Patents Represented by Attorney William E. Cleaver
  • Patent number: 4733631
    Abstract: The present apparatus has a movable table with apertures therein. In each aperture there is loaded a carrier device and each carrier holds a substrate to be coated. The carriers are advanced in a step-like fashion to a loading position under a vertical hollow cylinder. When a carrier is in the loading position, a piston is moved upward, passing through the aperture, pushing the carrier into the hollow cylinder. Each carrier has an O-ring on its periphery and the O-ring is squeezed against the cylinder wall to form a seal. Each carrier pushes against the one above it to advance a column of carriers upward in the hollow cylinder. In this way, the carriers, and the substrates they hold, pass through the hollow cylinder. Along the cylinder there are vacuum stations which act to pump down and degas the substrates. The degassed substrates eventually emerge from the upper end of the cylinder into a vacuum chamber, whereat they are coated by sputtering, or the like.
    Type: Grant
    Filed: September 30, 1986
    Date of Patent: March 29, 1988
    Assignee: Denton Vacuum, Inc.
    Inventors: David Boyarsky, Robert T. Vaughan
  • Patent number: 4720913
    Abstract: The present system for joining tape leaders is comprised of an elongated member which has a finger like protrusion and a cam protrusion both of which are disposed close to one end thereof. The elongated member has an elongated slot at one end which fits over a stud and is further rotationally coupled to a crank so that the elongated member can pivot around said stud in a number of different positions in response to the crank being moved. The crank is rotationally coupled to a cam follower and the crank is further arranged to rotate about a stud.
    Type: Grant
    Filed: January 31, 1986
    Date of Patent: January 26, 1988
    Assignee: Digital Equipment Corporation
    Inventor: Friedrich R. Hertrich
  • Patent number: 4716340
    Abstract: In the present device the lower section is an external plasma gun which acts as a source of ionized gas. The upper section of the device is a magnetron which has a plasma chamber and which includes both a source of magnetic flux as well as the apparatus necessary to generate an electrostatic field so that within the plasma chamber of the magnetron there are EXB forces. The magnetron is supported in close proximity to, and is electrically insulated from, the external plasma gun. The above arrangement permits the magnetron to produce and maintain a plasma phenomenon with a very low pressure of gas (of the order of one millitorr to two tenths of a millitorr) in the vacuum chamber.
    Type: Grant
    Filed: December 10, 1985
    Date of Patent: December 29, 1987
    Assignee: Denton Vacuum Inc
    Inventors: Kon J. Lee, Anthony Musset
  • Patent number: 4710283
    Abstract: The present device comprises, in a preferred embodiment, a permanent magnet assembly which is formed to closely resemble a doughnut with the inside surface defining an aperture having first and second ends. Said inside surface is formed concave to substantially resemble the letter "C", or a mirror image letter "C". The permanent magnet provides magnetic flux from one end of the "C" to the other and hence the magnetic flux lines, or the magnetic flux field, form, in conjunction with the concave letter "C" configuration of the permanent magnet, an enclosure. Within the enclosure there is located an anode, and the anode is shielded from electrons by the magnetic flux field. In one embodiment, in close proximity to the second end of said aperture of the permanent magnet piece there is located a cathode, while at said first end of the aperture there is located a screen. In another embodiment, which is used for sputtering, there is no screen employed.
    Type: Grant
    Filed: January 30, 1984
    Date of Patent: December 1, 1987
    Assignee: Denton Vacuum Inc.
    Inventors: Bawa Singh, Peter R. Denton
  • Patent number: 4695351
    Abstract: The present technique involves the procedure of depositing magnetic material onto a substrate while subjecting the magnetic material, as it is deposited onto the substrate, to a magnetic bias field whose Oersted value is sufficient to substantially saturate the surface of the magnetic material in order to induce a state of uniaxial anisotropy.
