Tag: mainspring

New Batch of Timesavers 15959 Clock Mainsprings

November 30, 2012 | By | Reply More
New Batch of Timesavers 15959 Clock Mainsprings

I wrote before about the Timesavers 15959 clock mainspring, specified as 3/4 by 0.0165 by 120 inches. My latest batch of these springs are different: they have a copper rivet and the loop is formed from the spring itself (i.e., not a separate piece). Also, the spring is thinner, the one I used is 0.0153 […]

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Last updated December 1, 2012

Strong Mainsprings Will Wear Out Your Antique American Clock!

October 15, 2012 | By | 3 Replies More
Strong Mainsprings Will Wear Out Your Antique American Clock!

Many antique American clocks have mainsprings that are stronger than necessary. The most popular replacement mainsprings are even stronger than the originals. These strong replacement springs cause wear to the main wheel teeth and pivot holes. Thinner mainsprings are available, and should be used to replace old replacement springs that are too strong. Here is […]

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Last updated October 15, 2012

Seth Thomas Oak Shelf Clock

August 1, 2012 | By | Reply More
Seth Thomas Oak Shelf Clock

I repaired this Seth Thomas shelf clock and installed new mainsprings because they had previously been replaced with springs that were too strong. The case is 22 3/8 inches tall and 14 3/4 inches wide. The minute hand is 2 13/16 inches long. I replaced the dial because the original was in very bad condition. […]

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Last updated July 22, 2012

Seth Thomas Lyre Movement in Fancy Round Drop Case

September 13, 2011 | By | Reply More
Seth Thomas Lyre Movement in Fancy Round Drop Case

My customer sent this movement to be repaired, because the clock fell off the wall, bending the center arbor and causing 2 gears to come out of the movement plates. The movement has the nice thin original Seth Thomas mainsprings. Time Mainspring: 11/16 inch wide by 0.0165 inch thick. Strike Mainspring: 11/16 inch wide by […]

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Last updated September 5, 2011

Measurement of Mainsprings for 8-Day American Antique Clocks, June 2010

June 12, 2010 | By More
Measurement of Mainsprings for 8-Day American Antique Clocks, June 2010

Over the past three years, I’ve posted about mainsprings for antique American clocks. I started with a post on June 12, 2007 about a mainspring from Merritt’s Antiques. Most clock parts distributors offer a “standard” American loop end 8-day mainspring 3/4 inch wide by 0.018 inch thick and 96 inches long. These springs are too […]

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Last updated August 31, 2011

Schatz Standard 400 Day Clock, ca. 1950 with Badly Broken Mainspring!

May 31, 2010 | By | Reply More
Schatz Standard 400 Day Clock, ca. 1950 with Badly Broken Mainspring!

This Schatz 400 day clock came into my shop for repair. The customer told me that it had a broken mainspring. On disassembly, I found that the mainspring was broken in more than 15 pieces! (Normally, a mainspring has just one break). See photos below: What caused the spring to break into multiple pieces? The […]

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Last updated May 29, 2010

New Batch of P-1956 Clock Mainsprings

April 29, 2010 | By | Reply More
New Batch of P-1956 Clock Mainsprings

Two years ago, I wrote about the P-1956 mainspring from Merritt’s Antiques. This spring was ideal for many antique American clocks. My newest batch of these mainsprings (received late in 2009) are weaker than the first batch I had. When removed from their clamp, they open out to only 5 1/2 inches (my first batch […]

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Last updated May 8, 2010

Seth Thomas Adamantine Clock Movement with Thin Time Mainspring

December 20, 2009 | By | 4 Replies More
Seth Thomas Adamantine Clock Movement with Thin Time Mainspring

I recently repaired a Seth Thomas Adamantine mantel clock made around 1905. It has a No. 89 movement. This movement is very efficient in operation, due to the use of a deadbeat escapement. Even with a thin time mainspring, these movements typically take an excellent escapement motion. This particular example has thin, original mainsprings. Time […]

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Last updated June 5, 2010

Junghans W202 Clock Movement

November 24, 2009 | By | 2 Replies More
Junghans W202 Clock Movement

I repaired this Junghans W202 clock movement. It has the numbers 33 3 on the back which may be a date code of March, 1933; does anyone know if this is correct? The biggest weakness of this movement is that the mainsprings are attached to their barrels by tongues cut out of the barrel wall […]

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Last updated November 26, 2009

1866 Patent for American Style Loop End Clock Mainsprings

November 19, 2009 | By | Reply More
1866 Patent for American Style Loop End Clock Mainsprings

I recently overhauled a William Gilbert walnut shelf clock from the 1880s. The loop ends of the mainsprings were labeled: W. Barnes Patented Nov. 27, 1866 The NAWCC Library & Research Center was able to give me the number of this patent: 59,943, issued to Wallace Barnes. Then I was able to find the patent […]

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Last updated November 19, 2009

Seth Thomas Mahogany Adamantine Mantel Clock

November 16, 2009 | By | 2 Replies More
Seth Thomas Mahogany Adamantine Mantel Clock

“Adamantine” was Seth Thomas’ trademarked name for a celluloid finish over wood. Besides the mahogany color shown here, it was made in black, white, green, brown, tan and other colors. These cases are durable, and can usually be polished to look very nice. Sometimes the colors fade with age. Adamantine clocks were made from about […]

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Last updated June 5, 2010

Mainsprings for a Gilbert 1880s Parlor Clock

November 1, 2009 | By | Reply More
Mainsprings for a Gilbert 1880s Parlor Clock

I repaired this Gilbert “Parole” shelf or parlor clock that was made about 1880. The walnut case is 19 1/4 inches tall. I polished the pivots and installed bushings (a previous repairer had punched the pivot holes to try to close them). The clock had its original mainsprings, both of which were marked “W. Barnes […]

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Last updated August 31, 2011

Original Mainsprings in a New Haven Long Drop Octagon Clock

October 22, 2009 | By | Reply More
Original Mainsprings in a New Haven Long Drop Octagon Clock

I repaired this New Haven long drop octagon clock. Some of the pinions had worn wires, so I replaced the wires in one pinion and reversed the wires in three. I polished the pivots and installed 13 bushings. The mainsprings appear to be original (they match in color and style and look old). Time mainspring: […]

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Last updated August 31, 2011

Mainsprings for Sessions Black Mantel Clock

October 22, 2009 | By | 2 Replies More
Mainsprings for Sessions Black Mantel Clock

I recently overhauled this Sessions black mantel clock from around 1903 – 1910. It was a routine overhaul including polishing the pivots and installing bushings. A previous repairer had installed two screw-in bushings (a no-no!). I replaced these with KWM size 4 American bushings. The mainwheels were made with Gilbert-style clicks, which are more robust […]

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Last updated August 31, 2011