INERTIA SAFETY BELTS
First Claim
1. An inertia safety belt mechanism comprising a generally vertically oriented guideway, a slider slidable up and down the guideway, a belt connected to the slider and extending upwardly therefrom, a member movable down the guideway with said slider under gravity, and a parallel motion linkage linking the slider and the said member, the linkage being responsive to an upward jerk of said slider to cause relative separation, transverse the guideway, of the slider and the said member and thereby to cause the assembly of slider and member to jam in position along the guideway;
- wherein the slider and member are coupled by spring means resisting the said relative movement and are arranged inside the guideway; and
in which the said linkage allows the slider and member to separate, the guideway limits the separation of the slider and member and the guideway and member have frictionally engageable surfaces.
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Accused Products
Abstract
One end of a safety belt is attached to a slider which can move vertically up and down a box-section guideway. In each of several cavities formed by opposed recesses in the slider and an adjacent bar is a diamond-shaped tooth. The slider and the bar are held together by a spring. When the slider is jerked upwards the parallel motion linkage formed by the teeth causes the assembly of slider and bar to separate and jam in the guideway.
12 Citations
3 Claims
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1. An inertia safety belt mechanism comprising a generally vertically oriented guideway, a slider slidable up and down the guideway, a belt connected to the slider and extending upwardly therefrom, a member movable down the guideway with said slider under gravity, and a parallel motion linkage linking the slider and the said member, the linkage being responsive to an upward jerk of said slider to cause relative separation, transverse the guideway, of the slider and the said member and thereby to cause the assembly of slider and member to jam in position along the guideway;
- wherein the slider and member are coupled by spring means resisting the said relative movement and are arranged inside the guideway; and
in which the said linkage allows the slider and member to separate, the guideway limits the separation of the slider and member and the guideway and member have frictionally engageable surfaces.
- wherein the slider and member are coupled by spring means resisting the said relative movement and are arranged inside the guideway; and
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2. A mechanism as claimed in claim 1 in which the slider and member include facing recesses forming enclosures in each of which a tooth extends from a lower notch in the respective recess formed in the slider to an upper notch formed in the respective recess formed in the member.
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3. A mechanism as claimed in claim 1 wherein the slider extends through a slot in the guideway to a clasp For the attachment of the said belt.
Specification
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- Resources
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Current AssigneeMinden Vaughan Blake
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Original AssigneeMinden Vaughan Blake
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InventorsBlake, Minden Vaughan
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Primary Examiner(s)McCall, James T.
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Application NumberUS05/057,110Time in Patent Office601 DaysField of Search297/388,389,385 280/15SB 244/122.2,122 188/134US Class Current297/479CPC Class CodesB60R 22/3405 of the non-rotary type
