Did You Know...
...that two musicians were responsible for the invention of color print film? Fascinated by photography, Leopold Godowsky and Leopold Mannes worked together to produce an easy-to-use, practical color film. They worked full time as music teachers and gave concerts while experimenting during their off hours in Mannes' kitchen. Their success earned them full-time, well-paying jobs at Kodak and their efforts resulted in Kodachrome film, which was introduced in 1935.
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| Number | Title | Issue Date |
| 5253930 | Air brake control system having an electromagnetic valve device which has two set points for establishing a lap position An electromagnetic valve control system employing a controller circuit for controlling the position of a pneumatic valve by regulating the magnetizing current provided to the electrical solenoid by establishing a first magnetizing current set point when t... | 10/19/1993 |
| 5209551 | Analog service brake response enhancing circuit for railway vehicles An analog service brake response enhancing circuit including an intelligent filter circuit for removing voltage transients appearing on input feedback signals, a friction brake request circuit for receiving input brake command request signals, a force mot... | 05/11/1993 |
| 5192118 | Electro-pneumatic locomotive brake control system A microprocessor based electro-pneumatic locomotive brake control system in which a brake application is obtained automatically on the locomotive consist and train only in response to a loss of power at the lead or controlling locomotive microprocessor, a... | 03/09/1993 |
| 5170818 | Safety valve A safety valve including a brass valve body having a through bore provided with a circular sharp-edged valve seat and another sharp edge. A valve stem carrying a ball valve and a biasing spring disposed in the through bore. A cap member screwed through on... | 12/15/1992 |
| 5154204 | Automatic drain valve for a compressed air system A pneumatically actuated drain valve device for venting the moisture in an air dryer to atompshere including a rolling diaphragm for linearly moving a piston stem assembly to unseat a spring and pressure biased stainless steel ball valve from its conicall... | 10/13/1992 |
| 5131612 | Arrangement for positively determining the actual sounding of a warning horn on a railway vehicle A system for positively determining that an engineman has actually activated a manual whistle valve to sound a pneumatic warning horn on a railway vehicle having a low pressure and high pressure sensing apparatus for conveying signals to an event recorder... | 07/21/1992 |
| 5125722 | Load compensation control valve A load compensation control valve for an air brake system for railway vehicles having air springs for producing control pressures proportional to the load sustained by the given vehicle. The load compensation control valve includes a supply chamber, an ou... | 06/30/1992 |
| 5124988 | Dump valve operational fault-determination system A dynamic diagnostic operational dump valve fault-detection system including a first logic network connected to a release reset circuit and to an applied reset circuit, the release reset circuit connected to a release timer circuit and a release flag circ... | 06/23/1992 |
| 5118166 | Quick service function for railway freight brake control valve device An accelerated application valve having a cyclic mode of operation during one phase of which a local quick service reduction of brake pipe pressure occurs and a steady state mode of operation during which a continuous local quick service reduction of brak... | 06/02/1992 |
| 5106270 | Air-cooled air compressor An air supply system having a multi-cylinder, two-stage air compressor including a pair of low pressure cylinders and a high pressure cylinder. A first intercooler interconnected between the outlet of one of the pair of low pressure cylinders and the inle... | 04/21/1992 |
| 5104203 | Arrangement for emulating a J-type relay air valve useable in a railway braking system An electropneumatic locomotive brake system including an emulation routine for electronically simulating the functional operations of a relay air valve and for producing electrical output signals, an application electromagnetic and a release electromagnet... | 04/14/1992 |
| 5096266 | Dual-response vent valve device A brake control system having a vent valve device in which a control piston is effective to unseat a normally closed vent valve to provide rapid exhaust of brake pipe pressure to either propagate an emergency brake application in response to brake pipe pr... | 03/17/1992 |
| 5086641 | Arrangement for dynamic calibrating an absolute position encoder A dynamic calibration arrangement comprising, a brake handle for controlling the braking of a railway vehicle, an absolute position encoder for monitoring the position of the brake handle, an electrical switch for ascertaining when the brake handle is in ... | 02/11/1992 |
