Abstract: The dogging device comprises a detented dogging hook, for engaging a latching and unlatching control rod of a panic exit latch and actuator assembly, or a like assembly, and comprises means for selectively changing the operator-implements thereof from one type to another. The method comprises the steps of forming such a changeable dogging device. The kit sets forth the components parts cooperative with a basic dogging device for adapting the latter for use with any one of a plurality of operator-implements.

Abstract: The mechanism, designed especially for use in an earth compacting drum, comprises a pair of concentrically-arranged, eccentrically-weighted elements, which are rotated in unison by means of a hydraulic motor. The mechanism is housed within an earth compacting drum, and the one eccentrically-weighted element is translatable, axially, and disengageable from a splined coupling, in order that it may be indexed to different rotary positions relative to the other eccentrically-weighted element. In this manner, vibratory amplitudes may be increased or decreased.

Abstract: The mine roof plate comprises a rigid, sheet steel element of substantially uniform thickness having a domed section which reinforces the plate against distortion. The domed section is at least partially of generally quadrilateral configuration, having a substantially square base and defines an elevated section having an aperture therein circumscribed by a generally planar land surface. The periphery of the plate is of planar, rectangular configuration and disposed in spaced parallel relationship to the elevated section. The configuration of the domed section, in having right-angular corner portions, defines thereby reinforcing ribs, along the domed section, which terminate at the planar periphery of the plate.

Abstract: The invention comprises a latching and unlatching device for use on a door, or bulkhead, or the like, which device has a blocking plate for internally obstructing the latch to prevent its retraction, thereby to prevent the opening of the door. The blocking plate is internally secured in place, in an intermediate slidable position, where it does not obstruct the latch, by a low melting point cover. In the presence of excessive heat, as on the occurence of fire, the cover melts; this allows the blocking plate to slide to another, operative position in which it prevents the retraction of the latch and, consequently, the unlatching of the device. The method comprises the steps to be undertaken to modify an off-the-shelf latching and unlatching device to insure that it will be held securely latched in the presence of fire or excessive heat, and the kit sets forth the structure elements required for the aforesaid modification of off-the-shelf, latching and unlatching devices.

Abstract: In the preferred embodiment, the invention comprises a sealing arrangement in which an elongated slat-type seal is provided for slidable engagement within the slot of a rotor (such as a Wankel engine-type rotor, or the rotor in a vane-type compressor) and includes a leaf spring for biasing the seal outwardly from the slot to effect fluid sealing externally of the rotor. The leaf spring and seal have special, mutually-engaging keying configurations, and the spring has particularly determined contact points which maintain all possible biasing force therein for the longest service time thereof.

Abstract: The machine comprises a housing with parallel intersecting bores in which two pair of lobed rotors are rotatably mounted. The housing has high-pressure, end ports which are occluded and exposed by one rotor, i.e., a gating rotor, of each rotor pair. The gating rotors and their paired, co-acting rotors, i.e., main rotors, have different-sized hubs. The gating rotors have the larger-diameter hubs to control the high-pressure end ports. The rotor pairs are so configured and dimensioned as to insure that each pair defines a constant and uniform clearance therebetween in all rotary positions, and provide a machine having an optimum performance.

Abstract: The device comprises a latching assembly enclosed within, and translatable relative to, a centercase housing; the housing is mounted on a chassis. The device is adapted for cooperative engagement with a locking cylinder, for actuating the latching assembly, and for operation of a thumbpiece lift, by an ancillary, external, trim linkage, for translating the latching assembly. The latching device has a master, locking cylinder cam or dowel, the latter having a removable screw, which (through a locking cylinder) either operates a night-latch cam plate, to translate the latching assembly or, upon removal of the screw, allows the cam or dowel to translate a tumbler which, in turn, frees a thumbpiece lift, for operation (then) of the latching assembly by the lift, instead of by the cam plate. Accordingly, with the drive screw in place, the external, operating trim linkage can not operate the device; it must be unlatched, externally, by a key in the locking cylinder.

