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Horological Times May Have Problems with One Drum Mechanism

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Use our BB505 Combination 510- Set of 4 extra large double-sided straight wall plugs ..................$52.00 B505- BB Press plus BB 508 for closing case back. 610 - Press plus all fixtures ..............................................................$540.00 CLOCKS & WATCHES HOROLOGICAL 8 As A Clockmaker Turns, By J.M. Huckabee Riveting Techniques for the Clockmaker TIMES I 16 Music Box Clocks, By Leo A. Jaroslaw Twelve-Tune Music Box With Six Bells, Part 7 CONTENTS 20 Safe Watchmaking, By Stanley McMahan VOLUME 20 , NUMBER 2 FEBRUARY 1996 22 Repairing Mechanical Watches & Clocks, By Henry B. Fried Forming the Overcoil, Part XII-B 28 Technically Watches, By Archie B. Perkins Antique Watch Restoration, Part CXXII, Selecting and Fitting Flat Hairsprings 32 How To Make A Verge Watch Escape Wheel, By Robert D. Porter 38 The Novice Watchmaker, By David A. Christianson Cleaning and Polishing Watch Cases, Part II 36 A Practical Course in Clock Repair, By John P. Kenyon Making A Grinding Slip, Unit 1 DEPARTMENTS EDUCATION 2 President's Message 46 Education Update By Joseph L. Cerullo 4 Questions & Answers By Henry B. Fried 6 AskHuck By J.M. Huckabee 12 Pickle Barrel By Marshall F. Richmond 19 Affiliate Chapter Column By Jack Kurdzionak 35 Book Review By Henry B. Fried 44 Rock Quarry et tu By Fred S. Burckhardt 49 AWi Material Search Network 50 Industry News 52 Classifieds ON THE COVER: Cover shot taken in Olathe, Kansas by Herman 56 Advertising Index Selecting a hairspring. See details on Kirkpatrick of Overland Park, Kansas. page 28. HUCK By J.1\1. Huckabee, Cl\IC, FBHI Erratic Pendulum I like the system IBM The Merits of Main­ duced force during winding. Function used on their lower-grade taining Power It requires an anti-backlash Mod. 17 Master Time Con­ ratchet and paul to hold the trol (Regulator) Movement. stored energy during wind­ What makes pen­ What is the best 1bis unit was a 60-beat Gra­ ing. In order for the setup to Q• dulum adjustment Q • form of maintaining ham-sty le escapement with be accomplished automati­ erratic? 1bis is often a prob­ power? Does it really keep the a high-grade wooden pendu­ cally, the stored energy is lem when adjusting for a motive power steady? close rate. lum rod. A pretty fine time­ less than normal operating keeper for a low-cost pendu­ force. If a stronger storage Let's discuss this lum. On the back side of the spring is used, it must be set Let's talk about • subject with relative A four-pound disc-type ball A up just prior to winding by • some examples that merits of various methods. I was a leaf spring that held the lashing the key backward. may cover one of your prob­ like dual-weight drive. 1bis rod snug in the pendulum 1bis is a good system; the lems. Loose pieces, joints, is simple and works quite passageway. 1bis spring was one I used when building my and attachments are the first well, but there is less than tight enough that the nut shop regulator. thing to look for. The ball one-half power during wind­ could be removed and the The endless chain sys­ needs to fit close enough to ing. We are operating on one ball remain in place. Adjust­ tem is also very good. Its the rod that it cannot shift weight, and some reduction ment was made by slacking negative point is that vari­ position, no matter how is caused by winding the al­ the nut several turns, then the able chain length and weight small the value. This may ternate weight where the re­ ball was driven down by between winding periods occur when it is stopped for serve power is in excess of light strokes of a soft-faced modulates the drive force adjustment. Another item is two times minimum require­ hammer, and all regulation somewhat. the adjusting nut. It should ment. 1bis is a good method. was made by adjusting the Differential winding is be long with lots of threads . A barreled mainspring pendulum ball upward. 1bis very good, but expensive so that it presents a smooth is a good form. The gear train assured that there was no and complicated. 1bis is the and flat surface to the ball. is supplied by the outside slack in the ball-rod assem­ method used for many years It's best for the lower ball end of the mainspring, and bly. Tuning rate of the nut in IBM Mod. 35 Master surface to be machined flat winding is to the inside end was about twenty seconds Time Controls. 1bis system to mate with the nut. It is im­ of the spring. This system per turn, per day. 1bis was a adds some drive force dur­ perative that these surfaces works nicely. However, the little unconventional, but ing winding. do not have a cam-action that motive power is a little those old timers could eas­ All of these systems would prevent nut rotation greater during winding, and ily hold a half-minute per work quite well in the prac­ ~d thus ball lift, from bein~ may be very great when we month which is very good tical world, even though linear motion. All ornaments reach the point of full wind. for a wooden rod pendulum. each of them has some nega­ should be securely attached. Winding must be done with You will generally find tive points. 'e Be sure that the suspension great care because the final your erratic adjustments to spring is tight in its chops, force of winding is transferred be some mechanical prob­ and all rod joints are tight. directly to the gear train. If you have any lem in the pendulum. In addition, the crutch hook­ Another system uses an que tfon please wrire: up should be friction-free. energy storage spring built 'Ask Huck"' Most lower-grade clocks into the great wheel and cord do Horological Times may have problems with one drum mechanism. This 7-01 Enterpri eDrive or more of these factors. works well, but supplies re- Harri on, Ohio 45030 6 HOROLOGICAL TIMES Riveting the rivet is upset with a heavy cross­ ASA Many pieces encountered by the stake. This precludes our ability to clockmaker are assembled by rivet­ drive it out of the plate. A second ing techniques. This is one of the smaller rivet, with a similar upset is CLOCKMAKER oldest methods of assembly, and also shown. Each of these will be re­ widely used by all industries, even moved, new rivets made, and in­ to this day. Riveting frequently stalled. TURNS shows up in clock repair as one of The smaller rivet is shown in the most poorly executed jobs of Figure 3. Because of the spring it se­ previous repairs. This is strange, cures, the head is less accessible RIVETING because it is one of the most basic than the piece in Figure 1. To remove TECHNIQUES FOR skills we use. An old craftsman once these rivets, the upset end must be told me, "Huck, you can make a removed to permit the piece to be THE CLOCKMAKER quick assessment of a worker's skills driven through to the plate outside. by looking over the riveting and Our first step is to prick-punch the By J.M. Huckabee, CMC, FBHI staking work." upset end. In Figure 2, a prick-punch was placed in the cross-stake cen­ Objective ter. This prick should be in rivet cen­ This material will relate to two ter, but here it is slightly off center types of rivets: one that is used as a as required by the cross-stake. A structural fastener, and the other as bench top drill press will cut away a journal for a working clock com­ the upset area.
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