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US 4,050,284 AGranted
Fastening member for anchoring a railway rail
AssigneePandrol Limited
InventorDavid William Miller
Life of this patent
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AssigneePandrol Limited
InventorDavid William Miller
Estimating the term…
A railway rail-fastening clip is made by bending a resilient rod at least 0.8 centimeter thick in a first bending operation to give it first to fifth portions in direct succession, proceeding from one end to the other, the first portion being a substantially straight leg, the second a reverse bend, the third being beside the first and the whole being such that in a particular position, with the first portion horizontal, in a plan view the third and fifth portions appear to be in opposite sides of the axis of the first portion. The whole of that part of the fifth portion which is between the lowest point in the fifth portion, when the bent rod is in said position, and the adjacent end of the rod is pressed in a second bending operation by a first shaping tool against a second shaping tool to make said end upturned. Preferably some of the fifth portion on the other side of said lowest point is also pressed by the first tool against the second, which is preferably formed with a recess into which the rod is pressed.
A method of making a railway rail-fastening clip comprising subjecting a rod of resilient metal at least 0.8 centimeter thick to a first bending operation which results in the rod having, proceeding from one end of the rod to the other end, a first portion which is a substantially straight leg, a second portion which is a reverse bend, a third portion which is beside the first portion, then a fourth portion and then a fifth portion, the bent rod being such that when it is placed in a particular orientation with the first portion horizontal and the rod is viewed from above the third and fifth portions appear to be on opposite sides of the axis of the first portion, and then subjecting the bent rod to a second bending operation which results in said other end of the rod being up-turned and which comprises causing a first shaping tool to force into contact with a second shaping tool the whole of that part of the length of the rod which, when the finished clip is in a particular position, in which the lowermost points on both ends of the first portion lie in a horizontal plane, the lowermost points on the third and fifth portions lie in another horizontal plane and the fourth portion crosses and lies above the axis of the first portion, is between the lowermost point on the fifth portion and said other end of the rod.
Apparatus for effecting a second bending operation on a rod of resilient metal at least 0.8 centimeter thick which in a first bending operation has been bent so that it has, proceeding from one end of the rod to the other end, a first portion which is a substantially straight leg, a second portion which is a reverse bend, a third portion which is beside the first portion, then a fourth portion and then a fifth portion, the bent rod being such that when it is placed in a particular orientation with the first portion horizontal and the rod is viewed from above the third and fifth portions appear to be on opposite sides of the axis of the first portion, said second bending operation resulting in said other end of the rod being up-turned, and said apparatus comprising a first shaping tool, a second shaping tool and means for forcing one of the shaping tools towards the other, when part of the rod is between them, so that the whole of that part of the length of the rod which, when the finished clip is in a particular position, in which the lowermost points on both ends of the first portion lie in a horizontal plane, the lowermost points on the third and fifth portions lie in another horizontal plane and the fourth portion crosses and lies above the axis of the first portion, is between the lowermost point on the fifth portion and said other end of the rod is forced, by the first shaping tool, into contact with the second shaping tool, said apparatus further comprising support means for supporting the bent rod during the second bending operation and providing first, second, third and fourth support surfaces positioned for supporting the first, second, third and fourth portions, respectively, of the bent rod.
Dependencies are inferred from the claim text.