Abstract: A multiple frequency adaptive filter system for filtering undesired periodic and/or correlated interference signals contained in the same frequency band as a desired input signal. The filter system is capable of filtering at least two sinusoidal interference signals and incorporates a negative feedback loop having a transfer function of that of narrow band-pass multiple filter. The feedback loop using interference frequencies generates a corresponding interference enhanced output signal. This enhanced output signal is combined with the input signal whereby to produce an error signal which corresponds to the desired signal contained in the input frequency band. A double or quadruple filter system is also described as examples of the present invention. The filter system is suitable for removing modulated sinusoidal interference and particularly for reducing TV co-channel interference.

Abstract: A new crystalline titanoborosilicate comprises a molecular sieve material having the following composition in terms of mole ratios of oxide:0.9.+-.0.2M.sub.2/n O: aTiO.sub.2 :bB.sub.2 O.sub.3 : ySiO.sub.2.zH.sub.2 Owherein M is at least one cation having a valence n, a is greater than zero but less than 1, b is greater than zero but less than 1 such that a+b=1, y is a value within the range of 8 to about 500, and z is a value within the range of 0 to about 100 and giving a specific X-ray diffraction pattern. The crystalline titanoborosilicate is used to catalyze various processes such as conversion of simple alcohols into liquid hydrocarbons having boiling points within the gasoline boiling range, aromatization, and alkylation. A process of preparing the new crystalline titanoborosilicate is also disclosed.

Abstract: The invention relates to an adaptive filtering system for cancelling one or more sinusoidal interference signal contained with a desired signal in an incoming signal. A phase-locked loop is used to track a sinusoidal interference frequency and to synthesize various synchronous in-phase/in-quadrature square wave signals. Each of these signals is weighted in accordance with variations in the amplitude and the phase of the sinusoidal interference signal and the weighted square wave signals are combined together with the incoming signal so as to deliver the desired signal substantially free from any sinusoidal interference signal. In the case of multiple correlated signals, the instant filtering system gives a steady state performance substantially better than that of the well known Widrow-Hoff adaptive notch filter.

Abstract: A digital system for removing, from a television signal, the electrical noise generated by faulty isolators from power lines. A thin horizontal segment noise detector locates possible noisy pixels (picture elements), and an image horizontal line verifier prevents false alarms given by the noise detector. An image corrector is provided to remove detected noise. The real time algorithm described in the invention is designed to provide a robust detector pseudo independent of noise waveforms, a memory window of three video delay lines, and a low cost digital hardware system.

Abstract: The present invention relates to a paint strainer, its blank and the method of making same. The strainer comprises a conical receptacle having a conically tapering side wall formed of stiff sheet material and defining an upper support portion having an open end, and a lower filtration portion. The lower filtration portion has a first reinforcing arm formed integral with the upper support portion and terminating at a pointed free end located at the apex of the receptacle. A second reinforcing arm is formed integral with the upper support portion and disposed substantially diametrically opposed to the first reinforcing arm. The second reinforcing arm is connected adjacent to the pointed free end of the first reinforcing arm and defines a lower filtration aperture and further side filtration apertures to each side of the first and second reinforcing arms. A filtration mesh screen is disposed over the filtration apertures.

Abstract: A noise damping guard for a circular saw blade of the type mounted for axial rotation relative to a material support plane disposed transverse to the cutting axis of the blade. The guard comprises a stationary lower guard section secured beneath the support plane and a pivoted upper guard section secured above the support plane. Each guard section comprises a guard frame supporting an inner pair of anti-friction metal plates secured in parallel-spaced relationship to one another to receive a saw blade therebetween and define an air gap between each side of the blade and an inner face of the metal plates. A spacer plate and a backing plate is secured to an outer face of each of the metal plates to prevent the vibration of the inner anti-friction metal plate and to provide an additional noise barrier and still further to maintain the metal plates in alignment. A pivoting support arm is secured to the guard upper section for upward displacement of the guard upper section.

