Re: [Cameramakers] Springs and Spring Backs
On Thu, 25 Jan 2001, Bradley M. Small wrote: O! So the lift handle is only joined to the ground glass frame in the center. Then the lift handle is connected to the camera back. So basically ti si very similar to the Giant Mouse Trap. I think you've got it! - Wayde ([EMAIL PROTECTED]) ___ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers
Re: [Cameramakers] Springs and Spring Backs
On Thu, 25 Jan 2001, Bradley Small wrote: 4. Magic Layton Spring Back -- THis one confused me so I am not sure I understand it correctly, as the gg seems to be bond at the center and the end and is sprung in an opposing direction. It doesn't appear that it would be able to sit flat on the film holder, but ther emust be some movement I can't grok. This has a big U shaped frame (lift arm) that is hinged at the open end against the back frame. The closed end of this U is the handle. The ground glass frame is hinged at its midpoint and attached to the sides of the U. It then uses coiled springs attached between the sides of the lift arm and the back frame to hold the whole thing down against the camera back. We can try an ASCII diagram (you'll have to turn off proportional text in your mail reader for this to work.) ... The O's are the hinge points and the @ symbols the connection points for the springs. You are looking straight at the camera back, and you'd pick up on the lift handle on the right hand side to slide the film holder in from the right. -@-| O O | Lift Handle --- | | | | | | | | Ground| | | Glass | | | | | | | | --- | O O | -@-| ^ ^^ | || Hinge Hinge Coiled Spring If you've got the article, there is actually a pretty good picture of this mechanism there. The ground glass frame rotates freely around the verticle axis in this diagram. Anyone have any others? Anyoen have any experiences with any of these that they love or hate? Any reccomendations or warnings on these? What are the spring materials that you all incorporate? I have seen hacksaw blades, bandsaw blades, windshield wipers, rubber bands. Or people just buy these things industrially somewhere? Yes, and you forgot to include piano wire and springs scrounged from other equipment. If brass or other non-ferrous springs are to be made, how does one make such a thing? Basically the same way you make one using ferrous metals. I understand that non-ferrous metals don't temper the same way as ferrous ones... Yes and no, the problem is that you may find yourself wanting to work with beryllium copper. The dust from this is quite toxic and I wouldn't recommend it. Scrounged or purchased springs and spring steel are probably the simplest approaches. - Wayde ([EMAIL PROTECTED]) ___ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers
Re: [Cameramakers] Springs and Spring Backs
Good point about berryllium copper Wade: However, it is safe to work berryllium copper if you keep the chips .004 or thicker. The thing is to keep it out of the air you breath as you said "the dust". So avoid grinding red copper colored metals unless you know it does not contain copper guys. If you for some ridiculous reason think you must grind or file copper run water on it all the time at the tool/part interface to keep the dust out of the air. It is a better bet just to avoid the stuff. Tyler. --- "J. Wayde Allen" [EMAIL PROTECTED] wrote: On Thu, 25 Jan 2001, Bradley Small wrote: 4. Magic Layton Spring Back -- THis one confused me so I am not sure I understand it correctly, as the gg seems to be bond at the center and the end and is sprung in an opposing direction. It doesn't appear that it would be able to sit flat on the film holder, but ther emust be some movement I can't grok. This has a big U shaped frame (lift arm) that is hinged at the open end against the back frame. The closed end of this U is the handle. The ground glass frame is hinged at its midpoint and attached to the sides of the U. It then uses coiled springs attached between the sides of the lift arm and the back frame to hold the whole thing down against the camera back. We can try an ASCII diagram (you'll have to turn off proportional text in your mail reader for this to work.) ... The O's are the hinge points and the @ symbols the connection points for the springs. You are looking straight at the camera back, and you'd pick up on the lift handle on the right hand side to slide the film holder in from the right. -@-| O O | Lift Handle --- | | | | | | | | Ground| | | Glass | | | | | | | | --- | O O | -@-| ^ ^^ | || Hinge Hinge Coiled Spring If you've got the article, there is actually a pretty good picture of this mechanism there. The ground glass frame rotates freely around the verticle axis in this diagram. Anyone have any others? Anyoen have any experiences with any of these that they love or hate? Any reccomendations or warnings on these? What are the spring materials