Abstract: An improved mainshaft gear retainer assembly (66, 68) for a twin countershaft (18, 18A) transmission (10) having at least one pair of floating mainshaft gears (44-46, 48-50) positioned close together in groups of two and clutchable to a mainshaft (40) one at a time by positive clutches (54, 56, 58) is provided. The improved mainshaft gear retainer assembly prevents axial movement of the two closely positioned gears and reacts the axial forces on a clutched one of the mainshaft gears toward and away from the other mainshaft gear to the mainshaft by means of thrust surfaces (78, 124, 126, 128, 130, 132, 134, 136) which are all rotating, or tending to rotate, at the same speed as the clutched mainshaft gear and the mainshaft. The gear retainer comprises relatively simple components and allows easy assembly and disassembly of the mainshaft gears and gear retainers from the mainshaft.

Abstract: An electrothermal responsive protective mechanism for an electrically powered load wherein the overload tripping force is provided by the cool, ambient temperature compensating bimetal (12) rather than the hot electrically heated bimetal (6) to prevent over-stress. The bimetal members (6,12) are preloaded by a link actuator (22) having a positive temperature coefficient of expansion to minimize unloading of the bimetal members due to ambient temperature change thereby to prevent tripping motion. A screw (16) adjusts the preload and a screw (24) provides a coupling gap in the tripping linkage to prevent shock or vibration propagation therethrough. An insulating base (2) and carrier (14) provide thermal and electrical isolation of the bimetal members. Identical bimetal members (6,12) are used to prevent any actuator motion under ambient temperature changes.

Abstract: A heating and air conditioning control system having a compressor clutch cycle control feature for controlling the in-car temperature of a vehicle passenger compartment is disclosed. The system comprises an automatic temperature control (ATC) sensor (32) which provides a modulated vacuum control signal for a vacuum motor (38). The vacuum motor has an output which adjusts a biasing element in an electrical switch (82), resulting in on/off duty cycling of an electrically energizable clutch (28) which transmits power from the vehicle engine to the air conditioner compressor (26). The percentage of time that the compressor is on versus the time off is a function of the control signal which is, in turn, a function of the ambient, in-car, and manually selected set point temperatures sensed by the ATC sensor.

Abstract: A multiple substantially identical countershaft powershift transmission is provided. The transmission (10) comprises an input shaft (12) and preferably three (16, 18 and 20) input gears and an output gear (22) concentric and rotatable relative thereto. A plurality of substantially identical countershaft assemblies (42, 42A) carrying countershaft gears (54, 56, 58 and 60) constantly meshed with the input gears and output gear surround the input shaft and an output shaft (24) generally coaxial with input shaft (12) and carrying the output gear (22) rotationally fixed thereto are provided. A first double acting friction clutch mechanism (26) for selectively frictionally coupling first speed input gear (16) or third speed input gear (18) to the input shaft and a second double acting friction clutch mechanism (28) for selectively coupling second speed input gear (20) or fourth speed output gear (22) are provided and are concentric and driven by the input shaft (12).

Abstract: A universal 3-wire switch module is provided for normally open and/or normally closed load control modes. The universal switch module is field convertible from P type DC to N type DC to P type AC to N type AC configurations as programmed by installation wire connection, without internal changes to the switch module. A single switch module replaces the prior dedicated switch modules used for the various configurations. The switch module is further characterized by its versatile application to a wide range of voltage.

Abstract: A two-speed gerotor motor is disclosed of the type including a rotary disc valve member (55) of the type including valve passages (71 and 69) communicating between the inlet and outlet ports (61 and 65), respectively, and the fluid passages (57) defined by the port plate (19). The valve (55) also defines control valve passages (73) which communicate with an annular groove (75). Adjacent the valve member (55) is a valve seating mechanism (83) including a balancing ring member (85) which defines a plurality of axial passages (89) providing communication between a control fluid port (77) and the annular groove (75). As a result, the control valve passages may be communicated selectively with either the expanding volume chambers (29E) or the contracting volume chambers (29C).

