Abstract: When an electromagnet (2) is employed to lift and turn a slab of steel, there is a risk that the slab is dropped, causing undesirable noise. Also, with a flat contact surface of the electromagnet, there is jerking of the apparatus. Improvement in both respects is achieved by the use of a singly curved convex contact surface (7) of the electromagnet, which provides line contact with the slab at all times, avoiding transitions from line contact to face contact.

Abstract: A hot water boiler, e.g. for central heating, has two castings which contain water passages and are connected together to enclose a combustion chamber and above it a flue. From the flue, the burned gases pass downwardly through passages outside the castings into which ribs on the castings project. In order to improve thermal efficiency by achieving considerable condensation of water vapor on the burned gases, the castings are located on a sump into which the downward passages for burned gas open and which has means for removing condensate collecting in it. A blower is provided to extract the burned gas from the sump.

Abstract: This invention discloses a kit for assembling light, airy, toy-like designs from blocks and solid sticks made of the same material throughout. The blocks preferably have tapered holes adapted to receive the sticks' ends therein. The holes and the sticks are adapted to compressively engage with one another upon insertion of selected ends of the sticks in the holes, thereby providing a secure grip by each hole's wall upon the end of the associated stick, locking it into the hole.