Patents by Inventor Lawrence William Tomczak
Lawrence William Tomczak has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 4102311Abstract: An integrator circuit is reset at predetermined engine crank angles to develop a sawtooth waveform representing engine crank angle. A comparator circuit, including an adjustable, voltage source output, is connected in a closed feedback loop around the integrator to regulate the peak of the sawtooth to a predetermined magnitude which is independent of engine speed, and, hence, independent of the sawtooth frequency. The analog output of the comparator represents engine speed. An adjustable calibration resistor in the integrator adjusts the integrator output to secure a desired relationship between the output of the comparator circuit and the frequency of the sawtooth. The complete circuit requires only two operational amplifiers and a small number of passive circuit elements.Type: GrantFiled: January 30, 1975Date of Patent: July 25, 1978Assignee: Chrysler CorporationInventors: Frederick William Crall, Lawrence William Tomczak, LaVerne Andrew Caron
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Patent number: 4066054Abstract: An electronic engine spark timing controller contains a throttle position transducer circuit and an intake manifold vacuum transducer circuit which provide respective signals representing the throttle position and the magnitude of intake manifold vacuum. Each of these two circuits contains a novel configuration of electronic circuit elements to develop an output electrical waveform composed of repetitive pulses each of which has a pulse width representative of the corresponding mechanical input signal which is supplied to the circuit via a transducer in the form of a coil whose inductance is varied in accordance with the mechanical input signal. The coil in each transducer circuit forms a portion of an RL type monostable circuit which exhibits an electrical transient when triggered. Both transducer circuits are triggered from a free-running pulse generator which is set to generate pulses at a fixed frequency.Type: GrantFiled: December 22, 1975Date of Patent: January 3, 1978Assignee: Chrysler CorporationInventors: LaVerne Andrew Caron, Lawrence William Tomczak, Frederick William Crall
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Patent number: 4058888Abstract: A variable inductance transducer for providing, via inductance modulation, an electrical output signal which is representative of a mechanical input signal. The transducer comprises a cylindrical plastic bobbin on which an inductive coil is wound. A pair of electrical terminal receiving sockets for a pair of electrical terminals are formed at one end of the bobbin and a pair of electrical terminals are disposed therein. The ends of the wire forming the coil are soldered to the terminals. A protective enclosure is molded around the coil and the portions of the terminals received in the sockets to enclose the coil and lock the terminals in place in the sockets. A ferrite core is slidably arranged within a central axial bore in the bobbin to vary the inductance of the transducer in accordance with the axial portion of the core.Type: GrantFiled: February 2, 1977Date of Patent: November 22, 1977Assignee: Chrysler CorporationInventors: Lawrence William Tomczak, Frederick William Crall, LaVerne Andrew Caron, Walter Joseph Campau
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Patent number: 4055886Abstract: A variable inductance transducer for providing, via inductance modulation, an electrical output signal which is representative of a mechanical input signal. In a preferred embodiment the mechanical input signal is the intake manifold vacuum of an internal combustion engine and the electrical output signal is utilized in an engine spark timing control system to adjust the spark timing in accordance with the intake manifold vacuum. The transducer comprises an actuating mechanism in the form of a vacuum servo which axially positions a ferrite core within a central axial bore of a plastic bobbin on which an inductive coil is wound to thereby vary the inductance of the coil in accordance with the vacuum applied to the servo. The bobbin and coil are enclosed in plastic to form a separate unit which is assembled into the transducer by being controllably lodged within the bore of a molded plastic element forming a portion of the body of the transducer.Type: GrantFiled: December 13, 1976Date of Patent: November 1, 1977Assignee: Chrysler CorporationInventors: Lawrence William Tomczak, Frederick William Crall, La Verne Andrew Caron, Walter Joseph Campau
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Patent number: 4050093Abstract: A housing containing a pair of electronic circuit boards removably mounts on the side of an engine air filter housing. The circuit board housing has a generally concave inner face matching the convex contour of the air filter housing side wall and is disposed over air circulation openings in the air filter housing side wall. In a first embodiment, the circuit board housing is of one-piece construction and the electronic circuit boards are disposed interiorly of the outer wall of the circuit board housing and in generally parallel relationship therewith. In a second embodiment, the circuit board housing is of two-piece construction having upper and lower halves. In this embodiment, the circuit boards are horizontally disposed, one each in each of the two housing halves. Connectors for effecting connection of the circuit boards with the other components of the system which are located exteriorly of the air cleaner housing extend through holes in the circuit board housing.Type: GrantFiled: February 19, 1976Date of Patent: September 20, 1977Assignee: Chrysler CorporationInventors: Frederick William Crall, Lawrence William Tomczak
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Patent number: 4042899Abstract: A variable inductance transducer for providing, via inductance modulation, an electrical output signal which is representative of a mechanical input signal. The transducer comprises a cylindrical plastic bobbin on which an inductive coil is wound. A pair of electrical terminal receiving sockets for a pair of electrical terminals are formed at one end of the bobbin and a pair of electrical terminals are disposed therein. The ends of the wire forming the coil are soldered to the terminals. A protective enclosure is molded around the coil and the portions of the terminals received in the sockets to enclose the coil and lock the terminals in place in the sockets. A ferrite core is slidably arranged within a central axial bore in the bobbin to vary the inductance of the transducer in accordance with the axial position of the core.Type: GrantFiled: March 11, 1976Date of Patent: August 16, 1977Assignee: Chrysler CorporationInventors: Lawrence William Tomczak, Frederick William Crall, LaVerne Andrew Caron, Walter Joseph Campau
