Abstract: The arrangement comprises means for mounting a rotary type seal, especially a mechanical seal of the dry face type. According to an embodiment of the invention a seal mounting has a substantially circular recess in which a rotary dry face seal is received. Means (not shown) such as a key and keyway, or the like, causes a rotation of the seal mounting in common with a rotary shaft. The mounting disposes the rotary dry face seal for mechanical face sealing with a fixed seal member. The mounting recess has a circumferential inner surface which is out of round, and correspondingly the external periphery of the dry face seal is out of round, the two defining a slidable engagement therebetween. The eccentricity of the cooperating elements causes the seal mounting to engage and carry the sealing element therewith in rotation, in response to shaft rotation, obviating any need to dowel-pin the two elements together.

Abstract: This invention relates to a pipe joint sealing device. The device includes an annular resilient body of rubber which is generally V-shaped in cross-section which defines inner and outer annular flanges or body portions. This annular body or rubber ring is fitted into the opening of a rigid concrete structure, such as a manhole, in fluid-type engagement therewith. This engagement is interlocking which prevents the accidental dislodgement of the rubber ring from the opening, and is achieved b casting the concrete into lockingengagement with the outer peripheral surface of the ring, this ring being provided with an annular anchor portion which in cross-section is of keystone shape.

Abstract: A hydraulic damper for controlling the lag-lead movements of a helicopter rotor blade has dual oil seals on its piston rods. A fluid conduit connects the area between the seals to the area beneath the piston of a cylinder-and-piston type indicator and also through a fluid restriction back into an open fluid system. A bypass conduit is extended from the fluid conduit on the downstream side of the restriction to the area above the indicator piston so that any back pressure in the fluid system which creates a pressure rise of the other side of the restriction also acts on the upper end of the indicator piston.

Abstract: A system for driving a flexible magnetic disk including a direct current stepper motor having a shaft directly connected to the disk drive hub. Motor controller means activate the motor to bring it from rest up to a desired speed, e.g., 360 rpm, and thereafter maintain the speed constant. The motor controller initially provides a detent pulse to move the rotor to a starting position and then provides pulses of decreasing duration and increasing frequency to accelerate the motor to the desired speed.

Abstract: A shaft sealing apparatus has a housing having axial symmetry about the axis of a shaft disposed therethrough. A seal ring supporting member is slidably disposed about the shaft and is enclosed by the housing. Seal rings are disposed in the seal ring supporting member. A means for moving the seal ring supporting member along the axial direction is provided so that the amount of overlapping area between the seal rings and a sealing portion of the shaft may be controllably varied.

Abstract: Disclosed herein is a metallic V-ring sealing member capable of sealing hydraulic fluid against egress from a hydraulic system. The sealing member of the invention is fabricated from a metal capable of undergoing an austenitic to martensitic state change upon cooling below a transition temperature and of undergoing a further transformation from martensitic to austenitic state upon warming to a temperature of less than the operating temperature of the system. By the process of the invention, a hydraulic system may be sealed by cooling the sealing member of the invention below its transition temperature, placing the sealing member in sealing relationship to the parts of the system to be sealed and warming the sealing member to effect a transformation from its martensitic state to its austenitic state.

Abstract: A nonrotatable seal assembly is provided for use with a conventional pillow block housing to form a positive barrier to prevent the entry of foreign contamination. The seal assembly has a thin body portion provided with two peripheral grooves each adapted to receive a rib on a wall of the pillow block housing with a deformable sealing member on the outer periphery of said body portion between the grooves. Said seal assembly has a pin extending into the wall of the pillow block housing to prevent relative rotation therebetween. A thicker body portion of the seal assembly contains a lubrication recess between first and second seals with a conventional lubrication fitting communicating with said recess.

Abstract: A cylinder head gasket for internal combustion engines comprises at least one layer of a soft material having pores which are enriched with an impregnating agent and edges which are bordered by a casing. The pores of the soft material underneath the flange are kept free of impregnating agent.

Abstract: An improved sextant which provides a very accurate angular measurement of the position of a celestial body relative to the horizon. The sextant is a typical prior art sextant having a horizon glass and an index mirror, and wherein the sextant is sighted by adjusting the angular position of the index mirror to align an image of the celestial body with a sighting of the horizon. An angular position encoder is coupled to the index mirror to provide a digital electrical output signal indicative of the exact angular position of the index mirror. The sextant includes an electrical clock for producing an electrical output signal which indicates the exact time the sighting is taken. The sextant includes electronics for automatically synchronizing the electrical output signal from the encoder with the electrical output signal from the clock.

