Abstract: The disclosure describes apparatus for checking the operation of control circuits of the type used to actuate the hammers of a printer. A first gating matrix is addressed by a selector so that the control circuits are operated in groups during a plurality of sub-cycles of operation. Detectors which generate an error signal in response to the erroneous operation of each control circuit are connected to the gates of a second gating matrix arranged in the same manner as the first gating matrix. The selector also addresses the second gating matrix so that the detectors which generate error signals can be identified in an error register connected to the second gating matrix.

Abstract: Means for protecting a towing or mooring cable comprising a longitudinal sleeve of resilient wear-resistant material, e.g., polyurethane, with at least one longitudinally extending external flat face, the sleeve being split into two individual parts and the parts secured together by a plurality of pairs of screws passing through holes in a metal strap bonded in one part into tapped holes in another metal strap bonded in the other part.

Abstract: A system for powering a gas-sealed, flywheel-type turbine comprises a pair of pressurized storage tanks used alternately as a source and sink of Freon. A rotary valve, in a first position, directs liquid Freon from the first storage tank, functioning as a Freon source, to a boiler to produce super-heated Freon vapor. The super-heated vapor is used to directly drive the turbine, and the turbine exhaust vapor is converted back to liquid Freon in a condenser. The high pressure outlet of the turbine is used, via a capillary tube, to supply pressure for forcing the liquid Freon from the storage tank to the boiler. The condensed Freon is then directed, through the rotary valve, to the second storage tank functioning as a Freon sink. When the liquid Freon in the first storage tank is nearly depleted, boiling of the Freon is detected by a thermostatic bulb in thermal contact with the tank bottom.

Abstract: An alarm circuit module for automobile, home or industry comprises a time delay device, such as a thermostatic relay, having a set of thermally responsive contacts and an electrical heating element. When energized, the heating element causes the contacts to close for connecting an alarm to a source of power, such as a battery. The heating element is energized by the battery through sensor switches in doors, windows, etc., responsive to unauthorized entry. When the alarm is readied with a lockable switch, and a door responsive sensor switch is closed by an unauthorized entry, energization of the heating element causes the thermally responsive contacts to close. And when the switch is subsequently opened, residual heat contained in the set of thermally responsive contacts causes the alarm to remain energized for a preset period of time. When the contacts cool, the alarm is automatically deenergized to save the battery.

Abstract: A compact device for locking an article, such as an office machine, to a desk or fixed base comprises a flexible cable secured at one end to a key-operated lock, and at the other end to an anchor block. The anchor block is in turn secured to the desk with a one-way screw. The lock is engageable with a plate member permanently secured to the bottom of the machine. The plate member is step-shaped adjacent the machine so that the lock engaging portion of the member is maintained parallel to and above the surface of the desk. This prevents interference between the bottom of the lock and the desk, and expedites engagement of disengagement of the lock. The cable retains the office machine in proximity to the desk, yet permits the position of the machine to be adjusted to suit the user.

Abstract: An assembly for preventing the falling of dust and debris from the roof and from the break of a mine, particularly a coal mine. The assembly comprises a shield support structure having roof bars and a roof covering disposed between the roof of the mine and the roof bars. The roof covering includes a welded wire-netting sheet having longitudinal and transverse wires with a dust-tight web welded or fixed in between said longitudinal and transverse wires.

Abstract: There is disclosed a tridecapeptide of the following sequence:H.sub.2 N--Gly--Glu--Gln--Arg--Lys--Asp--Val--Tyr--Val--Gln--Leu--Tyr--Leu--COOHthis tridecapeptide has the capability of including the differentiation of T lymphocytes but not of complement receptor (CR.sup.+) B lymphocytes and thus is useful in a number of therapeutic areas. Also provided are novel intermediate polypeptides and methods of manufacture of the peptides.

Abstract: A screen construction applicable to exhibition and display purposes but also applicable to booths for attendants or projection equipment, room dividers or toy building kits comprises a plurality of support members of elongate form and uniform circular cross-section, a plurality of rectangular panels, and a plurality of clips secured at least two on each of two opposite edges of each panel and snapping on to the support members, thus enabling adjacent columns of panels to be set at any inclination to each other, the clips on one edge of any panel preferably having spacings from one end of that edge differing from their spacings from the other end of that same edge by at least the thickness of the clips measured in the direction of that edge, whereby two adjacent panels can be attached to one support member with the corresponding edges of the panels perpendicular to the support member in register with each other thus enabling a solid screen to be constructed.

Abstract: There is disclosed a new Ubiquitous Immunopoietic Polypeptide (UBIP) which has been isolated in fluffy white powder form from bovine thymus but which has been found to be present in living cellular tissue of all animals and plants tested including various guinea pig tissues, cells in tissue cultures and tissues from birds, fish, squid, plants, fungi and bacteria, the polypeptide being characterized by its ability to induce in vitro, in nanogram concentrations, the differentiation of both T cell and B cell immunocytes from precursors present in bone marrow or spleen and thus the polypeptide is useful in therapeutic areas involving thymic or immunity deficiencies and the like. The polypeptide also exhibits hypotensive properties. The polypeptide is isolated from living source materials by a combination of sizing techniques and ion-exchange chromatography and may be described by the following amino acid structural sequence:H.sub.