Abstract: According to a depicted embodiment thereof, the novel earth bit comprises a shank having a threaded end and a bit head centrally bored and threaded to receive a shank. A stack of apertured discs, however, is interposed between the threaded bore or cavity in the bit head and the threaded end of the shank. The discs intimately engage, and bridge between, the shank and bit head threads, and communicate torque therebetween. The bit head cavity has a bearing surface or land upon which the discs are supported, and the shank has an annular shoulder which bears upon the stack and, thus, compressive forces are communicated from the shank to the bit head. The bit head, of the invention, then, comprises the aforesaid bit head, having the stack of discs secured therein by a retainer, for use, in a plural-part earth bit having a threaded shank.

Abstract: The invention concerns helical- or screw-type driving and driven rotors having lands and intervening grooves for coacting engagement, within a housing of a machine, such as a gas compressor or expander, the rotors having improved, more efficient, profiles. The profiles are defined with contiguous elliptic and involute sections to improve the pressure angle, and the profiles are configured to define rotor-to-rotor sealing surfaces in closure of a compressed gas pocket in which, the pocket gas pressure always urges or torques the driven rotor in the positive or forward-rotary direction.

Abstract: The invention concerns the formation of the high pressure port in a rotary, positive displacement machine, such as a gas compressor, with an extension which is traversed by the plane on which the parallel axes of the rotors are commonly positioned. A given portion of the port extension is constantly occluded by the gating rotor and, consequently does not add to the effective area of the port. However, the remaining portion of the extension is exposed by the gating rotor, effectively defining a port opening which reaches to the common plane. Thus, in gas compressor use of the machine, the port extension insures that all the compressed gas product is delivered through the exhaust port.

Abstract: In the preferred embodiment depicted, the invention comprises a limb, having a depending lug, fixed to a door. The lug makes a close clearance, near engagement with a socket-retainer fixed to a door-interfacing mullion. The upper end of the mullion is foreshortened, and addressed to a free space; it is slidably engaged with an internal socket. Accordingly, in the event of fire, the mullion may freely extend vertically, due to the heat. Such free extension causes the socket-retainer, and the depending lug, mutually to engage. By this arrangement, the door is secured closed, on the exposure to severe heat, even if the normal latching and/or locking device therefor comes loose or disengaged. The method comprehends fixing the mullion at one end, securing it against angular movement, exposing the other end to a free space, and mounting to the closure and mullion locking components which come into engagement only in response to thermal extension of the mullion.

Abstract: The friction rock stabilizer comprises an elongate element for insertion into an earth structure bore, for stabilizing the earth structure, which has a sheath rendering the stabilizer impervious to chemical attack and, hence, corrosion-resistant. The bore surface isolating method, in an embodiment thereof, comprises interposing a protective or isolating sleeve or lining between the stabilizer and the earth structure bore. The protective or isolating lining provides two benefits: it facilitates movement of the stabilizer into frictional engagement with the bore, by isolating the stabilizer from the rough surface of the bore wall, and also provides a corrosion-resistant sheath to protect the stabilizer, in the bore, from alkaline or acidic mine water, corrosive minerals, and the like.

Abstract: The invention comprises incorporating in the wall of a typical unloader valve for a compressor, a normally-closed, pressure-responsive valve for admitting product compressed air therethrough, into the valve chamber, for re-circulation of the admitted air through the compressor. In the first embodiment illustrated, a pilot air pressure, which modulates the unloader valve throttling piston, is also addressed to a passageway which opens onto the normally-closed valve. When the pilot air pressure is substantially elevated, the normally-closed valve opens.

Abstract: The method involves conducting the gas through a plurality of particulate matter separating stations, serially. In each station the gas is centrifuged in an annular channel and then turned inwardly, to leave particles behind and conduct the particle-removed gas away therefrom. In the successive stations, the gas is centrifuged or swirled with differing force levels, and particles of differing sizes are separated out.The apparatus comprises a vessel in which are positioned a plurality of serially arranged separating stations. Each station has vanes for imparting a swirling, centrifugal motion to gas introduced into the vessel, and annular channels along which to conduct the swirling gas. Each station has a central, slotted tube, concentric with the channel, through which to vent the particle-separated gas, and the annular channels have terminations which define repositories for separated particles.

