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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 |
| 7303215 | Mortise locking device A lock assembly includes a single switch actuated by a cam for monitoring the position of a main bolt and an auxiliary bolt. The main bolt and the auxiliary bolt engage and move the cam between an actuated position and a released position. In the actuated position t... | 12/04/2007 |
| 7226094 | Door latch extension A door latch extension is attachable to a doorjamb for maintaining a door in an ajar position. The door latch extension includes a support member, an extension member, and a cover. The support member is mountable to the door jamb by a striker plate portion. The exte... | 06/05/2007 |
| 7107800 | Door bolt A door bolt is constructed to include a jam plate fixedly fastened to a doorjamb, and a doorplate assembly installed in the free end of a door panel and adapted to secure the free end of the door panel to the jamb plate, the doorplate assembly having a lock cylinder... | 09/19/2006 |
| 7100405 | Latching devices for gates and doors A latching device (1) particularly for installation such as swimming pool gates may have an automatic magnetic latch with a child resistant device to control access. The child resistant device may include an operating handle (10) at an elevated locatio... | 09/05/2006 |
| 7097219 | Encapsulated striker assembly A striker assembly for latch engagement has a striker piece and a striker mount which encapsulates a portion of the striker piece to secure and mount the striker piece on a structure for engagement with a latch. In one embodiment, the striker mount is formed by a pa... | 08/29/2006 |
| 7021683 | Slidable door lock brace A standard door lock is connected through a bore in a door to a lock brace mechanism mounted on a fixed vertical plate on an inside surface of the door. A slide bar moves within a vertical slot in the fixed plate. Gearing within the brace mechanism turns a threaded ... | 04/04/2006 |
| 7000440 | Rotary security system A plurality of separately keyed padlocks, ranging in number from 7 to 150 or more, are securely held within a circular assembly that is rotated for selection of a specific padlock. This assembly of locks can be placed at a level for easy reach from a car window. Vis... | 02/21/2006 |
| 6993944 | Dead bolt lock A dead bolt lock having a slot or slots for insertion on a dead bolt and legs for spanning the underlying door knob of a door to secure the dead bolt. In an adjustable embodiment the dead bolt lock includes a lock housing having a circular rim and downwardly-extendi... | 02/07/2006 |
| 6920987 | Tiltable knife holder A knife holder is disclosed. The knife holder includes a housing and a block portion for holding one or more knives. The block portion is pivotally attached to the housing such that the block portion may be moved between an upright position in which the block portio... | 07/26/2005 |
| 6868702 | Door locking assembly A door locking assembly includes a locking arm mount that is fixedly attached to a first side of a doorframe. An arm has a first end and a second end. The first end is pivotally coupled to the locking arm mount such that the arm is selectively positionable between a... | 03/22/2005 |
| 6520551 | Open door security device A security device for use in securely fixing the entry path of an enclosure in a predetermined semi-open position includes a first member removably mountable to a structure associated with the entry path to an enclosure and a second member removably mount... | 02/18/2003 |
| 6332344 | Deadbolt security chain A security device which is mounted on a door adjacent a deadbolt lock. The security device is a chain which will have a link with a ring at one end which is passed around the knob on the deadbolt to prevent the deadbolt knob from being turned and, therefo... | 12/25/2001 |
| 6227019 | Dual key port accessible intelligent gate lock A stand alone, electronic gate lock is integrally mountable with a barrier, such as a perimeter fence of an airport. The gate lock is configured to be locked and unlocked by an electronic key from key access ports on each of interior and exterior sides of... | 05/08/2001 |
| 6145351 | Perimeter security system with improved Z-bar lock for maximum degree of mechanical and electronic protection A Z-bar security system, one which is provided with a key and a secured latch, is combined with an electronic alarm and monitoring system. This combination provides the maximum degree of both mechanical and electronic security. In a preferred embodiment, ... | 11/14/2000 |
| 5983680 | Door locking device A security lock is described which permits a door to be opened by a predetermined amount while maintaining security against forced entry. Preferably, the security lock also functions as a deadbolt lock and comprises a slotted floor plate covering an apert... | 11/16/1999 |
| 5899509 | Door security device having viewing position A triple articulating security device for use with a door, such as a house door having a hinged side and a latch (opening) side device holds a door in a closed (security) position or in a partially open (viewing) position. The security device generally co... | 05/04/1999 |
| 5896763 | Locking device with a leaf-restraining device A locking device for a door, or the like, with a fixed frame and a leaf includes a main lock and a leaf-restraining device on the leaf, with a driving pin of the leaf-restraining device being engageable with a gap limiter installed on the fixed frame. The... | 04/27/1999 |
| 5875660 | Anti-snooping device for apartment dwellers An anti-snooping device for doors to apartments comprising a locking mechanism and a relatively low-strength, "tamperproof" seal capable of engaging the locking mechanism, the locking mechanism being capable of disengagement without, however, compromising... | 03/02/1999 |
| 5771720 | Z-bar security system with key and secured latch A system for locking a door can: (1) lock the door in dead bolt fashion in three modes, (2) allow the door to open a limited distance, or (3) allow the door to open freely. The system has a door-mounted latch assembly that includes a base plate, an interm... | 06/30/1998 |
| 5669256 | Door lock mechanism with a release button A door lock mechanism includes a retainer housing mounted to a doorframe and a chain housing mounted to a door plate. The retainer housing includes a retaining slot defined in a lateral side thereof and a lock core mounted therein. A lock piece is pivotal... | 09/23/1997 |
