Abstract:
The present device is a movable-louver heating and cooling register. The register is designed to have the same overall dimensions of commercial registers available today. The heating and cooling register has movable louvers installed on pivots that are formed in the register body. Two control arms are used to pivot the groups of louvers. The control arms are mounted on diagonals from each other. Both control arms are attached to a central control shaft, which is designed to rotate about its central axis. Because the control arms are mounted on opposite sides on the diagonal, as the control shaft is rotated, it pulls the two control arms in opposite directions. This causes each set of louvers to move in opposite directions. The advantage of movable louvers is that they can be used with both heating and cooling cycles. To operate the louvers, the control shaft can be turned by hand. Alternatively, a bi-metallic strip, installed around the control shaft, can be used to turn the control shaft depending on the temperature of the air exiting the register.
Abstract:
An improvement in the heating system of the Dehavilland DHC-2 aircraft, which has a heating system for the cabin that uses warm exhaust to heat air for the cabin, is disclosed. A heat exchanger unit is built into the exhaust system. Heat is fed into the cabin by a flexible duct. The heat is controlled from the cabin by of a damper at the duct connection to the exhaust system. The damper is typically mounted in a small heat box at the rear end of the exhaust. The damper is made from a flat rectangular plate that has a small bar welded across the top. This bar acts as a pivot pin that moves the damper to the appropriate position. After several hours of use, the vibration and heat warp the damper and the box. To prevent damage to the heat box and damper, this design adds a set of bearings to the pivot pin. These bearings give lateral and transverse stability and act as miniature shock absorbers. Thus, heating systems using this bearing design can operate up to five times as long before repairs are needed.
Abstract:
A muffler for exhaust systems that feed exhaust into both ends of the muffler can. Exhaust gas enters into the muffler can where it enters an exhaust gas conduit that has a center plug installed. Exhaust is fed into both ends of the exhaust gas conduit. The exhaust gas is then forced out through a number of flared holes in the exhaust gas conduit, where it enters the muffler can and exits through an exhaust port. This design creates a longer exhaust flow path, which allows the exhaust gas to cool, extending the life of the muffler. Moreover, since the gasses are unimpeded in their flow through the conduit until they hit the partition plate, the exhaust conduit is less exposed to the full heat of the exhaust gas, unlike the cones, which do not penetrate deeply into the muffler can and bear the brunt of the exhaust gas.
Abstract:
An improved aircraft muffler and the method of making it is disclosed. It is a plug muffler design having an outer housing and an internal exhaust conduit. The exhaust conduit has a center partition that blocks the flow of exhaust gas through the conduit. A number of holes are formed through the conduit wall such that the exhaust gas passes out through the holes on the inlet side of the partition and reenter the conduit on the outlet side of the partition. Unlike previous designs, the holes formed in the exhaust tube of the muffler are not flat and do not have hoods. Rather they have formed surfaces that slope. The formed surfaces both protrude above and below the exhaust tube wall. Thus the formed surface creates a directional flow path for the airflow to help increase the velocity, which consequently helps to move exhaust gases through the baffle as opposed to straight holes. The indented holes serve another purpose. Those surrounding the center plug act to wedge the plug in place by forming a circumferential, integral bead lock around the partition plate, which secures it in a fixed, stationary position. This, coupled with a series of welds placed around the tube, keeps the plug from falling over or becoming loose within the exhaust tube.
Abstract:
An exhaust that has two isolated baffle systems in one container. This allows the exhaust from one manifold to be muffled and exhausted independently of the other manifold's exhaust. Moreover, the muffler is the same size as existing mufflers, so that it fits into the space of the prior art mufflers. Using two independent muffler elements (baffles and outer covering cans) eliminates all of the problems discussed above and increases the engine horsepower without reducing efficiency. An outer shroud covers the two muffler elements and is also designed to act as a heat exchanger. Fresh air can be pulled through the muffler to be heated for cabin heat and for carburetor heat. The shroud has space around the muffler cans, through which the fresh air passes. Inlet and outlet ports are provided to allow hoses to be connected as needed.
Abstract:
A collector system for exhausts that uses a junction to merge the an engine's primary tubes in a linear arrangement. Thus, all exhaust gas passes cleanly through the unit with no interference or creating any hot spots than can fail. To help remove exhaust gas from the junction portion of the collector, a venturi pipe is installed in the system. This venturi acts to scavenge the junction pipe of any remaining exhaust before the next impulse come through the system. Finally, to eliminate the complex welding of the primary tubes and to guarantee a seal, a tube sheet is used. This tube sheet accepts each of the primary tubes. Each pipe is then welded to the tube sheet, which then fits over the end of the collector junction. The tube sheet is then welded to the junction and the system is sealed.