Introduction
The 1926 Westclox Big Ben 1A alarm clock is one of the most iconic American alarm clocks of the early 20th century. Known for its rugged steel case, dependable movement, and loud mechanical bell alarm, the Big Ben 1A represents the height of Westclox engineering during the interwar period. These clocks were designed to be affordable, durable, and easy to service, which is why so many examples survive today. Restoring a 1926 Big Ben requires careful attention to the movement, mainsprings, balance wheel, alarm mechanism, and case finish.
This guide provides a complete restoration process for the 1926 Westclox Big Ben 1A alarm clock. It covers the history of the model, the design of its movement, common mechanical issues, step-by-step servicing procedures, case restoration, and long-term maintenance. For restorers seeking authentic replacement parts, VintageClockParts.com offers carefully photographed components for Westclox and other vintage American timepieces.
The Westclox Big Ben Tradition
Origins and early development
Westclox introduced the Big Ben in 1908, and by the 1920s it had become one of the most popular alarm clocks in the United States. The 1A series, produced in the mid‑1920s, featured improved gearing, a more reliable balance wheel assembly, and a louder, more consistent alarm bell.
1920s production
By 1926, Big Ben clocks typically featured:
- All-metal mechanical movement
- Balance wheel escapement
- Two mainsprings (time and alarm)
- Steel or nickel-plated case
- Rear-set alarm and time-setting knobs
These clocks were designed to be rugged and dependable, capable of running for decades with proper maintenance.
The 1926 Big Ben 1A Model
Manufacturer background
Westclox, originally the Western Clock Company, was a major American clock manufacturer known for mass‑produced alarm clocks. The Big Ben 1A is well-documented in collector references and repair demonstrations, showing its compact movement and distinctive alarm mechanism.
Typical features
A 1926 Big Ben 1A typically includes:
- Balance wheel movement with platform escapement
- Bell alarm mounted on the rear of the case
- Stamped steel plates and brass gears
- Painted or nickel-plated metal case
- Glow-painted numerals and hands (radium in original examples)
Identifying an Authentic Big Ben 1A
Maker’s marks and labels
Authentic examples often include:
- “Westclox Big Ben” printed on the dial
- Date stamp on the movement plates
- Original paper label inside the rear cover
Case materials and styling
Big Ben clocks from this era typically feature:
- Steel case with painted or plated finish
- Large rear bell housing
- Classic round dial with bold numerals
Understanding the Big Ben Movement Design
The mainsprings and power system
The Big Ben uses two mainsprings:
- The time mainspring powers the movement
- The alarm mainspring powers the hammer
Both springs must be clean, lubricated, and free of cracks or fatigue.
The gear train
The gear train transfers power from the mainspring to the escapement. Wear, dirt, or bent pivots can disrupt smooth operation.
The balance wheel escapement
The balance wheel regulates the clock’s timing. Proper amplitude, clean pivots, and correct hairspring tension are essential for accurate operation.
Multi-Train Movement Configuration
Timekeeping train
The time train drives the hands and escapement. It must run freely with minimal friction.
Alarm train
The alarm train controls:
- Alarm release mechanism
- Hammer motion
- Alarm duration
The Escapement, Alarm, and Gear Train System
Escapement operation
The balance wheel escapement releases energy to the gear train and regulates the clock’s timing. Wear on the balance staff, pivots, or pallets can cause erratic operation.
Alarm system behavior
The alarm system uses a cam and trip lever to release the alarm mainspring. Dirt, wear, or bent levers can cause weak or inconsistent alarm operation.
Gear train wear
Common issues include:
- Worn pivot holes
- Ovalized bushings
- Dirty or worn gear teeth
Common Problems in 1926 Big Ben Clocks
Dried lubrication
Old oil becomes sticky and increases friction, preventing the movement from running properly.
Worn bushings
Excessive pivot wear causes gears to mesh improperly, leading to stoppage.
Dirty mainsprings
Dirty or dry mainsprings cause uneven power delivery and erratic timekeeping.
Weak or inconsistent alarm
Bent levers, worn cams, or dirty alarm gears can reduce alarm volume or duration.
Balance wheel issues
Bent balance staffs, weak hairsprings, or dirty pivots can stop the clock entirely.
Comprehensive Movement Servicing and Cleaning
Systematic disassembly and documentation
Each component should be removed, photographed, and labeled to ensure proper reassembly.
Cleaning techniques
Cleaning typically includes:
- Removing old oil
- Cleaning mainsprings
- Cleaning the gear train
- Polishing pivots
Mainspring servicing
Mainsprings should be removed, cleaned, inspected, and lubricated. Cracked or set springs must be replaced.
Gear Train, Escapement, and Alarm Service
Gear and bushing replacement
Worn bushings must be replaced to restore proper pivot alignment.
Escapement adjustment
The balance wheel must have proper amplitude and hairspring alignment.
Alarm system adjustment
Alarm cams, levers, and hammer lift must be set correctly for reliable alarm operation.
Case Restoration for Big Ben Clocks
Structural repairs
Metal cases may require dent removal, repainting, or refinishing.
Finish restoration
Depending on condition, restoration may include:
- Cleaning and waxing
- Touch-up of worn finish
- Polishing metal trim
Dial and hand care
Dials and hands should be cleaned carefully to preserve original finishes. Radium-painted hands should be handled with caution.
Final Assembly and Operational Testing
Movement installation
The movement must be reinstalled with proper alignment and secure mounting.
Initial setup
The clock should be tested for:
- Accurate timekeeping
- Reliable alarm release
- Consistent balance wheel motion
- Quiet operation
Performance optimization
Fine adjustments to beat, balance wheel amplitude, and alarm levers ensure long-term reliability.
Long-Term Care and Maintenance
Operating environment
Alarm clocks should be kept in stable temperatures and low humidity to protect metal components.
Maintenance schedule
Cleaning and lubrication every few years extend the life of the movement.
Collector Value and Historical Significance
Market considerations
Big Ben clocks from the 1920s are valued for their durability, nostalgic appeal, and historical importance.
Documentation and preservation
Proper documentation enhances collector value and assists future restorers.
Parts and Restoration Resources
Visit VintageClockParts.com to browse our extensively photographed inventory and find the exact components your project requires. Every part is individually photographed from multiple angles, ensuring you can make informed decisions for your valuable work on Westclox clocks and all other vintage American and European timepieces.
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