    Type: Grant
    Filed: July 10, 1986
    Date of Patent: September 22, 1987
    Assignee: Digital Equipment Corporation
    Inventor: Michael L. Mallary
  • Patent number: 4691199
    Abstract: The present system includes an optical reflective sensor, which is hand held and moved over a color density scaled grid, such as a gray scale grid, to produce analog signals which, when processed, become the basis for the direction of movement of a screen cursor. The analog signals are converted into binary coded signals and further into hexadecimal signals. Each hexadecimal signal is transmitted to eight AND gates whose other inputs represent a (gray scaled) value of a position from where the sensor could have been moved. Accordingly only one AND gate will produce an output signal and that output signal will only be produced if the move is a valid, or acceptable, move. If the sensor has been validly moved, the output signal of the selected AND gate will be interpreted (circuit-wise) to represent one of the directions of a compass. The output signal will be used to change the state of a bit map memory to thus move the screen cursor. Hence the screen cursor will follow the sensor.
    Type: Grant
    Filed: March 5, 1985
    Date of Patent: September 1, 1987
    Assignee: Digital Equipment Corporation
    Inventor: Stanley Shell
  • Patent number: 4689765
    Abstract: Address circuitry generates groups of tag signals, and each group is associated with a data word in a data processing device. A portion of the tag signals defines an addressable location in a storage device and another portion of the tag signals defines an operational identification of its associated data word. As data words (i.e., instruction words, operands, etc.) are fetched from memory they are decoded, if necessary, or made ready, (for use by the circuitry which executes the operations intended for such instructions, operands, etc.), and are stored in a multi-plane set of buffers. Each of said buffers has a plurality of address locations, corresponding to the address locations defined by said first portions of said tag signals, and each of said planes is selectable by said other portions of said tag signals.
    Type: Grant
    Filed: January 28, 1983
    Date of Patent: August 25, 1987
    Assignee: Digital Equipment Corporation
    Inventor: Donald F. Hooper
  • Patent number: 4688482
    Abstract: The present device comprises a plurality of doctor blades, each of which, in a preferred embodiment, has a width of a key zone. Each of the blades is disposed to be moved between the fountain roller of a printing press and the receiver roller of a roller train in the printing press. Each doctor blade is held by some force such as a solenoid in a first position whereat it scrapes away ink from the fountain roller for a predetermined time, so that the amount of ink lifted from the fountain roller is predictable which at the same time the system provides for changing the predetermined time to enable the amount of ink removed from the fountain roller to be varied. Each of the doctor blades is returned to a second position when the force is terminated, whereat each of the doctor blades comes in contact with a receiver roller which acts to wipe the ink from the respective doctor blades thus completing the transfer of ink from the fountain roller to the receiver roller of the roller train of a printing press.
    Type: Grant
    Filed: January 31, 1986
    Date of Patent: August 25, 1987
    Inventor: Philip E. Tobias
  • Patent number: 4670855
    Abstract: The present structure is an interchangeable interface circuit card which per se includes: circuitry which is responsive to being addressed in accordance with its physical location; circuitry to generate signals which identify the circuit being addressed and the peripheral to which it is connected; and circuitry to generate signals which effect a diagnostic routine applicable to at least some of the interchangeable interface circuits on the circuit card being addressed. In addition the present structure includes priority circuitry which operates in conjunction with a data handling system to assert a priority value assigned to the interchangeable interface circuit card and which, based on that priority, determines which one of a number of interchangeable interface circuit cards will be permitted to control a common data path.
    Type: Grant
    Filed: October 18, 1985
    Date of Patent: June 2, 1987
    Assignee: Digital Equipment Corporation
    Inventors: A. Ronald Caprio, John P. Cyr, Bernard O. Geaghan, Paul C. Kotschenreuther, David J. Schanin, Ronald M. Salett
  • Patent number: 4669025
    Abstract: The present device includes a resistor network wherein the values of the resistors are chosen such that the heat generated by current passing through the resistors will be substantially equal to heat generated at a semiconductor junction which is to be cooled. The present device further includes a heat sink which is substantially identical to the heat sink employed to withdraw heat from the semiconductor junction to be cooled. Accordingly, the present device provides heat which is identical to the heat generated at the semiconductor junction and which heat remains ambient to the semiconductor junction to be cooled. The present device further includes a sensor which converts temperature to an electrical signal and which is located substantially in the center of the resistor network and at a distance from the heat sink that approximates the position of the semiconductor junction from its heat sink.
