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| Number | Title | Issue Date |
| 5349337 | Apparatus and method for controlling peck drilling Peck drilling operations using a drilling tool with a rotatable bit are controlled according to the present invention. A control computer is used to detect various drilling conditions, such as dull or broken bits, transitions between different materials i... | 09/20/1994 |
| 5319357 | Metal cutting tool failure event sensor Breaking of a cutter insert in a multiple insert metal cutter is detected by selecting a periodic vibration generated electrical signal having components which track individual insert contribution. These components are filtered to provide RMS values whose... | 06/07/1994 |
| 5315289 | Anticipatory interactive protective system One or more sensors located on or surrounding a dangerous condition anticipate when an individual is approaching a hazard zone associated with the dangerous condition and then arms an alarm and activates an interactive protective system which protects an ... | 05/24/1994 |
| 5309109 | Forcible grounding generation equipment and grounding occurrence detection equipment using the same By forcibly grounding a selected one of three phases of a three-phase power distribution line, a higher line-to-ground voltage is applied to other phases thereby causing very small-scale grounding at a fault position so that the fault position can be spec... | 05/03/1994 |
| 5298889 | Metal cutting machine tool break detection A composite low frequency high frequency electrical signal from a metal cutting tool in a metal cutting operation is processed through separate high frequency and low frequency systems and the resulting signals digitized and combined for analysis of a too... | 03/29/1994 |
| 5274220 | Data carrier A data carrier according to the present invention writes a signal of a duty ratio corresponding to write data from a resonance circuit at the time of writing data using a shift register as a memory, causes the shift register to store the data, and then ho... | 12/28/1993 |
| 5266929 | Metal cutting tool wear indicator method and system In a metal cutting tool wear indicator system, a ratio of an estimated ultrasonic emission signal from a metal cutting process to a measured ultrasonic emission signal, e.g. UE/UE is utilized in place of a prior ratio of horsepower to ultrasonic emission,... | 11/30/1993 |
| 5257199 | Apparatus for identifying tools and for managing tool data In a machine tool such as a machining center or the like having an automatic tool changing apparatus, the tool holders adapted to respectively hold the tools provided for the automatic tool change are equipped with transmitters for transmitting signals in... | 10/26/1993 |
| 5212645 | Flexible real-time, multi-tasking architecture for tool condition monitoring This invention utilizes a system of interlinked modular hardware and modular software for continuously controlling the manufacture of a workpiece. By using a modular architecture, the system capabilities can be expanded or modified without requiring major... | 05/18/1993 |
| 5196800 | Apparatus and method for non-contact measurement of the edge sharpness of a knife Non-contact measurement of the sharpness of the cutting edge of a slitting or chopping knife is made repeatably placing a capacitance sensor probe symmetrically over the cutting edge at a predetermined distance (nominal offset) from the calibrated sharp e... | 03/23/1993 |
| 5175532 | Optical drill collar position verifier A drill collar position verifier for use with a drill bit having a drilling depth control collar positioned coaxially thereon. The drill bit is inserted in a cylindrical opening in a plastic block to a depth determined by the position of the collar. Three... | 12/29/1992 |
| 5170358 | Method of controlling chatter in a machine tool A method of controlling chatter in a rotating, chip cutting machine tool cutting at a predetermined depth on a workpiece in which the speed of rotation of the cutting tool relative to the workpiece and the rate of speed of the cutting tool relative to the... | 12/08/1992 |
| 5159836 | Process and device for monitoring the chip-removing treatment of a workpiece A process and device for monitoring the chip-removing treatment of a workce by analyzing the sound emission detectable on the tool which is transformed into an electrical signal, filtered, and compared with respect to its amplitude determined over a pred... | 11/03/1992 |
| 5155473 | Torque and thrust overload detection system for a machine tool A toolholder assembly is divided into a drive toolholder coupled to the drive spindle of a machine tool, and a driven toolholder carrying a cutting tool such as a drill. The driven toolholder is coupled end to end to a drive toolholder so as to be rotatab... | 10/13/1992 |
| 5150529 | Signal transmission system for machine tools, inspection machines, and the like Probes (18A,18B,18C) can be interchangably mounted in the spindle (12) of a machine tool. Each probe has an optical signal transmission system, in which an optical signal from a light emitting diode (26) is transmitted to a receiver module 28. Such an arr... | 09/29/1992 |
| 5150102 | Machining fluid temperature deviation alarm A machining fluid temperature deviation alarm device is attached to an electrical discharge machining device which, having a temperature sensor (S1) for machining fluid temperature detection and a cooler (2) for machining fluid cooling, controls the coole... | 09/22/1992 |
| 5101366 | Method for controlling the manufacture of zirconium tubes A method for operating a computer to control the manufacture process of zirconium tubes in a pilger mill operation, the computer including an electronic memory and being coupled to the pilger mill to receive, as input, data related to the operation of the... | 03/31/1992 |
| 5076102 | Tool monitor The tool monitor according to this invention comprises an acoustic emissions (AE) sensor to be mounted in the neighborhood of and without contact with a machine tool and a tool damage detection means adapted to detect any damage to a tool of the machine t... | 12/31/1991 |
| 5068800 | Crack detection method for shaft at rest The presence, size and location of a crack in a shaft is determined by comparing actual measured natural frequencies of the shaft system with the results of an analytical model. From a multi-station analytical model of an uncracked shaft system, natural f... | 11/26/1991 |
| 5056235 | Signal transmission system for machine tools, inspection machines, and the like Probes (18A, 18B, 18C) can be interchangeably mounted in the spindle (12) of a machine tool. Each probe has an optical signal transmission system, in which an optical signal from a light emitting diode (24) is transmitted to a receiving photodiode (26). T... | 10/15/1991 |
