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"I watched his countenance closely, to see if he was not deranged ... and I was assured by other senators after he left the room that they had no confidence in it."
U.S. Senator Smith of Indiana ; After seeing Samuel Morse demonstrate the telegraph.
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| Number | Title | Issue Date |
| 6282910 | Indoor blower variable speed drive for reduced airflow An air-handler includes an AC induction motor that drives a blower to move air across a heat exchanger. A switch system selectively determines whether the blower motor operates at its rated full speed or at a reduced speed. For full speed operation, the s... | 09/04/2001 |
| 6269840 | Valve-in-valve body, vent port and method A valve in valve assembly. The assembly comprises a housing having an internal passage, a valve body in the housing and movably operable to control process fluid flow through the passage, and a chamber in the valve body. The chamber is open to the passage... | 08/07/2001 |
| 6270713 | Tip seal for scroll type compressors and manufacturing method therefor A single piece tip seal for use in scroll compressors is produced using a polyetheretherkeytone base material injected into a mold having two ingates to the mold cavity.... | 08/07/2001 |
| 6266964 | Use of electronic expansion valve to maintain minimum oil flow A method of controlling an expansion valve including the steps of: measuring a primary system condition; determining an error in the primary system condition; measuring a secondary system condition; determining an error in the secondary system condition; ... | 07/31/2001 |
| 6260373 | Heat exchanger with double vibration isolation A heat exchanger within a sheet metal enclosure includes mounting structure that provides double vibration isolation to minimize noise. The mounting structure includes at least one resilient vibration isolator that couples the heat exchanger to a vibratio... | 07/17/2001 |
| 6260374 | Easily installable field configurable air conditioning unit An air conditioning unit. The unit comprises a housing having a first side, a second side, a return air end wall, a supply air end wall, a return air interior, a supply air interior and a heat exchange coil operably connected to the first and second sides... | 07/17/2001 |
| 6257870 | Gas furnace with variable speed draft inducer A method of controlling a variable speed draft inducer motor and fan in a gas furnace. The method comprises the steps of: detecting a first fault driving the motor to a maximum operating range; detecting a second fault forcing the motor to operate towards... | 07/10/2001 |
| 6254354 | Enhanced suction gas management in a refrigeration compressor A hermetic reciprocating compressor employs a motor end cap through which suction gas passes in heat exchange contact with the compressor drive motor enroute to the compressor. The end cap has a suction gas aperture and employs apparatus for preventing th... | 07/03/2001 |
| 6250102 | Oil and refrigerant pump for centrifugal chiller In a preferred embodiment, a single motor drives both oil and refrigerant pumps in a refrigeration chiller, the motor and oil pump being disposed in the chiller's oil supply tank and the refrigerant pump being disposed exterior thereof. The refrigerant pu... | 06/26/2001 |
| 6250101 | Oil and refrigerant pump for centrifugal chiller In a preferred embodiment, a single motor drives both oil and refrigerant pumps in a refrigeration chiller, the motor and oil pump being disposed in the chiller's oil supply tank and the refrigerant pump being disposed exterior thereof. The refrigerant pu... | 06/26/2001 |
| 6247921 | Apparatus for generating a spark An apparatus for generating a spark, particularly for igniting the gas in a gas appliance. The apparatus includes a spark generator adjacent to a combustible gas burner. The spark generator consists of at least two spark electrodes connected to a high vol... | 06/19/2001 |
| 6233967 | Refrigeration chiller oil recovery employing high pressure oil as eductor motive fluid A refrigeration chiller makes use of the flow of oil from an oil sump location to the chiller's compressor to power an eductor to return oil which has made its way to the evaporator of the chiller system from the evaporator to the compressor.... | 05/22/2001 |
| 6206653 | Internal oil filter element for refrigeration compressor A refrigeration unit having a compressor that includes a cast member, a cavity formed in the cast member, and an oil filter element dividing the cavity into an inlet cavity and an outlet cavity. An inlet port for directing the unfiltered oil into the inle... | 03/27/2001 |
