摘要:
A disk made of a first material has a groove in which a blade made of a second material is retained. A strip is placed between the blade and the disk to minimize rubbing damage to the blade and the disk and an insulating material is place between the rub strip and the blade for minimizing damaging responses of the blade to galvanic forces created by rubbing of the first material and the second material.
摘要:
A disk made of a first material has a groove in which a blade made of a second material is retained. A strip is placed between the blade and the disk to minimize rubbing damage to the blade and the disk and an insulating material is place between the rub strip and the blade for minimizing damaging responses of the blade to galvanic forces created by rubbing of the first material and the second material.
摘要:
A method of stripping gamma/gamma prime polycrystalline alloy bond coats from single crystal gamma/gamma prime nickel based superalloys, including the steps of grit blasting followed by the use of hydrochloric acid solutions, followed by rinsing. The cycle may be repeated several times, with visual inspection between cycles.
摘要:
A method of stripping gamma/gamma prime polycrystalline alloy bond coats from single crystal gamma/gamma prime nickel based superalloys, including the steps of grit blasting followed by the use of hydrochloric acid solutions, followed by rinsing. The cycle may be repeated several times, with visual inspection between cycles.
摘要:
A wand with a plurality of ports is provided with vacuum and vibration and with controls therefor. Seeds are drawn to the ports by the vacuum and are singulated by a seed covering a single port. The singulated seeds are each deposited in one of a plurality of plug trays by release of the vacuum and assisted by the vibration of the wand.
摘要:
A swimming pool filter system is comprised of a pump, a filter and a water conduit means for hydraulically connecting the pump and filter in a hydraulic loop with a swimming pool. The filter is a Hayward regenerable filter wherein the diatomaceous earth coating may be periodically shaken off the filter membrane to mix with the dirt and recoat the membrane several times between cleanings to extend the time between filter cleanings. A pressure sensitive switch, mounted at the filter inlet port, closes when the inlet pressure exceeds a predetermined magnitude to energize an alarm each time regeneration is needed or after five regenerations when cleaning will be required.
摘要:
Removing of a casting core from a metal casting leaves at least one opening in a surface of the metal. The opening is filled with a sacrificial material. The metal and sacrificial material are machined at the opening. After the machining, a remainder of the sacrificial material is removed.
摘要:
A seed dispenser is composed of a motor-spatula assembly and a handle. A switch, an adjustable resistor and a battery are enclosed in a hollow of the handle. The motor-spatula assembly includes a V-shaped spatula and an electrical motor elastically mounted to a proximal end of the V-shaped spatula, and the motor is connected via the switch and resistor to the battery. The motor rotor is eccentric so that the rotational center of gravity of the rotor is not exactly co-axial with the axis of the rotor drive shaft, to cause when running a vibration of the motor-spatula assembly at a dominant vibration frequency that is directly proportional to the speed of the rotor. Speed of the motor is adjustable by varying the resistor. The motor-spatula assembly mounted to the handle through a resilient elastomeric gasket, so that a substantial part of the motor vibration energy is transmitted to the spatula and not to the handle. For more effective singulation and enhanced regularity in the dispensing of very small seeds, a series of dremples is formed in the spatula protruding inward toward the trough of the spatula. For large seeds, eccentricity of the rotor may be increased by providing eccentricity of the extending portion of the rotor drive shaft. For more vigorous dispensing of large seeds, the extending eccentric drive shaft may be caused to repeatedly strike a bolt mounted in the motor-spatula assembly.
摘要:
A pipe shaped wand connected to a vacuum pump has at least one port, each port being covered by an air filter and having one end of a quantizing tube attached thereto. When the distal end of the quantizing tube end is held in a bed of fertilizer, insecticide or seed particles, and a vacuum is created, and air is withdrawn from the bed of fertilizer through the quantizing tube to fill the quantizing tube with and to hold the particles until the quantizer-dispenser is moved over a plug tray and the vacuum released to dispense the held quantity of particles into the tray. For automatic operation, a reservoir of particles is connected via a hose to the interior of the quantizing tube and a conventional check valve is connected to the distal end of the quantizing tube so that without moving the quantizer-dispenser each of a series of plug trays may be sequentially moved under the check valve, at which time a vacuum is created to close the check valve. The vacuum fills the quantizing tube(s) and when the vacuum is released, the check valve opens to dispense the held particles. The conventional check valve may be replaced by a length of flexible tube in which case the quantizer-dispenser is moved to bend the flexible tube against a table top to close it before a vacuum is created, and is then moved over a pot where dispensing occurs when the vacuum is released.
摘要:
A particle/seed dispenser is composed of a motor-spatula assembly and a base housing, or handle. The motor-spatula assembly includes two or more V-shaped spatulas and an electrical motor physically connected to a proximal end of each V-shaped spatula, or separate motors are connected to the respective spatulas. The motor rotor(s) is(are) eccentric, namely the rotational center of gravity of the rotor is not exactly co-axial with the axis of the rotor drive shaft so that when running the motor and the motor-spatula assembly vibrate. Successive first, second etc. spatulas extend from the base-housing, each under the previous, the successive spatulas being of increasing length so that particles poured into the first cascade out to the second, and in some cases from there to the third etc. For more effective singulation a series of dremples or rills are formed in the trough of each spatula. The cascading of the particles through successive spatulas provides a substantial improvement in the regularity in the rate of dispensing the particles.