Waterbury Oak Shelf Clock with Steel Plate Movement

June 27, 2011 | By | 1 Reply More

This Waterbury oak cased shelf (kitchen) clock was made around 1903 and is called “Amherst”. It is 21 3/4 inches tall (a small piece is is missing at the top, it should be 22 inches tall) and 15 inches wide. The hands are original Waterbury blackened brass Maltese style. The minute hand is 2 9/16 inches long from center to tip. The paper dial of this clock is original but worn.

The movement plates are 5 inches tall and 3 7/16 inches wide, and marked 5 3/8 (referring to the length of the pendulum). This movement is designed to use thin loop end mainsprings 3/4 inch wide. When the clock came into the shop, it had a strike mainspring 0.0142 inch thick, and a time mainspring 0 .0172 inch thick. The thicker time mainspring has caused significant wear to the time mainwheel teeth (the teeth on the time mainwheel are 20 % worn, which the strike mainwheel teeth are only 5% worn). The springs were slightly rusty, and I replaced them with Merritt’s Antiques part number P-1496 in the red and yellow package. I selected a spring 0.0156 inch thick for the striking, and 0.0158 inch thick for the time. The pendulum motion is excellent and the striking speed could actually be slower and still be reliable.

This was one of the most badly worn clock movements I have seen! It was very dirty when received. All of the pinion wires needed replacing. The pinion wires of the fan fly were over half way worn through! The movement must have been sprayed with something to keep it going without being cleaned for many years, and the dust adhering to the gear teeth acted as an abrasive, causing the wear to the pinions). All of the pivots needed polishing, and I installed 12 bushings. The pallets had deep wear grooves which I polished out.

The movement plates are steel (with brass plating for decoration), and brass bushings (they were made like this instead of solid brass for a few years – Gilbert also made some like this, so did Ingraham but  without the brass bushings!).

See more photos.

Repair job 5487.


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Category: American Clock Mainsprings, American Clock Repair

Last updated: August 31, 2011

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  1. Jen says:

    What is the approx. value of this clock ? I have just found one in an attic.
    Thanks

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