The Learning-Media Transaction
The manner in which the learning-media transaction materializes depends largely upon what is understood and believed about instructional technology.  According to the Commission on Instructional Technology this involves consideration of at least two major viewpoints or definitions.  The Commission (Tickton, 1970, p.21) reports that:

In its more familiar sense, it means the media born of the communications revolution which  can be used for instructional purposes alongside the teacher, textbook, and blackboard. ... In order to reflect present-day reality, the Commission has had to look at the pieces that make up instructional technology: television, films, overhead projectors,  computers, and other items of "hardware" and "software" (to use the convenient jargon that distinguishes machines ...

A weather strip having a high sealing capability and an aesthetic appearance when attached to a vehicle body. The weather strip includes an extruded portion and a molded portion connected to the extruded portion and having a trim and a hollow seal.
The trim includes a first wall from which the hollow seal extends. The first wall has a slot provided with a rounded corner. A second wall extends from the first wall in a direction opposite the hollow seal. A third wall extends from the second wall in a manner opposing the first wall. The third wall includes a cutaway portion defined at a position facing the slot of the first wall. The cutaway portion includes a rounded corner. A core used to mold the hollow seal of the molded portion is removed from the molded portion through the slot and the cutaway portion.
A weather strip used for a vehicle includes a generally U-shaped trim and a ...

Joint element for a pneumatic structural element according to the prior art, comprising a sleeve, a compression member, two tension members and two spherical caps. In each case one joint element is fitted for the spherical caps such that an opening accommodates the spherical cap.
The joint elements serve for introducing tensile and compressive forces, in a manner free of bending moments, into the pneumatic structural element, the compressive forces being absorbed by the compression member and the tensile forces being absorbed by the tension members. The joint element has holes for fastening the compression member with a screw, on the one hand, and holes for accommodating the tension members, on the other hand.
The symmetrical arrangement of the holes ensures that the vectors of bearing forces and of the tensile and compressive forces in the joint element added together give zero and, ...

A solenoid valve includes a housing that establishes a supply port, a control port, and an exhaust port. A fluted bushing is statically affixed within the housing and a poppet slides within the bushing.
The poppet is movable between a de-energized configuration wherein flow is prohibited between the control port and the exhaust port, and permitted between the control port and the supply port, plural partially energized configurations wherein flow is permitted between the supply port and the control port, between the control port and the exhaust port, and between the exhaust port and the supply port, and a fully energized configuration wherein flow is prohibited between the control port and the supply port and flow is permitted between the control port and the exhaust port.
A typical automobile includes numerous systems that use one or more solenoid valves to control the flow of fluid ...

In an eccentric radial piston pump, a rib 12 protruded in a radial direction is formed on an inner peripheral surface of an end portion on a discharge side of an eccentric cam ring 3 over a prescribed range. In an eccentric radial piston motor, a rib 12 protruded in a radial direction is formed on an inner peripheral surface of an end portion on a high pressure side of an eccentric cam ring 3 over a prescribed range.
By the rib 12 formed in the radial direction, a rigidity of the eccentric cam ring 3 can be improved, and the eccentric cam ring can be prevented from being deformed by a thrust from the piston. Thus, the rigidity of the eccentric cam ring can be increased without increasing the thickness of the eccentric cam ring, and further the eccentric radial piston pump and the eccentric radial piston motor in which outside dimensions in the radial direction are reduced can be ...

The axial mechanical seal of the present invention comprises a housing with an enclosed annular space containing fluid under pressure; a seal ring and a carrier supporting the seal ring are axially and radially displaceable in the annular space when subjected to heavy vibrations; a series of pockets are annularly disposed in the housing and each includes a compensating element having a portion in contact with the fluid under pressure that yields to accept the fluid displacement resulting from the axial movement of the seal ring and its carrier inside the annular space.
In an axial mechanical seal including a housing with an annular inner spacecontaining fluid under pressure, a seal ring and a carrier means supporting said seal ring in said annular space, said seal ring and said carrier means being axially and radially displaceable in said annular space when subjected to heavy ...

In a continuous bag-making process, the film and zipper track moves intermittently through a bag machine in a continuous stream, so there is no end to the zipper track on which the slider can be inserted. In the present invention, in the intermittent motion-part of the bag machine, the zipper is cut apart at the location that is to be the edge of the bag, the ends formed by the cutter moved laterally relative to each other exposing the ends and the slider is inserted over one of the exposed ends.
Inserting a slider over one of the exposed ends prior to severing the bag material from the remaining continuous web, and thereafter continuing the movement of the zipper and web of bag material for a distance corresponding to a predetermined width of the zippered plastic bag to advance a new section of the zipper to the zipper severing station.
In a continuous process for making zippered ...

