Abstract: In a printed circuit board having land parts provided for connecting electric circuit forming elements and conductors interconnecting the elements. The conductors interconnect the land parts without the use of intercrossed connection wires over the conductors between the land parts.

Abstract: A flash device of the type in which the flash tube is coated with a trigger electrode and is positioned in contact with the back metal constituting part of the reflector so that when the trigger signal is applied directly to the back metal, the flash tube is triggered. In this type of flash device the back metal constituting part of the reflector is configured to a round shape. Because of the necessity of insuring good light distribution it is generally made of bright alloy aluminum. This not only makes it difficult to finely adjust the position of the flash tube relative to the back metal and electrically connect the trigger wire lead with the back metal, but also gives rise to a problem of electrically insulating the back metal from the other metallic parts since a very high voltage for triggering is applied to the back metal.

Abstract: In an automatically focusing camera, the lens is driven to infinity during film winding and the film winding spool is blocked when film winding is completed. Upon shutter release actuation of the camera, film winding is unblocked when the automatic focusing circuit energizes a first magnet and lens rotation is blocked at the focused position when the automatic focusing circuit energizes a second magnet. A single control member operates to effect blocking of the film winding mechanism and to drive the lens to infinity when rotated in one direction, and to unblock the film winding mechanism when rotated in the opposite direction.