Abstract: An in-line sight indicator structure for a fluid system wherein a chamber defining flow-through sight housing includes a sight glass in one wall portion thereof and a support member extending from an opposite wall portion in spaced relation to the sight glass to support an indicator element mounted thereon within a fluid stream passed through the chamber, the housing being hermetically sealed from ambient.

Abstract: A field installable device for a conventional heating and air conditioning system (HVAC) is provided which operates a blower fan in conjunction with a standard thermostat. Presently, HVAC systems operate in four modes: heating, cooling, off and fan "on". The device includes a multi-pole, multi-speed motor and a control operatively connected between the thermostat and the motor. With the fan switch in the "on" position and heating or cooling called for, the control causes the blower to operate at a high speed, which may be different for heating or cooling. When the pre-selected temperature is reached the particular thermal operation (i.e., heating or cooling) is stopped. The control switches the motor to a speed substantially slower than the operating condition speed to provide continuing air circulation until the thermostat again calls for thermal operation. With the switch in "auto" position, the blower operates similarly to present systems.

Abstract: An electrical connector pin assembly including at least one conductor pin extending in sealed relation through a housing wall of a chamber and a lead wire connector block having an over-surface wall shield extending from the outer face of the connector block to surround and minimize arcing from a conductor pin end portion extending into the connector block for electrical engagement with a lead wire end.

Abstract: A heating apparatus for heating a fluid medium confined in a hermetically sealed housing chamber including a terminal assembly having a body member sealed in the housing chamber wall with pin means extending in sealed relation therethrough to provide electrically conductive inner and outer pin segments respectively connected to a heat transfer member and an electric power source, the inner pin segment means and heating element being electrically insulated from the housing wall.

Abstract: A current resistive terminal block for connection to outer pin segment means projecting outwardly from a body member of a hermetic terminal assembly sealed in a housing wall, the terminal block including a main channel means to protect the outer pin segment means and diffuse possible leakage from the terminal assembly and subchannel means to encase and secure fused lead end wire connection means for the outer pin segment means.

Abstract: A hermetic terminal assembly for a housing including a fuse-like area positioned in the outer pin segment of a terminal pin extending in sealed relation through the body member of the terminal assembly which body member can be sealed to a housing wall, the fuse-like area in the outer pin segment being covered with a thermally decomposable coating which in the event of decomposition includes an arc suppressant. A pin guard and lead wire end connection securing device is provided to protect the outer pin segment and to secure the lead wire end connection thereto.

Abstract: Apparatus for forming glass to metal hermetic seals in a terminal assembly of a housing part wherein an upwardly directed glass melting heating gradient is applied to a housing part having a glass sleeved terminal pin supportedly disposed in an aperture therein with sufficient heat intensity to flow the glass sleeve in an upwardly direction from bottom to top to fuse the terminal pin in the housing part with minimal voids.

Abstract: A method of forming glass to metal hermetic seals in a terminal assembly of a housing part wherein an upwardly directed glass melting heating gradient is applied to a housing part having a glass sleeved terminal pin supportedly disposed in an aperture therein with sufficient heat intensity to flow the glass sleeve in an upwardly direction from bottom to top to fuse the terminal pin in the housing part with minimal voids.

Abstract: A method of making a safety vent in an hermetically sealed electro-chemical container device and a novel container portion including such safety vent comprising a unique series of steps including printing a preselected area of the container portion with a masking resist pattern having an uncovered planar area of preselected geometric configuration corresponding to a safety vent area for the container portion and etching the uncovered area to a preselected uniform material thickness to provide a safety vent in the container portion capable of withstanding a preselected pressure before profound and instantaneous rupture.

Abstract: A hermetic terminal assembly for a motor unit housing including a cup-shaped body, the bottom of which has a rim and at least one hole defining an annular sealing lip extending in the same direction therefrom through which hole an electrical connection pin extends in sealed relation thereto with the pin insulated by a protective insulating extension sleeve bonded to a sealing insulator, the extension sleeve being formed relative the sealing insulator member and lip extremity to contact the outer periphery of the lip to remove possible sealing insulator cracking to a position removed from the pin.

