Ever wonder how your city sounded before the constant hum of electricity took over everything? In 1925, the heart of Chicago’s business district didn't beep or buzz. It ticked. It was a slow, heavy sound that you could almost feel in your teeth if you stood close enough to the old City Hall. At the center of that sound was a man named Arthur Pendergast. He didn't just work in the tower. For nearly twenty years, he basically lived there. His job was simple but exhausting. He had to keep the giant brass gears turning so the rest of the city stayed on time. Every morning, he climbed four hundred narrow stone steps. He carried a tin lunch box and a heavy can of specialized oil. If he didn't do his job, the whole neighborhood would lose its sense of time within hours. This wasn't just about a clock. It was about the rhythm of thousands of people who relied on that iron pulse to get to work and get home.
By the mid-1920s, the world was changing fast. The city council was looking at new-fangled electric systems that didn't need a man with grease on his hands to keep them going. They wanted something clean. They wanted something that didn't need to eat or sleep. Arthur knew his days were numbered. He spent his final months in the tower writing down every quirk of the machinery. He knew which gear slipped when the humidity got too high. He knew exactly how much oil the main shaft needed after a heavy wind storm. He treated those gears like they were his own kids. It’s hard for us to imagine that kind of connection to a machine now, isn't it? But back then, the machinery was the lifeblood of the city's identity.
What happened
The transition from manual to electric power wasn't just a technical swap. It was a full-scale shift in how the city functioned. On October 12, 1925, the city council officially voted to decommission the manual winding system. Arthur was given a small pension and told to move his cot out of the gear room. The community didn't take it well. Local shopkeepers, who had timed their morning openings to the sound of Arthur's bells, signed a petition to keep him there. They liked knowing a person was responsible for their day. They didn't trust a wire in a wall to tell them the truth. Here is a breakdown of what that manual operation looked like compared to the new system that replaced it.
| Feature | Manual System (1905-1925) | Electric System (Post-1925) |
|---|---|---|
| Daily Labor | 12 hours of winding and oiling | Zero manual labor |
| Power Source | Gravity-fed brass weights | City power grid |
| Accuracy | Subject to weather and grease | Synchronized via pulse |
| Maintenance Cost | $1,200 per year (wages + oil) | $150 per year (electricity) |
Arthur’s routine was a marvel of physical endurance. He didn't just wind a key. He had to use a massive iron crank that required his full body weight to turn. The weights that powered the clock weighed nearly half a ton. As they dropped through the center of the building, they pulled the gears. Arthur’s job was to winch them back up to the top. If he slipped, the crank could break his arm. He had the scars to prove it. He often joked that he was the strongest man in the North Loop, even if nobody ever saw him flex his muscles. He was a shadow in the tower, known only by the steady tolling of the bell every hour on the hour.
The Gear Room Environment
The room where Arthur spent his life was a forest of metal. The gears were made of solid brass and iron. Some were as small as a pocket watch component, while others were four feet across. The air always smelled like a mix of whale oil and cold stone. Because the tower was open to the elements to let the sound of the bell escape, it was freezing in the winter and sweltering in the summer. Arthur wore a heavy wool coat even in July to protect his skin from the hot metal. He kept a small stove in the corner, but he rarely lit it. He was afraid a stray spark might catch the oil rags and send the whole tower up in flames. He lived a life of quiet, careful service. He had a small collection of books, mostly about stars and navigation, because he felt like a captain on a ship made of stone.
- He used four different types of oil for different gear speeds.
- The main pendulum was fifteen feet long and made of seasoned oak to prevent warping.
- The bell itself weighed five thousand pounds and could be heard three miles away on a clear night.
- Arthur kept a logbook of every person who climbed the stairs to visit him, which totaled only twelve people in twenty years.
"The clock doesn't just tell us the time; it tells us we are still here, together. If it stops, I think the city might just stop too." — An unsigned letter found in Arthur's desk, dated 1924.
When the day finally came to flip the switch, Arthur was the one who had to do it. The city engineers didn't know how to handle the old weights safely. He spent eight hours slowly lowering the brass masses for the last time. He greased the gears one final time so they wouldn't rust in their new, permanent silence. Then, he walked down the four hundred steps, handed his keys to a young man in a clean suit, and walked out into the bright Chicago sunlight. He didn't look back. The next morning, the bell rang at 8:00 AM just like always, but the sound was different. It was sharper. It was thinner. The human element was gone. The city had moved into the future, but it had left a piece of its heart in that silent, oily gear room.
