Abstract: A disc brake assembly includes one or more rotatable friction discs which are slidably keyed to a second portion of a two part shaft assembly and the second portion surrounds and is rotatable relative to the first portion which transmits drive directly to a wheel and drives the second portion through a reduction gear train so that the second portion can rotate at a greater speed than the first.

Abstract: A luggage case or bag of the unstructured type having a semi-rigid support frame with a plurality of strips fixed on the interior of the case, such as at the four corners, forming pockets into which thin flexible sheets or inserts of lightweight material such as plastic material may be optionally disposed or removed. With the inserts removed, the bag may be fully collapsed to a flat position. With the inserts installed, the edgewise rigidity of the inserts supports the body gussets, or walls, of the case in the manner of a fully structured or framed case. In a modified arrangement, the interior pockets are oriented vertically to enable installation of the inserts through the top opening of the pocket. The inserts have some longitudinal rigidity and project in part above the top of the body gusset to provide a structured support to the body and lid gussets and assist in alignment of the lid and body.

Abstract: A rail car having an interior cavity and an end opening for loading and unloading lading is provided with a pair of door assemblies, each of which includes a plurality of panels, each pivotally movable with respect to the other for closing at least a portion of the end opening. Pivot means comprising a shaft for mounting each of the door assemblies are provided to move the door assemblies between their respective open position and closed position. The pivot means are mounted for movement toward and away from the interior of the rail car on a track to permit storage of the door assemblies within the rail car when their panels are folded back upon one another. The shaft is manually driven by means of a housing. A rack and a source of rotational power including a cooperating pinion mounted on the shaft act to guide, move and lock the door. The housing has a cavity into which one or more enlarged lever ends are inserted and secured before assembly of the housing to the shaft.

Abstract: Clutch mechanisms are disclosed having two clutch assemblies associated with a single or two separate output shafts. To minimize the axial dimension of the clutch mechanism and yet provide the required spring loading when the clutch assemblies act independently, for example, the spring loading is provided by two Belleville type spring washers interposed between the pressure plates of the clutch assemblies. The spring washers are arranged axially and their configurations tends to converge in the same direction. Spacer ring members are interposed between the spring washers at both their inner and outer peripheries and between each of the spring washers and the pressure plate facing it so that the spring washers are borne exclusively by the spacer ring members.

Abstract: A friction clutch assembly comprising a resilient annular member adapted to be engaged by a clutch release bearing to control axial movement of a pressure plate relative to a cover is disclosed. The resilient annular member comprises tabs which extend axially through apertures in the cover to provide said annular member with a fulcrum. Each tab defines a free end which is bent before assembly and resiliently deformable in an axial direction, whereby the cover is axially prestressed by the tabs after assembly. In a preferred embodiment of the invention, the apertures comprise a first portion permitting axial introduction of the tabs and a second portion permitting rotation of the annular member in a given direction relative to the cover, bent portions of the cover preventing the annular member from rotating in the reverse direction. In another embodiment, a locking ring is inserted between the free ends of the tabs and the cover to prevent the tabs from escaping through the apertures.

Abstract: A torsional vibration damper for use with a friction clutch incorporating torsional springs in a closed retainer housing. One end of each spring is driven by the retainer housing while the other end drives the output hub. The springs provide a resilient drive through a predetermined amount of relative angular movement between the retainer and the output hub after which movement the spring ends are in abutting relation so that a mechanical drive is present and overstressing of the springs is prevented. Preferably, the springs are used in pairs with each spring being less than a 360.degree. arc.

Abstract: A roller structure adapted for supporting a boat on a trailer bed, or the like, which has a cushioned roller surface for engaging the boat hull to distribute the weight stress over a substantial area, and a mounting for the roller on the support bed to guide and support the boat as it is pulled across the rollers with minimum risk of damage to the hull.

Abstract: A stamp book vending machine wherein a motor driven slidable plate extracts a book from the bottom of a vertical stack and at the same time actuates a counter and discharges accumulated coins into a collection box, an independent arrangement being provided for selectively discharging accumulated coins into an externally open coin return pocket without dispensing a stamp book.

