Abstract: The present device is a light transmission probe which is designed to transmit light through a fluid, which is held by a tank or in a pipe or the like. By analyzing the change in amplitude and/or frequency of the light transmitted, certain parameters of the fluid can be determined. The present light transmission probe, in a preferred embodiment, includes a sapphire rod or window as the light conducting medium. Further, in a preferred embodiment, the sapphire rod has a layer of titanium molymanganese metallized to its lengthwise surface and the metallized larger is fused to the inside cylindrical aperture of a stainless steel housing. The combination just described provides a probe which does not react to the presence of chemicals normally used in the chemical industry and can withstand relatively high pressures and relatively high temperatures.
Abstract: The present arrangement provides for having the plenum divided into at least two sections. One section dumps quench gas from a first direction into the hot zone chamber during a first period and the other section dumps quench gas into the hot zone from an opposite direction during a second period whereby the cooling is relatively uniform. During the quenching operation the quenching gas is drawn from the hot zone chamber through a heat exchange and is returned therefrom to a loop through the hot zone chamber in touch with the workpiece. Direction flow gates control the alternate use of the two plenum.
Abstract: The present device, in a preferred embodiment, is a flexible plastic strip which is formed to be substantially in the shape of the letter L. The flexible plastic strip is shaped so that it can sit on the rabbet of a frame which displays art, such as a picture frame. The plastic strip is secured to the inside wall and the ledge of the wooden frame so that moisture and/or tiny life forms, such as tiny insects or larvae, which normally reside in the wooden frame cannot penetrate the seal and do damage to the art work. The plastic strip is flexible so that it can be cut and used with any shape of wooden frame such as an oval shaped frame, a rectangularly shaped frame, or the like.
Abstract: The feedthrough device includes first and second half housing members, each of which has an internal chamber. The feedthrough device further includes a removable header member that fits within the chambers of the first and second half housing members when they are threaded together. The first half housing member has a threaded protrusion which fits into a threaded aperture located in the wall of a sealed structure, such as the wall of a vacuum furnace. The threaded protrusion arrangement includes a first "O" ring which seals the periphery of the aperture in the wall of the sealed structure. The header has first connectable terminals on one end and second connectable terminals on the other end. In between the first and second connectable terminals of the header there is located a plate member which fits along the edge of the first half housing member chamber; and located between that edge and the plate is a second "O" ring.
Abstract: Surgical apparatus which includes a waveguide, for example an optical fibre, through which laser energy is applied to tissues for such purposes as ablation of atheroma, destruction of calculi and lithotripsy. The optical fiber is provided with an end-piece through which it passes, and terminates flush with the distal end in the end-piece. For various applications at least the tip of the end-piece may be made either highly reflective or highly absorptive of the laser radiation. A balloon catheter may be fitted over the optical fibre. The end-piece may be provided with sensing means.
Abstract: The present system includes a bridge circuit (with four legs) with one leg including a heating element. The mid-points of the bridge circuit are connected to a silicon controlled rectifier (SCR) which is further connected to the control element of a monostable multivibrator. Further connected to the power input elements of the monostable multivibrator is a D.C. power source. The monostable multivibrator is connected to a transistor which has a light emitting diode (LED) in its cathode circuit. The LED is part of a circuit which further includes a light sensitive triac. The light sensitive triac is further connected through a pulse generating circuit to the control element to a second triac which in turn is connected to supply heavy electrical current to the heating element.
Abstract: The present arrangement includes a plurality of graphite support assemblies which serve to hold graphite heating elements of a graphite hot zone to be used with a vacuum furnace. Each of the support assemblies is designed to employ graphite bolts. Laminated graphite washers are located between the bolts and the graphite heating elements and between the graphite heating elements and the support assemblies so that the bolts do not loosen in response to cycles of hot and cold temperatures.
