5 ms·

This image [1] explains the mechanism better. Next, imagine the cord is in fact the shaft of another pair of wheels. [1]http://drgoulu.com/wp-content/uploads/H

by chm 13y ago

This image [1] explains the mechanism better. Next, imagine the cord is in fact the shaft of another pair of wheels. [1]http://drgoulu.com/wp-content/uploads/HLIC/849e60a7d99c30c2af0480c7c5b49d71.jpg http://drgoulu.com/wp-content/uploads/HLIC/849e60a7d99c30c2a...

asdfs 13y ago
I wonder if that image is in public domain. Might be nice to add to the page.
- mvleming 13y ago
  Is it? I don't know how to look for whether a photo is in the public domain, but I did just Google with the image. https://encrypted.google.com/search?tbs=sbi:AMhZZisuyc26lmhJR0LVZESx28a2CpeDWhtXNlFm3m0MD9lQoxeCc92BHOvx1dWvevOt8OKHABd_19Ga0q1CX2MatkZ0Mplq3HEf8-l0YkMFJdX5_1-weidZDktV133A7hlWD1GxN0o28RPcKst7y0e6hauoDH25JZHc-q6X4gKgDud7Vnngf0rDsMcJGAUfDavONeXPdVEbr63ho0IrqY64pegnq5U5704sPTh_1FAKIVbJ4AOuhdHjtuuvPlXg8OtkRSgSfoc4U6CJa7dR2YQBHkGAzbrJ16sQs-voqerWFdfuEi-T5bUjAkvQGl46qx3Biv21_1L4wQQqP9zn0UIFDr5hOIFPFet5dPO57-qdvbFyx0Z7yC62qz6tBeon-Ivvkl6eEIKSnINpWWOpbsscBNwD7Ff5lZuQ64FkVVCPL_1Ru1bnn83nTvt8DwjfnWnqWmLfVy5_1LNKOZp97rhxf-8sGbYD0q5C00AIDUgZXp8yS27hPYtgm1I_1rcBplIMHu6KoZAtcPRxw6EbtgMvU3kFIKJDO8qvoEMiw8SXlWp6QusCM8N8y2wCEO2T88lWienzL0uhFlFrs2s7RbJwcWo2rnEBUOe9-6zBPM4ppDtyOQ-1L9VJvJP8gIDYHXRu2_1AyVjShwl1dw39yNRd3L7dL7tOzCxt550EewK4mfAwSxu23C-Cwjnb5R5CzWQtkOCXUWkbx8MX5m5L2rUyj6mv1Jz0jV7u7M1-FiWhAFddPQhFHOKoW2NjLQMZIKGuRMpFoEH_1pqo-5AETU4VzYF84w3w9ADzHzPw7uTaqHdw6cEIdpSnhD5mNXnZu7hvCxO8Vk26Jhzn4g7T2DlF-D72LRcXL0Ez03lVK0eNK-aDJBjZDyIhV-GJkwmEP8sPgBeh2Q_1Z53QM0-BChrXowF_1a5PDBi79IDzG6KajebXYvpw8-d3qJq_1jB6Fl73PkTGmTtpS6KzUSIHLwGL0iYBP1gggqk9AhwvE21NSB0DPqfaU-apdzOT5KDOrLC3xrQ7MiNxUiZFv-b6UsxauD0ifJqelDjxlB0R15CBH6p-1SBg927vnNaOjjqK9ngxPE2bcl-1_1yiTydNwtQKRre6BgVaqCI1GL2GpxmbfeD0U3MY8ZtIkyuOzf4JBCHAct7ydy9md4zlCg6yLVuY6UmjyRmi2gqYodC2twuiQTvKJOEohaIpRkOnnLwL3XQM-gjnBdNIDn2lV2gbRYC2Yao_11nnlv1LTCGqUu2gx97Z_1aqe6_1cro-OoOCOYiMgt659E_1WXCaf1q6qZCegjP0VTIsC55iFmxfCK3xcMz_1Ax1D3zAxNtKTia5u8FloYAJs https://encrypted.google.com/search?tbs=sbi:AMhZZisuyc26lmhJ...
- chm 13y ago
  I linked to it from here: http://www.drgoulu.com/2005/12/29/eviteur-daxe/ http://www.drgoulu.com/2005/12/29/eviteur-daxe/ .
