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| Number | Title | Issue Date |
| 4528488 | Warning device using power tool residual kinetic energy A warning and braking device for use on a power cutting tool such as a circular saw or a lawnmower comprises a generator, a drive shaft and a pulley connected by a lever to the power tool on/off switch. When the power tool is in the working "on" position,... | 07/09/1985 |
| 4514797 | Worn tool detector utilizing normalized vibration signals A worn tool detector system for analyzing input signals from a sensor were the signal is in the form of an analog waveform exhibiting periodic impulses exceeding the average amplitude thereof as the tool wears. A microprocessor controlled variable gain am... | 04/30/1985 |
| 4510566 | Machine tool readout with automatic cutter radius offset In an improved digital readout for machine tools, an apparatus is provided which automatically offsets the digital position display by the radius of the cutting tool. A machinist is thereby enabled to work more rapidly and with reduced chance of making er... | 04/09/1985 |
| 4504824 | Tool detection system Apparatus for detecting the presence of a tool in a spindle which can be used where automatic unattend operation occurs and it must be known that a tool is in the spindle. For example, if the tool changer on a machining center dropped a tool when transfer... | 03/12/1985 |
| 4503425 | Indicating arrangement for portable electric devices A portable electric device in which a surveying arrangement is incorporated for permitting a reading of the corresponding operating condition. The surveying arrangement consists of a visual reading instrument which is arranged on the casing so as to be wi... | 03/05/1985 |
| 4502042 | Proximity switch, which indicates the presence or absence of field changing objects at a defined distance from the proximity switch by a binary signal with the aid of excitation and detection of a field A multi-position proximity switch having a plurality of binary outputs, each output indicating whether the distance between an object and a field transducer exceeds a corresponding one of a plurality of predefined distances. The sensitivity of a proximity... | 02/26/1985 |
| 4449085 | Control for operation of a machine tool To control the operation of a machine tool, which has a tool bit cutting a workpiece, the temperature of a measurement spot or area, such as on the cut surface of the workpiece, is checked by an optical element which collects infra-red radiation and focus... | 05/15/1984 |
| 4447956 | Centering device A centering device for locating and aligning the center of a workpiece with the center axis of the spindle of a manufacturing machine such as a drill press and the like, comprising a centering pointer and a centering block; the centering pointer having a ... | 05/15/1984 |
| 4442494 | Tool wear and tool failure monitor system In a computerized numerical control (CNC) or a direct numerical control (DNC) machine tool, the second derivative as a function of time of the net power applied to the cutting tool is used to detect approaching tool failure, and a statistical representati... | 04/10/1984 |
| 4441103 | Unusual vibration transducer apparatus in machine tools By mounting unusual vibration transducer apparatus consisting of a piezo-electric vibration detecting member, a pre-amplifier including a gain adjust knob, a comparator including level adjust knob, a monostable multivibrator including a pulse width adjust... | 04/03/1984 |
| 4429578 | Acoustical defect detection system The vibration of a moving device which has repetitive movements, for instance a rotary compressor, are sensed at the outer case and analyzed in real time in both the time and frequency plane. For the time analysis the envelope of the signal is generated; ... | 02/07/1984 |
| 4426179 | Tester for key duplicating machines A system for testing key duplicating machines to determine the accuracy thereof. This system is provided with a pair of identical detector plates each of which are intended for alignment positioning of the key and key blank within the two vises of the key... | 01/17/1984 |
| 4425061 | Tool setting device for machining center A tool setting device for a machine tool (10) having a numerical control (22) includes a gage unit (24) with a frame (26) adapted to be secured upon a slide (20) of the machine tool. A photodetector, which includes a source (96) and a receiver (98), is mo... | 01/10/1984 |
| 4410846 | Electric tool with microcomputer Speed regulation, either closed loop or open loop, in a hand-held electric tool such as a drill, a miller, a saw or, in particular, combination tools for home use, is carried out by use of a microcomputer. Then-present operating conditions such as the spe... | 10/18/1983 |
| 4386344 | Electronic edge and center locator and method of using same An electronic edge and center locator is a device for setting up a machine tool so that a tool holding chuck is aligned with a workpiece to be machined. The electronic edge and center locator has a metal probe for contacting a workpiece and the probe has ... | 05/31/1983 |
| 4382253 | Method for measuring abrasion in a grinding operation and apparatus therefor A method and apparatus for measuring the abrasion depth of an outer surface of a substantially stationary body such as a tool which rests in working position against a rotating body such as a shaft to be ground. A measurement pin is inserted in a first di... | 05/03/1983 |
| 4351029 | Tool life monitoring and tracking apparatus Net power consumed by one or more tools, continuously or intermittently is totalized and compared with a predetermined energy limit characterizing the life expectancy of a tool for optimum and safe use on a machine tool. Digital and computer techniques ar... | 09/21/1982 |
