Method and apparatus for accurate positioning of a moveable member such as a robot arm or the like. An encoder or other position sensing means on the robot is used to control positioning of the robot into a desired position. However, because of inaccuracies such as those built up by utilizing a plurality of position sensors or those occasioned by bending, etc., the robot arm, gripper or the like m...

A dynamic MOS random-access memory is described which includes a circuit for permitting checking of the on chip refresh counter. The memory also includes a refresh generator, the frequency of which automatically varies to compensate for temperature variations. Other innovations include an arbitration circuit, a hidden refresh function and unique accessing of redundant lines.

A method is disclosed for insuring that two semiconductor chips which have a 1-bit defect at the same chip address are not paired at any memory address by a fault alignment exclusion mechanism (FAEM) which functions to position chips having defects at different memory addresses. The FAEM employs an error map to determine which chips must be realigned in their respective columns and an address perm...

Derivatives of C-076 compounds are described in which the C-076 molecule, a series of macrolides, has the 23-hydroxy group thereof oxidized to the 23-keto group. The 23-keto compounds are prepared by selectively oxidizing the suitably protected 23hydroxy compound using such oxidizing agents as pyridinium dichromate, chromic acid-dimethyl pyrazole, chromic acid, chromic acid-acetic acid, and the li...

PCT No. PCT/SE80/00346 Sec. 371 Date Aug. 20, 1981 Sec. 102(e) Date Aug. 20, 1981 PCT Filed Dec. 22, 1980 PCT Pub. No. WO81/01803 PCT Pub. Date Jul. 9, 1981.A substantially constant viscosity of the liquid mixture at a given temperature is maintained in mixing two liquids with different viscosities, especially diesel oil and heavy fuel oil for supply to an engine. The liquid mixture constantly bei...

Apparatus for making plastic screen panels, and especially abrasion-resistant mining screens, includes a large rotary screen drum member on which an extruded, profiled cross-section screen surface-forming wire is helically wound at a pitch which will produce the desired screen slot width. Immediately adjacent the drum member is a rod-positioning mechanism from which a plurality of screen panel sup...

The adhesion of fibrous polymeric aromatic amide reinforcing material to rubber stock is improved by treating the fibrous material with an aliphatic sulfonylazide having the general formula R(Cl)x(SO2N3)y, where R is an aliphatic or cycloaliphatic hydrocarbon radical containing at least 5 carbon atoms, y is from about 1 to about 4 and x is from 0 up to about 2y; heating the treated fibrous materia...

1445593 Hydrocarbon conversion catalyst SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ BV 24 Aug 1973 [25 Aug 1972] 40167/73 Addition to 1337752 Heading BIE [Also in Divisions Cl and C5] Zeolite prepared according to the process of the main invention is heat-treated, at least for the first time so that the atmosphere surrounding it satisfies the relationship -0.05T+ 30#PH 2 O #-0.05T+70 where T is the...

A self-restoring fender panel for a reusable impact attenuation device is provided. Buffer elements are positioned in an ordered array extending forwardly of a rigid backing member adjacent to a fixed structure. Diaphragm members are interposed in the array and extend laterally outward of the array at fixed intervals. Fender panels are pivotally coupled to laterally extending ends of the diaphragm...

A process is disclosed for the conversion of carbon monoxide in sour synthesis gas mixtures in the presence of a catalyst which is active in the presence of sulfur compounds. The catalyst comprises known sulfactive metal oxides or sulfides supported on a shaped carrier. The catalytically active oxides or sulfides are doubly promoted with an alkali metal compound and an oxide or sulfide of manganes...

SASH BALANCE FOOT SEAL MECHANISM There is provided a foot seal member for sealing the space between each side of a window sash and the adjacent window jamb or jamb liner in a window that includes a sash balance mechanism. The foot seal member is engageable by the sash balance mechanism and includes a body of resilient material that is carried by the sash and which is shaped to seal the space betwe...

A hand held power driven skinning device includes a housing having a handle connected thereto and having a blade assembly mounted thereon. A driven tooth roll assembly is provided with a shaft that is journaled on the housing. A clean-out bar assembly is mounted in the housing and engages the tooth roll assembly. A retainer element on the blade assembly and a locking element on the shaft for the t...

An apparatus and method for recording optically an information signal on a disk-like record medium as a spiral track or concentrical tracks by modulating a main beam by the information signal to be recorded and projecting the modulated main beam onto the record medium. In order to obtain a tracking error signal, a sub beam is also projected on the record medium at an edge of an adjacent track whic...

A mandibular electromyograph having a plurality of electrodes adapted to generate electromyograph signals indicative of masticatory muscle potentials. The electrodes are selectively connected to a preamplifier by a multiplexer circuit. The preamplifier also generates and applies to an electromyograph preamplifer channel a 60 Hz test signal generated by amplifying the output of an antenna by a 60 H...

The present invention relates to a process for the treatment of a hydrocarbon charge by high temperature ultrafiltration, said process comprising the steps of circulating said charge in a module comprising at least one mineral ultrafiltration barrier coated with a sensitive mineral layer of at least one metal oxide and of operating at a temperature higher than 100.degree.C. The barrier, which pref...

The invention provides an absorbent panel which consists of a paper, film or fabric substrate coated on at least one surface with a reactive composition containing from 10 to 40 parts by weight of a liquid polyhydroxy organic compound and from 90 to 60 parts by weight of a particulate water-insoluble, water-swellable absorbent polymer having a gel capacity of at least 10. The absorbent panel is ca...

A lawn which includes a mower housing carrying a motor and including plural shafts carrying donut-like members with cutters attached thereto. The deck includes a forward portion have a protective skirt, a portion of which extends at approximately 45 DEG to the ground.

A method for making an airtight seal between a pair of insulator elements, such as glass plates, without destroying any fine structure etched in the insulator elements. A thin metal film is deposited on one of the elements to be sealed and then placed in intimate contact with the other element to be sealed. The elements are then heated to a temperature well below their softening point, but high en...