Abstract: A compensating bridge circuit is used for measuring physical quantities dctly. The circuit comprises an unbalanced Wheatstone bridge having a quantity-dependent voltage at an output thereof. An ohmic potential divider circuit produces a divisional voltage for compensating the quantity-dependent voltage. The divider circuit includes two resistances one of which is variable. An input voltage is fed to the Wheatstone bridge and a supply voltage is provided to the potential divider circuit. The supply voltage is composed of the bridge input voltage and the divisional voltage whereby, when the circuit system is balanced, the relationship between an input quantity x and a balancing quantity y is linear.

Abstract: According to the present invention, an articulated support arrangement for carrying a tool comprises a support member, a turret pivotally attached thereto, means to rotate the turret with respect to the support member, link means pivotally connected between one part of the turret and one part of a boom, at least one ram pivotally connected between another part of the turret and another part of the boom, means to rotate the link means about the pivotal connection thereof at the turret, the boom comprising a rear portion having a part capable of rotation about the longitudinal axis of the boom, means to effect such rotation, and a front portion attached at one end to that part and at the other end pivotally attachable to a tool or mounting thereof, with a ram pivotally attached at one end to the front portion of the boom and the other end being operable on the tool.

Abstract: Potassium sulfate (K.sub.2 SO.sub.4) is prepared by contacting potassium chloride with an aqueous solution containing potassium bisulfate at a temperature of about 65.degree.-110.degree. C., cooling the solution and permitting the potassium sulfate to crystallize from solution.

Abstract: The disclosure describes an interface including data lines and address lines which address a memory. Control lines control the exchanges of data among the data lines, address lines, memory and data processing unit. A parity line provides a means of checking the accuracy of the information transmitted on the data or address lines.

Abstract: A glass wall, in particular for a sports area, is formed of toughened glass sheets and drilling of the sheets obviated or minimised by assembling the glass sheets edge-to-edge, with a pair of resiliently lined side channels fitted to the end pair of glass edges and with resiliently lined top and bottom channels fitted to the top and bottom edges respectively of the glass sheets, each pair of abutting glass edges being overlapped by a pillar with a resilient strip in between, and a door may be formed by a glass sheet with pivots secured to the door and the top and bottom channels or the top and bottom of an opening in a wall to which the channels are secured, with a small hole in the door for access to a latch carried by the door and engageable with one of the pillars flanking the door.

Abstract: A do-it-yourself shelving unit designed for easy installation with existing shower stalls and adaptable for use with either curtain or sliding door-type shower stalls. The shelving unit comprises three basic pieces including a horizontal shelf, a vertical shield, and a retaining member, plus mounting brackets. The shelving unit may be cut to size for mounting on the top of the existing stall curtain or door so as to provide a convenient and handy shelf for toiletry articles and the like.

Abstract: A high-Q load circuit is matched to a drive circuit with an L-type filter network including series and shunt reactances which are both either inductive or capacitive. While a first of the reactances is effectively removed from the network, the value of the second of the reactances is varied until the impedance magnitude of the load and network, as seen from the drive circuit, reaches a predetermined magnitude, and a predetermined relationship exists for the polarity of the phase of the voltage and current supplied by the drive circuit to the network. When the impedance magnitude seen by looking from the drive circuit into the network reaches the predetermined magnitude and the correct phase polarity exists, the first reactance is reconnected into the network and then varied until a predetermined relationship exists between the phase angle between the voltage and current applied by the drive circuit to the network.

Abstract: An aircraft collision avoidance system and method involves transmitting a stable reference frequency from a synchronous satellite to aircraft in a region being monitored. Each aircraft in the region receives the reference frequency and transmits a carrier, modulated with the received reference frequency, to other aircraft in a collision avoidance zone. At the other aircraft, an indication of impending collision is provided by measuring the rate of change of the carrier Doppler frequency shift received thereby from the first named aircraft. Sync pulses periodically modulate the reference frequency transmitted from the satellite for aircraft ranging and data control purposes. To limit the collision warning zone relative to each aircraft, the receiver thereof is deactivated at a predetermined time after each sync pulse is received from the satellite.

Abstract: A scanner having an instantaneous narrow field of view determines spectral and positional information of a point source of optical radiation in a relatively wide field of view. A first optical path includes the scanning means, a dispersion means, and a first detector means so that different wavelengths of the source are convoluted to impinge on the first detector means at different times during a scan of the field of view. A second optical path includes the scanning means, the second detector means, and a narrow bandpass filter for enabling approximately monochromatic energy of the source to impinge on a second detector means displaced from the first detector means. Thereby, a predetermined wavelength is imaged on the second detector means at a time during a scan that differs from the time when that wavelength is imaged on the first detector means, even though the source angular position in the field of view is substantially the same for both of the optical paths.

Abstract: A composition and method for cleaning and fire proofing substrates such as carpets, rugs and the like, by application of an aqueous composition containing an amine, phosphoric acid or equivalent inorganic acid, one or more fire proofing agents and a detergent.

Abstract: An armoured flexible conveyor comprising pans connected together so that separation of the pans is prevented except when snaking-over to a new alignment adjacent a newly-cut mine face and except when the conveyor extends over humps and swillies in the mine floor, and a rigid plate secured along one side of each pan, said plate extending upwardly from said pan, adjacent pairs of pan ends being connected to each other, firstly by upper and lower joints between adjacent ends of said rigid plates, one of said joints being a universal joint and the other being a loose joint affording limited separation of said plates and pans at that joint, and secondly, by a loose joint at the other side of said pans also affording limited separation of said pans at said other side.