Abstract: The present invention relates to a system and a method of extracting liquid from a humid mass by compressing same. The system comprises a conduit of linear, circular or other shape through which the humid mass is displaced. The conduit is of rectangular cross-section, which cross-section can be constant or variable. Further, the conduit has perforated side walls along at least a liquid extraction working section of the conduit. The system further comprises elements which cause an axial pressure at the interior of the humid mass as well as a mechanism to displace at least one of the perforated side walls to convey the humid mass along the working section of the conduit in such a way as to generate between the interior surface of the perforated side walls and the humid mass a dynamic friction force which defines a pressure zone which is less than the axial pressure created by the pressure creating elements.

Abstract: A new crystalline titanoborosilicate comprises a molecular sieve material having the following composition in terms of mole ratios of oxide:0.9.+-.0.2 M.sub.2/n O: TiO.sub.2 :B.sub.2 O.sub.3 :ySiO.sub.2.zH.sub.2 Owherein M is at least one cation having a valence n, y is a value within the range of 8 to about 500, and z is a value within the range of 0 to about 100 and giving a specific X-ray diffraction pattern. The crystalline titanoborosilicate is used to catalyze various processes such as conversion of simple alcohols into liquid hydrocarbons having boiling points within the gasoline boiling range, aromatization, and alkylation. A process of preparing the new crystalline titanoborosilicate is also disclosed.

Abstract: The disclosure herein describes a device for fastening objects to thin or hollow walls which comprises: a bolt, a nut with an aperture, a guide blade mounted to the bolt and extending lengthwise thereof and a bascule mounted to the bolt and interconnected to the nut; pivotal movement of the bascule on and relative to the bolt is caused by the nut being threadedly displaced along the shank portion of the bolt as a result of the screw being rotated; the guide blade extends through the aperture of the nut and prevents it from rotating with the screw.

Abstract: The disclosure describes ceramic foams, for example made of clay, and a process for preparing these foams. Once there is obtained a mixture defining a slip, the latter is caused to be foamed by the addition of controlled quantities of a gas, such as air, thus making it possible to reproduce foams having predetermined physical properties. It is preferable to dry the foam under conditions where the temperature is heterogeneous and in the absence of ventilation. This operation can be carried out by placing the foam under heating elements at a temperature between 30.degree. C. at the start to 100.degree. C. towards the end of the drying, while practically preventing any ventilation in the vicinity of the foam. This process is mainly advantageous in that it enables one to control the physical properties of the foam obtained thereby. This foam can be used as an industrial absorbent, acoustical insulating material, fire-wall, thermal insulating material, etc. by varying the density of the foam.

Abstract: The machine described in this disclosure serves to produce pairs of drawer sides from a panel, the thickness of which is slightly more than twice the thickness of one drawer-side; a first arrangement of saws cuts the panel to a predetermined drawer-side height; while a second arrangement of saws cuts off the panels to a predetermined drawer-side length; by means of conveyors, the panels are then passed to a band-saw which slits each panel, through its thickness, into two boards of substantially equal dimensions; two tables each receive a board laid flat, the lower surface of each board being planed by a series of cutters, the sides being machined by a second series of cutters, and the upper surface being planed and grooved by a third series of cutters; the boards are then brought together on a machining table where horizontal and vertical dovetailing heads form a male dove-tail at the end of the drawer-side and a female dove-tail on the upper surface of the drawer-side.

Abstract: A differentiation and distribution switching system for connecting selected ones of a plurality of subscriber lines for receiving a desired signal. The system comprises at least one differentiation circuit connected to an input signal, a removable support for the differentiation circuit, and a plurality of couplers connected to an output line of the differentiation circuit. A switch is connected to each coupler and an associated one of the subscriber lines, whereby to connect a signal on the output line to selected ones of the subscriber lines.

Abstract: A hospital bed of the type having a base frame and a displaceable frame supported above the base frame by adjustable leg supports whereby the adjustable frame may be displaced vertically above the base frame in parallel relation or at an angular position such as a trendelenburg position. The leg supports are connected in pair and spaced apart adjacent a respective end of the frames. An articulated panelized frame is supported above the displaceable frame and the panels are articulated by an actuating mechanism. A first drive is connected to the adjustable leg supports to cause the displaceable frame to be displaced above the base frame. A follower mechanism is connected to a lower end of the leg supports to maintain the displaceable frame in lateral relationship with the base frame when displaced relative thereto. A second drive is connected to the actuating mechanism of the panelized frame to selectively displace the angular position of the panels.

