Graphite Font Generator

[Maya Malbon]

Inthis blog I will explain several different ways to create three dimensional letters; including one point perspective. At some point in time, it seems like all pyrography artists create signs, or add sayings to their artwork. My goal with this blog is to provide ideas that might help make your signs stand out or look unique.

Before we get going, I want to mention that you may see several different pen tips being using. I have purchased some handsets that were not made by Colwood. I need to get familiar with these handset and pen tips, so I use them on demonstration projects like this one.

A very obvious option is to use a stencil. There are a lot of stencils available at craft stores, art stores, and numerous places online. There is a wide selection of font styles and sizes to choose from.

Another option is to use a word processing application. Applications of this sort tend to have a lot of fonts to choose from, and a number of them allow you to enter a custom amount for the font size.

Yes, the letters traced from the printout are not very dark. I should applied more graphite to the back of the paper. The important thing is that they are dark enough that I can see them.

Rotate the board as needed, so you are always pulling the pen tip down towards yourself. Burning in this direction makes it easier to control the results so the burn strokes are consistent.

As you burn, slightly overlap the burn strokes. This will help smooth out the results by making it harder to see individual burn strokes. Re-burning over the area will also help. Plus, that will further darker the edges.

After all of the edges of the letter are burned along, then lightly burn over the center of the letter. Use any burn stroke you want for this. I used either uniform strokes or circular motion.

This is the only style of letter in my blog that requires a different method depending on whether you are using a stencil or a printout. I will start by explaining how to do this method with a stencil, and then I will explain the printout method.

This line represents how deep or thick I want the letter to be. Is it necessary to erase the first guideline that was drawn on the board? No. I just like to reduce as much clutter as possible.

Make sure to stop drawing any line if it should come into contact with another letter. Working in this fashion will make it a lot easier to see each individual letter, and know what lines go with each letter.

This will give you a better idea of how you want your sign to look. The pencil version is easier to make change on. Plus, you can use the pencil version as a reference while burning the sign.

Basically, I made the light source the same as the perspective dot. I did this to make things easy for myself. You can make your light source come from wherever you want. That is something you would need to work out on your pencil version.

That is it for this blog. I hope I was able to provide some information that might be helpful for your project or a future project. I actually think that creating 3D letters is kind of fun; especially one point perspective.

CLA-2-90:S:N:N1:104 867359

Mr. James F. O'Hara

Stein Shostak Shostak & O'Hara

3580 Wilshire Boulevard

Los Angeles, California 90010-2597

RE: The tariff classification of the Tetley Technegas Generatorand Technegas Patient Administration Sets from Australia.

Dear Mr. O'Hara:

In your letter dated September 24, 1991 on behalf ofCheyenne Medical Equipment, Inc. of Agoura, California yourequested a tariff classification ruling. The Tetley Technegas Generator is designed to produce agamma emitting radioactive gas which is inhaled by a patient.Using the gamma energies of the radioactivity, a picture is takenof the patient's lungs to diagnose potential lung disease. Thegas is produced by placing a gamma emitting radioactive solution(Technetium-99m) into a carbon crucible. The crucible is thenplaced in the generator, and a stream of air dries the solutionas the crucible is warmed. The radioactivity is then converted toa radioactive gas by heating at a very high temperature in anatmosphere of Argon gas. The gamma emitting radioactive gas iscontained in a collection vessel from which a patient inhales thegas through a specially designed, separately imported PatientAdministration Set. The Technegas Generator will be imported withits transport cart (trolley).

The Technegas Patient Administration Sets are blister packedand consist of a filter, a tee section with one way valves, agraphite crucible, mouthpieces and a connecting hose. Due toradioactive contamination, the sets are disposed of after asingle use. The graphite crucibles from the above set may also beimported separately.

The applicable subheading for the Tetley Technegas Generatorwith transport cart will be 9022.21.0000, Harmonized TariffSchedule of the United States (HTS), which provides for apparatusbased on the use of alpha, beta or gamma radiations ...: formedical uses. The rate of duty will be 4 percent ad valorem.

