Concussion is no joke. Repeated concussions are believed to cause cumulative damage, leading to mental problems for a range of different athletes.

Among those at risk are American Football players.

Many attempts are being made to lessen the problem by redesigning helmets.

Today’s invention approaches the issue from a different direction.

Players would have a uniform limit set on their momentum. This would be achieved by fitting boots with studs in the shape of overgrown ballpoint pen nibs.

Accelerometers in the boots would detect someone’s change in speed during a play. Once their momentum reached the limit, the balls in their studs would be forced outwards, allowing the balls to roll against the astroturf and causing them to lose some traction.

The heaviest linemen and linebackers would thus have a speed limit imposed on them that was much lower than the lighter, faster players.

This would stop them from colliding with players with momentum sufficient to cause even small-scale brain damage.

Fighter planes have had ejectable crew modules before.

Today’s invention is variant on that theme. A plane with a very low-weight front end, including canard wings (orange), is shown in the lower image.

Should the crew need to leave in a hurry, a secondary wing, which is stowed under the long axis of the fuselage, is rotated about its central axis.

This allows the pilot to pull the nose up a little and detach the crew module in the form of a small glider (upper image). This uses only aerodynamic forces, keeps the crew together and maintains pilot control.

Not only does this cause less injury to crew members than normal ejection but it also gives them some hope of gliding back home -or at least to a safer location.

When I’m running longish distances I like to carry water.

There are several problems associated with lugging a bladder-type system…mostly to do with the perpetual taste of plastic and the difficulty of cleaning the damn thing out.

I prefer bottles, but these thrash about asymmetrically and get in the way, even if I run economically (which I usually don’t).

Today’s invention is a belt which has a set of bottles attached. Each ‘bottle’ is effectively a wide hip flask which has notches in which other flasks can slide up and down.

Each flask rests on a spring so that as liquid is drunk from any one it maintains the position of its centre of mass. The centre of mass of the whole system therefore stays nearly in the same position throughout a distance event.

There are only two flasks shown in the figure, one with red liquid and one with blue. The multiflask approach allows a runner to carry several different types of liquid for different stages of a marathon for example. It also lessens the tendency to generate large wave motion inside a single vessel.

Shopping in bricks-and-mortar supermarkets sometimes drives me crazy.

The layout of produce is determined by some central office guru, with degrees in marketing psychology, who wants you to see beer after you just bought peanuts…so these unrelated products will be placed adjacent to one another.

Today’s invention is therefore a new way to lay out products in a store, which will educate consumers and remain static over time.

The floor would have a scale map of the world painted on it.

Products’ shelves would be placed at the locations of their country of origin.

If you want an authentic Mexican meal or to dine as a locavore, this approach would help you out.

It would also allow people some sense of exploration and to ask questions about how produce from country X is cheaper than from their own local farms.

Today’s invention is an alternative prosthetic limb attachment.

A user would have ferrous discs screwed into the bone of the affected limb (red). The tissue would heal over, lessening the risk of infection, when compared eg to titanium rods which protrude through the skin.

A close fitting ‘boot’ would encase the stump…but much less tightly than conventional equipment which often restricts air movement to the skin.

The boot would be slipped on over the stump. A motorised screw device would then be used to insert these magnets (blue) into locations in the boot walls, under control to avoid bruising.

In use, the stump would be held firmly in an equilibruim position.

A small amount of springy, vertical movement provided by the magnetic field would add to the comfort of wearing it.