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Patent number: 4024483Abstract: A variable inductance transducer for providing, via inductance modulation, an electrical output signal which is representative of a mechanical input signal. The transducer comprises a cylindrical plastic bobbin on which an inductive coil is wound. A pair of electrical terminal receiving sockets for a pair of electrical terminals are formed at one end of the bobbin and a pair of electrical terminals are disposed therein. The ends of the wire forming the coil are soldered to the terminals. A protective enclosure is molded around the coil and the portions of the terminals received in the sockets to enclose the coil and lock the terminals in place in the sockets. A ferrite core is slidably arranged within a central axial bore in the bobbin to vary the inductance of the transducer in accordance with the axial position of the core.Type: GrantFiled: March 17, 1975Date of Patent: May 17, 1977Assignee: Chrysler CorporationInventors: Lawrence William Tomczak, Frederick William Crall, LaVerne Andrew Caron, Walter Joseph Campau
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Patent number: 4024485Abstract: A variable inductance transducer for providing, via inductance modulation, an electrical output signal which is representative of a mechanical input signal. The transducer comprises a cylindrical plastic bobbin on which an inductive coil is wound. A pair of electrical terminal receiving sockets for a pair of electrical terminals are formed at one end of the bobbin and a pair of electrical terminals are disposed therein. The ends of the wire forming the coil are soldered to the terminals. A protective enclosure is molded around the coil and the portions of the terminals received in the sockets to enclose the coil and lock the terminals in place in the sockets. A ferrite core is slidably arranged within a central axial bore in the bobbin to vary the inductance of the transducer in accordance with the axial position of the core.Type: GrantFiled: March 11, 1976Date of Patent: May 17, 1977Assignee: Chrysler CorporationInventors: Lawrence William Tomczak, Frederick William Crall, LaVerne Andrew Caron, Walter Joseph Campau
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Patent number: 4024484Abstract: A variable inductance transducer for providing, via inductance modulation, an electrical output signal which is representative of a mechanical input signal. In a preferred embodiment the mechanical input signal is the intake manifold vacuum of an internal combustion engine and the electrical output signal is utilized in an engine spark timing control system to adjust the spark timing in accordance with the intake manifold vacuum. The transducer comprises an actuating mechanism in the form of a vacuum servo which axially positions a ferrite core within a central axial bore of a plastic bobbin on which an inductive coil is wound to thereby vary the inductance of the coil in accordance with the vacuum applied to the servo. The bobbin and coil are enclosed in plastic to form a separate unit which is assembled into the transducer by being controllably lodged within the bore of a molded plastic element forming a portion of the body of the transducer.Type: GrantFiled: November 3, 1975Date of Patent: May 17, 1977Assignee: Chrysler CorporationInventors: Lawrence William Tomczak, Frederick William Crall, La Verne Andrew Caron, Walter Joseph Campau
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Transducer circuits for providing pulses whose widths are representative of mechanical input signals
Patent number: 3997801Abstract: An electronic engine spark timing controller contains a throttle position transducer circuit and an intake manifold vacuum transducer circuit which provide respective signals representing the throttle position and the magnitude of intake manifold vacuum. Each of these two circuits contains a novel configuration of electronic circuit elements to develop an output electrical waveform composed of repetitive pulses each of which has a pulse width representative of the corresponding mechanical input signal which is supplied to the circuit via a transducer in the form of a coil whose inductance is varied in accordance with the mechanical input signal. The coil in each transducer circuit forms a portion of an RL type monostable circuit which exhibits an electrical transient when triggered. Both transducer circuits are triggered from a free-running pulse generator which is set to generate pulses at a fixed frequency.Type: GrantFiled: March 17, 1975Date of Patent: December 14, 1976Assignee: Chrysler CorporationInventors: LaVerne Andrew Caron, Lawrence William Tomczak, Frederick William Crall -
Patent number: 3996914Abstract: A housing containing a pair of electronic circuit boards removably mounts on the side of an engine air filter housing. The circuit board housing has a generally concave inner face matching the convex contour of the air filter housing side wall and is disposed over air circulation openings in the air filter housing side wall. In a first embodiment, the circuit board housing is of one-piece construction and the electronic circuit boards are disposed interiorly of the outer wall of the circuit board housing and in generally parallel relationship therewith. In a second embodiment, the circuit board housing is of two-piece construction having upper and lower halves. In this embodiment, the circuit boards are horizontally disposed, one each in each of the two housing halves. Connectors for effecting connection of the circuit boards with the other components of the system which are located exteriorly of the air cleaner housing extend through holes in the circuit board housing.Type: GrantFiled: March 18, 1976Date of Patent: December 14, 1976Assignee: Chrysler CorporationInventors: Frederick William Crall, Lawrence William Tomczak