Surface flaw detecting device for coated wire

Claim 2

A surface flaw detecting device for coated wire, comprising a feeler member composed of resilient sensing strips (19) to be held in contact with a travelling coated wire and movable upon passage of flaws in the coated layer on the wire, rocker arm strips (20) connected with said respective feeler strips (19) and movable therewith so that upon detection of a flaw in said coated wire by the resilient sensing strip, an electric signal is generated in transmitters (22, 25; 22a, 25a) operable with rocking movement of one or more of said respective rocker arm strips to change the relationship of parts of the transmitters, and the generated electric signal is transmitted to an electric unit whereby a marking roller is operable by meAns under control of the signal output from said electric signal transmitters to mark the coated wire with ink or the like meidum at locations of the flaws detected.

Claim 3

A surface flaw detecting device as claimed in claim 1, in which said sensing strips each take the form of an angular bent plate fixed at one end to a stationary support wall (18) formed with an opening through which the coated wire (w) travels in a manner so that the other end portion of the bent plate extends forwardly in the direction of wire travel to make contact with the coated wire (W) at an angle thereto, said rocker arm strips (20) being integrally secured to the intermediate angular portion of said respective bent plates.

Claim 4

A surface flaw detecting device as claimed in claim 1, in which said electrical signal transmitters are each comprised of a magnet (22) secured to the tip of the associated rocker arm strip (20) and a detecting coil (25) energized by the magnet.

Claim 5

A surface flaw detecting device as claimed in claim 1 in which said electrical signal transmitters are each in the form of a variable capacitor comprised of a movable electrode plate (22a) secured to the tip of the associated rocker arm strip (20) and a fixed electrode plate (25a).

Claim 6

A surface flaw detecting device as claimed in claim 1, in which a plurality of said resilient strips are positioned in substantially equally circumferentially spaced relation to the wire.

Claim 7

A surface flaw detecting device as claimed in claim 1, in which said marking roller (29) is rotatably mounted on a pivotal lever, and a solenoid (34) controlled by means of the signal output from said electrical signal transmitters operably connects to and controls the position of said lever to bring it into contact with the surface of the travelling coated wire when receiving a predetermined signal output.

Claim 8

A surface flaw detecting device for coated wire, comprising a feeler means composed of a plurality of resilient sensing strips (19) operably held in contact with circumferentially spaced portions of a travelling coated wire and movable upon passage of flaws in the coated layer on the wire, individual rocket arm strips (20) secured to and movable with each of said respective sensing strips (19) so that upon detection of a flaw in said coated wire by the resilient sensing strip, an electric signal is generated in one of several two part electro-magnetic electric signal generators (22, 25; 22a, 25a) one part of which is secured to and movable with a respective one of said rocker arm strips, a fixed member adjacent said one part, the second part of said generator having an air gap separation from said first part at all times but being electromagnetically coupled therewith and being secured to said fixed member so as to generate a signal upon rocking movement of one or more of said respective rocker arm strips producing relative movement between said two parts, and the generated electric signal is transmitted to an electric unit whereby a marking roller is operable by means under control of the signal output from said electric signal generators to mark the coated wire with ink or the like medium at locations of the flaws detected.

Claim 9

A surface flaw detecting device for coated wire, comprising a feeler means composed of a plurality of resilient sensing strips (19) operably held in contact with circumferentially spaced portions of a travelling coated wire and movable upon passage of flaws in the coated layer on the wire, individual rocket arm strips (20) secured to and movable with each of said respective sensing strips (19) so that upon detection of a flaw in said coated wire by the resilient sensing strip, an electric signal is generated in one of several two part electro-magnetic electric signal generators (22, 25; 22a, 25a) one part of which is secured to and movable with a respective one of said rocker arm strips, a fixed member adjacent said one part, the second part of said generator having an air gap separation from said first part at all times but being electromagnetically coupled therewith and being secured to said fixed member so as to generate a signal upon rocking movement of one or more of said respective rocker arm strips producing relative movement between said two parts, and the generated electric signal is transmitted to an electric unit whereby a marking roller is operable by means under control of the signal output from said electric signal generators to mark the coated wire with ink or the like medium at locations of the flaws detected.

Claim 10

A surface flaw detecting device as claimed in claim 7, in which said marking roller (29) is rotatably mounted on a pivotal lever, a solenoid (34) energized by the signal output from said electrical signal generators operably controls the position of said lever to bring it into contact with the surface of the travelling coated wire, and signal amplification and control means connect to said signal generators and to said solenoid to provide an actuating signal therefor.

Claim 11

A surface flaw detecting device as in claim 7 and where a solenoid controls said marking roller, signal amplification and control means connect to said signal generators to provide an actuating signal to said solenoid, and a plurality of said signal generators are provided and the sum of sucH signals is transmitted to said signal amplification and control means.

Claim 12

A surface flaw detecting device as claimed in claim 7, in which said one parts of said electrical signal generators are each comprised of a permanent magnet (22) secured to the tip of the associated rocker arm strip (20) and said second parts comprise respective detecting coils (25) energized by said magnets to have the energization varied by movement of said strips.

Claim 13

A surface flaw detecting device as claimed in claim 7, in which the plurality of said strips are positioned in substantially equally circumferentially spaced relation to the wire, and contact means are secured to end portions of said strips and protrude therefrom to contact peripheral portions of the wire.