Abstract: A rotary fluid pressure device is disclosed of the type including a gerotor displacement mechanism (17), a rotary valve member (55), and a valve seating mechanism (75). The valve seating mechanism includes a balancing ring member (77) seated in an annular groove (81) defined by the valve housing (21). Leakage fluid from the gerotor displacement mechanism passes from the central case drain region (83) through the bearings (33 and 35) to an annular chamber (87). The leakage fluid is communicated from the annular chamber (87) to whichever of the ports (75 or 61) is connected to the system reservoir, through a series of fluid passages (131, 133, 135, 137, and 139). The fluid passage (139) communicates with the annular groove (81), and the leakage fluid flows past whichever of the balancing ring seals (143 or 145) is subjected to low pressure fluid, the balancing ring seal thus acting as a check valve. The invention eliminates the complicated and expensive prior art check valve assemblies (103, 105).

Abstract: An add-on fault indicator comprising a magnetic reed switch (22) and a lamp (24) connected in series across relay contacts (10, 12, 14) with the reed switch mounted by a clamp (34) contiguous to the outer surface of the metal coil shell (6) so as to be closed by the magnetic field when the coil (2) is energized. A normal operation indicator lamp (26) is connected in series with the relay contacts to indicate closure of the latter to energize a load (20). Fault indicator lamp (24) lights if the contacts do not close when the coil is energized but is shunted by the contacts to remain unlighted when the contacts close properly.

Abstract: A water valve is disclosed for use in passenger vehicle heating systems. The valve includes a cylindrical metallic socket having a heat accepting surface portion connected to the valve housing and in fluid communication with fluid flowing through the valve. The position of the heat accepting surface portion relative to a rotatable butterfly valve member results in a vortex flow condition across the face of the heat accepting surface portion, thereby providing fast heat transfer from the fluid to the socket.

Abstract: A molding process for molding an elongated elastomeric member (60) with wire mesh sleeves (16) bonded to the ends (14). A molding preform (10) of elastomeric material is positioned within a seamless mold cylinder (26), and the open ends of the wire mesh sleeves (16) are mounted to end plug assemblies (30) slidably received into the mold cylinder (26) and positioned against the ends (14) of the preform (10). A specialized profile is formed into surfaces (44) of the respective end plug assemblies (30) and by heating of the mold (26), the ends (14) of the elastomeric preform (10) are molded to the profile, as well as bonded to the reinforcing wire mesh sleeves (16). Vacuum is applied to the interior of the mold to draw outgassing vapors through relief spaces therethrough. The completed elastomeric member (60) is removed from the mold cylinder (26) by stretching, the consequent reduction in diameter enabling ready separation from the mold cylinder (26) and removal thereof.

Abstract: An improved expanding shoe drum brake (10) is provided. The brake includes a pair of brake shoes (20) pivotably retained on an anchor structure (18). The shoes include brake tables (22) and webs (26), the webs are resiliently urged by a spring (132) into constant sliding engagement with three guide surfaces (78, 88 and 114) to locate the webs on a plane (P) relative to the spider and to retain a substantially parallel relationship between the shoe friction material (24) and the brake drum (12) thereby minimizing the required running clearance (44) or slack of the brake.

Abstract: Disclosed is an automatic control system for a powershift, preselect transmission (10) including a plurality of power paths (36, 38) alternately connectable between input (12) and output (20) shafts by first engaging selected ones of synchronizer clutches (42, 74, 84) associated with each of a plurality speed ratio gears (44, 46, 76, 78, 80) in each path and then alternately engaging a powershift clutch (48, 82) associated with each path. The control system includes a hydraulic logic system (118) which may be electronic and a hydraulic and shift valve system which may be electrically controlled should the logic be electronic. The control system preselects ratio gears in a nondriving path and then alternately engages the powershift clutches to switch driving connections from one path to the other. The logic system includes an improved reverse sequence valve (132) and improved shift valves (124, 126, 128).

Abstract: A tire valve assembly (10) which includes a valve stem (11), a combined actuating pin and valve element (14), a spring (18) and a retainer (16). A valve seat (19) is formed as part of the stem, and the combined pin and valve element is made of a material which is sufficiently rigid to function as an actuating element yet is sufficiently resilient to serve as an effective seal.

