Abstract: An intaglio printing ink, curing by free radical acrylate chemistry, which does not fluoresce in at least the visible region under ultraviolet light is prepared by using an acylphosphine oxide as the photoinitiator.

Abstract: An adjustable back system for releasable attachment to spaced-apart substantially vertical wheelchair frame posts (52). The back system includes a relatively rigid shell back (36) formed to extend transversely between the posts (52) for support of a user's back, a plurality of post-engaging assemblies (50) coupled to shell back (36) by a plurality of independently adjustable coupling assemblies. The post-engaging assemblies (50) including an upper pair of post-engaging assemblies extending transversely from opposite sides of shell back (36) and a lower pair post-engaging assemblies extending transversely from opposite sides of shell back (36) below upper post-engaging assemblies.

Abstract: A seat frame for mounting on a chair frame for supporting a seat pad and seat back. The frame is formed by a pair of spaced apart side rails, each rail having a plurality of spaced apart parallel transverse mounting beams extending therefrom towards the opposite rail. A central beam is telescopingly and releasably engaged between each corresponding mounting beam on the rails. Chair frame mounting fittings and seat back mounting fittings are releasably secured to the side rails.

Abstract: A detent for releasably securing an inner telescoping tube within an outer telescoping tube. The said tubes having alignable openings in the walls thereof for receiving the detent. The detent is formed by a detent pin which extends through the tube wall openings and releasably latches the tubes together. A leaf spring secured at the inserted end of said inserted tube extends within the outer tube into supporting and biasing engagement with the detent pin. The spring biases said pin into the latching position. For releasing the detent, a bell crank is pivotally mounted within the inserted tube. One end of the bell crank is engaged with the locking pin and biasing spring and the other end is secured to an actuating knob which extends through the wall of the inserted tube.

Abstract: A wheelchair back system adapted to provide a customized fit to the user. The system includes a rigid back shell removably affixed to the wheelchair, a plurality of foam blocks, and a pad member containing flowable fluid material. The back shell has a forward facing, front surface and the foam blocks are removably positionable forward of the back shell to form a substantially continuous layer of foam of substantially uniform depth forward of the back shell. Each foam block is individually and separately removable to provide a recessed area in the otherwise continuous layer of foam to provide a customized fit to the user. The pad member overlies the front surface of the foam blocks and is received in any recessed area formed by the removal of a foam block. In this manner, the system can be customized to the deformities or other abnormalities of each individual user.

Abstract: A coupling assembly for connecting adjacent ends of conduits, primarily used for aircraft fuel lines having redundant locking features is provided. This coupling can be manipulated with one hand and includes laterally spaced locking tines which engage raised elements for locking the coupling in secured relationship. The coupling assembly can be manipulated with one hand and has viewing ports to be sure that all parts are in place. Also, the tines and guide members are configured to create a force between the two with a longitudinal component tending to open the assembly.

Abstract: A coupling assembly for connecting adjacent ends of conduits, primarily used for aircraft fuel lines having redundant locking features is provided. This coupling can be manipulated with one hand and includes a central tine and laterally spaced locking tines which engage a mating channel for locking the coupling in secured relationship. Indicia is provided across the locking tines which is not visible when the coupling assembly is completely and securely closed. The coupling assembly can be manipulated with one hand and has viewing ports to be sure that all parts are in place. Also, the tines and guide members are configured to create a force between the two with a longitudinal component tending to open the assembly.