| 5083586 | Mounting arrangement for connecting a fluid pressure valve to a pipe bracket by a hollow adapter member A tube seat installation device having a piping connecting part of a special coupling joint being attached on one side of the input piping opening or the output piping opening of the fluid pressure valve while at the same time having a cylindrical part of... | 01/28/1992 |
| 5072913 | Spring loaded locking handle for angle cock or the like A spring loaded locking handle assembly for an angle cock or the like wherein the helical windings of a torsion type spring are mounted on a fulcrum pin about which the handle proper of a two-piece, locking style handle assembly is pivotally connected to ... | 12/17/1991 |
| 5065679 | Articulated coupling apparatus for connecting adjacent ends of a pair of railway cars together in a semipermanent manner The present invention provides an articulated coupling apparatus which connects one end of one railway car to an adjacent end of a second railway car in a semipermanent manner. Such coupling apparatus includes a male connection member, a female connection... | 11/19/1991 |
| 5058712 | Pre-loading pivotal pin connection for a disc brake assembly A preloading pivotal pin connection arrangement for interconnecting a swivel bracket to a forked support bracket of a fluid pressure operated caliper disc brake unit. The pivotal pin includes a shoulder portion which fits snugly into a hole formed in one ... | 10/22/1991 |
| 5036468 | Arrangement for reading an absolute position encoder for determining the operating position of a break handle An apparatus for reading the binary value of a digital absolute position encoder for obtaining an operating position of a brake handle for a railway vehicle including a storage circuit for storing a binary value of an initial offset release position of th... | 07/30/1991 |
| 5035582 | Electro-pneumatic governor for a compressed air-system A fluid governor including an electric motor for driving a fluid compressor and causing a build-up of pressure in a storage reservoir, pressure switch responsive to the pressure in the storage reservoir, electromagnetic solenoid valve connected to the pre... | 07/30/1991 |
| 5020862 | Penalty brake control system A penalty brake control system for a railway locomotive in which a first pressure switch controls the venting of the control chamber of a penalty brake application valve. Reset of the penalty brake application valve, following actuation in response to an ... | 06/04/1991 |
| 4999779 | Axle health discriminatory safety timer arrangement for controlling wheel slip on a multiple-axle railway vehicle An axle health discriminatory safety timer arrangement for a railway vehicle braking system including a first logic network connected to a pair of safety timers. The pair of safety timers being connected to a second logic network. The second logic network... | 03/12/1991 |
| 4987543 | Wheel spin control system An energy storage wheel spin propulsion control system for detecting and correcting a spinning wheel situation so that the maximum available adhesion is utilized to the fullest extent in accelerating a railway vehicle while at the same time maximizing the... | 01/22/1991 |
| 4979391 | Transducer operational fault determination system A dynamic diagnostic operational transducer fault detection system including a first logic network which is connected to a low level pressure offset circuit and to an operational transducer to transducer equivalence check circuit. The low level pressure o... | 12/25/1990 |
| 4971399 | System for assuring recharge of brake pipe pressure in holding position of locomotive brake valve In an electropneumatic brake control system including a brake valve in which a holding position permits brake pipe recharge without effecting a concurrent release of brakes, there is provided an arrangement for preventing a release control valve of a pena... | 11/20/1990 |
| 4972145 | Speed sensor gap fault-detection arrangement for multiple-axle rail vehicles A magnetic speed sensor air gap fault-detection arrangement having a two-input AND gate for each of the two-axle trucks of a railway vehicle for conditioning a gap process circuit common to each axle. Each of the gap process circuits of each axle is activ... | 11/20/1990 |
| 4957208 | Multiple contact electrical connector portion for an automatic railway coupler An electrical connection portion for a railway car coupler having multiple contacts for being connected to train line circuits. The electrical connection portion includes a plurality of movable and stationary contact elements and a plurality of conductive... | 09/18/1990 |