Abstract: In a mechanical seal with rubbing slide ring and counter ring elements, an annular distributor guiding element which defines the annular channel guiding coolant and lubricating liquid to the interface between the elements is axially displaceable between limiting stops. The distributor guiding element tapers inwardly to define an inner orifice closely surrounding one of said ring elements or a ring form holder therefore to define an annular passage which constitutes a liquid flow regulating area.

Abstract: A fluid-tight packing for relatively moving parts, for example, slide valve parts, comprises an active portion for disposition adjacent a first part of the moving parts with which it is in relative movement and a further or base portion fixed relatively to a second part of the moving parts, the active portion being articulated on the base portion so that when, in operation, the active portion tends to be moved in consequence of relative movement between the moving parts, it moves with respect to the base portion thereby enabling the zone of contact with the first of the moving parts to be changed and enabling lubrication to be re-established, the active portion being of substantially part-circular section and having its center located approximately at the point of articulation between the active and base portions.

Abstract: The sealing structure comprises an annular sealing member disposed in an annular recess in a ring fixed to the non-rotating casing of a centrifugal casting machine. The sealing member bears sealingly against an annular radial flange connected to rotate with the rotary mould of the machine. An elastically yieldable annular chamber is interposed between the inner end of the recess and the sealing member. A source of fluid under pressure is connected to the inside of the chamber to expand the latter and urge the sealing member against the flange.

Abstract: A seal ring for sealing an annular space between two telescoped and relatively movable parts. The ring seats in a groove in one of the parts, and leaf springs urge the seated ring against the other part to effect the seal. The leaf springs include annealed or reduced-cross-section portions which provide relatively low-rate and long-travel spring characteristics to accommodate tolerance variations, dimensional changes of the ring as wear occurs, and thermal expansion or contraction of the sealed parts. The wearing surfaces of the ring may be covered by a plastic cap or anti-galling coating.

Abstract: A seal suitable for use in a barrel-type rotary machine having an inner casing mounted within an outer casing to provide a chamber therebetween which is pressurized by exposing the chamber to high pressure fluids processed in the machine. One end of the chamber is substantially enclosed by a pressure responsive resilient member. One end of the member is secured to the inner casing and the opposite end thereof arranged to support a sealing element in non-contiguous relation adjacent to the inner wall of the outer casing. As the chamber is pressurized, the resilient member is forced outwardly toward the outer casing to securely seat the sealing element in positive fluid-tight engagement thereagainst.

Abstract: Device for sealing the end of a sheath pipe that protects a main pipe therein, comprising a pair of sealing rings arranged in face-to-face relation, a pair of flanges oppositely placed at the outside of said sealing rings, all these sealing rings and flanges being tightened with bolts into a unit, each sealing ring being made of flexibly elastic material having a cup shape cross section.

Abstract: An automatic return apparatus for the pick-up arm of a record player including a cam plate for lowering the pick-up arm at the beginning of playback and for returning the arm at the end thereof. A crossed cam is rotatably mounted on the plate to engage the pick-up arm when it is being returned to its rest position and effect disengagement thereof at all other times. A four-armed lever for effecting various functions such as holding the cam plate in position during playback, actuating a muting switch during the return of the pick-up arm to its rest position, initiating the return of the pick-up arm return and resetting the apparatus for the next return of the pick-up arm is also provided.

Abstract: A seal for the upper ends of waterwell casings includes a pair of cup-like devices, one inside the other, which extend over the end of the casing, and a central shaft which urges the cup devices apart to expand a rubber seal ring tightly against the outer periphery of the well casing.

Abstract: A large copy projector, in which the presence of elevated optics in front of the screen is avoided, uses opaque sheeting that is adapted to receive related graphic matter on its upper and lower faces. Simultaneously, the upper face is unobstructedly available for direct observation and manual access, and the lower face is unobtrusively available for image projection through a folded optical path below the opaque sheeting and a projection lens positioned elsewhere than directly over the copy. The copy is characterized by a lower specularly reflecting face that is accessible to the optical system from below but that can be marked from above by chemical etching from a user's pen or the like.

Abstract: A visco-type seal is disclosed wherein a sealing pressure is built up in a fluid by means of one or more helical windings, the fluid being enclosed in a narrow clearance between a stator and a rotor. The alignment of the rotor within the stator is insured by providing a thin layer of material at the outer ends of at least one of the helical windings so that the clearance in a radial direction between the stator and the rotor at this location is less than the clearance existing in a radial direction between the helical windings and the stator. In one embodiment, the stator is designed as a sleeve which has a flexible connection in the radial direction with respect to a wall. The stator or a sealing element fastened thereto is movable in an axial direction by means of a resilient force to obtain a proper sealing when the device is at rest.

Abstract: A trolling depthometer is provided in the form of a small, clip-on device for fastening to the end of a fishing pole. Preferably, the device is made in two parts so it can be readily disassembled and carried in a tackle box.