| 5047752 | Safety system for a machine tool A safety system for a machine tools having a powered feed table in which ultrasonic transmitters and receivers are arrayed on the leading, trailing and lateral sides of the table establishing moving protected zones so that if an operator enters the zones,... | 09/10/1991 |
| 5003297 | Method of detecting failure to tighten screws against works and device therefor A method of detecting failure to tighten screws against works includes steps of detecting every screw tightening operation against a work after start of a screw tightening step, counting the number of times of the screw tightening operations detected in t... | 03/26/1991 |
| 5001464 | Contact detecting system in a machine tool A contact detecting system in a machine tool, used in combination with a switch-contained touch sensor seared in a spindle of the machine tool having a movable stylus for making an usually closed switch open by moving itself due to contact with an object ... | 03/19/1991 |
| 4980844 | Method and apparatus for diagnosing the state of a machine The invention provides a method and apparatus for diagnosing the mechanical condition of a machine. The method of the invention includes the following steps: sensing reference vibrational characteristics of a machine in the time domain; creating a referen... | 12/25/1990 |
| 4975855 | Shaft crack detection method The presence, size and location of a crack in a shaft is determined by comparing actual measured natural frequencies of the shaft with the results of an analytical model. From a multistation analytical model of an uncracked shaft, natural frequencies and ... | 12/04/1990 |
| 4967154 | Dynamic tube runout measuring method and apparatus with square wave energized reluctance measuring coils Runout of a high speed, small diameter test rod in a drill spindle is measured by locating a pair of magnetic cores on opposite sides of the rod to establish a pair of magnetic circuits which include the air gaps between the rod and each of the cores. Coi... | 10/30/1990 |
| 4942387 | Apparatus and method for tool break and wear detection A device for determining cutting tool wear and breakage has an accelerometer for sensing tool vibrations. Functions of the AC and DC power of the vibration signal, such as the powers themselves or the square root of the powers, are computed and compared. ... | 07/17/1990 |
| 4918616 | Tool monitoring system A tool monitoring system for detecting a tool failure of a tool employed in a tool machine, comprising artificial signal generating unit for generating a predetermined artificial tool failure signal simulating the acoustic emission signal obtained in an a... | 04/17/1990 |
| 4918427 | Multi-level tool break detection using multi-mode sensing A system and method for monitoring machine tool operations provides a multi-level tool break alarm and uses information from multiple sensors of different types. Signal processing and pattern recognition logic techniques are applied to a cutting process h... | 04/17/1990 |
| 4906980 | Detector of false rotation of power screwdriver The start of the final tightening of a screwdriver and rotation of the screwdriver after the start of the final tightening are detected. The detected rotation is compared with a standard value. The screwdriver should rotate very little during the final ti... | 03/06/1990 |
| 4899391 | Automatic key identification system A system for identifying and matching key blanks when duplicating an original key. A key holder is provided which positions the key horizontally along its longitudinal axis with the key's flat sides in a vertical plane. A lensing subsystem lights and form... | 02/06/1990 |
| 4894644 | Tool break/wear detection using a tracking minimum of detected vibrational signal Gradual wear or breakage of a machine tool which occurs over a period of time is detected by sensing high frequency vibrations produced at the cutting tool/workpiece interface during a machining process. The high frequency vibrations are converted to a un... | 01/16/1990 |
| 4890215 | Electrical apparatus with reverse audible alarm In a preferred embodiment, a reversible DC power supply having an audible alarm, especially for use with electrochemical metallizing equipment. The audible alarm is electrically connected directly to the controls of the power supply so that when the power... | 12/26/1989 |
| 4881858 | Tool offset indicator A tool offset indicator for setting up cutting, milling and drilling operations in manually or programmable numerically controlled machines is provided. The tool offset indicator includes a block of insulating material interposed between electrically cond... | 11/21/1989 |
| 4866429 | Automated machine tool monitoring device A device for monitoring the performance of an automated machine tool. Specifically, the device of the invention monitors the operation of a reciprocating appliance. The device of the invention measures the amount of force being exerted by the appliance du... | 09/12/1989 |
| 4864294 | Position detector with radio transmitter and receiver In a position detector for detecting the position of an object to be detected by making a detecting needle contact with the object to be detected and for transmitting a detecting signal by radio wave, the detecting needle itself functions as a transmissio... | 09/05/1989 |
| 4855925 | Monitoring apparatus Apparatus for monitoring a grinding machine to produce a simultaneous plot of relative displacement between a grinding wheel and a workpiece and the power consumed during the relative displacement receives signals from a linear displacement transducer and... | 08/08/1989 |
| 4853680 | Groove cutting tool break event detecting method and system Vibrations at the groove cutting tool-workpiece interface are sensed by a vibration sensor such as, for example, an accelerometer, and the vibration sensor output is processed to yield an electrical signal indicative of groove cutting tool cutting noise v... | 08/01/1989 |
| 4849741 | Tool break detecting method and system preventing false alarms due to rough surfaces Substantial cutting condition changes which occur in intermittent bursts as rough surfaced workpieces are turned generate specific vibration signal signatures known as the runout condition. Either an upper or a lower threshold is set and all mean signal s... | 07/18/1989 |
| 4831364 | Drilling machine A drive motor connected to a drill bit serves to actuate the drill bit. An electric current is allowed to flow through the drive motor to activate the drive motor. A mechanism serves to feed the drill bit with respect to a workpiece. The current flowing t... | 05/16/1989 |