that you all incorporate? I have seen hacksaw blades, bandsaw blades, windshield wipers, rubber bands. Or people just buy these things industrially somewhere? Yes, and you forgot to include piano wire and springs scrounged from other equipment. If brass or other non-ferrous springs are to be made, how does one make such a thing? Basically the same way you make one using ferrous metals. I understand that non-ferrous metals don't temper the same way as ferrous ones... Yes and no, the problem is that you may find yourself wanting to work with beryllium copper. The dust from this is quite toxic and I wouldn't recommend it. Scrounged or purchased springs and spring steel are probably the simplest approaches. - Wayde ([EMAIL PROTECTED]) ___ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers __ Do You Yahoo!? Yahoo! Auctions - Buy the things you want at great prices. http://auctions.yahoo.com/ ___ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers
Re: [Cameramakers] Springs and Spring Backs
An old machinists trick to file copper, aluminum or any soft metal is to rub the teeth of the file with chalk. This not only will keep the file from Loading up, the chalk "sticks" to the filings and keeps them from flying around. There are special wheels for grinding and cutting non-ferrous metals. I forgot what they are called, but they also have a special coating that prevents that keeps the grinding surface from filling up. These coatings are designed to somehow keep the dust down. If one must work with beryllium copper or any of the variants, a simple dust mask will go a long way to preserving your lungs. For what it's worth. Joe Portale Tucson, AZ - Original Message - From: Tyler Samson [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, January 25, 2001 4:28 PM Subject: Re: [Cameramakers] Springs and Spring Backs Good point about berryllium copper Wade: However, it is safe to work berryllium copper if you keep the chips .004 or thicker. The thing is to keep it out of the air you breath as you said "the dust". So avoid grinding red copper colored metals unless you know it does not contain copper guys. If you for some ridiculous reason think you must grind or file copper run water on it all the time at the tool/part interface to keep the dust out of the air. It is a better bet just to avoid the stuff. Tyler. --- "J. Wayde Allen" [EMAIL PROTECTED] wrote: On Thu, 25 Jan 2001, Bradley Small wrote: 4. Magic Layton Spring Back -- THis one confused me so I am not sure I understand it correctly, as the gg seems to be bond at the center and the end and is sprung in an opposing direction. It doesn't appear that it would be able to sit flat on the film holder, but ther emust be some movement I can't grok. This has a big U shaped frame (lift arm) that is hinged at the open end against the back frame. The closed end of this U is the handle. The ground glass frame is hinged at its midpoint and attached to the sides of the U. It then uses coiled springs attached between the sides of the lift arm and the back frame to hold the whole thing down against the camera back. We can try an ASCII diagram (you'll have to turn off proportional text in your mail reader for this to work.) ... The O's are the hinge points and the @ symbols the connection points for the springs. You are looking straight at the camera back, and you'd pick up on the lift handle on the right hand side to slide the film holder in from the right. -@-| O O | Lift Handle --- | | | | | | | | Ground| | | Glass | | | | | | | | --- | O O | -@-| ^ ^^ | || Hinge Hinge Coiled Spring If you've got the article, there is actually a pretty good picture of this mechanism there. The ground glass frame rotates freely around the verticle axis in this diagram. Anyone have any others? Anyoen have any experiences with any of these that they love or hate? Any reccomendations or warnings on these? What are the spring materials that you all incorporate? I have seen hacksaw blades, bandsaw blades, windshield wipers, rubber bands. Or people just buy these things industrially somewhere? Yes, and you forgot to include piano wire and springs scrounged from other equipment. If brass or other non-ferrous springs are to be made, how does one make such a thing? Basically the same way you make one using ferrous metals. I understand that non-ferrous metals don't temper the same way as ferrous ones... Yes and no, the problem is that you may find yourself wanting to work with beryllium copper. The dust from this is quite toxic and I wouldn't recommend it. Scrounged or purchased springs and spring steel are probably the simplest approaches. - Wayde ([EMAIL PROTECTED]) ___ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers __ Do You Yahoo!? Yahoo! Auctions - Buy the things you want at great prices. http://auctions.yahoo.com/ ___ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com
