Abstract: An internal combustion piston engine has one or more cylinders each having a main combustion chamber and an auxiliary combustion chamber connected by a torch nozzle. Exhaust gases from the main chamber are used to heat the intake mixture for the auxiliary combustion chamber. Contiguous thin wall pipes, one carrying hot exhaust gases and one carrying a rich mixture for the auxiliary chamber, are both enclosed within a thick wall outer housing. A riser for the auxiliary intake pipe is also enclosed within said housing. The thin wall exhaust pipes join an exhaust chamber secured to the thick wall housing at a central location to minimize deformations caused by thermal expansion.

Abstract: A receiver for disposable surgical implements, principally surgical needles, including a pair of foldably connected pads, each having a penetrable top lamination and a penetration resisting bottom lamination. The top lamination of one embodiment is provided with a coating which is essentially non-adhesive when exposed to receive surgical implements to permit placement and penetration therein of the top lamination only as well as subsequent removal; but which is co-adhesive with the coating on the other pad, when the two pads are folded into mutual pressure contact, thereby to secure surgical implements between the pads for disposal. In another embodiment, an adhesive coating is applied on one pad and is initially covered while the other pad is used to receive and removably retain surgical implements; the cover being removed and the adhesive coated pad pressed over the other pad and the surgical implements thereon to permit disposal.