| 4339749 | Abnormal condition sensing monitor system for use with machine tools Disclosed herein is an abnormal condition sensing monitor system for use in conjunction with machine tools, such as automatic press apparatus. Means for sensing an abnormal condition of the machine tool is provided in the vicinity of an essential portion ... | 07/13/1982 |
| 4331026 | Indenter-type hardness testing apparatus A material hardness testing apparatus is provided, for use in quality control of production materials and parts, in which a pneumatically actuated indenter probe, incorporating an LVDT displacement transducer, is coupled by an analog-to-digital converter ... | 05/25/1982 |
| 4319403 | Power drill position indicator A device for use in conjunction with a power tool, such as an electric drill, the device including an elongate housing in place on the drill motor housing. The forward end of the housing telescopically supports a carrier within which is universally mounte... | 03/16/1982 |
| 4288180 | Apparatus for truing bolting surfaces of wheels and the like A machine for truing both the tire bead seats, and the side surfaces of a web of a wheel. The machine has a work supporting station with radially inwardly movable bead seat deforming jaws, and top and bottom machining heads on slides which move toward and... | 09/08/1981 |
| 4283721 | Electronic postage meter having check date warning An electronic postal meter is provided with a date setter having an access door coupled to a switch. The position of the switch is signalled to the internal computer, in order to effect a warning indication if the access or dater door is open. The compute... | 08/11/1981 |
| 4260986 | Tool wear detecting system for a numerically controlled machine tool A numerically controlled machine tool controls the movement of a tool relative to a workpiece along a commanded path to cut the workpiece and to detect a load on the tool or workpiece. A specified position or section on the commanded path is the point at ... | 04/07/1981 |
| 4246577 | Tool breakage detecting apparatus A tool breakage detecting apparatus is provided with a preset counter to be preset with a predetermined value. The content of the counter is subtracted one by one each time either one of a tool and a workpiece to be machined is moved a unit distance towar... | 01/20/1981 |
| 4245316 | System for providing time control data in a numerical control system In a numerical control machine tool, the time that the tool or bit actually operates is counted in the control device of the numerical control system. The present time control data collection system comprises a data memory having a plurality of flags, the... | 01/13/1981 |
| 4207567 | Broken, chipped and worn tool detector A method and apparatus for monitoring tool wear and breakage as a function of the electrical power dissipated by a machine tool which is carrying out subsequent cuts for removing stock. Optimal tool life is achieved by monitoring tool wear and breakage as... | 06/10/1980 |
| 4156816 | Optical fire-detector The invention relates to an optical fire-detector in which a radiation-emitting means is arranged to emit a beam of radiation and which has modulator means for the modulation of the beam of radiation in a phase-inverted relationship within a first and a s... | 05/29/1979 |
| 4088899 | Method for controlling an automatic machine tool An automatic punch press and monitoring system. The monitoring system includes a piezoelectric accelerometer mounted within the stationary die shoe of the punch press, and electronic circuitry including a variable gain amplifier, a detector, an integrator... | 05/09/1978 |
| 4087801 | Apparatus for detecting damages of cutting tools A detector for producing an output corresponding to the vibration of a cutting tool or a workpiece worked thereby, a signal processing circuit for obtaining the root mean square value of the output signal from the detector, and a comparator for comparing ... | 05/02/1978 |
| 4051351 | Electronic system for monitoring pneumatic tool performance An electronic system to monitor the performance of a pneumatic impact forming tool is disclosed. A signal is generated in real time representing the actuating pressure of the pneumatic tool. Electronic functions operate on the real time pressure signal ov... | 09/27/1977 |
| 4023044 | Automatic machine tool including a monitoring system An automatic punch press and monitoring system. The monitoring system includes a piezoelectric accelerometer mounted within the stationary die shoe of the punch press, and electronic circuitry including a variable gain amplifier, a detector, an integrator... | 05/10/1977 |
| 4009377 | Positioning determining method and apparatus The method includes steps for and the apparatus includes means for determining the absolute position of a movable element mounted for movement along a path. The method includes the steps of: developing a pseudo random sequence of indicia which uniquely de... | 02/22/1977 |
| 3967261 | Proximity sensor with simultaneously active intermixed sensor types The invention provides an improvement over my earlier U.S. Pat. No. 3,573,783 whereby different types of sensors may be indiscriminately intermingled, intermixed or otherwise used together simultaneously, in the same proximity sensing systems. An antenna ... | 06/29/1976 |
| 3962694 | Method and apparatus for monitoring an electrically actuated tool A method and apparatus for monitoring an electrically actuated tool. The current flowing in the tool circuit is sampled and converted to an analog voltage signal that is proportional to the maximum stress level output of the tool. This converted signal ma... | 06/08/1976 |
