Carpet Sweeper

Bissell claims a wheeled case whose running wheels spin a brush roller that sweeps dirt into a pan — and the brush is driven from its centre so it can tilt to follow the floor. Note both.

Cut and fold a shallow open-bottomed box from stiff cardboard — this is the sweeper case that will roll on the floor.

Push a dowel axle through each end of the box and add a wheel on each side. The box now rolls when you push it.

Wrap a stiff brush around a dowel to make a roller, and mount it across the middle of the box, just clearing the floor. This is the sweeping brush.

Loop a rubber band from a wheel axle to the brush spindle, or let a wheel rim rub the brush. Now turning the wheels turns the brush.

Roll the sweeper forward. The wheels drive the brush so it spins fast as you push — the sweeper makes its own sweeping motion from your push, no motor.

Sprinkle crumbs or rice on the floor and run the sweeper over them. The whirling bristles flick the dirt up and back into the box instead of just pushing it along.

Notice the brush is turned at its middle, its ends free. Press one end down: the roller tilts but keeps turning — the whole brush can rock to follow the floor.

Sweep across a ruler or a fold in a rug. The tilting brush stays in contact and keeps sweeping, where a stiff end-mounted brush would lift off and miss the dirt.

Sweep the same crumbs with a stiff broom. It pushes them into a pile you must then collect; the sweeper picks them up as it goes and stores them. Note the difference.

Lower the brush until it just kisses the floor. Too high misses dirt; too low drags and stalls. Find the sweet spot — real sweepers have a screw to adjust this.

Open the box and empty the collected dirt. Everything the brush threw up stayed inside — a self-emptying sweeper you carry, not a broom-and-pan two-step.

The patent. US 182,346, "Carpet-Sweeper", granted 19 September 1876 to Melville R. Bissell of Grand Rapids, Michigan. Bissell kept a crockery shop, and the straw packing dust made his wife Anna sneeze; he built the sweeper to clean it up. Anna ran the business into a global company after his early death — one of the first women to head a major American firm.

The mechanism is a friction gearing. The running wheels are, in effect, the drive: geared or belted to the brush spindle, they spin the roller far faster than the sweeper itself moves, so a gentle push whirls the bristles fast enough to flick grit up off the pile and into the pan (steps 5-7). No motor, no cord — the energy is entirely yours, just re-aimed from forward motion into rotation.

Bissell's real improvement was the centre drive and the compensating brush. Earlier sweepers drove the brush from its ends, which pinned the roller rigidly; on a worn or uneven carpet it would lift off in the low spots and miss the dirt. By driving from the middle and letting the ends float, Bissell let the brush rock and tilt to follow the floor (steps 8-9), sweeping evenly over bumps and hollows. It is the same idea as a floating cutting head on a lawn mower or a self-aligning bearing — let the working part follow the surface instead of forcing the surface to be flat.

Where it sits. The carpet sweeper ruled the parlour for decades and still sells today, quiet and cordless, for a quick clean-up. It is the direct ancestor of the powered vacuum's beater brush — Spangler's 1908 suction cleaner simply added a motor and a fan to the same rotating-brush idea. The little box you pushed here, wheels whirling a floating brush into a dust pan, is Bissell's machine in miniature, and it works for exactly the reason his did.