Did You Know...
...that Charles Goodyear performed some of his experiments on rubber while in debtor's prison? He was there so often he referred to it as his "hotel". Chronically in debt because of poor business sense and ill health, Goodyear depended on the generosity of friends and family. Even after he unlocked the secret to vulcanizing rubber, he was unable to improve his financial situation. When he died, his estate was $200,000 in debt.
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| Number | Title | Issue Date |
| 4455807 | Splice rail assembly A splice rail assembly for joining two adjacent panels in a coplanar relationship having two parallel tongues extending perpendicularly therefrom, the first of which tongues is located substantially in the mid-portion of the splice rail, the second being ... | 06/26/1984 |
| 4454984 | Auxiliary circulation system for vehicle heaters The invention relates to an improved auxiliary circulation system for vehicle heaters in which the engine coolant is circulated through the vehicle heater after the engine is shut off. The improved system includes a voltage monitor coupled between the pow... | 06/19/1984 |
| 4372716 | Freight bracing bulkhead trolley and latching system An improved trolley structure for a freight bracing bulkhead assembly. The sprocket wheels of the trolley structure are designed to cooperate with the same apertures in supporting tracks located in a cargo area as cooperate with the locking pins of the bu... | 02/08/1983 |
| 4345862 | Modular freight bracing bulkhead assembly A freight bracing bulkhead assembly having a bulkhead with easily removable freight engaging panels. The bulkhead is adopted to be suspended from a trolley system cooperating with overhead tracks in a cargo area for movement along the tracks. Locking mean... | 08/24/1982 |
| 4342267 | Hopper discharge unit with sliding gate A hopper discharge unit for attachment to the bottom of a hopper has upright side and sloping end walls all terminating in horizontally inwardly directed flanges defining between them a rectangular outlet opening, with the side walls extended rearwardly b... | 08/03/1982 |
| 4290232 | Freight car door locking mechanism A locking mechanism for sliding doors, particularly of railway freight cars, has a hasp pivotally connected to a member defining an edge of the door opening, the pivotal connection being resiliently mounted on the edge defining member so as to keep the ha... | 09/22/1981 |
| 4237083 | Process of manufacturing a microporous sheet material A process of manufacturing a microporous sheet by forming a blend of a polyolefin, silica and a water insoluble plasticizer, forming a sheet from the blend, and contacting the sheet with water for a time sufficient to render the sheet microporous. The pla... | 12/02/1980 |
| 4200208 | Pneumatic hopper gate An outlet gate arrangement for a hopper having sloping side walls converging toward each other and defining between their lower edges a discharge opening communicating with a pneumatic discharge tube comprises a gate having an upper surface abuttingly eng... | 04/29/1980 |
| 4176784 | Dual action control mechanism A thermostatically operated dual action control mechanism for controlling fluid actuatable devices such as the shutter and the fan clutch in the cooling system of a diesel engine in vehicles. A valve rod is provided and movable between first and second po... | 12/04/1979 |
| 4132301 | Fluid actuatable fan clutch with internal caliper action A fluid actuatable fan clutch having an energy absorbing internal caliper action, including a pulley or sheave rotatably mounted on a fixed shaft; an annular friction facing connected to an internal surface of the sheave; a fan blade hub rotatably mounted... | 01/02/1979 |
| 4113927 | Battery separator having coated ribs A battery separator having ribs on at least one side thereof and formed of a sintered resin, the rib tops having a coating thereon consisting of a low-density polyethylene wax.... | 09/12/1978 |
| 4091745 | Cross bar end fitting A universal type of end fitting for securing a freight bracing cross bar or the like, selectively to any of a plurality of different types of belt rails. The end fitting is comprised of a first pair of extending projections that are adapted to be alternat... | 05/30/1978 |
| 4089274 | Bulkhead operating mechanism A freight bracing bulkhead assembly incorporating a suspension system including an inching chain for assisting in movement of the bulkhead assembly along the cargo area. A lever mechanism is provided for detachable connection to the chain for applying a p... | 05/16/1978 |
| 4085685 | End fitting A freight bracing device such as a cross bar embodying an improved end fitting that permits attachment to either of two types of belt rails. In one type of belt rail which has an angular configuration with perforations along the horizontally extending por... | 04/25/1978 |
| 4077332 | Automobile tie down assembly Devices for tying down motor vehicles during transport on a transporting vehicle, such as a railroad car, truck, or the like. Each tie down device includes a winch and a tie down fitting for effecting a detachable connection to the transported vehicle. Wi... | 03/07/1978 |
| 4065052 | Dual action control mechanism A thermostatically operated dual action control mechanism for controlling fluid actuatable devices such as the shutter and the fan clutch in the cooling system of a diesel engine in vehicles. A valve rod is provided and movable between first and second po... | 12/27/1977 |
| 4048755 | Full length door arrangement for railway house car A railway house car side has an elongated opening closed by four doors disposed in end-to-end relation lengthwise of the car with respect to each other, two of the doors, which may be designated end doors, being movable solely lengthwise of the car to unc... | 09/20/1977 |
| 4024323 | Battery separator A battery separator comprising a microporous sheet formed substantially of a mixture of polymeric constituents. One of the polymeric constituents is an ultra high molecular weight polyolefin having a standard load melt index of substantially 0 and an intr... | 05/17/1977 |
| 4020594 | Leverless door mechanism A railway house car plug door includes mechanism for moving the door transversely of the car side wall out of and into closed position and for ensuring that the door locking bars are retracted during such transverse movements, and are in locking position ... | 05/03/1977 |
| 3998484 | Sliding door locking device The invention provides a locking device for railway freight car doors including a wedge-shaped locking pin engageable with the hasp for maintaining the door tightly closed, the wedge being so mounted that it need not be withdrawn from locking position to ... | 12/21/1976 |
| 3989579 | Apparatus for forming envelopes An apparatus for forming envelopes from thermoplastic sheet material including means for feeding said sheets at predetermined intervals along a conveyor means, means for heating the thermoplastic sheet along a narrow transverse zone, means for moving the ... | 11/02/1976 |
| 3967047 | Electrode cooling apparatus An electrode cooling apparatus for an electric furnace which permits easy changing of the electrode holder and water tight seals. The electrode cooling apparatus has a cylindrical body with an inner and outer sealing assembly. The sealing assemblies are e... | 06/29/1976 |
| 3955760 | Thermostatic air valve A thermostatically operated air valve having a valve body, a valve chamber located within the body, a thermal sensor having a push rod extending therefrom into said valve chamber at a first end thereof, a reciprocal valve rod located in the valve chamber ... | 05/11/1976 |
| 3952473 | Universal frame member A universal frame member for use in the easy assembling of frames for cabinet doors, mirrors, pictures, etc. The frame body has a decorative surface or face. The under side of the frame body has a pair of end walls and a pair of side walls extending there... | 04/27/1976 |
| 3939746 | Saw guard A saw guard for a circular saw having a saw blade and a work piece holder which moves relative to the saw blade to cut the work piece, the saw guard being mounted on the leading edge of the work piece holder and having means for moving the saw guard into ... | 02/24/1976 |