| 6199399 | Bi-directional refrigerant expansion and metering valve A bi-directional refrigerant metering and expansion valve. The bi-directional valve comprises a body; a short tube portion in the body, a heating inlet portion and a cooling inlet portion. The short tube portion includes a tubular portion having a short t... | 03/13/2001 |
| 6185954 | Tangential fan scroll and discharged diffuser design An air conditioning unit comprising: a housing having a first half and a second half; the first half of the housing containing an indoor heat exchange coil and a blower moving air through said coil from at least a housing inlet to a housing outlet. The bl... | 02/13/2001 |
| 6176092 | Oil-free liquid chiller A refrigeration chiller employs a centrifugal compressor the impellers of which are mounted on a shaft which is itself mounted for rotation using rolling element bearings lubricated only by the refrigerant which constitutes the working fluid of the chille... | 01/23/2001 |
| 6170271 | Sizing and control of fresh air dehumidification unit A fresh air unit. The unit comprises: a housing having an airstream flowing therethrough; a pre-cooling portion, and dehumidification portion. The pre-cooling portion is located within the housing and reduces the temperature and specific humidity of a gas... | 01/09/2001 |
| 6167713 | Falling film evaporator having two-phase distribution system Efficient two-phase refrigerant mixture distribution is accomplished in a falling film evaporator by use of a refrigerant distributor disposed internal of the evaporator shell which overlies the evaporator tube bundle and which internally causes said two-... | 01/02/2001 |
| 6161395 | Liquid level sensor A sensor system. The system comprises a binary sensor issuing a signal representative of a first or second condition; sampling circuitry, operatively connected to the binary sensor, for monitoring the number of transitions between the first and second con... | 12/19/2000 |
| 6141979 | Dual heat exchanger wheels with variable speed A refrigeration system includes a cooling coil and two variable speed heat exchanger wheels (an enthalpy wheel and a sensible wheel) whose rotational speeds are adjusted to control the humidity and temperature of a comfort zone as well as limit the minimu... | 11/07/2000 |
| 6135744 | Piston unloader arrangement for screw compressors A screw compressor employs a piston unloader disposed in a bore remote from the compressor's working chamber. Flow communication between the bore and working chamber is through a series of unloader ports. The unloader piston has an end portion of uniform ... | 10/24/2000 |
| 6131471 | Liquid level sensor A sensor system. The system comprises a binary sensor issuing a signal representative of a first or second condition; sampling circuitry, operatively connected to the binary sensor, for monitoring the number of transitions between the first and second con... | 10/17/2000 |
| 6134120 | Low profile circuit board mounting arrangement A board mount assembly. The assembly comprises a panel, a board mount and a circuit board. The panel is generally arranged in a plane. The board mount has an attachment portion operably connected to the panel and parallel thereto, and has a support portio... | 10/17/2000 |
| 6126422 | Tip seal for scroll type compressor and manufacturing method therefor A single piece tip seal for use in scroll compressors is produced using a polyetheretherkeytone base material injected into a mold having two ingates to the mold cavity.... | 10/03/2000 |
| 6122923 | Charge control for a fresh air refrigeration system A refrigeration system comprising: a duct; a compressor having an inlet and an outlet; a reheat coil located in the duct and having an outlet and an inlet operatively connected to the compressor outlet; and a condenser having an outlet, and an inlet opera... | 09/26/2000 |
| 6116046 | Refrigeration chiller with assured start-up lubricant supply An assured supply of lubricant to the compressor in a refrigeration chiller is provided by a reservoir that is connected in parallel with the main line by which lubricant is supplied to the compressor. The reservoir is connected to the main lubricant supp... | 09/12/2000 |
| 6112536 | Convertible condensate drain pan A condensate drain pan. The drain pan comprises a frame supporting a surface; a side outlet in the frame proximal a high point; and a bottom outlet in the surface proximal a low point. The surface is sloped so that the first side drains to the side outlet... | 09/05/2000 |
