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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 |
| 6428257 | Lock nut A locking nut includes a threaded main bore for receiving a threaded portion and a number of oblique bores in each of which is positioned a locking pin having a forward end for engagement against the threaded portion. The oblique bore and the associated l... | 08/06/2002 |
| 5701628 | Mop holder with a quick release locking nut A mop holder which incorporates a quick release locking nut for clamping a mop and attaching a mop stick. The mop holder comprises a hollow frame and a quick release locking nut which is installed on the frame. The frame has a central portion with a close... | 12/30/1997 |
| 4923323 | Threaded type fastener A fastener for use where a predetermined holding force of holding position is to be maintained while the fastener is required to exert a holding force less than the full maximum force it is capable of exerting, the fastener having a shaft portion that thr... | 05/08/1990 |
| 4911594 | Push-nut type fastener A push-nut type fastener for use on a threaded stud comprises a thin planar metal plate having an aperture formed therethrough with its axis perpendicular to the plane of the plate. A first plurality of resilient fingers is formed integrally with the meta... | 03/27/1990 |
| 4784553 | Vibration resistant fastener construction A vibration-resistant attachment device involving a threaded stud having thread crests, and a sheet metal member having an aperture the edge of which constitute an element of an interrupted female screw thread through which element the threaded stud exten... | 11/15/1988 |
| 4692077 | Self-locking nut with rocking anti-reversing pin A self-locking nut has an annular body, an axial threaded bore, and a hexagonal exterior periphery. A small bore is drilled through the body parallel to the threaded bore adjacent to an apex of two peripheral flat surfaces. An L-shaped locking pin has a b... | 09/08/1987 |
| 4067371 | Mechanically locking fastener A mechanically locking fastener has external threads for installation in the threaded bore of a workpiece. A lock ring has internal radial serrations locked in serrations of the fastener proper, and external radial teeth of a form for gripping the wall of... | 01/10/1978 |