Abstract: An improved hermetic terminal pin for conducting electrical current including a stop flange and fuse-like and locking groove areas adjacent thereto and a method and apparatus for manufacturing the terminal pin including the steps of feeding a wire material of preselected composition from a storage area to a cutting area and then to a roll forming area, the apparatus including die means to accomplish the roll forming step.

Abstract: A modified terminal pin and end closure structure for the housing of a hermetic terminal assembly and method of manufacturing the same, the structure including an apertured end closure with a peripheral wall surrounding the aperture and extending into the housing with the free end of the wall cooperatively overlapped in aperture sealing relation by a terminal pin carrying eyelet.

Abstract: An improved terminal pin and end closure structure for an hermetic terminal assembly and method of making the same, the structure including an apertured end closure with a peripheral wall surrounding the aperture to extend at preselected angle from the end closure, the aperture being covered by a sealed terminal pin carrying sealing member which is sealed to the extended peripheral wall.

Abstract: A universal seal particularly for use in a lithium battery having a metal end closure, the end closure having a web with parallel planar upper and lower web surfaces and a circular opening in the web, includes an annular eyelet having substantially parallel planar upper and lower surfaces and a central aperture with a terminal pin sealed in the aperture and projecting substantially perpendicularly to the planes of the surfaces. The eyelet has chamfered upper and lower perimetric edges, symmetrically positioned about a plane parallel to and equispaced from the upper and lower surfaces of the eyelet. The eyelet is of a diameter relative to the diameter of the web opening to permit a chamfered edge of the eyelet to engage a sharp arras of the web defining the margin of the web opening in substantially line contact, intermediate the width of the chamfered edge. The closure and eyelet are then joined by a weld between the closure and the eyelet around the meeting line.

Abstract: A method of forming a hermetic seal with high hermeticity includes the steps of subjecting metal components or stock to hot isostatic pressing, forming a pin or body from the stock, and bonding the pin to a surface defining an opening in a hermetic body. A terminal with high hermeticity is provided by a metal component subjected to hot isostatic pressing and a seal bonded to the pin and body. The seal can be a glass to metal seal or ceramic to metal.

Abstract: A hermetic terminal assembly wherein a radially extending flange on a current conducting pin that extends through a hole defined by a cover member adapted to be secured to an opening in a motor housing is surrounded by an electrically insulating sleeve with the inner axial extremity of the sleeve extending at an axial location relative the pin substantially beyond the inner face of the radially extending flange to provide an extended tortuous path between the flange on the pin and the cover member, the pin having a reduced neck portion on the inner end thereof adjacent the inner face of the flange to provide a fuse-like area.

Abstract: A hermetic terminal assembly wherein a radially extending flange on a current conducting pin that extends through a hole defined by a cover member adapted to be secured to an opening in a motor housing is surrounded by an electrically insulating sleeve with the inner axial extremity of the sleeve extending at an axial location relative the pin substantially beyond the inner face of the radially extending flange to provide an extended tortuous path between the flange on the pin and the cover member, the pin having an aperture extending therein on the inner end thereof within the compass of the sleeve, adjacent the inner face of the flange to provide a fuse-like area.

Abstract: Means for continuously shutting-down operation of an enclosed motor-compressor unit upon predetermined contamination of the refrigerant-oil mixture therein by conductive particles which comprises providing a normally open switch in the motor energizing circuit operated to a closed position by a sensitive D.C. relay when energized, in immersing a pair of spaced electrodes in the refrigerant-oil mixture, connecting the electrodes across an A.C. power source, connecting the D.C. relay in parallel with the electrodes across the A.C. power source through rectifying and voltage dropping means and in providing a fusible link in the A.C.

Abstract: Means for continuously shut-down operation of and enclosed motor-compressor unit for refrigeration or heat pump service when the refrigerant-oil mixture therein reaches a predetermined degree of contamination by conductive particles comprises the provision of a normally closed switch in the motor energizing circuit, a relay which when energized opens the switch, in immersing a pair of spaced electrodes in the mixture, in connecting the electrodes and a capacitor in series across a D.C. power source, in connecting a unidirectional solid state switch and the relay in parallel with the electrodes and capacitor and in providing voltage responsive gating means for turning on the switch in response to a predetermined charge on the capacitor, and in the provision of a normally open fusible switch responsive to fuse and close in response to a predetermined high motor temperature and through relay means opens a second normally closed switch in the motor energizing circuit.