Abstract: A method of transferring articles from a continuously moving feeding conveyor to a receiving conveyor whereby a reversing roller device, positioned within the delivery end of the feeding conveyor, is reciprocable with respect to the receiving end of the receiving conveyor in such a way that when the delivery of articles from the feeding conveyor is to be interrupted during a period of time, the velocity of the receiving conveyor is increased approximately simultaneously with the initiation of the forward movement of the reversing roller device but such that the receiving conveyor, during the period of time wherein delivery of articles from the feeding conveyor is interrupted, is moved a distance which is greater than the distance of total forward movement achieved by the reversing roller device, after which the velocity of the receiving conveyor is reduced to its original velocity and the reversing roller device is returned to its starting position.

Abstract: An improved chain bracket, and especially a trolley bracket assembly for use with conveyor chains in overhead conveyor systems. The bracket and assembly parts are economically stamped from sheet metal and include strengthened, reinforced chain link supports or pads which resist bending and wear when under load. In one embodiment, the chain pads extend from one of either the chain bracket or a separate bracket attachment while the reinforcing member extends from the other of the chain bracket or bracket attachment. In another embodiment, the reinforcing portion extends generally in a plane perpendicular to both the chain pad and to the planar bracket portion from which the pad is formed. In this latter case, the reinforcing member may be either integral and in one piece with the chain bracket and pad or extend separately from the bracket attachment.

Abstract: A foldable needle pack comprises a base member, which is created or scored so as to present a fold line comprising a first base portion and a second base portion bordered by the fold line, a needle holder portion mounted near the fold line on the second base portion, and two closely aligned rigid transparent cover members, each formed as a hollow shell wherein the first cover member is at the end edge thereof opposite its open side attached to the first base portion while the second cover member is at the peripheral edge attached on the second base portion whereby when the first base portion is bent back along the fold line relative to the second base portion, the top of each of needles slides on the inner surface of the first cover member and then a free end edge of the first cover member comes into friction contact with the side of the needles to hold the needle pack V-shaped.

Abstract: A two-walled carton for packaging an article. The carton has a front wall and an opposed rear wall joined together along their side edges to form a hollow enclosure of substantially elliptical cross section for receiving the article. The front wall of the carton has an end flap recessed from each end thereof. The end flaps close off the open ends of the carton when the end flaps are folded in a lateral direction substantially at right angles to the front wall. The end flaps extend toward and into engagement with the rear wall. The carton may be provided with an article supporting insert mounted within the container enclosure with the base panel of the insert in engagement with the rear wall. The base panel of the insert is further provided with hinged end panels at each end thereof. The end panels, when folded, extend in the opposite direction from the end flaps; that is, substantially at right angles to the base panel and toward the front wall of the container.

Abstract: The specification discloses a collapsible article carrier formed from a folded sheet of material that is alternatively foldable into a substantially flat, collapsed position and an open position for receiving articles. The article carrier includes a bottom member having first and second bottom panels. First and second side walls are hingedly joined along bottom edges thereof to edges of the first and second bottom panels. First and second end panels are hingedly joined to edges of the first side wall, and third and fourth end panels are hingedly joined to edges of the second side wall. The first and third end panels are hingedly joined to form a first end wall. The second and fourth end panels are hingedly joined to form a second end wall.

Abstract: In a repair kit for a broken rake arm in an automatic bowling pin setting machine, an elongated rigid sleeve is slipped over the rake arm such that the sleeve straddles the break. A fastener is threaded through the wall of the sleeve and grippingly bears against the outside surface of the rake arm. The sleeve is provided with a rigid strap that extends past the end of the sleeve in order to permit the accomodation of one end of a spring thereto. In one embodiment a right and left hand kit is required for the right and left hand rake arms of the bowling pin setting machine. Two other embodiments provide repair kits that are selectively useable as either a right hand kit or a left hand kit.

