Abstract: A combined portable case and luggage trolley which, in its preferred form, includes a rigid frame which, when folded, engages a face of the case to become an integral part thereof and which is extendable therefrom to form a luggage support in cooperation with a spaced pair of frame support arms pivotally connected to the case. When extended, the rigid frame is alignable with the support arms in a common plane to define a luggage receiving framework in cooperation with the case. Wheels are mounted within recesses in the case for selective extension in association with extension of the framework.

Abstract: A method of making and the resulting heat exchanger in which there is provided a header plate having a tube receiving opening closely embracing the tube in the opening with a sheet of solder on at least one of the tube and plate adjacent to the opening together with a retainer wettable by the molten solder attached to the tube and plate and bearing against the solder to retain it in position. The assembly of tube, plate, retainer and solder is heated to a melting temperature for the solder with the result that the molten solder flows over the wettable retainer and into the space between the plate and tube by capillary attraction after which the solder is cooled to a solidifying temperature to form a solder joint uniting the tube and header.

Abstract: A sign construction having a plurality of movably connected panels including a mounting panel and panels successively hung from the lower edge of the mounting panel. In the illustrated embodiment, the sign construction includes an upper mounting panel having structure for securing the mounting panel facially to a windowpane. The panel portions hanging from the mounting panel define selective information-conveying sign structure and, in the illustrated embodiment, include an upper panel portion and a lower panel portion which are hingedly connected to permit the lower panel portion to selectively hang downwardly from the upper panel portion or be retained between the front face of the upper panel portion and the windowpane as a result of hinged swinging of the lower panel portion upwardly from the hanging disposition. The connection of the upper edge of the upper panel portion to the lower edge of the mounting panel, in the illustrated embodiment, is provided by a hinge.

Abstract: A frame for a self-service sales display device is provided with pockets on each side of the frame. Guide members are provided on the entry side or wall of the frame and on the side or wall of the frame opposite the entry side for guiding the flat members into and out of the pockets in the frame. A cutout is provided through the entry wall into each pocket for ease in gripping the edge of a poster or flat member for removal from the frame. The frames have shaped pivots which extend into openings formed in surfaces of the display device such that the frame can be pivoted into a picture book position on the device.

Abstract: Cooling means for cooling a control such as for use in controlling the operation of electric vehicles or the like. The control utilizes a direct current battery power supply and includes an inverter for delivering alternating current to an alternating current motor of an air moving structure, such as a fan, provided for cooling the control during the operation thereof. The circuit is arranged to cause the fan to have variable power as a direct function of the load demand of the control circuit so that maximum cooling occurs when the load demand in the control is maximum and minimum cooling occurs when the load demand is minimum. The circuit is arranged to maintain an effectively constant volt-second duty cycle characteristic at the control power supply to the air moving structure whereby the variation in power developed by the motor thereof is a function of the duty cycle characteristics of the control power supply as applied to the motor.

Abstract: A display and burial system including a display base having an appearance similar to a casket base and having a supporting shelf along the upper perimeter thereof, a reusable casket-like movable lid unit removably supported by the supporting shelf to enable viewing of a body, and a cover unit positionable on said supporting shelf in place of the lid unit after viewing whereby the display base and cover unit provide a burial vault.

Abstract: A point of purchase advertising display device has a front element and a rear element which are spaced a short distance apart and back illuminated. Primary copy is transparent or translucent on the front element and is repeated on the rear element in translucent form in register with that on the front element. A front fine pattern of transparent and opaque areas occupies the rest of the front element and defines the margins of each character in the primary copy. Translucent secondary copy on the rear element is viewed through parts of the front pattern, and the rest of the rear element consists of a rear fine pattern of translucent and opaque areas which is dissimilar from the front pattern but cooperates with the front pattern to produce a field of changing visual effects as a person moves relative to the display device. The rear fine pattern defines the margins of each character in the copy on the rear element.

Abstract: A governor and decelerator control linkage has two shafts (16 and 17) journalled in a housing (10) and a one-way coupling (18) permits rotation of the second shaft (17) either independently of the first shaft (16) or as a result of rotation of the first shaft (16). A lever (19) fixed to the second shaft (17) may be moved between first and second limit positions by moving a lever (24) on the first shaft (16) or may be moved between the first limit position and an intermediate position by moving a third lever (28-29) which is mounted on a third shaft (27).

Abstract: An indicator circuit for indicating to the operator of an electrically propelled vehicle the remaining capacity of the vehicle battery. The state of charge information is indicated in digital form for facilitated readout. The circuit is arranged to prevent an increase in the indicated state of charge during use of the battery as a power source, i.e. in a motoring mode. The circuit is arranged to prevent a decrease in the indication of the state of charge during a recharging of the battery. The circuit utilizes a feedback signal from the digital counter portion thereof for comparison with a second signal produced in the control circuit to provide either a count-up signal to the digital counter or a count-down signal to the digital counter in providing the control of the operator indicator. The feedback signal may be converted to an analogue signal for comparison with the produced circuit signal in a comparator to provide the appropriate count-up or count-down signal.

Abstract: A combined lift and metering pump includes a set of relatively rotating pump elements in the form of an outer gear and a eccentrically disposed inner gear fixed on a drive shaft. A regulator communicates through a control passage with a discharge chamber of the pump to regulate fuel pressure in the discharge chamber and a metering orifice formed through the outer gear provides for intermittent communication with a timing port once with each revolution of the outer gear for discharging a metered amount of fuel from the discharge chamber.

