Comments on: Drive Assembly - test fit http://thesalmonfarm.org/blog/2007/04/10/drive-assembly-test-fit/ Bloggin' down on the Farm - news and happenings from the Salmon Farm. A blog on various topics including my thoughts on collaborative technology, personal information in the 21st century, the global internet (or the lack there of), dog training, cooking, architecture, and whatever happens to be a pet peeve on any given day ! Tue, 06 Jan 2009 02:55:08 +0000 http://wordpress.org/?v=2.7 hourly 1 By: Glen http://thesalmonfarm.org/blog/2007/04/10/drive-assembly-test-fit/comment-page-1/#comment-1047 Glen Thu, 12 Apr 2007 00:22:15 +0000 http://thesalmonfarm.org/blog/2007/04/10/drive-assembly-test-fit/#comment-1047 I found the source I was looking for -> http://www.horology.com/htr-towr.html (down near the bottom). I found the source I was looking for -> http://www.horology.com/htr-towr.html (down near the bottom).

]]> By: Glen http://thesalmonfarm.org/blog/2007/04/10/drive-assembly-test-fit/comment-page-1/#comment-1046 Glen Wed, 11 Apr 2007 21:30:11 +0000 http://thesalmonfarm.org/blog/2007/04/10/drive-assembly-test-fit/#comment-1046 I can't find the section from "A rudimentary Treatise ..." but I recall reading somethign about this. To the best of my recollection ... If the motion works (the mechanism directly attached to the large exterior hands of the tower clock) is rigidly connected to the going train (the clock gear mechanism), then, in the event the hands of the tower clock freeze, become damaged, or otherwise get 'stuck', the clock will attempt to keep running and will force the works. This could break any number of parts in the clock. The worse case scenario is that it breaks a gear that decouples the drive weight(s) from the escapement. Since the escapement is the only think slowing the gears down, the results would be catastrophic as the gears accelerate in a "run-away". You can imaging the force of a 200lb weight falling 50ft down a tower ! I can’t find the section from “A rudimentary Treatise …” but I recall reading somethign about this. To the best of my recollection …

If the motion works (the mechanism directly attached to the large exterior hands of the tower clock) is rigidly connected to the going train (the clock gear mechanism), then, in the event the hands of the tower clock freeze, become damaged, or otherwise get ’stuck’, the clock will attempt to keep running and will force the works. This could break any number of parts in the clock. The worse case scenario is that it breaks a gear that decouples the drive weight(s) from the escapement. Since the escapement is the only think slowing the gears down, the results would be catastrophic as the gears accelerate in a “run-away”. You can imaging the force of a 200lb weight falling 50ft down a tower !

]]> By: Roy http://thesalmonfarm.org/blog/2007/04/10/drive-assembly-test-fit/comment-page-1/#comment-1045 Roy Wed, 11 Apr 2007 19:26:49 +0000 http://thesalmonfarm.org/blog/2007/04/10/drive-assembly-test-fit/#comment-1045 oh right- you did splain that before.. Sorry - fergut.. The question came up today because I was reading the book Early American Tower Clocks and came across the notion of freewheeling or disengagement of the pallets to fast forward the time train. The book said it was a risky procedure when the pallets were re-engaged.. I don't particulary understand why that would be risky.. oh right- you did splain that before.. Sorry - fergut.. The question came up today because I was reading the book Early American Tower Clocks and came across the notion of freewheeling or disengagement of the pallets to fast forward the time train. The book said it was a risky procedure when the pallets were re-engaged.. I don’t particulary understand why that would be risky..

]]> By: Glen http://thesalmonfarm.org/blog/2007/04/10/drive-assembly-test-fit/comment-page-1/#comment-1044 Glen Wed, 11 Apr 2007 17:21:24 +0000 http://thesalmonfarm.org/blog/2007/04/10/drive-assembly-test-fit/#comment-1044 The arbor corresponding to the minutes hand has a square end. This allows for a sizable "T" handle to be placed on the end and turned. You can see the end of arbor (passing through the pilot face) in my post about "cleaning with catchup". The train gear on this arbor is "attached" by friction. There is a (very) brief description and a picture in the post on "Methods for gear attachment". The friction plat allows the arbor to be turned without advancing the gears of the train. At the other end of the arbor is the gear that connects to the lead-off up to the motion works. So, turning the "T" handle, moves the minute hand of the pilot face and subsequently moves the "big hands" on the exterior clock faces. The arbor corresponding to the minutes hand has a square end. This allows for a sizable “T” handle to be placed on the end and turned. You can see the end of arbor (passing through the pilot face) in my post about “cleaning with catchup”.

The train gear on this arbor is “attached” by friction. There is a (very) brief description and a picture in the post on “Methods for gear attachment”.

The friction plat allows the arbor to be turned without advancing the gears of the train. At the other end of the arbor is the gear that connects to the lead-off up to the motion works. So, turning the “T” handle, moves the minute hand of the pilot face and subsequently moves the “big hands” on the exterior clock faces.

]]> By: Roy http://thesalmonfarm.org/blog/2007/04/10/drive-assembly-test-fit/comment-page-1/#comment-1043 Roy Wed, 11 Apr 2007 16:56:21 +0000 http://thesalmonfarm.org/blog/2007/04/10/drive-assembly-test-fit/#comment-1043 Hey Glen - You are very kind thank you. I have a question about the clock. What kind of mechanism does it have to enable setting the time? Does it have some sort of clutch or freewheeling capability? Best, Roy Hey Glen -

You are very kind thank you. I have a question about the clock. What kind of mechanism does it have to enable setting the time? Does it have some sort of clutch or freewheeling capability?

Best,
Roy

]]> By: Glen http://thesalmonfarm.org/blog/2007/04/10/drive-assembly-test-fit/comment-page-1/#comment-1042 Glen Wed, 11 Apr 2007 03:35:13 +0000 http://thesalmonfarm.org/blog/2007/04/10/drive-assembly-test-fit/#comment-1042 glad you are following along. My pics don't tell a story nearly as well as your Tabblos. Also hope you didn't catch the website in the midst of my image compression marathon. I discovered WLW has been making fat JPEG files so I downloaded everything. compressed them and uploaded the results. Some pics were off-line for a few minutes. glad you are following along. My pics don’t tell a story nearly as well as your Tabblos. Also hope you didn’t catch the website in the midst of my image compression marathon. I discovered WLW has been making fat JPEG files so I downloaded everything. compressed them and uploaded the results. Some pics were off-line for a few minutes.

]]> By: Roy http://thesalmonfarm.org/blog/2007/04/10/drive-assembly-test-fit/comment-page-1/#comment-1041 Roy Wed, 11 Apr 2007 03:26:14 +0000 http://thesalmonfarm.org/blog/2007/04/10/drive-assembly-test-fit/#comment-1041 Hi Glen, The clock is gonna look sweet when it's running again. Thanks for posting pictures of the work as you progress. Best, Roy. Hi Glen,

The clock is gonna look sweet when it’s running again. Thanks for posting pictures of the work as you progress.

Best,
Roy.

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