foobarqux 13y ago
No kidding: "The device works by using a spoked, rimless wheel that allows cables to pass through as it rotates. The ends of the spokes are widened, and the cable is held together by a short curved sleeve through which these spoke ends slide."
randomfool 13y ago
The workers at the Ballard locks in Seattle used to use these because of some safety regs (for a short while). They all hated them because they jammed up all of the time. Wish I knew the name of the mechanism they used, it looked interesting enough to get me talking to one of the workers about it. Edit- the best I can find is either something called a 'starpass glider' mentioned on page 14 of http://s7d9.scene7.com/is/content/minesafetyappliances/Horizon%20Horizontal%20Lifeline%20Instruction%20Manual%20-%20EN http://s7d9.scene7.com/is/content/minesafetyappliances/Horiz... or http://www.saferack.com/lifeline-cable-systems-fall-protection.cfm http://www.saferack.com/lifeline-cable-systems-fall-protecti... The system I saw at the locks seemed like a better engineered system, from what I remember.
dwaltrip 13y ago
How is the top curved portion (that "cable to mine" connects to) affixed to the gear and thus the other half of the cable? I can't tell from the picture. If it is simply connected to the gear axle, won't that block the sweep wire from passing through?
- LancerSykera 13y ago
  The teeth of the wheel are holding on to it, and it looks like there are always two teeth inside the top.
  - dwaltrip 13y ago
    Oh I see what you mean. The teeth slide through the curved channel, and are notched such that the channel is held in place. That is a clever design.
    - jarin 13y ago
      It's clever as long as you operate in a zero-friction environment :)
      - sanoli 13y ago
        That's what I thought also. Wouldn't the amount of force pulling on the cable lead to some jamming as soon as the little spokes stopped spinning so freely?
      - lambda 13y ago
        I'm wondering if the effects of friction could be mitigated by having ball bearings within the channel that the teeth pass through.
elwell 13y ago
I think the most interesting thing about that image is that the text seems to be written by hand. What excellent handwriting!

