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  • horologie, wind up countdown time-lock mechnaical mechanism

    Discussion in 'Mechanical design JOBS' started by Markxander, Jun 14, 2015.

    1. Markxander

      Markxander New Member

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      Searching for a partner, or free-lance engenier for a max. 5cm radius kitchen timer-like , clockwork mechanical mechanism, wind up mainspring powered, 12hours max option and hours like units timer, that unlocks the box when chosen time has expired.

      Best regards

      Marko Sadzak
       
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    3. K.I.S.S.

      K.I.S.S. Well-Known Member

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    4. Markxander

      Markxander New Member

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      Thank you very much, for the answer. If you have maybe any idea, about materials and mechanics system, and which software to use to design it usually?

      I would like a kitchen timmer like mechanism, with quality metal gear, seen trough 4cm plexy glass circle, and instead of hammer hitting the ring bell, it would release the lock. The mainspring i suppose, should be very strong, to keep up to 12 hours maximum time option, but units only by hour. Anything simmilar did you see in histroy, where the option was only used by hours as units? How to achieve this mechanically and what really are the biggest challenges, by your oppinion?

      Best regards

      Marko
       
    5. K.I.S.S.

      K.I.S.S. Well-Known Member

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      The link I provided is for a Company that manufacturers safe and bank vault time lock mechanisms - these are designed to be set prior to closing the safe door and then when set and the door is closed and the boltwork thrown, they lock and will not unlock until at least one of the movements has wound down to zero. They always use at least two movements for redundancy in case one breaks, and in larger vaults or earthquake sensitive areas, 3 or 4 movements are made use of.
      They are incremented in hours and can typically be set for a maximum of six days (144 hours).
      A strong mainspring isn't required, owing to the operation method - when the safe door is open, a cylindrical bar (called a snubber bar) that is connected to the locking mechanism of the safe, sits inside the body of the time lock housing (you'll see a cylindrical hole on the side of the units on the STB page). When the lock is primed, by pushing in a mechanical button, it compresses a spring.
      When the door is closed and the safe handle is turned, this withdraws the snubber bar from most of the lock body and allows a block of metal to be pushed into the hole (at a 90 degree orientation to the hole bore).
      The mechanism that reaches zero first, slowly withdraws this metal block (over a few minutes), and because of the advantageous gearing, no great power is required.
      You could achieve something similar with a simple mechanical 'kitchen' clock - just have a fairly flimsy circular disc with a offset small hole near the periphery of the disc fitted to the hour hand - when your 12 hour countdown is reached, the hole will line up with a bar that can be driven by an external handle. You just need to design it in such a way that the periphery of the disc is supported so that it won't flex when someone tries the handle and the bar is forced onto the disc.
      Of course, I don't know anything about your design concept, but that would be by far the easiest way, if possible.
      K.I.S.S.
       
    6. K.I.S.S.

      K.I.S.S. Well-Known Member

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      Also, you've posted your request to the wrong section of the forum - this is the jobs sub forum. If you re-post it to the main mechanical design forum, you may get more replies.
      K.I.S.S.
       
    7. K.I.S.S.

      K.I.S.S. Well-Known Member

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    8. Markxander

      Markxander New Member

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      That is great! Thank you very much! In fact, it is not so wrong post, because i really do search for a reliable partner for the project...clockaholic like you are, can you do the prototipe of the watch? Are you interested in partnership or payed prototip making?

      Best regards,

      Marko
       
    9. K.I.S.S.

      K.I.S.S. Well-Known Member

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      Hi Marko,
      I sent you a private message.
      K.I.S.S.
       

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