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A shoulder belt clip for restraining a child in a child safety seats or carrier. In a preferred embodiment, the shoulder belt clip is comprised of a plate made of flexible material and with two horizontal slots arranged in parallel on one side and a U-shaped opening on the other. The two straight sl

A shoulder belt clip for restraining a child in a child safety seats or carrier. In a preferred embodiment, the shoulder belt clip is comprised of a plate made of flexible material and with two horizontal slots arranged in parallel on one side and a U-shaped opening on the other. The two straight slots maintain attachment to, but allow the clip to slide vertically on, the webbing that runs over the left shoulder of the child. The U-shaped opening forms a tab that admits entry of the webbing that runs over the right shoulder of the child and holds it until release is desired by the parent. A narrowing of the U-shaped opening causes compression of the webbing between the tab and the opening and thereby prevents slippage of the clip vertically on the webbing that runs over the left shoulder of the child. A lock comprised of a spring-loaded slider is fixed between and parallel to the two straight slots blocks the out-of-plane motion of the tab in the direction that would release the webbing, and also by its positioning prevents sliding the webbing laterally out the open end of the U-shaped opening. When release is desired by the parent, the lock slider is pushed back against the force of the spring and the flexible tab is pushed out-of-plane with respect to the body of the clip. This allows quick release of the webbing that runs over the right shoulder of the child.

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What is claimed is: 1. A harness clip for a child safety seat or child carrier harness, said harness comprising a first belt that holds one shoulder of the child in the child safety seat or child carrier and a second belt that holds the other shoulder of the child in the child safety seat or child