by chm 13y ago

asdfs 13y ago

I wonder if that image is in public domain. Might be nice to add to the page.

mvleming 13y ago
Is it? I don't know how to look for whether a photo is in the public domain, but I did just Google with the image. https://encrypted.google.com/search?tbs=sbi:AMhZZisuyc26lmhJR0LVZESx28a2CpeDWhtXNlFm3m0MD9lQoxeCc92BHOvx1dWvevOt8OKHABd_19Ga0q1CX2MatkZ0Mplq3HEf8-l0YkMFJdX5_1-weidZDktV133A7hlWD1GxN0o28RPcKst7y0e6hauoDH25JZHc-q6X4gKgDud7Vnngf0rDsMcJGAUfDavONeXPdVEbr63ho0IrqY64pegnq5U5704sPTh_1FAKIVbJ4AOuhdHjtuuvPlXg8OtkRSgSfoc4U6CJa7dR2YQBHkGAzbrJ16sQs-voqerWFdfuEi-T5bUjAkvQGl46qx3Biv21_1L4wQQqP9zn0UIFDr5hOIFPFet5dPO57-qdvbFyx0Z7yC62qz6tBeon-Ivvkl6eEIKSnINpWWOpbsscBNwD7Ff5lZuQ64FkVVCPL_1Ru1bnn83nTvt8DwjfnWnqWmLfVy5_1LNKOZp97rhxf-8sGbYD0q5C00AIDUgZXp8yS27hPYtgm1I_1rcBplIMHu6KoZAtcPRxw6EbtgMvU3kFIKJDO8qvoEMiw8SXlWp6QusCM8N8y2wCEO2T88lWienzL0uhFlFrs2s7RbJwcWo2rnEBUOe9-6zBPM4ppDtyOQ-1L9VJvJP8gIDYHXRu2_1AyVjShwl1dw39yNRd3L7dL7tOzCxt550EewK4mfAwSxu23C-Cwjnb5R5CzWQtkOCXUWkbx8MX5m5L2rUyj6mv1Jz0jV7u7M1-FiWhAFddPQhFHOKoW2NjLQMZIKGuRMpFoEH_1pqo-5AETU4VzYF84w3w9ADzHzPw7uTaqHdw6cEIdpSnhD5mNXnZu7hvCxO8Vk26Jhzn4g7T2DlF-D72LRcXL0Ez03lVK0eNK-aDJBjZDyIhV-GJkwmEP8sPgBeh2Q_1Z53QM0-BChrXowF_1a5PDBi79IDzG6KajebXYvpw8-d3qJq_1jB6Fl73PkTGmTtpS6KzUSIHLwGL0iYBP1gggqk9AhwvE21NSB0DPqfaU-apdzOT5KDOrLC3xrQ7MiNxUiZFv-b6UsxauD0ifJqelDjxlB0R15CBH6p-1SBg927vnNaOjjqK9ngxPE2bcl-1_1yiTydNwtQKRre6BgVaqCI1GL2GpxmbfeD0U3MY8ZtIkyuOzf4JBCHAct7ydy9md4zlCg6yLVuY6UmjyRmi2gqYodC2twuiQTvKJOEohaIpRkOnnLwL3XQM-gjnBdNIDn2lV2gbRYC2Yao_11nnlv1LTCGqUu2gx97Z_1aqe6_1cro-OoOCOYiMgt659E_1WXCaf1q6qZCegjP0VTIsC55iFmxfCK3xcMz_1Ax1D3zAxNtKTia5u8FloYAJs https://encrypted.google.com/search?tbs=sbi:AMhZZisuyc26lmhJ...
chm 13y ago
I linked to it from here: http://www.drgoulu.com/2005/12/29/eviteur-daxe/ http://www.drgoulu.com/2005/12/29/eviteur-daxe/ .

foobarqux 13y ago

No kidding: "The device works by using a spoked, rimless wheel that allows cables to pass through as it rotates. The ends of the spokes are widened, and the cable is held together by a short curved sleeve through which these spoke ends slide."

randomfool 13y ago

The workers at the Ballard locks in Seattle used to use these because of some safety regs (for a short while). They all hated them because they jammed up all of the time. Wish I knew the name of the mechanism they used, it looked interesting enough to get me talking to one of the workers about it. Edit- the best I can find is either something called a 'starpass glider' mentioned on page 14 of http://s7d9.scene7.com/is/content/minesafetyappliances/Horizon%20Horizontal%20Lifeline%20Instruction%20Manual%20-%20EN http://s7d9.scene7.com/is/content/minesafetyappliances/Horiz... or http://www.saferack.com/lifeline-cable-systems-fall-protection.cfm http://www.saferack.com/lifeline-cable-systems-fall-protecti... The system I saw at the locks seemed like a better engineered system, from what I remember.

dwaltrip 13y ago

How is the top curved portion (that "cable to mine" connects to) affixed to the gear and thus the other half of the cable? I can't tell from the picture. If it is simply connected to the gear axle, won't that block the sweep wire from passing through?

LancerSykera 13y ago
The teeth of the wheel are holding on to it, and it looks like there are always two teeth inside the top.
- dwaltrip 13y ago
  Oh I see what you mean. The teeth slide through the curved channel, and are notched such that the channel is held in place. That is a clever design.
  - jarin 13y ago
    It's clever as long as you operate in a zero-friction environment :)
    - sanoli 13y ago
      That's what I thought also. Wouldn't the amount of force pulling on the cable lead to some jamming as soon as the little spokes stopped spinning so freely?
    - lambda 13y ago
      I'm wondering if the effects of friction could be mitigated by having ball bearings within the channel that the teeth pass through.

elwell 13y ago

I think the most interesting thing about that image is that the text seems to be written by hand. What excellent handwriting!