On Tuesday 24 May 2011 at 07:55:32 (GMT+2) Felix Miata
On 2011/05/23 23:39 (GMT+0300) Stan Goodman composed:
One can view it as a design problem. The failure
happened as it did
because the photosensors are below the ball, so that gravity drives
errant crumbs to cover them. If the sesors were _above_ the
ball.... O, wait a minute.... I have to think this out.
I've bought several Kensington products over the past couple of
decades or so. My newest one has a big hole at the lowest point,
ostensibly to pass junk through and out of harms way, but its
optical sensor is in a recess that looks like it's designed to
capture as much junk as possible on its way down to the hole.
Kensington products strike me as having been designed by direct
descendants of the engineers of Lucas Electric during the '50's and
'60's, the people responsible for the infamous failure-prone
electrical systems of British cars of that period.
Yes, I had an Austin 1100 back then, first car after I immigrated.
OTOH, my Logitech trackballs all have holes at the
which most crumbs and other detritus fall out of harm's way. Their
optical sensors are located closer to laterally than to the bottoms,
and flush, so that there's nothing to catch junk on its way down to
I am, on the other hand, a staunch defender of Kensington trackballs
(despite the Kensington support "tech" who told me I could use the
bundled software if I would run OS/2 under Windows). They were hard to
clean, but they were very sturdy: I gave one at least 6 or 7 years old
to a disabled friend because he had trouble manipulating a mouse. I am
very happy with this (now de-crumbed) optical Kensington.
On the other hand, I have had bad luck with Logitech marbles.
It's a shame there aren't more trackball
designs to choose from. It
seems there's at least 100 mouse designs for each trackball design,
and most stores don't carry more than one or two at the most. The
best trackballs (Logitech Marble FX), like the best keyboards
(Northgate OmniKey 102), were last produced more than a decade ago,
and cost more now on eBay than they did when new, if any can be
found there at all.
I have two of the very expensive OmniKey 102, which were very nice until
they after mere months. I have since been buying cheap keyboards, which
have invariably lasted much longer and are not a big loss when they go.
Much like the indestructable Ingersoll dollar watches of the 30s and 40s
-- the only watches of the era that you could wear when swimming and
that still worked. I'm sure there is a lesson in this.
If I thought for a minute that I could fob the OmniKeys off on ebay...
To unsubscribe, e-mail: opensuse+unsubscribe(a)opensuse.org
For additional commands, e-mail: opensuse+help(a)opensuse.org