Introduction

The E. Ingraham Company was one of the major American clock manufacturers of the late 19th and early 20th centuries. By around 1920, Ingraham was producing robust 8-day brass movements used in mantel, kitchen, and wall clocks across their product line. These 8-day movements are known for their straightforward design, durable gearing, and reliable time-and-strike operation, making them excellent candidates for full restoration today.

This guide focuses on repairing a circa 1920 E. Ingraham 8-day clock movement. It covers how to identify an Ingraham movement, how the time and strike trains are laid out, common wear points, and a step-by-step process for disassembly, cleaning, mainspring servicing, bushing installation, reassembly, and final regulation. For those needing replacement gears, mainsprings, or hardware, VintageClockParts.com offers extensively photographed parts for Ingraham and other American makers.

Identifying a 1920 E. Ingraham 8-Day Movement

Movement markings

Authentic Ingraham movements typically include:

• Stamped name: “E. Ingraham Co.” or similar on the rear or front plate
• Patent or date codes: sometimes stamped near the logo or lower on the plate
• 8-day configuration: two large mainspring barrels or coils on the plate

Case and dial context

A 1920 Ingraham 8-day movement may be found in:

• Pressed-oak or veneered mantel clock cases
• Kitchen clocks with ornate fronts
• Some wall clocks of the period

Even if the case is damaged or swapped, the movement stamping and layout will clearly identify it as an Ingraham unit.

Understanding the 8-Day Movement Design

Power system and trains

A typical 1920 Ingraham 8-day movement includes:

• Two mainsprings: one for the time train, one for the strike train
• Time train: drives the center arbor, minute hand, and escapement
• Strike train: controls hour strike on a gong or bell
• Escapement: American recoil escapement with a pendulum

The design is efficient and accessible, but after a century of use, wear and dried oil are universal.

Strike system

Most Ingraham 8-day movements of this era use a countwheel strike system:

• A countwheel with deep and shallow notches
• Lever that rides the countwheel to determine strike count
• Warning and locking levers to control when the strike starts and stops

Correct strike operation depends on lever alignment, clean pivots, and proper timing between the time and strike trains.

Common Problems in 1920 Ingraham 8-Day Movements

Dried and gummy oil

Ingraham movements that have not been serviced in decades typically have:

• Thick, sticky oil at pivot holes
• Dirt and oxidation mixed into pivot areas
• Increased friction leading to stoppage or weak running

Worn pivot holes and bushings

Long-term use causes:

• Oval-shaped pivot holes in plates
• Gears to tilt and mesh poorly
• Loss of power, especially in the upper wheels of the train

Mainspring issues

Original mainsprings may be:

• “Set” (coils tight, reduced power)
• Dirty and dry
• Cracked or fatigued at the inner or outer ends

Strike miscounts or failure

Strike problems often arise from:

• Bent or worn strike levers
• Dirty countwheel and related pivots
• Incorrect positioning of stop pins or warning wheel

Pendulum and beat problems

If the movement is out of beat or the crutch is misaligned, the clock may:

• Run for a short time and stop
• Have uneven tick-tock sound
• Lose or gain significant time

Step-by-Step Repair Process

1. Initial inspection and testing

Before disassembly:

• Check if the movement will run at all with gentle assistance
• Note strike behavior and any unusual noises
• Photograph both sides of the movement in the case

This provides a baseline and a visual reference for reassembly and lever positions.

2. Safe mainspring let-down

Always let down the mainsprings before disassembly:

• Use a proper let-down key or handle
• Control the arbor while releasing the click
• Fully relax both time and strike mainsprings

This prevents plate damage and reduces risk during movement separation.

3. Disassembly and documentation

With springs safe:

• Remove the movement from the case, noting pendulum length and crutch position
• Photograph the strike side, especially the countwheel and lever arrangement
• Carefully remove nuts or screws and separate the plates

Lay out gears and levers in order to preserve train orientation.

4. Cleaning the movement

Proper cleaning restores power and reduces wear:

• Remove heavy dirt and oil from plates and gears
• Clean pivots and pivot holes thoroughly
• Inspect wheels for bent teeth, cracks, or rust

After cleaning, the movement should be free of visible residue before reassembly.

5. Mainspring servicing

Each mainspring should be:

• Removed from its barrel or arbor
• Cleaned to bare metal
• Inspected for cracks, sharp edges, and severe set
• Lubricated lightly with clock mainspring lubricant

Replace any mainspring that shows cracking, deep pitting, or extreme set to ensure reliable 8-day operation.

6. Pivot and bushing work

To restore proper power transfer:

• Polish all pivots to a smooth, bright finish
• Check each pivot hole for oval wear
• Install bushings where necessary (especially upper train wheels)

Bushing work is critical on older Ingraham movements; skipping it often results in a clock that only runs weakly or intermittently.

7. Reassembly and lubrication

When reassembling:

• Assemble gear trains between the plates, ensuring all pivots are properly seated
• Tighten plate screws evenly
• Apply small amounts of proper clock oil only to pivot holes and appropriate contact points

Avoid over-oiling; excess oil will attract dust and shorten the service interval.

Setting Up the Time and Strike Functions

Time train and escapement

With the movement back together:

• Install the escapement verge and confirm proper lock and drop
• Attach the pendulum and adjust the crutch so the beat is even
• Test run on a stand for a full wind to verify strength and reliability

Strike train setup

Set the strike system correctly by:

• Aligning the strike train so it stops in warning and then releases at the hour
• Ensuring the countwheel lever falls cleanly into the notches
• Adjusting hammer lift so the hammer hits the gong firmly but without bounce

A properly adjusted strike train will start cleanly at the hour and stop after the correct number of blows.

Final Regulation and Case Reinstallation

Regulation

Once installed back in the case:

• Adjust pendulum length to bring the time close to accurate
• Make small changes over several days to refine accuracy
• Confirm that the clock runs reliably for a full 8-day cycle

Case considerations

While the focus is the movement, you may also:

• Stabilize any loose case joints
• Clean and wax the finish
• Clean the dial and hands carefully, avoiding damage to original paint or printing

Parts and Restoration Resources

A successful repair of a 1920 E. Ingraham 8-day movement often requires replacement parts such as mainsprings, bushings, strike levers, or even complete wheels if teeth are damaged. To source correct components:

• Look for Ingraham-specific mainsprings and gears that match original dimensions
• Use properly sized bushings to restore pivot support
• Replace missing or damaged hardware with period-appropriate screws and nuts

Visit VintageClockParts.com to browse an extensively photographed inventory of Ingraham movements, gears, mainsprings, and small hardware. Each part is individually photographed from multiple angles, helping you match the exact components you need to bring your 1920 E. Ingraham 8-day clock movement back to dependable, long-term service.

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Frequently Asked Questions

How often should a 1920 Ingraham 8-day movement be serviced?

Under normal conditions, an Ingraham 8-day movement should be cleaned and lubricated approximately every 7–10 years. Movements that have not been serviced in decades usually require full disassembly, mainspring service, and bushing work.

Can I just oil my Ingraham movement without disassembling it?

Surface oiling without cleaning generally does more harm than good. On a 100-year-old movement, the old oil and dirt must be removed, and worn bushings addressed, or the clock will continue to run weakly or stop.

Do I need to replace the mainsprings in every restoration?

Not always. If mainsprings are clean, not cracked, and provide good, even power after proper cleaning and lubrication, they can often be reused. However, obviously cracked, heavily pitted, or severely set springs should be replaced.