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  • Users: dteich
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  1. dteich

    Need a torsion spring 100 NM at 45 degrees

    Application is to protect an installation from abuse. The driveshaft will be connected to the external arm through a torsion spring. At 45 deg rotation of the arm we need at least 100 NM resistance. It would be great if we could allow 120 degrees arm rotation without killing the spring, at...
  2. dteich

    U Clip Stress Analysis

    We designed a U clip 0.87" long, 0.62" wide and 0.62 high, made of 0.060" spring steel. The force the clip needs to work under (and yield to) is up to 1,000 lbs. at its tips (the two tips get compressed together half way with a 0.25" metal in the middle of the U preventing it from overtravel)...
  3. dteich

    433 MHz flat antenna design

    Our product (www.designatedparking.com) is a 20" aluminum partially spherical housing 3" tall with a 4" plastic canopy under which the antenna lies. We use a spiral antenna with estimated gain of -14dbD, and the range is only 40 feet with a -112 db receiver. We need at least twice that range...
  4. dteich

    Barrier adhesion to asphalt and concrete

    We need to glue a base of a barrier device for parking spaces, for applications where anchors are not allowed. The barrier yields after 200 lb. is applied horizontally at a height of 15" from the ground. If curious, the application can be seen on www.dp-corp.com. Any suggestions as to...

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