Abstract: A tray for holding IC packages including cylindrical cases having preformed leads flared radially outward from the bottom thereof with flat portions of the free ends of leads being in a common plane. The tray comprises a top plate having a plurality of funnel shaped openings in it, a rim around the perimeter of the plate, and a flat bottom. Each opening has a cylindrical bottom portion for receiving a case with leads thereon being located in the flared upper portion of the opening and below the surface of the plate. The top and bottom edges of trays are dimensioned so that the top of a first tray nests inside the bottom of a second tray. By merely turning these nested trays over, packages in openings in the first tray sit with the flat portions of leads on the bottom of the second tray. The rim limits transverse movement of packages set on the plate when the tray is shaken to cause them to fall into associated openings.

Abstract: A carrier as for tools, luggage and the like in which the carrier base is flexible fabric arranged for rolling or folding and in which a tab extending from the outer surface of the carrier base and substantially midway of its ends forms a handle when extended through an aperture provided at one end of the carrier base. A mechanically interlocking relationship is established between the handle tab and one apertured outer end edge of the base as by the use of a commercially available material such as "Velcro". Pockets or compartments are provided on the inner side of the base material in support of objects or things to be rolled up or folded in the carrier.

Abstract: A package of adhesive pads for use on corns, callouses and the like is provided in the form of a sheet of pad material such as moleskin and a relatively thin sheet of plastic adhered thereto. Both sheets are die cut along a plurality of lines to form a plurality of pad elements. The lines of cut are interrupted to provide localized frangible connections between adjacent pad elements to permit the user to remove a selected element by breaking its connections to adjacent elements.

Abstract: A reclosable hinged blister card package wherein peripheral flanges on the clear plastic blister are adhered to a paperboard card which in one embodiment is suitably cut-scored along the adhered areas to allow defined ply separation of the card for opening the blister. A hinge line is formed in the card above the bottom flange to allow hinged opening of the blister. An opening tab formed on the blister overlays an opening in the card. Locking ears on the opening tab are adapted to be pushed through the cut-out opening to lock the blister in reclosed position. Another version of the package provides reclosure and locking with pressure sensitive adhesive on the side peripheral flanges of the blister which adheres to adhesive on the underlying portions of the card.

Abstract: A nest of folds of decorative wrapping paper. Each fold includes at least one sheet of wrapping paper which has one printed decorative surface and one unprinted surface. A first fold of paper is creased longitudinally into a flat V-shaped configuration having two panels of approximately equal width. A second fold of paper is creased longitudinally into a flat Z-shaped configuration having three panels. These three panels include a center panel having the same width as a panel of the first fold and two side panels, one of which is one-third and the other of which is two-thirds as wide as the center panel. A third panel is creased in the same configuration as the second fold.

Abstract: A compound food package having a sealed, heat resistant pouch and a container therefor, is disclosed. The pouch, which contains uniformly distributed food items, has a substantially flat circumferential seam. The container is composed of semi-rigid plastic material. It contains a cavity into which the pouch is placed. The container has substantially flat rim portions. The rim portions engage the seam of the pouch and position and hold the pouch by its seam. The pouch is in intimate contact with the inner surfaces of the container, thereby counteracting inwardly directed forces and significantly contributing to the overall strength of the package.

Abstract: A novel bag closure system is provided which has considerable advantages over conventional tin tie closure systems. A specially-designed closure strip having bag material-receiving recesses is affixed to the bag and the bag is closed using the closure strip. Equipment is described for effecting the closure automatically.

Abstract: An envelope blank has a main panel and end and side flaps foldable over the same face of the main panel and having releasable adhesive on the flaps to hold the envelope temporarily closed for a first mailing and additional, preferably permanent, adhesive on the flaps for holding the envelope securely closed for a second mailing. Both the releasable and permanent adhesives being on the same face of the blank, the flaps being foldable to overlie one face of the main panel for the first mailing and foldable to overlie the other face of the main panel for the second mailing.

Abstract: A one piece screw type bottle cap, a method of applying it and a method of molding it. The cap includes an internal sealing skirt having a cylindrical portion that seals against the internal surface of the bottle neck. The skirt flares inwardly and terminates at an outwardly extending collar which is bent upwardly before applying the cap to the bottle neck, and which engages the neck to form an additional seal only after the threads of the cap interengage with the threads of the neck.