Abstract: The present device is an electrical resistor component which includes a cylindrical substrate of non-electrical conducting material. A meandering path (strongly resembling a plurality of hairpins laid end to end) of electrical conducting (but at the same time resistant to electrical current) material is secured substantially around the length dimension surface of the cylindrical substrate. The meandering path is arranged so that there is separation area of the cylindrical substrate surface which separates the turn around bends of the path which face each other. This last mentioned area has a limited amount of electrical conducting material located therein. In the separation area there are included connecting deposits of the electrical conducting material which are connected to the turnaround bends. The connecting deposits serve to provide parallel paths and thus initially reduce the electrical resistance value of the overall electrical resistor component.
May 18, 1988
Date of Patent:
August 22, 1989
EBG Elektronische Bauelement Gesellschaft m.b.H.
Abstract: The present arrangement includes a plurality of graphite support assemblies which serve to hold graphite heating elements of a graphite hot zone to be used with a vacuum furnace. The support assembly used with the power terminal end of the heating element chain is designed to be clamped onto a standard molybdenum electrically energizable rod, while each of the support assemblies is designed to employ graphite bolts with carefully selected laminated graphite washers so that the bolts do not loosen in response to cycles of hot and cold temperatures.
Abstract: The present device comprises an enclosing structure for a vacuum furnace hot zone. The enclosing structure, in a preferred embodiment, includes an outside wall (usually fabricated from stainless steel), and inside wall (usually fabricated from laminated graphite sheets) and layers of graphite felt located between the outside wall and the inside wall. The graphite felt is "cut back" so as to be shorter than both the outside wall and the inside wall, thereby creating a channel around the end of the enclosing structure. The present device further includes insert structure inserted into the channel and the insert structure comprises a backing of heat insulating rigidized material as well as a bonded front strip, in a preferred embodiment, fabricated from laminated graphite sheets. The insert seals and prevents any particles, emanating from the layers of loose fibered blanket of insulating material, from entering the hot zone, or other sections of the furnace, to contaminate the same.
Abstract: The present device includes a bridge circuit with a first intermediate terminal and a second intermediate terminal and with one leg of the bridge circuit being a heating element. Connected across the power lines of the bridge circuit is a main bidirectional switching circuit (having a gate element) which is turned on bidirectionally by control signals developed by an R-C circuit connected to the gate element. The resistors of the R-C circuit are for the most part integral components of two photoconductor isolator devices. These last mentioned resistors provide a low resistance after their associated LED's are turned on and the one of them whose associated LED turns off at the zero crossover remains at a low resistance value for a period of time after its associated LED's has turned off. In addition the present device includes a circuit to bypass the control signal which ordinarily would go to the main capacitor of the R-C circuit in the event that an overcurrent situation (e.g.
Abstract: The present arrangement includes a plurality of support members each having a slot therein and wherein each slot is substantially equal to the thickness of a viewing member (an overlay piece). The viewing member is formed to not reflect light, that is to have a light anti-relection characteristic and is disposed between a viewer and the item to be viewed. The support members are slipped slotwise over the edges of the overlay piece and provide supports to hold the overlay piece on the item to be viewed and permit removable therefrom without interfering with the view of the item to be viewed. In one embodiment the overlay member is movably mounted through the support members.
Abstract: The present loading grid assembly includes a plurality of support bars which are held together by assembly support rods which lie orthogonal thereto. The assembly support rods are terminated in end blocks which have grooves formed therein and which are formed to be substantially symmetrical about the assemby support rods. Accordingly, the assembly can be turned over so that any sag which results from a load is reversed thereby providing wear on the upper and lower sides of the assembly. In addition, the present device includes post guides, spacer blocks, stacking posts and interlocking members. The post guides fit into the grooves of the end blocks and into grooves of the stacking posts to provide a support means for a second tier of support bars. The spacer blocks fit over the assembly support rods to define a changeable separation between adjacent support bars while the interlocking members securely separate adjacent bars and provide further vertical support to an assembly.
Abstract: The present apparatus includes a rotating table which is loaded with removable carriers, each of which holds a substrate to be coated. The carriers are advanced to a loading position and are pushed from the table thereat into a hollow cylinder. Each carrier has a pair of O-rings on its periphery which are squeezed against the inside surface of the cylinder to effect a double seal. Each carrier pushes the carrier ahead of it up through the cylinder in a train like fashion. Along the cylinder there are vacuum stations which act to pump down and degas the substrates. Apertures are provided in the vacuum stations and these apertures are formed to permit the O-rings to expand as the carriers pass by the apertures without causing the O-rings to be cut or scored. Within a vacuum chamber there is included a vapor trap which helps remove water vapor from the substrates during the degassing operation.