The applicable subheading for the Technegas PatientAdministration Sets will be 9022.90.9000, HTS, which provides forparts and accessories for apparatus based on the use of alpha,beta or gamma radiations. The rate of duty will be 4 percent.

The graphite crucible, when separately imported, will beclassified under HTS subheading 6903.10.0000 which provides forother refractory ceramic goods (for example, retorts, crucibles...), other than those of siliceous fossil meals or made ofsimilar siliceous earths: containing by weight more than 50percent of graphite or other forms of carbon or of a mixture ofthese products. The rate of duty will be 4.9 percent.

This ruling is being issued under the provisions of Section177 of the Customs Regulations (19 C.F.R. 177).

A copy of this ruling letter should be attached to the entrydocuments filed at the time this merchandise is imported. If thedocuments have been filed without a copy, this ruling should bebrought to the attention of the Customs officer handling thetransaction.

Sincerely,

Jean F. Maguire

Area Director

New York Seaport

This page is about the main conventional types of nuclear reactor. For more advanced types, see pages on Advanced Nuclear Power Reactors, Small Nuclear Power Reactors, Fast Neutron Reactors and Generation IV Nuclear Reactors.

A nuclear reactor produces and controls the release of energy from splitting the atoms of certain elements. In a nuclear power reactor, the energy released is used as heat to make steam to generate electricity. (In a research reactor the main purpose is to utilize the actual neutrons produced in the core. In most naval reactors, steam drives a turbine directly for propulsion.)

The principles for using nuclear power to produce electricity are the same for most types of reactor. The energy released from continuous fission of the atoms of the fuel is harnessed as heat in either a gas or water, and is used to produce steam. The steam is used to drive the turbines which produce electricity (as in most fossil fuel plants).

The world's first nuclear reactors 'operated' naturally in a uranium deposit about two billion years ago. These were in rich uranium orebodies and moderated by percolating rainwater. The 17 known at Oklo in west Africa, each less than 100 kW thermal, together consumed about six tonnes of uranium. It is assumed that these were not unique worldwide.

Fuel

Uranium is the basic fuel. Usually pellets of uranium oxide (UO2) are arranged in tubes to form fuel rods. The rods are arranged into fuel assemblies in the reactor core.* In a 1000 MWe class PWR there might be 51,000 fuel rods with over 18 million pellets.

* In a new reactor with new fuel a neutron source is needed to get the reaction going. Usually this is beryllium mixed with polonium, radium or other alpha-emitter. Alpha particles from the decay cause a release of neutrons from the beryllium as it turns to carbon-12. Restarting a reactor with some used fuel may not require this, as there may be enough neutrons to achieve criticality when control rods are removed.

* In fission, most of the neutrons are released promptly, but some are delayed. These are crucial in enabling a chain reacting system (or reactor) to be controllable and to be able to be held precisely critical.

Pressure vessel or pressure tubes

Usually a robust steel vessel containing the reactor core and moderator/coolant, but it may be a series of tubes holding the fuel and conveying the coolant through the surrounding moderator.

Steam generator

Part of the cooling system of pressurised water reactors (PWR & PHWR) where the high-pressure primary coolant bringing heat from the reactor is used to make steam for the turbine, in a secondary circuit. Essentially a heat exchanger like a motor car radiator.* Reactors have up to six 'loops', each with a steam generator. Since 1980 over 110 PWR reactors have had their steam generators replaced after 20-30 years service, over half of these in the USA.

Containment

The structure around the reactor and associated steam generators which is designed to protect it from outside intrusion and to protect those outside from the effects of radiation in case of any serious malfunction inside. It is typically a metre-thick concrete and steel structure.

Most reactors need to be shut down for refuelling, so that the reactor vessel can be opened up. In this case refuelling is at intervals of 12, 18 or 24 months, when a quarter to a third of the fuel assemblies are replaced with fresh ones. The CANDU and RBMK types have pressure tubes (rather than a pressure vessel enclosing the reactor core) and can be refuelled under load by disconnecting individual pressure tubes. The AGR is also designed for refuelling on-load.

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