Abstract: An angleworm storage box comprised of a pair of rigid, integrally formed rectangular frame members which are right angled in cross-section and are connected by a set of corner struts, also right angled in cross-section, and having latch members extending outwardly from their ends which are thrust through apertures defined by elastic materials in the corner portions of the two frames, the frames and struts being molded of rigid plastic material and the portions adjacent the aperture-defining portions being relieved to cause the aperture-defining portions to be more elastic in order to permit the relatively large end portions of the latch elements to pass therethrough and thereafter latch thereagainst to create a rigid, simple and inexpensive box framework. Foot members carried at each corner of the bottom frame are so designed as to nest with the cover member for the box. Simple, unique but highly effective latch means is carried entirely by the cover for the box.

Abstract: A packing container is formed of a pair of cylindrically shaped axially elongated hollow bodies disposed in coaxial alignment with one fitting telescopically into the other. A row of teeth is formed on and projects outwardly from the inner hollow body and the row extends in parallel with and for the full axial extent of the inner hollow body. The teeth extend in the circumferential direction of the inner hollow body. However, the teeth extend for only a fractional angular portion of the circumferential dimension of the inner hollow body. Threads are formed on the inner surface of the outer hollow body adjacent its open end and the teeth interengage with the threads. Both the teeth and threads extend at the same oblique angle to the longitudinal axis of the hollow bodies. The teeth have a rectangular cross-sectional shape while the threads are formed as buttress threads.

Abstract: A flexible diaphragm can be moved to line opposite surfaces of a tank vehicle so that incompatible fluids alternately can be transported in the vehicle without the need for cleaning it. Both sides of the diaphragm are vented to the atmosphere automatically whenever the vehicle container is filled with fluid. The diaphragm is prevented from entering a manway on the vehicle, and an outage gauge is confined entirely within the manway to prevent damage to the diaphragm.

Abstract: An end unit intended for packaging products in an associated can or container wherein the product is of the type producing gases so as to normally increase the internal pressure within the can after the closing of the can. The end unit has a vent opening therethrough and is normally closed by a closure member which is held in contact with the container wall surrounding the vent opening by a strip of stretchable material having a memory. When pressure within the container exceeds a predetermined pressure, the closure will move out of the container sealing position under the restraint of the strip, and the container will be vented to the atmosphere.

Abstract: A lid adapted to fit over the opening of a container with an opening therein which permits the contents of the container to be poured therethrough. A tab fitted into the opening in the lid and attached toward the center of the lid. A force applying area positioned in the central portion of the lid and attached to the tab so that the tab moves in an inward direction when a force is applied to the top of the lid. When the force is released from the top of the lid, the tab then assumes its original position within the opening, thus preventing the spilling of the contents within the container to which the lid is applied.

Abstract: A non-detachable lever tab for easy open container ends with a tongue, the tip of which is staked to the central panel wall by means of an integral rivet. The lancing which forms the tongue terminates in a pair of nail piercings, which afford a high resistance to tear through. The tongue of the lever tab is coined to substantially increase its resistance to fracture under repeated bending.

Abstract: A plastic bucket lid is adapted for removable attachment adjacent its periphery to a bucket. The lid defines an annular open depression adjacent its periphery, and, positioned outwardly from the depression, an annular locking slot for receiving and holding the lip of a bucket. In accordance with this invention, radially-positioned reinforcing fins are carried by the lid within the annular, open depression to restrict the flexing of its outer wall. This, in turn, has been found to reduce the tendency of the lid to be knocked off of a bucket upon being dropped or the like. Preferably, an outwardly positioned annular projection is placed in the locking slot which defines an angle of 80.degree. to 100.degree. to the plane of the annular walls defining the locking slot for improved retention of the lid to the bucket.

Abstract: A metal container end wall is provided with a barrier-lubricant coating having a hard thermosetting resinuous base, preferably epoxy, and a particulate additive, preferably polyethylene or synthetic wax, on the external surface of the end wall to substantially eliminate metal fines and slivers caused by severing the end wall from a container with a conventional can opener.A barrier coated metal sheet is also provided.

