Abstract: A releasable buckle is provided having a male member and female member. The male member includes a base having first and second sides, an end surface therebetween, at least one resilient spring arm extending from the end surface and at least one portion adjacent the first side extending from the base. The female member includes a top and bottom wall and a channel disposed therebetween and an opening exposing the cavity for receiving the male member. The female member further includes means complimentary in shape and position to the portion for receiving the portion. The portion extending from the male member and the means for receiving the male member together constitute an interlocking key system which functions to distribute the stress from the loads to the top and bottom walls of the female member.

Abstract: A pentagonal mirror unit of a single lens reflex camera including a hollow pentagonal mirror, a mirror sheet which is secured to a camera body and which has a recess in which the pentagonal mirror is fitted, a plurality of positioning projections which project downwardly from the lower end of the hollow pentagonal mirror, and a plurality of positioning holes provided on the bottom of the mirror sheet recess, so that the positioning projections can be fitted in the corresponding positioning holes.

Abstract: Disclosed is a water-soluble extract obtained from Pittosporaceae and effective for the treatment for diabetes and liver dysfunctions, which exhibits the following characteristic absorption in the infrared region of the spectrum: strong absorption bands at 1050-1070 cm.sup.-1, 1620 cm.sup.-1, 2950 cm.sup.-1, and 3450 cm.sup.-1, and relatively strong absorption bands at 520 cm.sup.-1, 780 cm.sup.-1, 1250 cm.sup.-1, 1320 cm.sup.-1, 1380-1440 cm.sup.-1 (doublet), 1735 cm.sup.-1 and 2850 cm.sup.-1.

Abstract: A system for controlling the ignition timing of an internal combustion engine comprises an anti-knock control device (7), which includes an evaluating circuit (8) and a control circuit (9). If rapid acceleration occurs the anti-knock control is automatically varied to provide a less pronounced effect than during steady-state operation. In one embodiment the knocking control is by-passed (arrow 12) or switched off, while another embodiment, parameters of the knocking control are varied and made less sensitive, i.e. towards greater knock frequency, whereby the knocking control has a less active effect.