2012
Machinery & Equipment

The need to clean up space debris is urgent. We propose a comprehensive, self-sufficient and robotically enabled system, avoiding multiple launch support platforms once deployed. The main outlines comprise an initial vehicle together with a related debris processing plant. A space based debris mitigation asset of this type would also provide clear expectation and outflows for the parallel development of satellite servicing, in space vehicular interventions and space based refueling capacity. Such considerations would include for self-sufficient, renewable and independent space based vehicular power sources.

Debris mitigation might be assumed as a vehicular based intervention, collection and processing activity, while bigger volumes, such as spent satellites or spacecraft, would be collected utilizing a basket-shaped collecting and retrieving ...

Start up of energy equipment is guided by some restrictions of acceptable temperature changes with the aim to avoid higher stress conditions in construction materials.

These restrictions lie in a range of several [K/minute] to avoid higher stresses in construction during start up processes.

If these loadings, temperature changes in working fluid or steam in steam boilers and turbines, are greater than the recommended values, we can expect to get higher stress conditions in construction materials which can override the acceptable values.

In cases with higher temperature changes during time, normal stress conditions can be overrided and creep conditions can be expected, as shown in fig. 1.

Analyzing the probability to override the mentioned recommendations, we need ...

(Study to Improve the Target Rock Relief Valve Using CFD-ANSYS Software Package)

Introduction:

Nuclear power plant emergency cooling systems serve the essential purpose of providing cooling for the reactor core in the event of failure of normal cooling systems. The most severe form of failure is a loss of coolant accident in which a pipe rupture causes a breech of the primary containment system. In this case, the function of emergency cooling systems is to provide as high a flow rate and volume of water as possible to the core to prevent fuel element damage. A common source of water for emergency cooling is on-site fresh water storage tanks. The large flow rate of water from the storage tanks ...

This is my support system for retractable flat screen monitor room tables. Remember how disturbing the monitor on the table was during the meeting? My system includes a tubular support element (a rectangular development) which, on the one hand, has a plate for the attachment of a flat panel monitor and, on the other hand, allows the fixing of the cover (of material equal to that of the meeting table). This tubular element (a rectangular development) has the pins to rotate which engage in the slots formed on the sides of the lower protection. Two belt transmissions connect the electric motors (controlled by a frequency converter) to the pins of the rotating element. The electric motors, through belt drives, ...

The FreeD is a hand-held, digitally controlled, milling device that is guided and monitored by a computer while still preserving the craftsperson's freedom to sculpt and carve. The computer will intervene only when the milling bit approaches the planned model. Its interaction is either by slowing down the spindle speed or by drawing back the shaft; the rest of the time it allows complete freedom, letting the user to manipulate and shape the work in any creative way.

The idea of the FreeD is to allow designers to engage with the physical material and not just with the CAD environment, and to let them do their interpretations to the virtual model. By that, designers can create something that is ...

The thermal stir welding process (U.S. Patents 7,980,449 & 8,127,977) is a new solid-state (meaning the weld metal does not melt during welding) welding process invented at NASA's Marshall Space Flight Center. The unique welding process (FIGURE 1) decouples the heating, stirring and forging elements of friction stir welding and allows for the independent control of each element of the weld process. An induction coil first heats the weld joint material to a desired plasticized temperature, at which time, the weld joint material moves into a through-thickness stir rod that stirs the already plastic material. The stir rod can be independently controlled to rotate at a desired rotational speed, or RPM. Upper and lower non-rotating containment plates, also independently ...

A major drawback with available thumbscrew type products is that sometimes not enough torque can be applied without a separate tool to clamp parts or engage a lock feature which is usually a requirement. The integral wrench greatly increases the torque applied to the screw. All versions include an integral wrench locking feature.

The prototype screws depicted on this page and in the video at http://youtu.be/ziTDz_E-vvA are based upon a popular size thumbscrew with a 3/8 threaded shank, 7/8 diameter x 11/16 high head. This screw is commonly used to fasten drawers, containing electronic components etc, to their cabinets for industrial and military applications.

Version #1 depicts the basic screw with a slotted head to stow the integral folded ...

This simple equipment is designed to improve efficiency and cost effectiveness level regarding time and material spent in tire manufacturing processes.

In current textile plies knitwork stage as initial process to make casing plies, there is a lot of longitude tire cords where each of them have diameters 5 times larger than the latitude with approximately 10 meters length.

Those wasted longitude tire cords could be reprocessed by tire cord splitting machine in several steps to produce a number of latitude tire cords were ready to knitted, such as counter spinning, cleavage stage (using high precision cutting tools), etc.

By this equipment, the tire manufacturer is able to reduce procurement cost significantly or produce many more textile plies with ...

Universal spanner-screwdriver consists of
1) Frame (grey in picture).
2) 5 slotted (2 mm,3 mm,4 mm,5 mm,6 mm) screwdrivers.
3) 5 crossed (2 mm,3 mm,4 mm,5 mm,6 mm) screwdrivers.
4) Spanner (blue) (10 mm,12 mm,14 mm,19 mm,24 mm).
5) Spanner (red) (8 mm,11 mm,13 mm,17 mm,22 mm).
All tools can be fixed at angular positions (0,90,180).
Maximum measurements in millimeters : 167.71 x 34.76 x ...

Analog to Digital Converters, ADC, provide digital representations of analog voltages/power for digital signal processing and control circuitry.

As sampling rates increase, problems of temperature drift, noise, aperture uncertainty and many more factors are exacerbated. Around 1978 a very bright Engineering Technician ( Bob ), conceived a design using flash ADCs and Digital to Analog Converters, DAC, comparators and summing circuits, to sample analog signals. This evolved into the early Delta Sigma ADC. It was a lot different from today's versions.

For each ADC bit, we can derive 3 dB better resolution in the analysis of the actual sampled voltage. Conventional ADC designs required doubling most of the circuitry for each extra bit of dynamic range. Currently ADCs can ...

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