Abstract: A label inspection system automatically inspects print on labels carried seriatim on a web. The system comprises a photoelectric sensing system including a light inspection sensor sensing reflected light and an electrical control circuit providing an output at a select first or second electrical state dependent upon sensed reflected light being above or below a select level. The sensor is mounted at a select transverse position in a path of movement of the web to sense reflected light along a select longitudinal path of the web, the select longitudinal path including a portion of the labels carried on the web intended to have print, the print acting to minimize reflected light. A detect sensor sense proximity of the inspection sensor relative to a select longitudinal portion of each successive label and provide an enable signal relative thereto.

Abstract: A blade assembly for attachment to a shaft that is rotatable about an axis on a conduit cleaner. The blade assembly has a hub defining an axis to be coaxial with the rotational axis of a shaft to which the blade is mounted. A cutting blade is attached to the hub so that the cutting blade does not project through the hub axis.

Abstract: Poor heat exchange in a heat exchanger between a flue gas passing through the heat exchanger and air being forced through the heat exchanger can be improved in a heat exchanger and combustor (30) for exchanging heat between a forced air stream and a flue gas generated by a plurality of spaced, parallel burners (44) with a construction including spaced, upper and lower headers (32, 34), a plurality of tubes (50), one for each burner (44) extending in parallel between and mounted to the headers (32, 34). Each tube 50 has a first section (56) of enlarged cross section adapted to serve as a combustor for fuel to generate the flue gas and a narrowed, second section (70) for exchanging heat between the flue gas and the forced air stream. Each second section includes generally flat, parallel spaced walls (58, 60) with each of the walls (58, 60) having dimples (74) therein which are directed toward the other of the walls (58, 60) into substantially contacting or almost contacting relationship therewith.

Abstract: A power unit for a conduit cleaner. The conduit cleaner has a motor with a housing carrying a shaft that is rotatable about an axis. The motor operates in response to the introduction of a pressurized fluid. The housing has inlets for admitting pressurized fluid and an outlet to permit the discharge thereof. A nozzle is connected to the housing and is configured to direct fluid from a pressurized supply to the housing inlet and direct fluid discharged from the outlet out of the power unit. The nozzle has a substantially cylindrical outer surface. In one form, the nozzle does not project beyond the cylindrical outer surface. Accordingly, a compact unit can be made according to the present invention. The absence of radially projecting structure also avoids protrusions that may intercept roots or other foreign matter within a conduit and thereby interrupt free movement of the conduit cleaner through a conduit.

Abstract: A general purpose interface is provided for connecting a floppy disk drive to a parallel port of a personal computer. The interface comprises an interface circuit and software driver circuit operated by the CPU. The interface circuit emulates the internal bus circuit in the CPU and can be used with virtually any disk controller. The interface circuit uses gate arrays as state machine logic elements to perform various functions, eliminating requirements for a microprocessor and plural memory chips.

Abstract: A headwear piece having a crown defining an opening for reception of the head of a wearer, structure for varying the effective diameter of the crown opening to accommodate different size wearer heads, and an actuator for operating the crown opening varying structure. The actuator includes a switch which, in one form, is a dial that is rotatable about an axis to operate the crown opening varying structure to thereby effect the variation in the effective diameter of the opening in the crown. In another form, the switch is translatable to effect a variation in the diameter of the crown opening.

Abstract: Undesirable high temperature gradients associated with inadequate mixing of dilution air with gases of combustion in turbines is avoided in a structure wherein dilution air is injected with a high degree of circumferential swirl through an opening (50) to the interior of an annular combustor (20) at the outlet (36) thereof which is connected to a turbine nozzle (46). The high circumferential swirl generates high "g" forces causing rapid penetration of the dilution air in the radial direction through the combustion air stream and the length of the path of the combined stream, and thus residence time and thoroughness of mixing, can be controlled through the use of a baffle (60) overlying the opening (50) to direct the dilution air countercurrently to the gases of combustion prior to introduction into the stream thereof.

Abstract: A composite drill pipe has a fiber reinforced synthetic tube with a leading end and a trailing end spaced axially from the leading end, with the leading end of the tube being engageable with a bit for drilling a bore through the earth when a force is applied to the trailing end of the tube. Hardened steel fittings are attached to the opposite tube ends and have interengageable threaded portions for joining a plurality of serially arranged drill pipes and forming a flexible drilling string of desired length. Radial holes are drilled around the circumference of the tube ends and into the steel fittings, and stainless steel dowel pins are press fit into the holes to provide a mechanical lock between the composite tube and the fittings. A steel sleeve is placed over the is bonded to the outer surface of the tube.

Abstract: An ice making apparatus includes a mold in which water is frozen to form an ice body. Also included are an electric motor and an ejector blade for ejecting the ice body from the mold. An electric heater in heat transfer association with the mold is operable to free the ice bodies from the mold prior to the ejector blade ejecting the ice bodies. A control circuit includes a thermostat responsive to temperature of water in the mold. A thermostat switch is controlled by the thermostat to initiate operation of the motor for ejecting the ice body upon complete freezing thereof and concurrently energizing the heater. Art electric circuit includes the thermostat switch, the motor and a second switch controlled by the operation of the motor for maintaining energization of the motor independently of the first switch and causing the thermostat switch to control further energization of the heater whereby the thermostat switch de-energizes the heater within a single revolution of the ejector blade.

Abstract: The combination of a fluid operated cleaner, to be directed into a conduit to remove obstructions in a passageway defined by the conduit, and a manipulator. The conduit cleaner has a frame which has a connector for a fluid supply conduit. The manipulator is connected to the conduit so that the manipulator and fluid supply conduit can be used together to reposition the conduit cleaner at a location remote therefrom. Between the manipulator and the fluid supply line, the user is given substantial flexibility in reorienting the conduit cleaner to allow it to be introduced to the entryway of a remotely located conduit.

Abstract: In order to achieve relative simplicity in a reliable measurement technique, an apparatus and method for measuring wet film thickness on a surface is disclosed. The apparatus includes a fixture adapted to be positioned in close proximity to the surface, a gauge supported by the fixture for movement toward and away from the surface, and a spacer for spacing the fixture at a selected distance from the surface. The gauge is moveable from a first position out of contact with the wet film to a second position in contact with the surface to create a measurable spot of the wet film on the gauge. The method includes providing a gauge supported for movement toward and away from the surface, moving the gauge into contact with the surface to create a measurable wet film spot, and moving the gauge out of contact with the wet film to measure the spot.

Abstract: The use of relatively heavy, large profile headers in a heat exchanger are avoided through a header construction wherein headers (20, 22) are formed of header plates (34) tapped with tank plates (36) having a concave surface (38) facing the header plate (34). The header plates (34) include a plurality of flanges (82) directed away from the tank plates (36) surrounding elongated slots (48). Each of the flanges (82) includes a pilot surface (80) extending about the associated slot (48) for receiving the end (90) of a flattened tube (20). The construction prevents the ends (90) of the tubes (28) from entering the header chambers (42) to a location whereat they could disrupt the flow of a heat exchange fluid therein to prevent uniform distribution of the same throughout the associated header (20, 22).