| 4949754 | Pressure control valve for railway vehicles A railway car pressure control valve having an adjustable middle body member. An air supply chamber connected to a source of compressed air and an output chamber connected to an output passage. An exhaust chamber opened to the atmosphere. An air supply va... | 08/21/1990 |
| 4941099 | Electronic adhesion adaptive wheel slide protection arrangement function An electronic slip control system for railway vehicle brakes having a standard slip control logic circuit responsive to axle speed and rate signals to produce a multi-bit binary number word. A primary slip control word formation circuit for converting the... | 07/10/1990 |
| 4917148 | Load dependent valve for railway vehicles A load dependent valve for railway cars including first and second springs, each having one end contacting a balance piston. A first spring adjusting mechanism for adjusting the compressive force of the first spring and a second spring adjusting mechanism... | 04/17/1990 |
| 4904027 | Digital air brake control system A pneumatic pressure control arrangement for controlling the brakes of railway vehicles. A manual brake command controller converts a selected brake position into a corresponding electrical signal. An application magnet valve is connectable to a source of... | 02/27/1990 |
| 4887636 | Apparatus for the continuous control of solenoid valves which are normally designed for intermittent operation Apparatus for continuously controlling an electrically-actuated solenoid valve which regulates the fluid pressure conveyed to a brake cylinder. The solenoid valve is designed for intermittent operation. A pressure transducer senses and generates an actual... | 12/19/1989 |
| 4886320 | Vital pressure regulating system for railroad cars A vital pressure regulating system is constructed using an alternating current system, and the absolute value of an output signal is inversely proportional to the air pressure in the main air reservoir and therefore if some critical circuit component fail... | 12/12/1989 |
| 4885693 | Wheel-slip detection system A wheel slip detection system which is especially effective in cases where a gentle or sluggish slip simultaneously occurs on all the axles of a vehicle. For instance, when the velocity difference (ƊV) between the standard speed, namely, the maximum axle... | 12/05/1989 |
| 4883089 | Railway car pressure control valves A pressure control valve for railway vehicles having a variable control mechanism for adjusting the gain of the output pressure to input pressure by controlling the effective area ratio on opposite sides of a piston. A balance diaphragm disposed on one si... | 11/28/1989 |
| 4865278 | Control command system for railway vehicles A brake and/or propulsion command arrangement for railway vehicles, especially for abnormality detection of a dual brake system having a cam controller for producing ON-OFF control signals. The abnormal detection system employs a comparing circuit for comparin... | 09/12/1989 |
| 4865394 | Straight air brake control system An electromagnetic straight air brake equipment, especially to an air brake command system for railway vehicles for controlling the brake pipe pressure by employing an electric brake command type brake controller and electropneumatic convertor valve arran... | 09/12/1989 |
| 4859942 | Circuit arrangement for sensing the displacement of a movable iron core relative to a magnetic coil by measuring the decay time of a constant current flowing through the magnetic coil The arrangement comprises, a circuit arrangement for measuring the inductance of an inductive displacement or position sensor having a magnetic coil and a magnetic circuit including a movable iron core; a constant controlled current source connected to th... | 08/22/1989 |
| 4854648 | Automatic air braking system An automatic air braking system for a railway train having a flow detector for sensing the flow of pressurized air in the brake line during a brake release command time. A pilot chamber located in a relay valve which is pressurized when a signal from the ... | 08/08/1989 |
| 4854647 | Automatic air brake systems with accelerated exhaustion of the brake line An automatic air brake system for accelerating the exhaustion of the pressure in the brake line of a train for more rapidly applying the brakes on all the railway vehicles. A flow rate detector connected to the brake line of the locomotive to detect the f... | 08/08/1989 |
| 4845428 | Magnetic rotational detecting arrangement for sensing the speed of a railway vehicle A magnetic speed detecting arrangement for a railway vehicle including a number of permanent magnets fixed on the outer circumference of an axle of the railway vehicle at fixed intervals in which the distance between two adjacent permanent magnets is larg... | 07/04/1989 |
