Abstract: A plumb bob system for allowing an individual to easily utilize a plumb bob in determining whether a wall is plumb. The plumb bob system includes a pole, an engaging structure attached to an upper end of the pole, a pulley rotatably positioned within the engaging structure, a spool containing a length of string passing about the pulley, and a plumb bob attached to the end of the string opposite of the spool. The engaging structure is comprised of a first member and a second member having a first edge and a second edge respectively. The first edge and second edge have a common length of radius from a center point of the pulley to provide an average upper distance (Z) of the string from the wall. The center of the plumb bob has a distance from the lower portion of the wall (X) that is compared to the upper distance (Z). If the upper distance (Z) and the lower distance (X) are equal then the wall is being constructed plumb and no modifications are required in the construction of the wall.

Abstract: Methods of stimulating and producing multiple stratified hydrocarbon reservoirs having numerous separate reservoir compartments are provided. The methods basically comprise the steps of drilling a first well bore into a lower part of the reservoir having a horizontal portion which intersects a previously drilled second well bore therein. At least one fracture is formed extending into two or more reservoir compartments from the horizontal portion of the third well bore for conducted hydrocarbons in the reservoir into the horizontal portion of the first well bore from where the hydrocarbons flow into the second well bore and are withdrawn.

Abstract: Methods of stimulating and producing multiple stratified hydrocarbon reservoirs having numerous separate reservoir compartments are provided. The methods basically comprise the steps of drilling a first well bore into a lower part of the reservoir having a horizontal portion which intersects a previously drilled second well bore therein. At least one fracture is formed extending into two or more reservoir compartments from the horizontal portion of the first well bore for conducted hydrocarbons in the reservoir into the horizontal portion of the first well bore from where the hydrocarbons flow into the second well bore and are withdrawn.

Abstract: Discrete solder preforms (28, 14a, 14b, 14c) are quickly and accurately placed on substrates (10) to be soldered by means of a foil sheet (24) apertured (26) with the pattern of preform placement. The foil sheet has a vacuum drawn through its apertures, and a number of discrete solder preforms are randomly projected from a vibratory membrane (38) up against the foil to be attached to the foil at each of its apertures. Then the foil sheet with its vacuum attached solder preforms (28, 14a, 14b, 14c) is moved into registration with the flux pattern (12a, 12b, 12c) pre-printed on the substrate (10), and all of the vacuum attached preforms are simultaneously positioned down upon the flux areas of the substrate where they remain when the vacuum is released. Planarity of the thin foil is maintained by a flat somewhat rigid but porous backing member (32) secured to the foil.

Abstract: A high current feedthrough package comprising a plurality of alternating rings respectively comprising a thermally conductive material and an electrically conductive material. The thermally conductive rings comprise a thermally conductive ceramic material such as aluminum nitride, while the electrically conductive rings comprise a material such as molybdenum, or one of its alloys, for example. The package is thus comprised of alternating rings or laminations of aluminum nitride and molybdenum, for example, that are stacked or layered to form a wall. The layered wall is brazed in a single step onto a base. The molybdenum rings act as high current feedthroughs and comprise tabs on the inner and outer perimeter which are available for interconnection to devices disposed within the enclosure and to external circuits. The aluminum nitride rings provide electrical isolation between the feed-through rings.

Abstract: A technique is disclosed for trimming resistors and other passive circuit components buried in hybrid multilayer circuit structures. For example, resistors (13) are formed between two dielectric layers (11, 19) of a hybrid multilayer circuit structure (10). The multilayer circuit structure with the buried resistors is appropriately processed to provide a fired multilayer circuit structure. Trimming of the buried resistors is accomplished with a laser beam that cuts through dielectric material of the fired circuit structure to selectively remove part of the resistive material of the buried resistors. The values of the buried resistors may be tested with conductive elements (15, 17) that are conductively coupled to the buried resistors. The disclosed technique also contemplates the trimming of other buried passive circuit components such as capacitors, and further contemplates the use of other trimming methods such as abrasive, air jet, or water jet trimming.

Abstract: We disclose a process for manufacturing multilayer circuit boards which includes providing a conductive, or an insulating substrate with a conductive pattern thereon, and then transferring and firing a glass-ceramic tape layer to the surface of the substrate. This tape layer provides both electrical isolation between the substrate and electrical conductors or electronic components which are subsequently bonded to or mounted on the top surface of the glass-ceramic tape layer. By providing vertical electrical conductors by means of vias in the tape layer prior to firing the tape layer directly on the substrate, good X and Y lateral dimensionally stability of the tape material is maintained. In addition, a high quality thick film glass-ceramic electrical interconnect structure is achieved at a relatively low manufacturing cost.