Abstract: A thermal element having a tubular casing with an open end, a volume of heat-responsive, expandable wax positioned in said casing at a distance from the open end thereof, a spherical resilient seal member compressively positioned in the casing adjacent said wax, a motion-transmitting pin extended between the seal member and the open end of the casing and having a relatively soft washer affixed thereto for engagement against the seal member and with at least one peripheral notch in the washer permitting flow of liquid thereacross.

Abstract: A liquid level control wherein a receptacle for collecting liquid is carried on a support for movement in accordance with the weight of the liquid collected therein. A switch is mounted adjacent the receptacle so as to be actuated as an incident of movement of the receptacle. A control is provided which is adjustably retained on the support adjacent the receptacle to provide a selectively adjustable resistance to movement of the receptacle whereby the weight of the collected liquid necessary to actuate the switch may be selectively adjusted. The control is arranged to be fail-safe in that should the control loosen, actuation of the switch is effected by a minimum weight of collected liquid in the receptacle.

Abstract: An integrated drive-generator system having a drive input shaft with a mechanical differential positioned in coaxial relation with the drive input shaft, a generator positioned alongside said differential and drive input shaft, and a hydrostatic transmission having a pair of coaxial hydraulically interconnected units positioned alongside said differential and drive input shaft and circumferentially spaced from said generator. A pair of drive connections to said differential are at one end of said hydrostatic transmission and the generator is drivingly connected to another element of the differential and with all of the interconnecting drive elements being located in a generally planar relation at the top of a housing for the system.

Abstract: A generator having a stator and a rotor mounted for rotation relative to the stator, a generally cylindrical support structure for the stator either in the form of a housing or a support ring within the housing, said stator and support structure being formed of materials having substantially different thermal expansion rates and the stator having an outer surface engaging an inner surface of the support structure with an interference fit throughout the operating temperature range of the generator, and a plurality of longitudinal grooves formed in one of the surfaces to permit bending of said support structure in the area of said grooves when the generator is operating in the lower part of said temperature range.

Abstract: An electronic organ tone generating technique produces a harmonic equivalent of a sawtooth wave. In one embodiment square waves generated by a conventional tone generator are applied to a one shot multivibrator, the output of which is a series of narrow rectangular pulses having a flat harmonic spectrum with both even and odd harmonics present. The narrow rectangular pulses are applied to a 3db per octave filter to produce a waveform, the harmonic content of which is equivalent to that of a sawtooth wave. In this embodiment, the pulse width remains constant regardless of the frequency of the pulse train. In a second embodiment, the duty cycle at each octave when moving up the keyboard is doubled to compensate for amplitude falloff which may occur in the filtered signal.

Abstract: A display stand for displaying flat articles on edge, such as greeting cards and the like, has a base and a vertical column to which is assembled one or more tiers of upwardly angled housings having card-receiving pockets. Each tier has multiples of two housings located diametrically opposite each other on a mounting web, such that when four, six or eight housings are provided, the housings are equally spaced apart circumferentially by abutments on said webs. Each web has a column-engaging hub of reduced axial length which interfits with an axially displaced hub on an adjacent web to present a continuous axial hub to the column throughout the axial height of said tier. Tabs project upward and downward from each housing to interfit with tabs on housings on a tier above and/or below said housing. Each housing has a divider to make two pockets therein with openings in the lower corner of each pocket to permit dust and the like to fall out.

Abstract: A portable observation stand having a ladder formed of upper and lower ladder sections pivotally interconnected at adjacent ends for movement between a folded position and an extended position in end-to-end relation, a seat and a foot-support member are both pivotally connected to the upper ladder section with the seat arranged to be in operative position above and rearwardly of the foot-support member. The seat is disposed rearwardly of the rails of the upper ladder section and the foot-support member has a pivotable part thereof movable to an overlapped position with the remainder thereof whereby a person can climb the ladder to the seat level without obstruction thereby. Linkage structure interconnects the seat and foot-support member for simultaneous movement thereof between an operative position extending at a substantial angle to the upper ladder section and a storage position substantially parallel with the upper ladder section to facilitate folding of the stand.

Abstract: A multi-mode hydromechanical transmission shift system having a hydrostatic unit with at least one variable and reversible displacement component with a displacement control, a plurality of clutches independently operable for setting the mode of operation of the transmission and a control circuit including a plurality of valves for setting the mode of operation and responsive to the position of the displacement control for causing a shift in operation from one clutch to the other to change the mode of operation.

Abstract: A cart caster having an improved self-centering structure for causing the caster wheel to have a preselected alignment when elevated from a subjacent support surface. The self-aligning structure includes a cam, a cam follower, and a biasing element cooperatively causing the caster wheel to move to a preselected position about the caster axis when load is removed from the wheel as by lifting of the cart. The aligning structure may include a plurality of alignment portions permitting the wheel to be automatically brought to any one of a plurality of different positions about the caster axis, such as to either a fore or aft direction relative to the cart.

Abstract: A rotary valve having a valve body with a rotatable valve member in the form of a port plate rotatably positioned therein for causing free flow from pump to reservoir in a neutral position and having other operative positions for directing fluid to and from the valve. Passage means in the valve body have check valves providing free flow from a control port to an operative member, such as a cylinder, and for holding of pressure on the cylinder when the valve is returned to neutral position. The valve includes seat seal members positioned within flow passages in the valve body and engageable with the valve member and which are formed with opposed surfaces having a differential area whereby forces resulting from fluid pressure urge the seat seal members against the valve member.