| 6098422 | Oil and refrigerant pump for centrifugal chiller In a preferred embodiment, a single motor drives both oil and refrigerant pumps in a refrigeration chiller, the motor and oil pump being disposed in the chiller's oil supply tank and the refrigerant pump being disposed exterior thereof. The refrigerant pu... | 08/08/2000 |
| 6089031 | Method and apparatus of compressor height and alignment adjustment A method of mounting a compressor above a heat exchanger. The method comprises the steps of: attaching a transfer device to the exterior of the heat exchanger where the transfer device has a lower arc surface and an upper sloped surface; positioning the c... | 07/18/2000 |
| 6085532 | Chiller capacity control with variable chilled water flow compensation A method of controlling chiller capacity in a chiller system. The method comprises the steps of: measuring entering the fluid temperature of a fluid entering a heat exchanger; measuring the fluid temperature of the fluid leaving the heat exchanger; determ... | 07/11/2000 |
| 6068048 | Wire harness retainer for spine fin air conditioning coils A wire retainer for use in an air conditioning outdoor cabinet which houses a fan and a spine fin heat exchanger coil includes an extension portion, a base portion and a clip portion. The extension portion of the wire retainer is anchor-like and includes ... | 05/30/2000 |
| 6068457 | Lobed pinion drive shaft for refrigeration compressor A refrigeration unit having a compressor includes a refrigerant gas inlet, a drive shaft, and at least one compression stage. At least one compression stage includes at least one impeller with a hub, the hub having a radially lobed bore. The drive shaft h... | 05/30/2000 |
| 6066194 | Electronic room air cleaner with variable speed motor An apparatus and method for using a programmable variable speed motor to indicate a clogged filter while providing a constant airflow acrcss a wide range of restrictions. A motor has speed and airflow parameters and a built-in constant airflow regulator. ... | 05/23/2000 |
| 6065297 | Liquid chiller with enhanced motor cooling and lubrication An enhanced motor cooling and lubrication system for a liquid chiller includes a liquid refrigerant cooled compressor drive motor, wherein the refrigerant used to cool the drive motor is returned to the chiller's condenser, and apparatus to better facilit... | 05/23/2000 |
| 6065948 | Discharge check valve in a scroll compressor A scroll compressor has a discharge check valve assembly comprised of a valve and a valve cage. The valve is maintained open within the assembly by the flow of discharge gas from the scroll set during the normal course of compressor operation and is essen... | 05/23/2000 |
| 6050098 | Use of electronic expansion valve to maintain minimum oil flow A method of controlling an expansion valve including the steps of: measuring a primary system condition; determining an error in the primary system condition; measuring a secondary system condition; determining an error in the secondary system condition; ... | 04/18/2000 |
| 6049299 | Dithering an analog signal to improve measurement A method of measurement. The method comprises the steps of (a) measuring a value, (b) forwarding the measured value as an analog signal, (c) dithering the analog signal to improve resolution and (d) converting the analog signal to a digital signal.... | 04/11/2000 |
| 6035963 | Refrigeration compressor having an asymmetrical housing for noise suppression An upper housing shell of a hermetically sealed refrigeration compressor has a central asymmetrical section interposed between a lower cylindrical section and an upper spherical section. The shape of the central section is such that opposite points define... | 03/14/2000 |
| 6035651 | Start-up method and apparatus in refrigeration chillers The existence of inverted start conditions in a refrigeration chiller is accurately identified by sensing the liquid level in the chiller evaporator. That liquid level is indicative of the location of the chiller's refrigerant charge at start-up. If the s... | 03/14/2000 |
| 6018962 | Centrifugal compressor oil sump demister apparatus A refrigeration apparatus contains an oil sump having an interior portion. A housing is located, at least in part, within the oil sump interior. The housing has at least one inlet and at least one outlet. The inlet allows a vent gas stream to enter the ho... | 02/01/2000 |