Abstract: An embodiment of the invention comprises a pneumatically operated regulating valve having porting therein for venting therethrough the pilot-signal, pressured fluid which is normally conducted to the front clutch internal control valve of a power transmission. The regulating valve is in communication with a source of pneumatic pressures. When the pneumatic pressure of the source is elevated, it causes the regulating valve to vent the pilot-signal, pressured fluid. Resultantly, the transmission is prevented from going into its lock-up mode and, instead, remains in its converter mode. The method sets forth the steps of modifying a standard transmission, without altering the latter's as-built configuration and arrangement, to incorporate the novel controlling means.

Abstract: According to an embodiment thereof, the stabilizer set comprises a first, basic, friction rock stabilizer for insertion into a bore formed within an earth structure, and a second, supplementary, friction rock stabilizer, having an annulus for supporting a roof plate, for insertion into the first stabilizer for frictional engagement therewith to provide (a) yieldability of the roof plate and/or (b) reinforcement of the first stabilizer. The methods of the invention, then, comprise inserting a supplementary friction rock stabilizer into a first-inserted friction rock stabilizer in order to reinforce the first, or to provide a necessary yieldability when it is anticipated that the roof plate may become unduly loaded.

Abstract: The invention comprises a positive fluid displacement apparatus of the scroll-type described as a fluid compressor in the exemplary embodiment. The embodiment has single fixed and movable scroll elements in which the latter describes orbital movement relative to the former to form variable volume pockets therebetween which move from an inlet to an outlet. To accommodate for a difference in thermal expansion between the innermost and outermost zones of the apparatus, the scroll elements are formed with varying thicknesses along the lengths thereof. Accordingly, centrally of the apparatus, whereat an exhaust port is formed, scroll element thicknesses are greatest, the compressed fluid is most dense, and the thermal expansion is least, the elements define close, substantially sealing minimum clearances of a given measure.

Abstract: The system comprises a conventional oil/gas separator, with an oil supply line extending from the separator oil reservoir for conducting oil to a machine (such as an associated gas compressor, or the like), and a gas/oil vapor line communicating with the gas chamber of the separator, for conducting oil vapor-laden gas thereto (from such a compressor, or like machine). In an embodiment of the improvement, a check valve is interposed between the oil supply line and the reservoir to prevent oil flow from the line to the reservoir, and a by-pass line, having a pilot-pressure-closed, normally-open valve interposed therein, is coupled between the oil supply line and the gas chamber. The valve senses chamber pressure and, when the latter is sufficiently diminished, opens the by-pass line to evacuate the oil supply line (and oil cooler and filter) into the separator.

Abstract: The invention comprises a control valve which is interposed between a hydraulically-operated fuel valve (for an engine) and a hydraulic fluid supply for regulating the operation (i.e, the opening and closing) of the fuel valve. The control valve has a housing-enclosed, sliding plunger which is spring-loaded to urge the plunger in a first direction in the housing, and which is translated in a second, opposite direction against the spring bias, by a contacting, rotating cam. Hydraulic fluid inlet and outlet ports are formed in the housing and are cyclically communicating and closed off from each other, for given periods of time, due to the translations of the plunger. The housing has an adjusting element operative for altering the translation of the plunger relative to the housing, to alter the given time periods and, as a consequence, the fuel valve is selectively and adjustably regulated thereby.

Abstract: The invention, according to a depicted embodiment thereof, is incorporated in a scroll-type compressor. The compressor has a drive shaft which terminates in an eccentric socket. The socket, serving as a journal, slidably engages a hollow hub centrally located on the moving or orbiting scroll element. The hub comprises the bearing surface for the shaft socket/journal. A lubricant channel is formed in the orbiting scroll element, and it opens into the hollow of the hub. Lubricant travels, by gravity, from the channel along the inner surfaces of the hub toward the lower side of the hub and socket engaging surfaces. In order that a supply of lubrication will be on hand, with initial start-up of the machine, a ring is fitted into the outer end of the hub to define a dam. The dam wells up with lubricant during a first operation. Thereafter, it displaces lubricant therefrom, with each succeeding start-up of the machine, to the socket and hub interface.