    Type: Grant
    Filed: April 21, 1986
    Date of Patent: May 26, 1987
    Assignee: Digital Equipment Corporation
    Inventors: Charles R. Barker, III, Robert V. White, John T. Bartoszek
  • Patent number: 4667307
    Abstract: The present invention is circuitry which is employed with a data terminal which data terminal in turn is part of a system including a main data processor. The present circuitry includes a microprocessor which is connected to the main data processor and to the keyboard. The microprocessor processes signals from both the main data processor and the keyboard. The system has a plurality of operational function circuits, such as a circuit to effect smooth scrolling on a data display means. There is logic circuitry connected between the microprocessor and the operational function circuits. The logic circuitry provides a first path which permits signals, generated in response to instructions from the main data processor, to pass therethrough to select one of the operational function circuits and simultaneously therewith to turn the selected circuit either on or off.
    Type: Grant
    Filed: November 14, 1983
    Date of Patent: May 19, 1987
    Assignee: Digital Equipment Corporation
    Inventors: Thomas C. Porcher, Morgan E. Robinson, David B. Hughes
  • Patent number: 4662049
    Abstract: The present system is comprised of an elongated member which has a finger like protrusion and a cam protrusion both of which are disposed close to one end thereof. The elongated member has an elongated slot at one end which fits over a stud and is further rotationally coupled to a crank so that the elongated member can pivot around said stud in a number of different positions in response to the crank being moved. The crank is rotationally coupled to a cam follower and the crank is further arranged to rotate about a stud. When a tape leader from a take up reel is to be joined to a tape leader from a supply reel, the elongated member is moved toward the tape leader from the take up reel and the finger like protrusion enters a first slot in the take up reel leader and moves that leader to an extended position whereat the cam protrusion cams a tab on the end of the take up reel leader away from the elongated member. The tab is formed to have a stem section.
    Type: Grant
    Filed: February 13, 1984
    Date of Patent: May 5, 1987
    Assignee: Digital Equipment Corporation
    Inventor: Friedrich R. Hertrich
  • Patent number: 4656546
    Abstract: The present device provides a downstream magnetic shield which is integrally formed with a write pole section having a tip to make up a magnetic recording head. The shield and the write pole tip are located with small gap therebetween, so that magnetic flux which fringes from the magnetic write pole tip is intercepted by the shield. Accordingly such fringing flux does not pass through the recording medium, and hence if a data bit has been written into the recording medium its dipole identity will not be weakened by the fringing flux of a subsequent data bit being written into the magnetic recording medium. In addition, the magnetic recording medium is made up of a first layer of material having perpendicular uniaxial anisotropy and an underlying layer made of a material which has a low magnetic flux reluctance characteristic.
    Type: Grant
    Filed: January 22, 1985
    Date of Patent: April 7, 1987
    Assignee: Digital Equipment Corporation
    Inventor: Michael L. Mallory
  • Patent number: 4652795
    Abstract: The present device comprises, in a preferred embodiment, a permanent magnet assembly which is formed to closely resemble a doughnut with the inside surface defining an aperture having first and second ends. Said inside surface is formed concave to substantially resemble the letter "C." The permanent magnet provides magnetic flux from one end of the "C" shaped inside surface to the other end. Hence the magnetic flux lines, or the magnetic flux field, form an enclosure with the concave configuration of the inside surface. An anode is located within the enclosure and is shielded by the magnetic flux field, i.e., the magnetic flux impedes the electrons from directly striking the anode. A cathode means is fitted over said first end of the aperture of the permanent magnetic assembly. A plasma exit plate, having a substantially large aperture therein, is fitted over said second end of the aperture of the permanent magnetic assembly.
    Type: Grant
    Filed: March 14, 1985
    Date of Patent: March 24, 1987
    Assignee: Denton Vacuum Inc.
    Inventors: Kon J. Lee, Anthony Musset, Richard A. Denton
  • Patent number: 4641482
    Abstract: The present invention includes at least one low mass flexible heat transfer member to which there is secured a plurality of electrical resistance paths, for each area of the material to be sealed during an excursion through the heat station. The electrical resistance paths are respectively connected to a power source, or power sources, to generate different quantities of heat respectively at different positions along the heat transfer member. The heat transfer member is flexible and is formed and disposed to push against sealable material to transfer heat thereto and cause said sealable material to be sealed.
