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Reward Candy Dispenser for Personal Computers
A personal computer peripheral, battery powered reward candy dispenser which immediately presents students with a single candy for each problem completed correctly.
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| Number | Title | Issue Date |
| 7401625 | System for supplying liquefied gas to a combustion engine with a minimum liquefied-gas level detector To detect the volume of gas remaining in a gas bottle or a fixed tank of a system for supplying liquefied gas as fuel for a combustion engine, a positive temperature coefficient (or PTC) probe (16) is placed in the gas feed line (12) between the gas so... | 07/22/2008 |
| 7182099 | Tap for gas or liquid cylinder A tap for a gas or liquid cylinder is provided that comprises an inverted seat primary valve located in a main portion of a tap body and a secondary check valve spring biased into closed position and located below the lower end of a threaded section of a root end po... | 02/27/2007 |
| 6742763 | Linear spring-loaded actuator for a valve A linear spring-loaded actuator (10) for a valve (12) comprises a housing (14) and an actuating spindle (16) slidably supported in the housing (14). A cap (22) is associated with the housing (14). Spring means (36 | 06/01/2004 |
| 6367500 | Safety valve for a compressed-gas tank A safety valve for a compressed gas tank in which the plug is made of meltable material and intended to melt at a pre-determined temperature in order to release the compressed gas from the tank. The safety valve is essentially characterized in that the me... | 04/09/2002 |
| 6131877 | Automatic shut-off device for a valve for compressed or liquefied gases The shut-off device is intended for refillable gas cylinders. In order to be sure that only authorized persons can refill the cylinder, the filling device comprises a non-return valve element (16) which prevents filling and which can only be neutralized u... | 10/17/2000 |
| 6014984 | Valve The valve comprises an operating wheel connected by a connecting rod to an opening and closing member. The valve is sealed by a stuffening box fixed into the upper part of the body around the rod. The stuffening box has a polygonal head so that it can be ... | 01/18/2000 |
| 5971356 | Electromagnetically actuable valve The valve according to the invention in intended, in particular, for high-pressure gas containers containing up to 300 bar. It comprises a shut-off element which is hold on its valve seat under the action of a compression spring and of the gas pressure. I... | 10/26/1999 |
| 5947444 | Gas tap The tap comprises an external operating element and a connecting stem for transmitting the movement of the operating element to the opening and closure member which is arranged in such a way as to be pressed against the sealing seat under the effect of th... | 09/07/1999 |
| 5485872 | Device for closing a non-refillable bottle, and adaptors for filling and draining through such a device The closure of the bottle is achieved with the aid of a cylindrical ring (20), the base of which is closed by a membrane (22). This ring (20) is put in place together with a filling adaptor which is screwed onto the neck of the bottle and which allows the... | 01/23/1996 |
| 5454421 | Device for filling and emptying a gas bottle The device is designed for a valve with or without a residual-pressure valve element and is intended to fill the bottle and to create a vacuum therein, optionally through the residual-pressure valve element. It includes a rotary axial shaft (56) with an eccent... | 10/03/1995 |
| 5232019 | Faucet for bottles of compressed or liquefied gas The faucet comprises a closure member (64) between a gas-outlet passage (60) and an intake passage (62), an outer operator connected to the closure member (64) in order to displace the latter between an open position and a closed position, and a pressure ... | 08/03/1993 |
