The poor old signature is running out of steam as a guarantee of identity in this digital era.

The shape of a signature alone is very easy to fake, given just limited amounts of practice. Those systems which still use signatures tend to monitor the dynamics of how the letters are formed just as much as the final image…and this requires cameras, touchscreens, accelerometers and who knows what else in terms of computing.

Today’s invention is a ballpoint pen which writes, as normal, on any old piece of paper but which whose output incorporates biometric information about the dynamics of the writer’s hand.

Think about writing with a tube of stripey toothpaste, except that the stripes are of different colours (or consist of dots and dashes with different mark/space frequencies). Scale this idea down a little and you have a pen which will output different ink composition, from millisecond to millisecond, dependent upon the direction of movement of the ball relative to the barrel. (Obviously, the pen would need to be held consistently -perhaps by moulding in fingerpads into the outside of the pen itself).

This could be detected (coarsely) using only a magifying glass and would reduce any doubt about the ownership of a signature or even of an author’s manuscript. In particular, a computer loaded with statistical directional characteristics of one’s writing could generate a phrase (in black and white text) for a signatory to copy and have analysed to confirm their claims.

Each eye has a ‘blind’ area containing no photoreceptors, where the optic nerve connects to the retina.

Even for people with two working eyes, it’s perfectly possible to be unaware of small objects when their images fall into retinal blindspots. Normally such an image will correspond with only one eye’s blindspot, leaving the other eye clear to see it.

If one eye is, however, obstructed by a door pillar, and the image of the object in question falls within the other blindspot, it simply won’t be seen.

This is true of objects as big as 16 full moons: potentially very bad news if it’s a motorcycle or a pedestrian on a crossing.

Today’s invention is a pair of contact lenses which contain only a small refractive region aligned with the blindspot in each eye. This forms a tiny diverging lens which bends light, which would fall into the blind region, outwards onto the light receptors at its edge.

The brain is good at joining up such signals without creating any perceptual gap (on closing one eye, you aren’t aware of a blank space in your other eye’s visual field). This would prevent all but the tiniest objects disappearing and enhance safety in numerous contexts… from driving to sports to piloting aircraft.

I have alow opinion of conventional wire staples…they usually fail to penetrate the massive volume of paper I confront them with and then they tend to empale one’s fingers when trying to separate the paperwork later.

It seems that $10 or so buys you an alternative these days…a way to join paper by punching a tag (of paper) through several other sheets. The trouble is that this really only works for a very small number of pages.

Today’s invention is a way to join arbitrarily large numbers of sheets of paper but without the need for wires. It is based on an electrically driven desktop drill. As shown in the diagram, on the left, the pile of papers to be stapled is loosely bent around a bisector of one corner and slightly separated into two roughly equal sections. The hole cutting drill operates once, at the location indicated by the “+” to create one set of sheets with a tang in the corner and another set containing a hole.

As indicated in the right hand part of the diagram, the tang can be inserted in the hole, joining both sets of paper. Several drilling operations in one corner could be used to create tangs at opposite angles for a more robust joint.

People can find themselves suddenly without a roof over their heads because of eg war or some natural disaster. Maybe the following automated building tool would help.

A small, autonomous robotic truck would be capable of moving only in circular arcs (of fixed length). Placed on a field, it moves backwards, along a circular arc and scoops up some earth. It then moves forwards and, injecting small quantities of water, it exudes a stream of mud paste along the arc. This backwards and forwards motion continues forming a spiral which overlaps itself (with gradual decrease in arc radius) until a hemispherical ‘igloo’ has been constructed -a little like a wasp’s nest).

For people who may be too weak to build their own shelter, this ultra-simple machine would be able to deliver a large number of rudimentary dwellings, working 24 hours per day.

If you required some extra headroom, the truck could, at some point, cut through the wall of the hut and excavate earth in circular arcs from the floor inside.

Since writing this, I have come across this recent development.

I’ve been sifting through some crazy patents lately. It’s hard to believe quite how many have been granted in connection with the humble keyboard.

There are keyboards with keys whose size corresponds to their frequency of use, inflatable and self-illuminating keyboards, radio-controlled ones and even some made of chocolate etc, etc.

I’ve noticed that those of us who type a lot, and are wary of carpal tunnel syndrome, tend to have their keys arranged in a well-defined ergonomic ‘mound’. People who do most of their work on a laptop are not so well catered to, however.

Today’s invention is an ergonomic keyboard for laptops, consisting of keys the individual height of which can be set. This would allow you to experiment with having eg the most frequently used keys standing up more than those less used ones. More practically, it would allow the formation of an ergonomic mound arrangement.

On opening the laptop, each key would be driven, by a small spring, to the comfortable working height determined for it by the user.

Once the work was complete, the screen would simply push the mound flat, as the laptop was closed up in the usual way.