Did You Know...
...that the Slinky toy was the result of a failed attempt by engineer Richard James to produce an antivibration device for ship instruments? His goal was to develop a spring that would instantaneously counterbalance the wave motion that rocks a ship at sea. Instead, he developed the Slinky.
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| Number | Title | Issue Date |
| 4713831 | Counting method and device A counting device for counting the number of objects such as folded box blanks in a flow of folded box blanks characterized by a sensor having a portion engaging a leading edge of a blank in the flow and being moved to activate a pulse generating device. ... | 12/15/1987 |
| 4621727 | Conveyor belt damage sensor An improved form of conductor wires utilizing a jacketing envelope for inclusion into a conveyor belt. Low coefficient of friction envelopes form small voids in the conveyor belt carcass to allow the conductors to freely move during flexing of the belt in... | 11/11/1986 |
| 4587852 | Conveyor belt tension sensing The tension of a conveyor belt having at least one connection joint including joint components provided on the ends of both connected belt portions is sensed by mounting a tensile force sensor between the joint components and deriving a signal indicative ... | 05/13/1986 |
| 4577502 | Conveyor belt monitor Flaws may be detected in conveyor belting in motion by transmitting ultrasound to the belting at one zone, detecting ultrasound propagated by the belting from the one zone to another zone spaced apart from the first and issuing a signal responsive to any ... | 03/25/1986 |
| 4464654 | Time independent logic system for rip detectors A rip detector system accurately monitors the integrity of a conveyor belt or the like substantially as a function of signals that establish a variable time frame determined according to belt speed and a further signal representing integrity. The belt inc... | 08/07/1984 |
| 4447807 | Signal to noise ratio improvement for rip detectors The frequency of the AC signal used to detect the integrity or lack of same in a conveyor belt is reduced to be in the 25 KHz. to about less than 200 KHz. and most preferably in the 50 KHz. to 100 KHz. frequency range. When such AC signals are capacitivel... | 05/08/1984 |
| 4436198 | Conveyor belt system having a phase shift indicator and adjuster for optimum tuning of a synchronous rip detector circuit Existing conveyor belt rip detection systems presently incorporate a synchronous detector circuit for increasing the rejection of electrical noise. In order for the detector circuit to work at peak efficiency, the input signal occurring when an antenna is... | 03/13/1984 |
| 4349883 | Signal detector circuit with gain control method A signal control apparatus controls the gain of an amplifier in a proportional stepwise manner to produce in response to an input signal an output signal having a magnitude of relatively accurately controlled value. The amplifier gain is controlled in ste... | 09/14/1982 |
| 4328603 | Street sweeping machine A street sweeping vehicle with a single engine both for the purpose of propulsion and generation of hydraulic power. The hydraulic power is used to drive individual hydraulic motors controlling the main broom, gutter broom and debris elevating system. Eac... | 05/11/1982 |
| 4229735 | Rip detector signal detection circuit A detection circuit accurately monitors an AC signal, which is pulse modulated by information characteristic or indicative of the integrity of a conveyor belt or the like, to provide a distinguishable output representative of such integrity. Such distingu... | 10/21/1980 |
| 4106005 | Apparatus for detecting elongation of a joint of a conveyor belt An apparatus for detecting elongation of the joint of a conveyor belt has a pair of sensors, each of which includes an iron core having a coil winding therearound and being spaced at a predetermined distance from each other parallel with the conveyor belt... | 08/08/1978 |
| 4096753 | Mine equipment Mine equipment for measuring conveyor advance includes two roof support assemblies and control means to ensure each of the assemblies can be advanced only when the other assembly is anchored. The two assemblies are linked by a transducer which senses move... | 06/27/1978 |
| 4088222 | Belt switch An endless-conveyor monitoring switch assembly includes an elongated frame having a shaft journaled for rotation therein and extending longitudinally therealong. A drive wheel is attached to and rotatable with the shaft at a first end of the elongated fra... | 05/09/1978 |
| 4087800 | Conveyor belt monitoring system A monitoring system for detecting a longitudinal rip in a conveyor belt senses the presence of the rip and simultaneously produces a warning signal and stops the operation of the conveyor system. The system includes a series of sensor circuits embedded in... | 05/02/1978 |
| 4017826 | Method and apparatus for extending the operating range of a condition monitoring system Apparatus and method for extending the operating range of a condition monitoring system that detects the occurrence of an abnormal condition on a first member moving relative to a second member; the system including a sensor circuit on the first member ad... | 04/12/1977 |
| 4001613 | Proximity sensing circuit A proximity sensor system includes first and second circuits connected at their inputs to a source of sampling pulses and at their outputs to a difference circuit. A proximity sensor is connected to the first circuit for modifying the amplitude of the sig... | 01/04/1977 |
| 3938116 | Leak detection device The invention relates to a leak detection device comprising a pair of metal probes which are positioned on a conveyor to detect leakage from broken bottles within a cardboard carton or carrier and which probes are connected to a suitable alarm system and/... | 02/10/1976 |
