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I repaired this Seth Thomas tambour chiming mantel clock. It has the No. 124 Westminster chime movement, made from 1924 through 1956. (After 1956, Seth Thomas imported Hermle chime movements from Germany.)

The case on this clock is 20 1/2 inches wide and 9 1/2 inches tall. The minute hand is 2 5/16 inches long, and the beautiful dial is silvered brass with applied numerals and engraved time track.

See more photos.

Repair job 5090. The No. 124 takes a lot of repair work to run reliably. The pivots are short, and each bushing must be countersinked enough for the pivot to protrude (or else the pivot will “tunnel in” to the hole and eventually stop the clock).

I cleaned the movement parts longer than usual to remove very sticky old oil. I polished the pivots and installed 21 bushings, smoothed the warning and lift levers and the lobes on the center cam. The loose strike warning pin was tightened, and the missing chime correction pin on gear c4 was replaced. The chime mainspring barrel hook was tightened, and solder was removed from the strike fly.

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Some quartz (battery operated) chiming clocks sound much better than others. A major factor of sound quality is the mounting of the speaker that produces the sound.

In some clocks, the speaker is mounted inside the case and the sound cannot project outward. These clocks have quiet, tinny sounding chime.

The best clocks have the speaker mounted over an opening in the case. The sound of these clocks is rich and full-bodied. The volume of sound can also be louder. Many Hermle clocks have the speaker mounted this way.

The photos below give examples of good and not-so-good speaker mounting.

Brief Explanation:

When a speaker does not have a baffle around it, the sound waves generated by the front of the speaker cone cancel out the sound waves generated by the back of the cone below a certain frequency. With a small speaker such as used in clocks, all the bass response is lost in this way. Mounting the speaker on a baffle (such as a board) creates a longer path for the sound waves, reducing cancellation. The larger the baffle, the lower the frequency response extends. Even a small baffle will make the speaker sound much better.

See information about the Hermle 70687-N92215 Chiming Wall Clock

See information about the Hermle 22825-i92115 Chiming Mantel Clock

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A customer received a new Hermle chiming wall clock, and when it chimed or struck, all the notes sounded bad because the hammers were too close to the chime rods. The fix was simple:

1. Tighten the four nuts on the back of the case,
2. Slightly loosen the two Phillips head screws on the back of the case,
3. Move the iron chime rod base so that the chime rods are about 1/16 to 1/32 inch below the hammer heads,
4. Securely tighten the two screws.

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I recently added chime and strike sounds of many of the Hermle and Chelsea clocks to the Bills Clockworks web site. It was challenging to record the sounds and have them sound realistic. The microphone had to be located close to the clock (about 8″ away) or else too much background noise was picked up and the recording was not loud enough, but the closeness over-emphasized the mechanical noises from the movement (such as the click made near the end of the chime when the strike is being activated). In real life, the listener is not aware of these sounds when she is located several feet or more away from the clock.

A challenge was to make the sound buttons compatible with as many types of computers as possible. I did not want a sound player window to pop up, I wanted just a button that the user can click to play the sound. On some windows PCs, the user must give permission the first time a button is clicked. Macintosh computers that I have tested handle the sound fine.

Please test these sounds on your PC and let me know if they play. Also tell me the type of PC (Mac or windows), operating system (such as Windows XP or Vista), and the web browser (such as Explorer 6 or 7). You may leave a comment below. These two links will open a new window or tab in your browser:

Hermle Chime and Strike Sounds

Chelsea Ship’s Bell Strike Sounds

Thanks!

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