage of a photocopy machine to provide support for photocopying documents such as billing statement ledger cards. The document handling device is of one piece construction having a recessed inclined staging tray for storage of documents prior to photocopying, a steeply inclined surface portion with document retainer surface projections for separating and feeding of documents, a transparent document exposure access to coincide with a transport window of the reciprocating document carriage, and a recessed inclined stacker tray for storing documents which have been photocopied. The document handling device has two bottom projections to fit into existing indentations of the reciprocating document carriage and a cutout portion to accommodate a copy sheet length selector knob located on the reciprocating document carriage.

Abstract: An apparatus for automatically and incrementally feeding a continuous fan-folded document to be copied having interconnected segments over a bed plate of a flash illumination photocopier for sequentially positioning each document segment on the bed plate. A drive assembly engages and moves the document having a motor supplying motive power to the drive assembly. The motor is coupled to the drive assembly through a clutch that controls the supply of motive power. A brake is coupled to the drive assembly to stop document movement when the clutch is disengaged to position each document segment on the bed plate. A control mechanism automatically engages the clutch and releases the brake to feed a subsequent document segment to the bed plate after a copy run of a given document segment has been completed. Engagement of the clutch and release of the brake is initiated simultaneously with the last flash in the copy of the photocopier illuminating strobe lamps.

Abstract: A combined document cover and document storage assembly for a copying machine which copies both flat sheet documents and thick book documents. The document cover is hinged to the copyier along the edge remote from the operator so that the operator lifts the cover in an upward and rearward arcuate movement. The cover has a document holding pocket along the upper rear edge thereof for receiving the edges of a stack of documents placed on the cover to hold the documents in place when the cover is lifted, the pocket having a slanted wall in order to cause the documents to overlap each other by a small amount to facilitate grasping the uppermost document.