Abstract: Manhole sealing device to prevent water from entering a manhole through the corbel joint between the manhole casing and cover frame. The device comprises a flexible tube like membrane spanning the corbel joint of the manhole and provided with first sealing means above the corbel joint to seal the membrane against the inside wall of the cover frame and second sealing means below the corbel joint to seal the flexible membrane against the inside wall of the manhole casing. The portion of the membrane between the first and second sealing means is preferably provided with enough slack to form a inward fold defining an annular pocket to contain any water or other fluids entering the manhole through the corbel joint thereof. In a preferred mode of the present invention the membrane is a bag with a closed bottom to catch any water entering the manhole through or around the manhole cover. The manhole sealing device can be installed in an existing manhole without replacing any of the structural parts thereof.

Abstract: A multicell x-ray detector of the gas-filled ionization type includes a metal body in which the front, rear, end and bottom walls together with a sealed cover define a channel in which there is a row of spaced apart electrode plates which define cells in which ionization events and resultant analog signals are produced in response to absorption of x-ray photons by the gas. The x-ray entrance window is formed in the front wall and extends over substantially the length of the channel. The window has a curved cross section which permits restriction of its internal stresses to tensile stresses so its thickness and, hence, its x-ray absorption is minimized. The edges of the electrode plates which are presented toward the window are curved to be concentric with and slightly spaced from the window.

Abstract: Disclosed herein is a tube type solar heating device in which room air is circulated through tubes located exteriorly of the building and confined in an enclosure having a reflector. The temperature of the air discharged from the outlet of the tubes is controlled by an adjustable bimetal coil which is supported on the upper door in the outlet and connected to the lower door in the inlet by a cable. The control of air flow through the tubes provides uniform temperature of the air discharged. Fans located in the tubes and connected to a separate thermostatic control are energized when the air in the solar collector reaches a preselected temperature. The fans are provided with quick change mounts which facilitate installation.

Abstract: An air cleaner suitable for vehicles, ships, mines and tunnels has a tank for cleaning liquid, an extensible or flexible feed tube for air, and means for maintaining the outlet of the feed tube at the level of the cleaning liquid. The outlet is preferably floated on the cleaning liquid, rounded or circular in plan view, divided into chambers and provided with a depending skirt with an indented edge to help in maintaining the outlet upright by allowing the escape of gas and its exchange between compartments. More than one air feed tube may be provided.

Abstract: A coin operated vending machine has a plurality of storage racks for containers, with each storage rack provided with a selector control button. Each rack includes first and second storage sections, each section having slant storage shelves and a discharge channel. The discharge channels for each section discharge to a common outlet. A circuit alternates discharge in a preselected sequence from the two sections in each rack to rotate the stock and insure that the first cans loaded are the first cans vended.

Abstract: A laminated touch switch panel includes a lowermost insulating board having foil contacts on its top surface and a perforated uppermost board having foil contacts on its bottom surface. A perforated insulating spacer sheet has its bottom surface interfacing with the top of the lowermost board and its upper surface interfacing with an intervening flexible perforated membrane. The membrane has foil contacts on its upper surface which are normally closed with respect to the contacts on the bottom of the uppermost board and has contacts on its lower surface which are normally open with respect to the contacts on the lowermost board. Flexing the membrane with a force applied through the uppermost board opens the normally closed contacts and closes the normally open contacts. In one embodiment, contacts are kept normally closed with resilient elements that apply a force on the membrane which is overcome to open the contacts by applying a force through an aperture in the uppermost board.

Abstract: A protective cover for a photographic slide tray that is used with a slide projector. The cover is a thin disk of semi-rigid material having a large central opening and a generally imperforate annular marginal area which is superposed over circularly arranged separator walls which define slide holding slots in the tray. A flanged locking ring which holds the slides in the tray also secures the cover. The cover yields under the influence of the air blast from the projector cooling fan to minimize retardation of cooling air flow.

Abstract: In a computed tomography system a cylindrical calibration phantom having a vertical and a horizontal crosshair on its front face is adjusted until the intersection point of the crosshairs is coincident with the isocenter of the x-ray scanner as demonstrated by the display of a reconstructed tomographic of the phantom. Vertical and horizontal intersecting coherent light beams from a laser source are then projected onto the phantom and the source is adjusted until the light beams, crosshairs and their intersections coincide. Any phantom used for any subsequent calibration only needs to be adjusted until the permanently set laser light beams coincide with its crosshairs in which case the isocenter is determined exactly again and the apparatus is ready immediately for a calibration run.

Abstract: Glue roller for use in labeling machines and the like, comprising a metal hub, a tubelike support body fixed on the hub, and an elastic sleeve with a cylindrical outer surface seated on the support body. The support body is a first moulded part of foam material having sealed boundary zones, which is foamed directly onto the hub. The elastic sleeve is a second moulded part of elastic foam material with sealed boundary zones, which is foamed directly onto the support body. The support body and elastic sleeve are provided with interengaging projections and recesses which extend parallel to the axis of the roller.

Abstract: An x-ray image intensifier is mounted over a patient supporting table for moving horizontally, vertically and for tilting about a laterally extending axis to obtain x-ray views on both sides of vertical. An x-ray tube casing is mounted on a base member in a housing below the table for tilting in angular synchronism with the intensifier. The base member is on a vertically movable platform and is rotatable about a vertical axis to enable positioning the focal spot of an x-ray tube in the casing for making oblique as well as longitudinal x-ray views of the heart of a patient on the table.