System and process for metal stamping parts having tolerances below 1000 nanometers. The inventive system and process is particularly suited for producing optoelectronic parts. The system includes a metal stamping press and one or a progression of metal stamping stations for supporting a punch and die.
The metal stamping stations are designed to maintain substantial alignment of the punch and die with minimal moving components. The metal stamping station includes a shaft for rigidly guiding the punch to the die. The metal stamping press is capable of providing the punch with the necessary force to perform the metal stamping operations. The system includes an interface system for interfacing the force of the press with the punch, while simultaneously structurally decoupling the press from the punch. The system also includes a locating sub-plate, for locating the metal stamping station ...

A seat which has a pneumatic component. The pneumatic component is pressurized to a desired degree to conform the curvature and hardness of the surface of the seat to the preference of the seat occupant. The pressurization is carried out by manipulating a control mechanism which allows air into and release air from the pneumatic component.
Conventionally, seats for a vehicle have a seat portion and a seat back portion which have a surface configuration and hardness suitable for supporting a body of a seat occupant comfortably. However, such surface configuration and hardness arestandarized, thus failing to meet varying demands by all possible seat occupants having different body configurations.
Moreover, in view of personal preference and for the purpose of helping to eliminate fatigue it may sometimes be desirable to applypressure to the lumbar portion of the occupant, causing that ...

In a proportional solenoid valve, a solenoid main body includes a coil, a valve seat member having a seat portion, a valve element that is displaced in accordance with a current applied to the coil so as to be brought into and out of contact with the seat portion, and a valve guide portion that is arranged coaxially with the seat portion and guides the displacement of the valve element.
The housing is attached to the solenoid main body so that a space is formed between the housing and the valve seat member. A seal member made of an elastic material is provided in the space between the housing and the valve seat member.
In a conventional proportional solenoid valve, a valve element is displaced while being guided by a valve guide portion that is provided for a solenoid main body. Also, a valve seat member having a seat portion, which the valve element is brought into and out of contact ...

Controlling the slewing transmission rate of a driver circuit. According to one embodiment of the present invention an output buffer includes a driver circuit having an impedance and a pre-driver circuit to control a slewing transmission rate of the driver circuit based on the impedance of the driver circuit.
Computer systems include a processor, one or more memory devices, and one or more input-output or I/O devices. The processor, the memory devices, and the I/O devices communicate with each other through a bus in the computer system. A bus is a communication link comprising a set of wires or lines connected between the devices listed above. The bus is shared by the devices as they communicate with one another. A bus may also be a set of lines connected between two functional circuits inside an integrated circuit. The bus generally contains a set of control lines and a set of data ...

Labyrinth cartridge seal having a shell and a plurality of sleeves having corresponding portions to prevent axial and radial movement therebetween and particularly a labyrinth cartridge seal for use in a compressor for compression of a gas, such as oxygen, which restricts leakage of pressurized gas to a drive mechanism such as an oil lubricated gear box, to thereby reduce the likelihood of explosions.
In one embodiment, the labyrinth cartridge seal includes a shell comprising a passageway therethrough, and four spaced-apart, concentrically aligned sleeves, axially and radially supportable along the passageway and generally sealable with the shell to define three separate chambers around the shaft. The shell has three ports, each one opening onto a different one of the three separate chambers for venting or receiving a supply of buffering gas. Also disclosed is a compressor ...

Three tape type zipper is disclosed which comprises first to third tapes, a first slider for fastening the first and second tapes and a second slider for fastening the first and third tapes. One end of the first tape and one end of the second tape are connected to each other and one end of the third tape and the other end of the first tape are connected to each other so that the first tape serves as a common counterpart to the second and third tapes. The other ends of the second and third tapes are kept free.
The first and second tapes are fastened together by moving the first slider toward the second slider, whereas the first and third tapes are fastened together by moving the second slider toward the first slider.A bag-shaped article with the three-tape type zipper secured thereto is also disclosed which comprises a body with an opening formed thereon through which things are ...

CLAIM The ornamental design for a combined interior of a shower drain pump housing with interior compartments, and a cover for an interior compartment of a shower drain pump housing, as shown and described.
A foreign matter trap for use in a drain such as a shower or sink drain in which water flows downwardly through a drain pipe, the trap having an element for removably positioning in the drain pipe including a downwardly extending longitudinal member, a plurality of layers of foreign matter catching members extending generally radially from the longitudinal member, each layer being formed of a plurality of spaced apart spicule members, the spicule members of each layer covering less than a complete cross-sectional circumferential area leaving a portion free for the flow of water therepast, the layers being arranged so that the spicule members in adjacent upper layers extend over and ...

