I’m making an 83-inch tall walnut grandfather clock from a set of old Mason&Sullivan plans. There are some conflicts in the plans for the hood section that I can’t resolve — maybe errors, since I’ve already found some in other sections of the case — and I’m wondering if there’s a typical order of pieces between the hood door and the face of the clockworks. The plans show a full width plywood piece called the “dial mount”, which has no purpose that I can tell, another piece of plywood called a “dial frame”, which is about the same size, and two arched pieces of walnut that form the milled framework (behind the door) that form the typical arched surround for the clock face. If you know of a way to interpret these plans, or might have a resource suggestion, I’d appreciate your input. Jim
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Replies
Jim,
Do you have the movement that's going into the case? And does it have a dial with it? Typically, old clocks will have a thin (about 1/8- 3/16") frame that is attached to the sides, bottom, and top of the hood to hide the space between the edges of the dial and the inside of the case. This frame's width will vary with the size of the dial, and the size of the hood, usually it will be between 1 and 2". The vertical elements of the frame ("stiles") are often half-lapped to the "rails", and the frame is variously attached to the hood with glue blocks, or laid against a rabbet in the hood side, or glued into a groove ploughed into the sides.
Most old clock dials are attached to the movement's front plate with three or four posts, and so the seatboard and movement with dial attached must be located so the frame just comes to the dial when the hood is slid into place. The length of the movement's handshaft must be taken into consideration when locating the setback of the frame, or else the handshaft may hit the inside of the glass of the hood's door. (Don't ask how I figured that out :)
All the measurements required for placement of the different elements are keyed to the dimensions of the movement...it's REALLY risky to build the case and then shop for a set of works.
I seem to remember that Mason and Sullivan dials are mounted to the hood, not attached to the movement. Perhaps that is what the extra pieces in your plans are for?
Regards,
Ray
Thank you very much for that explanation, Ray. It may help me to form a plan to continue. Right now I'm stuck. All I have to go on from the original M&S plan is conflicting details in the drawing without explanations of what or how to proceed. Yes, I do have the movement (an Urgos triple chime) and a matching moving moon dial that has four mounting posts. I made a mockup for the movement, chimes and dial to proof the dimensions for mounting, so I do know what will be needed for the front-to-back locations. What has me stumped are those plywood pieces and what they're for. I'll take your explanation to the shop and see if it works. If they are just spacers that fit behind the hood frame and don't actually show, that might explain it. Nowhere does the plan state what the cutout area is supposed to be -- whether the plywood is inside or outside (front to back) of the dial face or whether the area to be cut out frames the dial or what.
Also, since you seem to be knowledgeable about clocks, do you have a source for Urgos movements? This one may need repair or replacement.
Jim,
You might try S. LaRose Inc. 3223 Yanceyville St. P.O. Box 21208 Greensboro, NC 27420 (Tel 336-621-1936 for tech info), http://www.slarose.com. The catalog I have has some Urgos parts, perhaps they can help you.
Regards,
Ray
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