Abstract: The present device is an overlay member, such as a glass piece, which permits a viewer to see, for instance a work of art, without being distracted by reflected images emanating from the overlay or glass surface. The present overlay has a base member having rough surfaces on both sides and has a coating, or plurality of layers of anti-reflection material such as silicon dioxide and titanium dioxide, which is arranged to reduce image reflection, from the surface, by light interference. The rough surfaces of the base member substantially disperse the reflecting light, which does occur after the reduction by the anti-reflection coating, so that the viewer sees no image reflection.
Abstract: The present arrangement includes a central housing member which has a hollow chamber therein and which has at least two apertures passing from the outside wall into the internal hollow chamber. The apertures are disposed, or positioned, so that their axes are at an angle of less than 180.degree. to each other and in a preferred embodiment are at right angles to each other. The walls of the apertures are formed to be connectable. In the preferred embodiment one of the aperture walls is threaded internally to accept an externally threaded cable connector piece while the other aperture wall is formed into an externally threaded protrusion thereby enabling an internally threaded cable connector piece to be threaded onto the externally threaded protrusion. The cable connector pieces are designed to be secured to a cable and thus the entire cable connector assembly is secured to a cable which cable is positioned to define a right angle (or other angle) path.
Abstract: The present arrangement includes a support member which is formed to: (1) have tines extending from one end; and (2) have a threaded section lying adjacent to the beginning of the tines. In addition the present arrangement in the preferred embodiment includes a rubberized cone shaped insert which has an aperture therethrough and which enables a great number of different sized cables to be clamped. Further in addition there is included a compression nut which is internally threaded in one section, which is shaped internally concave in another section (and which has an aperture therethrough), and which is threaded onto said support member. Such threading action causes the tines to be bent inward toward one another and simultaneously to pass through the aperture of the compression nut. The tines are serrated on their respective inner surfaces and as they are bent toward each other they come in contact with the rubberized insert and act to clamp thereon which in turn secures the support member to a cable jacket.
Abstract: The present arrangement is a hot zone structure for a vacuum furnace which includes an endlessly shaped outside wall (e.g. shaped substantially into a circle) preferably made of stainless steel. Disposed next to the inside surface of the outside wall is a layer or layers of heat insulating material means such as graphite felt. Further disposed next to the inside surface of the insulating material means is an inside wall preferably made of graphite. The inside wall defines the chamber of the hot zone structure into which items to be heat treated are placed. Passing through the outside wall, through the layer of heat insulating material, and through the inside wall are many continuous apertures. At the end of each continuous aperture there is located a threaded terminal piece and threaded into each terminal piece is a graphite nozzle. Accordingly there is a plurality of graphite nozzles passing from outside the outside wall of the hot zone structure through into the inside chamber of the hot zone structure.
Abstract: The present arrangement includes a plurality of hearth support members. In the preferred embodiment each hearth support member is located to pass through the wall of a vacuum furnace housing and on into the hot zone thereof. Each hearth support member includes a hollow stainless steel tube which is secured at its bottom end to a brass base member. At the top end of each hollow support member there is located an electrically conducting adapter which is formed to supportively engage with the hearth. Within each hollow support member a ceramic encapsulated thermocouple is located with the ceramic encapsulating member running the length of the metallic hollow support member and the lead wires to the thermocouple protruding therefrom.
Abstract: The present invention is used to heat seal seams, and the like, of item holding means such as plastic bags holding loose fill product like beans, hard candy, pretzels, potato chips, etc. The heating station of the present invention has at least two independently controlled heating positions in each half of a pair of jaws and each heating position is heat insulated from the other and each respectively can provide different amounts of heat to material coming in contact therewith. Accordingly, the bonded areas of item holding means can be manipulated to control local package characteristics, i.e., sealed to have a stronger bond strength at one location that at another location, adjust tear properties to suit marketing methods (such as hole punched top seals) and to control seal integrity.