Have driven hydraulic fittings wrench torque wrenches and hydraulic fittings hollow wrench two series. Driven hydraulic fittings torque wrench to use with standard sockets for general purpose hydraulic fittings wrench, used widely. Hollow hydraulic fittings wrench thin, especially for relatively small areas of space. Apply power nuclear power, wind power, hydropower, thermal power, ship, metallurgy, transport, cement, construction, aviation and other fields.　
Hydraulic fittings wrench classification do? See the following description. Drive hydraulic fittings wrenches, hydraulic fittings hollow wrench, hydraulic fittings torque wrenches, hydraulic fittings torque wrenches, electric hydraulic fittings wrench, pneumatic wrench, KERUIDA hydraulic fittings wrench. 　
Driven hydraulic wrench features: high-tech aerospace materials and ultra-high strength alloy steel, forming one body, to ...

A hydraulic orbital motor utilizing the holes surrounding the main assembly bolts together with interconnecting radially extending passages so as to allow for the transfer of fluid axially through the device from a single fluid input hole to an area 360° surrounding a valve.
Hydraulic orbital motors have been utilized to provide power to a negative mechanism (such as a motor for a drivewheel or winch) or to derive power from a positive mechanism (such as a fluid pump driven by a gasoline motor). In some instances, the device is also utilized for a secondary purpose such as controlling the speed of rotation of itself or an auxiliary member.
Most hydraulic orbital motor devices are relatively large in diameter for a given volumetric efficiency. The reason for this is the constraints in the cross-sections of the fluid passages which are necessary in the body of such hydraulic orbital ...

Rotary cartridge seal is provided which includes a cold flowable plastic ring having a body for sealably engaging the housing bore and a lip for sealably engaging a shaft rotating within the housing bore.
A separable metal retainer is provided for fixing the plastic ring within the housing bore and around the shaft with the separable metal retainer having a surface of revolution with a rear portion having a radius suitable for press fitting into the housing bore and a front portion of lesser diameter ending therein. An internal groove is provided into the plastic ring body for engaging the ring therein in order to latch the plastic ring and the metal retainer together with residual stress in both the axial and radial directions within the plastic ring due to groove and ring dimensions and shape.
Cartridge rotary seals have been used for many years in a variety of applications for the ...

A multi-station metal stamping conductor in a multi-outlet receptacle enables the simplified molding of the receptacle with less parts and wire connections. The conductor has articulated stations coinciding with the individual outlets, each station having a female receptacle with an appropriate pin or blade opening.
The conductors are easily held in position for molding of the receptacle. Each conductor requires only a single crimped conductor wire serving all of the stations. The molding may be done without change to prior art molds.
Multiple outlet receptacles for the plugging in of electricity for machinery in a factory for a wall outlet for the plugging in of power tools generally, have heavy duty electrical cable. Such multiple outlet receptacles generally have a flat array of polarized outlets for the male plugs in a single head, The connector plugs usually have a round or ...

Using the quick couplings is to pay attention to some problems. For example, when installing the quick couplings is necessary to pay attention to the following aspects:
In a thread with a quick couplings thread Department thickness of raw material with the appropriate winding.Tighten using the appropriate power of quick coupling, force may twist a bad connector, power connector not cause leakage and release.Will be used to insert the tube top cut flat vertical pipe cutter, pipe wall to be inserted to smooth, clean, no scratches, if any scratches, there are scratches in the pipe should be vertical cut away.
Will cut the top tube insertion quick couplings, plug in the end force.To test tube connected firmly, pull the power look with the appropriate tubes, pipes can not pull.Placed in the quick couplings chuck Department clasp, to avoid the use of the process tube was accidentally pulled ...

Control cable line common fault with mechanical damage, insulation damage, wet insulation, insulation aging and deterioration, over-voltage, cable overheating breakdowns. When the occurrence of the above fault lines, fault lines to be cut off the power to find the point of failure, inspection and analysis of the failure, then repair and test, the removed the cut off and when failure to eliminate only after restoration of power supply.
Platinum alloy as the production of spark plug center electrode material is an inevitable trend. Work environment because of the extremely bad spark plug. In combustion, the temperature will rise very moment, this control cable rapid thermal quench alternating high frequency, not the ordinary materials can respond individually. Therefore, the center of the spark plug ignition side is demanding material requirements. Furthermore, control cable platinum ...