    Type: Grant
    Filed: October 6, 1982
    Date of Patent: February 10, 1987
    Assignee: Athena Controls Inc
    Inventor: Bruce E. Metz
  • Patent number: 4639891
    Abstract: The present invention is related to clearing a communication path and in the alternative blocking said communication path between a data terminal and a main data processor, when it appears, from said terminal end, that the data path into the main computer is blocked by some system irregularity in a first case, or should be blocked because of a data overflow condition, in a second case. The present system employs a pair of buffers, the first of which is connected in said communication path, while the second buffer is connected in a data path along which data signals are transmitted from the main data processor. Said communication path includes first logic circuitry connected between said first buffer device and a UART which is connected to the main data processor. Said first logic circuitry can block or unblock the transmission of data to the main data processor. Second logic circuitry is connected between the second buffer and said UART.
    Type: Grant
    Filed: November 14, 1983
    Date of Patent: January 27, 1987
    Assignee: Digital Equipment Corporation
    Inventors: Thomas C. Porcher, Morgan E. Robinson
  • Patent number: 4631611
    Abstract: The present invention employs, in a preferred embodiment, a pair of pulleys, one of which is fixed and the other of which is movable and each of which has substantially the same diameter. The pulleys each have an axial aperture which holds a bearing arrangement including a shaft. Mounted across the two shafts is a pair of plates which are interconnected and therefore act together as a rigid body. The rigid body, or rigid member, is movable in a rotary fashion. In addition, there is a flexible band member which loops a substantial section of the movable pulley and, in a preferred embodiment, is disposed to come in frictional contact with the movable pulley and the fixed pulley. The ends of the band are secured to the fixed pulley and are held in tension.
    Type: Grant
    Filed: September 6, 1983
    Date of Patent: December 23, 1986
    Assignee: Digital Equipment Corporation
    Inventor: Guenter Schneider
  • Patent number: 4625203
    Abstract: The present invention includes a microprocessor which acts to generate groups of its signals from its read only memory (ROM) thereby forming character representations of groups of coded signals, such as ASCII coded signals, coming from a main data processing device. The groups of bit signals are temporarily stored in a buffer which at a subsequent time transmits, in parallel, groups of said bit signals to a bit map memory through some logic circuitry. The group, or block, transfer of said bit signals in parallel, occurs during horizontal or vertical blank periods. The parallel transfer during the blank periods provides part of the basis for acceleration of the data to a display device as compared with the prior art. In addition, the microprocessor provides address information signals to a graphic display controller, which in turn provides starting addresses, for the locations of the bit signals.
    Type: Grant
    Filed: October 18, 1983
    Date of Patent: November 25, 1986
    Assignee: Digital Equipment Corporation
    Inventors: Robert S. DiNitto, Thomas C. Porcher, John W. Eng, Charles S. Namias, David B. Hughes
  • Patent number: 4621877
    Abstract: The present arrangement enables first and second section, or first second and third sections, of a housing device to be secured together without the necessity of a plurality of screws, or winged nuts, or clamps, or the like. In a preferred embodiment two side walls are formed with grooved edges. Each of the groove edges has its outer wall placed in abutment with a different associated resilient gasket and between the resilient gaskets there is located an extension member of a third wall. The grooved edges have an inverted U-shaped compression strip forced thereinto and the compression strip in turn forces the outer walls of the grooved edges toward the resilient gaskets which in turn are squeezed against the extension member thereby locking the three walls together rapidly. The removal of the compression strip enables the side walls to be free and hence separatable to enable the user to work on items inside of the housing.
    Type: Grant
    Filed: August 1, 1984
    Date of Patent: November 11, 1986
    Assignee: Digital Equipment Corporation
    Inventors: Ronald B. Boudreau, Charles F. Termini
  • Patent number: 4621323
    Abstract: The present invention provides parity error detection circuitry to effect an automatic second transmission of the data information signals in the event that a first transmission of said data information signals is determined to have a parity error. The invention includes a latch register through which data information signals are transmitted from a slave device to a master device and, there is also included parity check circuitry. When a parity error occurs in the transmission of data information signals, a parity error signal is generated by the master device which ultimately causes the latch register to hold the information which was previously transmitted as data signals and which data signals gave rise to the parity error. Accordingly a second set of data signals can be transmitted from the latch register, in an attempt to get a transmission of said data signals without error.
    Type: Grant
    Filed: March 28, 1983
    Date of Patent: November 4, 1986
    Assignee: Digital Equipment Corporation
    Inventor: Steven C. Mayhew