Impact-testing apparatus

Claim 2

In an impact tear-test apparatus of the type including an anvil for supporting a steel test-piece and a pendulous hammer for fracturing said test-piece, and wherein the energy required to fracture the test-piece is indicated by the residual swing of the hammer following said fracture the combination with a steel frame on which said hammer is supported for swinging movement, and a steel frame for supporting said anvil, of a concrete foundation, and separate means respectively supporting said hammer frame and said anvil frame on said foundation, said foundation being constructed and including means for damping the transmission of impact forces from said anvil frame to said hammer frame.

Claim 3

An impact test apparatus as defined in claim 1 characterized by said concrete foundation comprising reinforced concrete pads on opposite sides of said anvil, and by said hammer frame being secured to and supported on said pads.

Claim 4

An impact test apparatus as defined in claim 1 characterized by a reinforced concrete pier for supporting said anvil, said pier being positioned in and forming a part of said foundation.

Claim 5

An apparatus as defined in claim 3 characterized by said pier comprising a horizontal steel plate at its upper end on which said anvil is mounted, and vertically extending steel columns embedded in the concrete of said pier, the upper ends of said columns having engagement with opposite sides of said anvil plate and operating to hold said plate against horizontal movement by impact forces transmitted thereto through said anvil.

Claim 6

An apparatus as defined in claim 4 characterized by the provision oF a strip of composite-vibration-damping material about said pier for damping the transmission of impact vibration from said pier to said concrete foundation.

Claim 7

An impact test apparatus as defined in claim 1 characterized by said foundation comprising a reinforced concrete floor, and a reinforced concrete pier on which said anvil is supported, said floor having an opening in which said pier is positioned so that it forms a part of said concrete foundation.

Claim 8

An apparatus as defined in claim 6 characterized by there being a composite layer of vibration-damping material about the edges of said floor opening and operating to dampen the transmission of vibratory impact forces from said pier through said concrete floor.

Claim 9

An apparatus as defined in claim 6 characterized by said floor having rectangularly shaped openings therein respectively spaced outwardly with respect to opposite ends of said anvil and pier, reinforced concrete pads in each of said openings, and by said hammer frame being secured to and supported by said pads.

Claim 10

In an impact testing machine, the combination comprising a pair of spaced reinforced concrete pads, a frame including a pair of vertically extending and laterally spaced steel columns having their lower ends secured to and supported on opposite ends of one of said pads, and second pair of laterally spaced steel columns supported on opposite ends of the other of said pads and extending angularly upwardly therefrom, said second pair of columns being secured at their upper ends to the upper ends of said first pair, means including a crossbeam connecting said columns in laterally spaced relation, horizontal pivot means supported on said second pair of columns at a point intermediate their upper and lower ends, a pendulum having a hammer at its lower end supported for swinging movement on said pivot means, an anvil under said pivot means for supporting a steel specimen in a position to be broken by said hammer, a reinforced concrete pier between said pads for supporting said anvil, and means spacing the sides of said pier from the facing sides of said slabs, whereby the energy required to brake said specimen is indicated by the residual swing of said hammer following breakage of the specimen.

Claim 11

In an impact testing machine, the combination comprising a pair of spaced reinforced concrete pads, a frame including a pair of vertically extending and laterally spaced steel columns having their lower ends secured to and supported on opposite ends of one of said pads, and second pair of laterally spaced steel columns supported on opposite ends of the other of said pads and extending angularly upwardly therefrom, said second pair of columns being secured at their upper ends to the upper ends of said first pair, means including a crossbeam connecting said columns in laterally spaced relation, horizontal pivot means supported on said second pair of columns at a point intermediate their upper and lower ends, a pendulum having a hammer at its lower end supported for swinging movement on said pivot means, an anvil under said pivot means for supporting a steel specimen in a position to be broken by said hammer, a reinforced concrete pier between said pads for supporting said anvil, and means spacing the sides of said pier from the facing sides of said slabs, whereby the energy required to brake said specimen is indicated by the residual swing of said hammer following breakage of the specimen.

Claim 12

An impact testing machine as defined in claim 9 characterized by a reinforced concrete floor having openings therein through which said pier and said pads project.

Claim 13

An impact testing machine as defined in claim 10 characterized by there being a lining of vibration insulating material between the sides of said pier and said slabs and the edges of said floor openings for damping the transmission of impact force from said pier to said slabs.