Abstract: An automated stock exchange in which a computer matches buy and sell orders for a plurality of stocks. An open board simultaneous trading environment is simulated through two stages. The first stage is an order accumulation period which is continuously in operation except for one stock in the second stage. The second stage is an extremely rapid sequential call through. All orders for a given stock are available to customers during the first stage. During the second stage market orders are matched with market orders, then market orders are traded against limit orders as the trading price changes within controlled ranges. The system will also process stop orders, and other specialized transactions.

Abstract: A petroleum combustion device for heating rooms or the like comprising a primary combustion chamber, a secondary combustion chamber disposed on the primary combustion chamber and provided at that portion of its base plate which is outside an outer cylinder of the primary combustion chamber with an air path and a flame extension device arranged in the secondary combustion chamber and communicated with the upper portion of an inner flame cylinder of the primary combustion chamber.

Abstract: Structure for securing a band to a watch case which has a pair of legs and a cover between the legs at a band-connected side thereof. A connecting member having an L-shaped cross section is secured to an end of the band. A threaded hole is provided in each leg and a screw having a taper end is screwed in the threaded hole. The taper end is engaged with the connecting member, so that the connecting member is pressed against the side wall of the watch case.