Abstract: A terminal seal for an environmentally sealed electric switch is reduced in cost while maintaining an effective seal by eliminating the O-ring and instead angularly reshaping the lower annular surface (20d) of the stationary contact head (20c) and the lower annular surface (28d) of the contact support rivet (28) to coact with the reversed radii (R1, R2) surface of the terminal hole (14, 18) in the molded nylon base (2). Such coaction, when the stationary contact (20) or the contact support rivet (28) is clamped in place and riveted to the external terminal (24, 32), causes cold flow of the radius (R1) along the reshaped angular surface (20d, 28d) to provide an effective seal without the need of an O-ring or other packing material or cement.

Abstract: Disclosed is a throttle modulation mechanism (10) disposed between a throttle pedal (36) and a fuel control device (12) for an unshown engine. Mechanism is operable during shifting modes of an unshown transmission driven by the engine to dip and boost fuel delivery to the engine for synchronizing the transmission and/or reducing shifting shocks. Mechanism (10), which is controlled by a transmission logic (14), includes first and second levers (16, 20) interconnected for slaved movement by a torsion spring (22) and a fluid actuated cylinder (30) having pistons (48, 52) respectively operative to dip and boost the throttle in response to logic signals applied to solenoid valves (58, 66). A spring (38) connects to and biases lever 16 toward an idle throttle position for allowing movement of lever (20) relative to lever (16) by actuator (30) during shifting modes of the transmission without changing the force applied to throttle pedal (36) by spring (38).

Abstract: Disposed is a throttle modulation mechanism (10) disposed between a throttle pedal (28) and a fuel control device (12) for an unshown engine. Mechanism (10) is operable during shifting modes of an unshown transmission driven by the engine to dip and boost fuel delivery to the engine for synchronizing the transmission and/or reducing shifting shocks. Mechanism (10), which is controlled by a transmission logic (14), includes first and second levers (16, 20) interconnected for slaved movement by a torsion spring and fluid actuated cylinders (38, 40) which respectively dip and boost the throttle in response to logic signals applied to solenoid valves (50, 64).

Abstract: A viscous coupling adapted to be positioned within the housing of a torque converter automatic transmission for use as a bypass of the torque converter and including an annular clutch lining secured to a side face of the outer peripheral portion of the coupling and a control valve assembly positioned in the outer peripheral portion to cushion the impact of engagement of the annular clutch lining with the confronting surface of the torque converter housing. The control valve assembly includes a rolling diaphragm which extends across the open end of an axially extending bore in the outer peripheral portion and is arranged to rollingly traverse the bore to successively cover or uncover a series of axially spaced leakage holes communicating with the main chamber of the torque converter and the bore.

Abstract: An improved expanding shoe drum brake (10) is provided. The brake includes a shaft-like mounting structure (42) for retaining the hook ends (40) of a heavy duty brake return spring (28). The retaining assembly includes a fixed portion (44) and an axially movable portion (46). The axially movable portion is normally abutting with the fixed portion but may be selectively axially moved away therefrom for assembly and disassembly of return spring (28) from the brake assembly (10).

Abstract: A panelboard (2) is divided into segments for three-pole industrial frame circuit breakers (30,46). Bus bars (A,B,C) in each segment have two sets of mountng holes (18,20,22; 20,24,26,28) for replaceably receiving branch circuit connectors (34,36,38; 42,44; 58,60) for either industrial or residential frame circuit breakers, thereby enabling residential frame circuit breakers (52,54) to be installed at any segment. A dead front cover (68) having a single opening (72) encompassing all segments, and kits comprising branch circuit connectors, insulating barriers (62) and filler plates (76,78,80,84,86,88) provide complete flexibility to the circuit breaker arrangement. An auxiliary main circuit breaker (96) kit enables the panelboard to be readily converted from a lug main to a breaker main panelboard.

Abstract: An insulating contact holder (26) is reciprocally movable in sliding engagement between flexible stationary contacts (22, 24) to interrupt the circuit therebetween in one position of the holder and to carry a contact (32) into bridging engagement with said stationary contacts in another position of the holder. A wedge formation (40) on the holder separates the stationary contacts a predetermined distance in the circuit interrupting position, and movement therefrom to the bridging position causes said stationary contacts (22, 24) to converge immediately prior to engagement by the bridging contact (32), thereby to relieve the bias in the stationary contacts prior to said bridging engagement to reduce contact bounce. The wedge surfaces (42) are provided with a matte surface for cleaning the stationary contacts.