Abstract: A programmable and self synchronizing wire drawing device includes a stationary sleeve member having a bore. A work cylinder having an end cap piston at each end is axially reciprocable in the bore. The piston diameters equal the diameter of the bore and the cylinder diameter is less than that of the bore so the wall of the bore and the outside of the work cylinder define an annular air space that is closed at its ends by the pistons. An annulus is fixed within the annular space between the pistons. A wire gripper is supported from one piston at a distance therefrom. A hydraulic piston is reciprocable within the work cylinder and it is on a tubular piston rod which extends slideably and sealingly through the end cap pistons. A wire drawing die is mounted on the end of the piston rod which is nearest the gripper. The hydraulic and air driven pistons cooperate to draw wire and feed segments of it to a consuming machine.

Abstract: An ultrasound transducer is translatable for scanning along a body surface by having the transducer mounted at the free end of an articulated arm which is moved in a single nominally vertical plane during a scan. The arm is pivotally connected at one end to a head which is turnable at least about a vertical axis so the arm can be directed in other single planes. The head is mounted on a horizontally and transversely movable arm which is on a longitudinally movable carriage. Potentiometers produce analog signals which allow a microprocessor to determine the difference between the location of the transducer axis and the vertical axis about which the arm swings into different planes. When isocentric rotation is desired, the user locates the transducer over the isocentric point on the body and provides a command signal which, through a servo motor system, causes the transverse arm and longitudinal carriage to move until the vertical head axis is aligned with the transducer.

Abstract: A screen for converting an electron image to an optical image is made by coating a transparent substrate with 1 micron mean particle size phosphor in fluid thermoplastic material using a spinning method. When the thermoplastic is set it is heated to near melting and additional fine phosphor is driven into its surface with an ultrafine sponge. After baking, this first layer is coated with a slurry of coarser grain phosphor suspended in water and a silicate compound and the substrate is centrifuged. After this second layer is dry, a thin coat of lacquer is applied and dried followed by aluminizing the lacquer. The coated screen is then baked to drive off the lacquer volatiles.

Abstract: A device for handling a group of cables running to medical x-ray equipment that is movable in all degrees of freedom comprises: A vertical axle mounted overhead; a boom swingable in a horizontal plane on the axle; a housing on the axle having openings for receiving and clamping the ends of respective flexible cable enclosing tubes, one of which extends over the boom to the equipment and the other of which establishes a cable path continuing to a swivel mechanism that is spaced from the axle and mounted overhead.

Abstract: A hollow three dimensional metal article is formed by cutting two identical flat metal blanks, forming a hole in one of the blanks and upsetting the metal around the hole to accommodate the head of a threaded hollow stud having a sealing collar without interference when the blanks are in face contact, placing the blanks in face contact while the stud is in place, welding the metal blanks together continuously around the entire perimeter of the superimposed blanks, and forcing liquid under pressure through the hollow stud until a precise preset maximum pressure is reached to inflate the blanks to their final three dimensional form. Optional steps include cutting off the portion of the three dimensional form in which the stud and the opening for the stud are located and welding a standard fitting into the opening thus created and the provision of other portions of the three dimensional object with other attachments and fittings.

Abstract: Method and apparatus for attaching elastic bands to a web comprised of absorbent articles such as diapers which are fabricated to lie transversely of the length of a continuous fabrication line. The bands are stretched in a direction transverse to the fabrication line and are attached to the web in their stretched condition and are maintained in stretched condition transversely to the web until the article is fabricated.

Abstract: Apparatus for forming corrugated sheet material includes coacting rolls (10,11) by which material having corrugations with crests and intervening flanks is formed. The crests are closed up to one another by a first pair of rollers (22) which run at relatively high speed followed by a second pair of rollers (27) which run at a relatively low speed. The rollers engage the crests or the side edges of the material to control the rate of feed of the material between each pair of rollers.The invention finds application in forming corrugated metal sheet for heat exchangers.

Abstract: An FM tuner control circuit contains a digital frequency synthesizing control circuit, digital computer means including a microprocessor, a memory circuit, and a manual control circuit for digitally tuning the tuner to any desired FM station. The memory circuit includes a read-only memory containing programs for the microprocessor and a random-access memory in which a group of predetermined station frequencies can be stored. The control circuit also includes a call letter display circuit, a frequency scale pointer display circuit, a frequency display circuit, a manual tuning circuit, and remote control switches for the manual control circuit.

Abstract: A graphite target disk for a rotating anode x-ray tube is adapted for mounting it on a rotor stem in a manner which reduces the probability of the target cracking when it is subjected to high magnitude thermal and rotational shocks. The graphite disk has a counterbore in its front and rear faces which are connected with a smaller central bore so the counterbores define annular shoulders. A washer having a slot which serves as a keyway is brazed concentrically onto the shoulder of the front counterbore. The rotor stem has a threaded end which registers complementarily in the slot to effect a driving connection and the stem has a radially extending shoulder which interfaces with the shoulder in the rear counterbore. A nut on the threaded stem end secures the target to the stem.

Abstract: The glass envelope of a rotating anode x-ray tube has a tubular stem sealed into it. A rotor shaft which supports the x-ray target and induction rotor is coaxial with the tubular stem. The front ball bearing for the shaft has its outer race fixed in the end of the tubular stem and its inner race fixed on the shaft. The rear bearing has its inner race fixed on the shaft and its outer race fixed in a bearing retainer sleeve which is axially yieldable in the tubular stem. A coil spring is interposed between one end of the stem and the bearing retainer sleeve to force the outer race, balls and inner race of the bearings into good electric current exchange contact during rotor operation and to accommodate thermal expansion.