Abstract: Refractory material is applied to the interior surface of a vessel by advancing a boom carriage on a frame positioned externally of the vessel through an opening in the vessel. The boom carriage supports a collapsed telescoping mast and a nozzle boom. The carriage supporting the mast and nozzle boom is advanced through the opening to an elevated position within the vessel. At the end of travel of the boom carriage, the telescoping mast is pivoted through approximately 90.degree. to a vertical position and the nozzle boom is pivoted to a position perpendicular to the mast. The mast is progressively extended as the nozzle boom is rotated and refractory material is sprayed from a nozzle assembly on the end of the boom onto the vessel interior surface. The nozzle boom is transversely and pivotally movable on the mast to adjust the position of the nozzle assembly to follow the irregular contour on the interior surface as the mast is telescopically advanced or retracted.

Abstract: A leaf spring suspension at the rear of a vehicle is lowered on a vehicle frame by relocating the leaf springs below an axle housing that extends between rear wheels transversely on the frame. A spring pack connects the lowered leaf springs to the axle housing The spring pack includes a saddle having a recessed portion for receiving and supporting the axle housing on the leaf springs. The saddle recessed portion is positioned between the axle housing and the leaf springs. A first spring plate is positioned below the leaf springs underlying the saddle. A second spring plate is supported by the saddle above the axle housing. Hex head bolts with threaded ends extend through aligned holes in the first and second spring plates. Nuts are tightened on the bolts threaded ends below the first spring plate to tension the bolts and clamp together the leaf springs and the axle housing with the weight of the leaf springs transferred by the spring plates clamped to the saddle to the axle housing.

Abstract: A valve body pressure formed from pipe components includes an annular portion for receiving a ball closure member. A pair of conduit portions are connected to the annular portion and the ball. A stem housing for rotatably supporting a valve stem extends up from the annular portion. The stem housing, annular portion, and conduit portions are welded to form the unitary valve body. The conduit portions are integrally connected to end fittings adaptable to connect identical or different grades of polyethylene pipe or metal pipe to polyethylene pipe. The internal surface of the conduit portion includes gripping teeth and O-ring seals that frictionally and sealingly engage the surface of the polyethylene end fitting. The valve can include a metal end fitting and a polyethylene end fitting. The polyethylene end fitting is connected by butt fusion or electrofusion coupling to polyethylene conduit, generally 6 inches in diameter or larger for use in a natural gas distribution system.

Abstract: A shop towel is wrapped around a retainer having a base with a ratchet bar extending upwardly from one surface of the retainer base. The ratchet bar extends into a recess of a handle of a body portion having a contoured surface for receiving at one end the retainer and at the opposite end the hand of an operator. The ratchet bar is advanced into engagement with a spring actuated-pawl that extends transversely through the handle body portion. The pawl is axially movable in the handle and maintained by a spring in engagement with the ratchet bar. The ratchet bar is freely advanced into the recess and engaged by the pawl to maintain the retainer movably connected to the handle body portion. The engagement of the pawl with the ratchet bar prevents the retainer from being inadvertently disconnected from the handle until the pawl is pulled by a lever out of contact with the ratchet bar.

Abstract: A masking guide includes a plurality of masking frames each having a different peripheral dimension for positioning the frames concentrically one within another in a nested arrangement. Each masking frame has an aperture and the dimensions of the aperture vary from a base frame having an aperture of greatest dimension to an innermost masking frame having an aperture of the least dimension. The masking frames are positioned so that the dimensions of the apertures progressively decrease from the base frame to the innermost frame. The frames are pivotally connected one within another, permitting the frames to be raised and lowered relative to a proof. A photographic proof is positioned in underlying relation with the masking guide. The proof has a full print area which is exposed entirely through the aperture of the base frame. The remaining frames mask a selected portion of the full print area of the proof.

Abstract: Finished envelopes are conveyed in a feed line of an envelope forming machine aligned in spaced apart relation to a spiral delivery mechanism that transfers the envelopes on edge to the surface of a delivery table. A conveyor on the delivery table sequentially advances the envelopes in a stacked relation from a receiving end portion to a discharge end portion where a predetermined quantity of stacked envelopes are periodically removed from the table as envelopes are added to the stack at the receiving end portion of the table. The envelopes are maintained in a compact stack by a stop member which is normally biased toward the receiving end portion of the table by an actuator mechanism. The stop member exerts pressure on the stack as it advances upon the addition of envelopes from the receiving end portion to the discharge end portion.

Abstract: A protective liner is secured to a truck cargo bed by a plurality of one-piece resilient fasteners each including a bearing plate and a clamp member. The bearing plate and clamp member are integrally formed with the clamp member extending perpendicularly from the bearing plate. A lever arm extends from a peripheral edge of the clamp member toward the bearing plate to a free end portion removed from contact with the base plate. The lever arm is normally spring biased downwardly away from the bearing plate. On installation the clamp member is projected through an opening in the liner with the peripheral edge sliding over the edge of the liner around the opening. As the clamp member advances through the opening, the lever arm slides on the liner edge and is urged upwardly toward the bearing plate to allow the clamp member to pass through the opening. The pivotal movement of the lever arm allows the bearing plate to be compressed against the liner without flexing the bearing plate relative to the clamp member.

Abstract: A boom mounted cutter drum assembly of a continuous mining machine includes an intermediate drum section and a pair of end drum sections. Spray nozzles on the cutting elements of the cutter drum assembly direct liquid spray at the mine face as mine material is dislodged to suppress dust and frictional ignition. Liquid for the spray nozzles is supplied on the mining machine through a stationary housing positioned between the intermediate drum section and the end drum sections. Water is conveyed through ports in the housing to a rotary seal assembly having stationary and rotating components. The ports are sealed by O-rings which communicate with passageways that divert liquid leakage at the rotary seal assembly away from the gearcase. The rotary seal assembly is surrounded by lip seals in the gearcase to separate the liquid passageways to the spray nozzles from the lubricant supplied to the gearcase.