Abstract: A method and an apparatus for automatically measuring the thickness and the roughness of elongated articles, such as wooden boards. The device comprises a housing having an opening therethrough to receive at least a portion of a board to be measured. At least one contact probe is provided in the housing and is biased against at least one surface of the board to sense irregularities in the flatness of the surface along a measured length thereof. A measuring circuit is connected to the contact probe to provide a measurement signal representative of the sensed irregularities and variations in thickness. A distance measuring device is also provided in the housing to measure the distance of displacement of the board past the contact probe. An output display means indicates selected ones of the measurements obtained. A computing means accumulates measured values of the means, minimum and maximum thickness, for a group of boards and permits the extraction of such statistical information.

Abstract: The specification describes a cutting tool comprising a cylindrical support having a series of cavities arranged in helicoidal rows on its outer surface; in each cavity, a tool-carrier and a chip-breaker are secured by means of a set-screw; means are provided for adjusting the height of the tool-carrier and the chip-breaker, for the purpose of adjusting the position of the blades of these elements within the cavity.

Abstract: A positive feedback RC active biquadratic filter circuit comprising a passive input RC section and an active amplification output section having at least one operational amplifier. The RC section has two true resistive T-networks and a true capacitive T-network connected to receive an input signal. The RC section realizes a second order function with a low Q factor. The operational amplifier has a feedback resistive connection from an output thereof to a mid-junction point between each of three capacitances in the capacitive T-network. The capacitive T-network and one of the two resistive T-networks are connected to a positive input of the operational amplifier. The other resistive T-network is connected to a negative input of the operational amplifier.

Abstract: The apparatus comprises a delumper-sifter and a mixer used to prepare a mixture of peat and water which is placed in storage; the mixture is then passed to a forming device, is extruded in the form of continuous cylinder and is covered with a sheet of degradable paper; the covered product is cut up by means of a rotating spiral cutter, the rotational speed of which is synchronized with the speed at which the mixture emerges from the forming device, thus making it possible to obtain cylindrical extrusions of a predetermined length; the cut extrusions pass to a conveyor-distributor which arranges them in rows and then allows them to fall, in a vertical position, onto a supporting conveyor above which a drum, equipped with cylindrical protuberances, produces in the extrusions cavities in which seeds are subsequently placed and covered with sand; the final operation carried out by the apparatus is to group the seedling tubes thus produced and to wrap them in packages.

Abstract: An audiometer for testing the hearing characteristic of a person. The audiometer is entirely operable by the user whereby technicians are not required. The audiometer comprises a source of audible and selectable fixed frequency signals. An automatic frequency selector switch selects a predetermined frequency signal from the source. A variable attenuator circuit is provided to automatically attenuate, in sequence, the predetermined frequency through a plurality of attenuation levels and according to a preselected mode of operation whereby to transmit a plurality of attenuated frequency signals. The attenuated frequency signals are transmitted for audible reception by the person using the audiometer. Visual display lamps indicate the test frequencies and attenuation, permitting the user to fill out a test chart on corresponding sounds audible to his ears. A control circuit is provided to enable the frequency selector means and the variable attenuator in accordance with a preselected mode of operation.

Abstract: The instrument is used in laparoscopic tubal cauterization whereby a fallopian tube is completely blocked by coagulation and comprises: an elongated narrow sheath; an electrically insulated separator means slidably mounted in the sheath; and a pair of bipolar electrodes secured in diametrically opposite grooves extending longitudinally of the sheath. Each electrode defines at one end thereof a prong extending outwardly from one end of the sheath; the prongs are spaced from one another to define a first tube-receiving position whereby a tube may be received therebetween; the prongs may be moved to a second tube-squeezing position by slidably retracting the separator means in the sheath. The opposite end of each electrode is adapted for electrical connection to an external source of cauterizing current.

Abstract: The disclosure herein describes a trocar particularly intended for use in laparoscopic tubal cauterization and formed of: a puncturing sharp-pointed instrument, a cannula with a flange at one end thereof, a flexible insulating ring which is received in the flange recess bore, and a collar secured in the flange bore. The collar retains the ring in the flange while allowing it to flex as the puncturing instrument is introduced in the cannula or disassociated therefrom. The puncturing instrument, cannula and collar are made of inexpensive bio-compatible plastic materials while the ring is made of rubber; consequently, the trocar is disposable after use.