What is claimed is: 1. A harness clip for a child safety seat or child carrier harness, said harness comprising a first belt that holds one shoulder of the child in the child safety seat or child carrier and a second belt that holds the other shoulder of the child in the child safety seat or child carrier when said child safety seat or child carrier is in use, said harness clip comprising: a plate comprising a first portion and a second portion and having two straight slots on said first portion and a U-shaped slot on said second portion, said U-shaped slot forming a tab that is normally disposed in substantially the same plane as said plate, the first belt being threadable through said two straight slots and the second belt being threadable through said U-shaped slot; and a slider slidably attached to said plate that is adapted for preventing said tab from moving out of the plane of said plate when said slider is in the engaged or locked position, thereby preventing the movement of the second belt through or out of said U-shaped slot. 2. The harness clip of claim 1 wherein said slider is housed in a housing that is disposed between said two substantially parallel straight slots, said housing containing a spring that urges said slider to slide into a locked position. 3. The harness clip of claim 2 wherein said spring is selected from the group consisting of: a compression-type spring; and an extension-type spring. 4. The harness clip of claim 2 further comprising: a prong that is attached to said slider and that provides a user with a means for sliding said slider relative to said housing into a disengaged or unlocked position. 5. The harness clip of claim 1 wherein said slider comprises a male end and said tab has a female end into which said male end engages when said slider is in the engaged or locked position. 6. A clip for a child safety seat child carrier harness, said harness comprising a first belt that holds one shoulder of the child in the child safety seat or child carrier and a second belt that holds the other shoulder of the child in the child safety seat or child carrier, said clip comprising: a plate comprising a first portion and a second portion and having means for passing a belt through said plate that is disposed on said first portion and means for releasably passing another belt through said plate that is disposed on said second portion, said means for releasably passing another belt through said plate comprising a tab that is normally disposed in substantially the same plane as said plate, said first belt being threadable through said means for passing a belt through said plate and said other belt being threadable through said means for releasably passing another belt through said plate; and a slider slidably attached to said plate that prevents said tab from moving out of the plane of said plate when said slider is in the engaged or locked position, thereby preventing the movement of said second belt through or out of said means for releasably passing another belt through said plate. 7. The harness clip of claim 6 wherein said plate is an undivided plate and said means for releasably passing another belt through said undivided plate has a first slot portion and a second slot portion and a third slot portion that is substantially perpendicular to said first and second slot portions. 8. The clip of claim 6 wherein said slider is housed in a housing that is mounted on said first portion, said housing containing a spring that urges said slider into an engaged or locked position. 9. The clip of claim 6 further comprising: a prong that is attached to said slider and that provides a user with a means for moving said slider into a disengaged or unlocked position. 10. The clip of claim 6 wherein said slider comprises first connection means and said tab comprises second connection means with which said first connection means engages when said slider is in said engaged or locked position. 11. A harness clip for a child safety seat or child carrier harness, said harness comprising a first belt that holds one shoulder of the child in the child safety seat or child carrier and a second belt that holds the other shoulder of the child in the child safety seat or child carrier, said clip comprising: a single unitary one-piece plate comprising a first portion and a second portion; means for slidably passing the first belt through said single unitary one-piece plate, said means for slidably passing the first belt through said single unitary one-piece plate being attached to said first portion and slidably connecting the first belt to said single unitary one-piece plate; means for releasably passing the second belt through said single unitary one-piece plate, said means for releasably passing the second belt through said single unitary one-piece plate being attachable to said second portion and releasably connecting the second belt to said single unitary one-piece plate, said means for releasably passing the second belt through said plate comprising a slider and a spring that urges said slider toward a position that prevents the release of the second belt from said single unitary one-piece plate. 12. The clip of claim 11 wherein said means for passing the second belt through said single unitary one-piece plate comprises means for preventing said means for passing the second belt through said single unitary one-piece plate from moving relative to said single unitary one-piece plate when said slider is in said position that prevents the release of the second belt from said plate. 13. The clip of claim 11 wherein said slider comprises first connection means and said means for passing the second belt through said single unitary one-piece plate comprises second connection means with which said first connection means engages when said slider is in said position that prevents the release of said second belt from said single unitary one-piece plate. 14. A child safety seat comprising: a seat portion having a seat support and back support; a harness portion comprising a first belt that holds one shoulder of the child in the seat and a second belt that holds the other shoulder of the child in the seat when said child safety seat is in use; and the harness clip of claim 1. 15. A vehicle comprising: an automobile; the child safety seat of claim 14; wherein the child safety seat is built into the automobile. 16. A child carrier comprising: a seat portion having a seat support and back support; a harness portion comprising a first belt that holds one shoulder of the child in the seat and a second belt that holds the other shoulder of the child in the seat when said child carrier is in use; and the harness clip of claim 1. 17. A method for securing a child in a child safety seat, said method comprising: placing the child in the child safety seat; placing a left shoulder belt that is secured to the child safety seat over the left shoulder of the child; placing a right shoulder belt that is secured to the child safety seat over the right shoulder of the child; buckling a first portion of a buckle to which said left shoulder belt and a left lap belt extending over the left leg of the child are secured and buckling a second portion of a buckle to which said right shoulder belt and a right belt extending over the right leg of the child are secured to a third portion of said buckle to which a crotch belt is secured; adjusting a harness clip mounted on said left shoulder belt to about the chest level of the child, said harness clip comprising an undivided plate having a single U-shaped slot therein and comprising a slider that is biased in a locked position by a compression-type spring or an extension-type spring; retracting said slider and threading the right shoulder belt into the U-shaped slot with the right shoulder belt entering the top of said U-shaped slot from the back of the harness clip and entering the bottom of said U-shaped slot from the front of said U-shaped slot; and releasing said slider so that it moves to said locked position that prevents said right shoulder belt from being released from said U-shaped slot and from sliding in said U-shaped slot. 18. A method for securing a child in a child safety seat, said method comprising: placing the child in the child safety seat; placing a left shoulder belt that is secured to the child safety seat over the left shoulder of the child; placing a right shoulder belt that is secured to the child safety seat over the right shoulder of the child; adjusting a harness clip mounted on one of said shoulder belts, said harness clip having a U-shaped slot and comprising a slider that is biased in a locked position by a compression-type spring or an extension-type spring; retracting said slider and threading the other of said shoulder belts into the U-shaped slot with the other of said shoulder belts entering the top of said U-shaped slot from the back of the harness chip and entering the bottom of said U-shaped slot from the front of said U-shaped slot; and releasing said slider so that it moves to said locked position that prevents the other of said shoulder belts from being released from said U-shaped slot and from sliding in said U-shaped slot. 19. A method for securing a child in a child safety seat, said method comprising: placing a left shoulder belt that is secured to the child safety seat over the left shoulder of the child; placing a right shoulder belt that is secured to the child safety seat over the right shoulder of the child; adjusting a harness clip mounted on one of said shoulder belts, said harness clip having a U-shaped slot and comprising a slider that is biased toward a locked position by a compression-type spring or an extension-type spring; retracting said slider and placing the other of said shoulder belts into said U-shaped slot; and releasing said slider so that it moves to said locked position that prevents the other of said shoulder belts from being released from said U-shaped slot. 20. The harness clip of claim 1 wherein said plate is an undivided plate and said U-shaped slot has a first slot portion and a second slot portion that are substantially parallel and a third slot portion that is substantially perpendicular to said first and second slot portions. 21. A harness clip for a child safety seat or child carrier harness, said harness clip comprising: a plate comprising a first portion and a second portion and having two straight slots on said first portion and a U-shaped slot on said second portion, said U-shaped slot forming a tab that is normally disposed in substantially the same plane as said plate, said two straight slots accommodating a first belt that holds one shoulder of the child in the child safety sear or child carrier when said child safety seat or child carrier is in use and said U-shaped slot accommodating a second belt that holds the other shoulder of the child in the child safety seat or child carrier when said child safety seat or child carrier is in use; and a slider slidably attached to said plate that prevents said tab from moving out of the plane of said plate when said slider is in the engaged or locked position, thereby preventing the movement of the second belt through or out of said U-shaped slot; wherein said slider is housed in a housing that is disposed between said two substantially parallel straight slots, said housing containing a spring that urges said slider to slide into a locked position; and wherein said spring is selected from the group consisting of: a compression-type spring; and an extension-type spring.