Tag: timetrax

Relocating A Shelf Clock To A…Well, A shelf

For years, my Seth Thomas column and cornice clock rested atop an antique radio in our living room. However, after redecorating the space with hardwood flooring in place of the carpet, the radio and clock no longer suited the updated space.

Seth Thomas column and cornice "Empire" style time and strike shelf clock
Seth Thomas column and cornice “Empire” style time and strike weight driven shelf clock

I did not want to relegate the clock to storage, so I opted to find it a new spot in our home. Since most of the other rooms already had plenty of clocks, I decided to display it in my office.

This lovely Seth Thomas time and strike eight-day weight-driven column and cornice clock with hour strike features an attractive veneer case with cove molded crest, lyre movement, three-quarter columns in painted gold, and two glass doors, one with a reverse painted design, opening to the interior clock works which reveal a tin painted dial and the original printed and illustrated Seth Thomas clock makers label. It is 32″ tall, 18″ wide and 5“ deep.

The dial had some losses

The clock has one unique detail: while the lower tablet is original, the upper tablet was recreated from a photograph of hanging fruit, modified to complement the design below. Additionally, the dial, which had suffered some losses in the corners and chapter ring, was repainted.

The painted tin Roman Numeral dial has hand-decorated flower spandrels in all four corners with the centre portion of the brass lyre movement visible through the dial.

Among collectors an appropriate descriptor for this clock is “column and cornice” but it is also generally classified as a shelf clock. This particular clock features a hook on the top of its case, likely intended by a past owner for installation that way. While I have seen similar clocks mounted like this online, they were never originally designed to be hung.

However, the hook might serve an additional purpose. Given that these clocks can become top-heavy when fully wound, the hook could be an effective way to secure the clock to a wall, especially in areas where it might be easily bumped.

Building the Shelf

The first step was to build a shelf to accommodate the clock. I had some leftover 8-inch-deep pine boards from a previous project, which were ideal for this purpose. I purchased extra pine braces some time ago, and they turned out to be perfect for completing the project. I cut a piece about 22 inches long and painted it a shade of beige. The base of the clock is 18 inches leaving 2 inches on either side.

Pine board and braces

The next step was to mount the braces to the wall. Knowing the room had studs spaced 16 inches apart, I used a stud finder to locate the first stud and then measured 16 inches to find the second one.

Sixteen inches on centre

Once the braces were mounted and made level I installed the shelf using wood screws.

The clock is positioned on the shelf

Checking for the Correct Beat

Now to determine if the shelf is level and the clock is in beat. Using a Timetrax Clock Timing Machine I switched to the BAL feature to check the beat.

Timetrax microphone attached to the winding arbour

A beat adjustment was unnecessary as the clock was already leveled. If leveling were needed, it would simply involve slightly bending the crutch incrementally to find the beat. While checking the beat can easily be done by ear, it made sense to use my Timetrax device for greater precision.

Timetrax Clock Timing Machine

According to the Timetrax instruction manual If the beat is within plus or minus 20 the clock is in beat. In this case, it was almost dead on.

Seth Thomas clock mounted on a shelf (note repainted dial)

Once the beat is confirmed, the weights are replaced, the hands and dial can be reattached, and the pendulum is given a slight push.

After confirming the beat the clock was ready to be displayed in its new spot. This Seth Thomas column and cornice clock, with its exquisite veneer case and distinctive features, now takes pride of place in my office, where it brings an added touch of elegance to the room. Moreover, since the room houses many spring-driven clocks, a weight-driven clock will provide a more accurate reference for timekeeping.

I’m pleased to have found a new location for it, as it truly deserves to be on display.

Hamburg Amerikanische Uhrenfabrik | Servicing an 8-day Countwheel Strike Movement – Part II

I am currently working on a mantel clock from the Hamburg American Clock Company. This is Part II in a two-part series. For Part I go here.

The Hamburg American Clock Company is otherwise known as Hamburg Amerikanische Uhrenfabrik or HAU and in many parts of the world, it is simply known as HAC.

HAC mantel clock circa 1926

In Part I, I described the steps taken so far which are disassembly, inspection, cleaning of the parts, and polishing of all pivots. The next steps are bushing work, reassembly, oiling (the mainsprings were oiled in a previous step), and finally, testing.

I believe this is the No. 36 movement by HAC.

HAC clock movement
HAC clock movement #36

The wheels that spin the fastest typically show the most bushing wear, but wear can also appear in other areas, such as the main wheels, which endure significant torque. For instance, I observed punch marks on the cap side of each mainspring barrel. While punching around any bushing hole is generally poor practice, it appears this was done at some point in the clock’s history and can’t be reversed. Nonetheless, the repair seems to have held up well.

Bushing Work

I have seen similar movements with much more wear than this one, but I felt that some bushing work was necessary to extend the clock’s lifespan.

Bergeon Bushing Machine
Bergeon Bushing Machine

Six Bergeon brass bushings were installed in total. For the time side (T), bushings were placed at T1 (front and back) and T3 (back). For the strike side (S), bushings were installed at S3 (back), S2 (front), and S4 (front). The numbers indicate the wheel location in the train beginning from the bottom. A couple of pivot holes were borderline, but I decided to leave them as they are.

Reassembly

It pays to be patient and methodical during reassembly. Rushing can lead to mistakes, such as missing steps or improperly aligning parts, which could cause malfunctions or even damage later. Taking the time to carefully double-check the placement of parts, and ensure everything is in its correct place will help ensure the reassembly is smooth and successful.

An older HAC movement, without the barrel cutouts

Once the wheels are in place the lever and there is only one multi-arm ever that resides between the plates. Position it such that the long arm rests in one of the deep slots of the count wheel while a short arm is placed in the cut out of the cam wheel (as above).

Positioning the pivots is a delicate process, and any forceful handling can result in a bent or broken pivot. In this, as in all cases when aligning pivots, a pivot locator is your best tool.

Pivot locator

My usual practice is to position all the wheels and the lever(s) on the plate with the movement posts, first. Once the wheels are correctly located, I lower the front plate onto the back plate. I secure two nuts to the mainspring end which prevents the movement plates from coming apart as I position the upper wheels in the train.

The pin-wheel, which is uppermost and one wheel removed from the fly on the strike side, is placed in approximately the 12 o’clock position, the warning position. At the same time the hammer paddle is positioned between two of the points on the star wheel. More than once I have had to go back in to make minor adjustments when the paddle hangs up on one of the star points. It looks like this one is also a candidate for that very adjustment.

A Timetrax machine is used to adjust the beat and the rate of the movement.

The movement has been placed on a test stand and the time side Is in beat and running as it should according to my Timetrax machine. Curiously, the Timetrax manual lists only one HAU/HAC movement, a three-train one but this one is likely similar to Junghans bracket clock movements which runs at 164 bpm. Junghans is mentioned for comparison because, by 1930, the company had successfully taken full control of HAC.

Testing

The testing phase is crucial in the process of servicing a clock, often taking the most time because it ensures that the clock is functioning properly before it is reunited with its case.

On the test stand

During this phase, the clock is put through various operational checks to simulate real-time performance, which helps in identifying any issues that may not have been apparent during the initial servicing or cleaning process. Issues such over-tightened or loose components can present themselves as well as problems with the escapement mechanism.

The testing phase serves as an important diagnostic step to identify what further repairs or adjustments may be needed.

This concludes the servicing of an 8-day HAU/HAC movement. If you have any comments or feedback on any of the steps in the process, please feel free to share!

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