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  1. Pressed

    Leonardo DaVinci's self propelled cart --- follow up

    This is an addendum to josephv's post about the self propelled cart: http://www.eng-tips.com/viewthread.cfm?qid=226118&page=2 This is a new show that is a bit goofy with the characters they use, but they do the work and it is part of the genre that is...
  2. Pressed

    Reverse Engineering

    Not the kind of reverse engineering I have experience with, but an interesting look at how MS launches and updates it's OS software with respect to exploits, according to the speaker. Video is long, but the main ideas are covered in the first 1/4. I liken this as a good example of the idea...
  3. Pressed

    Drafting History

    Just an interesting look back on how they did things different and the same as we do today. This survey from 1918 shows answers to questions about drafting from various sources. http://www.flyupload.com/?fid=736837 ========================================== Business Page...
  4. Pressed

    Doors that seemingly disappear

    If you hate fooling with doors and their restrictions, this might be a solution. http://www.youtube.com/watch?v=liHkY1_muSo http://www.youtube.com/watch?v=AAtkoje4-eM http://www.youtube.com/watch?v=Qjj0_hdAtjY I wonder how they would compare to the side impact of trucks with the extra...
  5. Pressed

    Stainless credited to?

    Who is credited with inventiing stainless steel? Which is right? The source? ======================================================= 1912 Krupp, after intensive research developes the first stainless, acid-resistant steels. 1913 Max Mauermann in Mürzzuschlag, Austia invented stainless steel...
  6. Pressed

    Franchise II

    There are franchises available that offer the service of saving expenses for clients. They include energy savings along with a host of other expenses, a couple of franchises deal only with saving energy for a client. A google for franchise+energy gives some reference data. Anybody familier...
  7. Pressed

    Helical shaft source

    Hi I am looking for a 4" (100 mm) or longer helical grooved/geared shaft in the OD range from 3/16 - 1" (5 - 25mm). Will consider any material as I have various applications. I want to pursue buying a stocked item primarily, I know the vendors to ask for specials and don't want that. In my...
  8. Pressed

    What would you do?

    This question for me is years over but I thought about it the other day and I would like to hear what others would have done given the situation. On a normal day working in your office and told to come to a mandatory meeting about the United Way (large US charity). At the meeting there you...
  9. Pressed

    Survivor: XP or DOS ??

    If I had to pick a software package (specialized database type) between one that works on XP or DOS with the following in mind: I will be spending hundreds of hours inputing info and want to use this data for decades. Not sure of the longevity or future of this XP based software company or...
  10. Pressed

    Unworkable Devices and misconcenptions

    More about engineering than history, but educational. The Physical Principles of Unworkable Devices. http://www.lhup.edu/~dsimanek/museum/physgal.htm I am not as sure about this site, but here it is. http://www.eskimo.com/~billb/miscon/miscon4.html Just found them and thought I'd share...
  11. Pressed

    1930's pressure standard

    Hi I would have put this in the History section but I think here is more appropriate! The thread link below is one where I answered another fellows question about the origination of the RPMs of a tractor PTO. Nobody continued the thread much and I am looking if anybody has more info...
  12. Pressed

    Silicon Nitride parts sourcing

    Hello I currently source silicon nitride parts from one of the big US ceramic companies and am wanting to re-source for lower cost; currently around $100. The part is 1" diameter x 1" tall with an axial tapered hole that has a radius on the big end. Any suggestions? I found a company in...

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