BrianR - Thanks
I'll forward the link to my friend. Looks good.
He does pot the switches. In his mail to me he said, "Sometimes there’s no control devices that are available, so I had to make them myself. A mercury switch encased in an aluminum tube, sealed with hot glue or epoxy is a...
My friend's daughter has cerebral palsy, is a quadriplegic, and non-verbal. He is also a single parent. Because there was little on the market in the way of equipment that fit her needs and because "experts" wanted around $200/hr, he saw a need for simple, low-cost equipment for her...
In reply to dydt....
I just got an email from a friend who is working with disabled children making "toys" that aid in their making more use of their limbs. For instance, he writes, "By using several mercury switches, you can vary how high the child’s arm must arc before the toy...
Try Atlantic Fasteners - 1-800-800-BOLT (2658). Just checked their inventory and they don't have any in stock, but they might be able to tell you where to find them. Their website is - http://www.atlanticfasteners.com/