| 5647233 | Door locking mechanism A door locking device includes a housing having a lateral hole and a stop rotatably engaged in the lateral hole. A chain has one end secured to a door panel and has a head secured to the other end for engaging in the slot. A latch is extendible inward of ... | 07/15/1997 |
| 5524943 | Security device The invention relates to a security device for doors or windows for foiling unwanted entry into a secured facility comprising a limited rotational vertical rod having a plurality of parallel horizontal rods extending from said vertical rod. The parallel h... | 06/11/1996 |
| 5421074 | Pick proof deadbolt conversion kit A conversion kit allows a user to convert a deadbolt lock mechanism into a pick proof deadbolt lock mechanism by providing all the necessary parts allowing a user to easily and effectively prevent the turnpiece latch of the deadbolt lock mechanism from ro... | 06/06/1995 |
| 5327632 | Pick proof deadbolt conversion kit A conversion kit allows a user to convert a conventional deadbolt lock mechanism into a pick proof deadbolt lock mechanism by providing all the necessary parts allowing a user to easily and effectively prevent the turnpiece latch of the deadbolt lock mech... | 07/12/1994 |
| 5285666 | Combined dead lock and safety chain type door lock A door locking mechanism of the chain guard type which can be used as a dead lock and in a manner similar to currently popular regular safety chain type door locks. The mechanism comprises a bolt keeper formed with at least one elongated slot terminating ... | 02/15/1994 |
| 5173991 | Door check having a link coated with moldable materials A checking mechanism for a closure member and a frame, the closure member moveable in relation to the frame, the checking mechanism comprising a housing affixed to the closure member or the frame and having an opening therewith; a link member having a cor... | 12/29/1992 |
| 5016453 | Timed refrigerator lock A timer controlled lock operating device for a refrigerator or the like is provided and consists of a plate affixed to the side wall of the refrigerator, a link chain having one end secured to the plate, a housing affixed to the front door of the refriger... | 05/21/1991 |
| 4900075 | Auxiliary safety chain locking device An auxiliary safety chain device for securing stud/loop retainer safety latching type devices is disclosed. The device includes a stud securement member secured to the stud of the safety latch device. A coupling member is coupled with the loop retainer. A... | 02/13/1990 |
| 4876864 | Combination lock A combination lock for a panel and a frame is provided. The panel and the frame are such that the panel can move relative to the frame and the combination lock is such that it can lock the panel relative to the frame. The panel has an arm member extending... | 10/31/1989 |
| 4828603 | Herbicidal oxatricyclo-nonane ethers The present invention relates to novel tricyclo ether derivative compounds, to compositions containing these ether derivative compounds, and to methods of using these compounds or compositions to control the growth of undesired vegetation.... | 05/09/1989 |
| 4815305 | Auxiliary safety chain lock A portable lock mechanism to secure safety chain latch devices is disclosed. The lock device includes a locking mechanism having a member coupled therewith which is adapted to be coupled with a safety chain latch slide plate. Also, a mechanism to retain t... | 03/28/1989 |
| 4639024 | Simultaneously operated dead bolt lock and security chain A dead bolt lock houses both a dead bolt and a security chain assembly. Externally accessible drive linkages cause the simultaneous ejection of the dead bolt and a portion of the security chain assembly whereby the dead bolt is engaged with a strike plate... | 01/27/1987 |
| 4609910 | Exit door security system The system automatically warns when opening of an exit door is attempted, causing an alarm to be made and preventing full opening for a predetermined period of time. Such a system includes an electromagnet, timer, alarm and activator switch connected in s... | 09/02/1986 |
| 4564230 | Restraint apparatus for cargo box doors Door-swing restraint apparatus for a pair of latched doors closing an end opening of a cargo box comprises a chain or cable link connected between margins of the doors so that a person actuating a bar to release door latches will not be injured by freight... | 01/14/1986 |
| 4558880 | Coupling member The present invention relates to a coupling member which comprises a first slotted member and a second key member, wherein the second key member is arranged to be inserted in to the slot of the first member and to be latched to the first member upon being... | 12/17/1985 |
| 4548060 | Locking device for vending machines Disclosed is a locking device which comprises a stationary member permanently mounted on a door structure together with a passive stationary block permanently mounted on adjacent wall structures which is connected to an interlocking member by means of an ... | 10/22/1985 |
| 4472143 | Method for securing doors, and the like This invention is a unique method and apparatus for securing doors, windows, and the like, from unwarranted entry so that limited opening of the door, or the like, can be accomplished. The invention further provides for the emergency release of the secure... | 09/18/1984 |
| 4348879 | Security device The security device of the present invention is mounted in the floor of a building adjacent the hinge side of a door to be made secure. The security device has elements which can be elevated from their storage position to engage against the inner face of ... | 09/14/1982 |
| 4318559 | Lock for sliding members An automatic lockable linkage system for use with sliding members, such as a sliding door or window, comprising a first and second telescoping arm member pivotally interconnected adjacent to their inner end portions. Each telescoping arm member also has a... | 03/09/1982 |
| 4261189 | Panelboard vent assembly A retainer plate is pivotally mounted on a panelboard cabinet door lock housing, which carries a latch for locking the door. A detent on the plate engages in a rabbet opening to enable limited opening movement of the door in response to the pressure devel... | 04/14/1981 |