Abstract: An attachment for a device for planting parallel rows of seeds from a single seed box is disclosed whereby selected rows can be planted or skipped as selected by the user. A frame has a linear equally spaced array of a plurality of inlet nipples, and a slide bar having a plurality of outlet nipples in register with the inlet nipples can be displaced by the distance of separation between nipples to place a different set of inlet and outlet nipples in register. Planting with the slide bar alternatingly displaced causes a row to be alternately planted and skipped to provide desired seed spacing.

Abstract: An improved liquid dispenser has two concentrically spaced cylinders with a pump plunger fitting the inner cylinder, an inlet check valve at the bottom of the outer cylinder, and an outlet check valve adjacent the top of the outer cylinder with a graduated stem extending upwardly from the plunger through a cap structure adapted to engage the open top of a liquid container. The pump plunger is restrained from moving upwardly out of the inner cylinder and a collar is adjustably mounted on the stem above the cap for setting the pump stroke as indicated by the graduations on the stem to thus provide a dispenser adapted to fit containers having a small opening therein.

Abstract: Liquid dispensing apparatus particularly for beverages has a transparent measuring chamber capable of receiving in mounting engagement an inverted bottle in communication with the measuring chamber. The chamber includes a liquid inlet port, a liquid outlet port and a downwardly resiliently biased sliding tubular valve member mounted in the outlet port. A pivotal operating member serves to urge the valve member upwards to close the inlet port, present lateral triangular apertures in the valve member to the interior of the chamber to permit liquid to pass therethrough and out through the outlet port, and open an air valve at the upper end of the valve member to permit air to enter the chamber displacing liquid leaving the chamber. An electric motor and associated gearing may be provided for raising the valve member.

Abstract: A valve for batchwise discharging a liquid material from a container having an aperture for the passage of the material. The valve comprises a valve unit (3) which is an assembly of a valve stem 4 having two spaced collars functioning as valves. The collars are fixedly connected to the valve stem at right angles thereto. The valve stem is supported and guided at points on opposite sides of the valve area, ensuring proper centering during movement of the valve stem.

Abstract: An immersion nozzle for continuous casting of molten steel, which comprises: a nozzle body comprising an aluminagraphite refractory and a refractory layer excellent in erosion resistance against a molten mold power, said refractory layer being arranged so as to be integral with said nozzle body and flush with the outer surface of said nozzle body at the outside portion of said nozzle body in contact, when the lower portion of said immersion nozzle being immersed into molten steel in a mold, with a molten mold powder layer on the meniscus of said molten steel; said refractory layer arranged at said outside portion of said nozzle body consisting essentially of, in weight percentage;Carbon (C): from 2 to 10%,Zirconia (ZrO.sub.2): from 70 to 90%,At least one compound selected from the group consisting of silicon carbide (SiC) and amorphous silica (SiO.sub.2): from 5 to 27% and,Incidental impurities: up to 3%.

Abstract: The disclosed case is of the type integrally molded from thermoplastic resin and rectangular, with a lattice floor. The outer bottom side of the floor is so formed as to facilitate nesting of the case on another. Four pillars extend vertically in two facing pairs from the floor, for separating bottles in the case sufficiently to prevent breakage in handling. The pillars of a pair are separated by a slot so that bottles can be accepted together with a carrier, with a wall of the carrier being slid into the aligned slots of the pillar pairs.

Abstract: A device for ejecting a loop of leader tape from a magnetic tape cassette, in which a portion of the leader tape is blown out of the cassette so as to form a loop, by means of a stream of air issuing from at least one nozzle which is connected to a source of pressurized air and projects into one of the apertures in the front wall of the cassette which is located in a holder.

Abstract: A fastener driving apparatus having a barrel provided with a fastening element guide which is pivotally mounted about an axis orthogonal to the barrel axis in order to introduce a fastening element therein.The fastening element guide is pivotally mounted on a support secured to the barrel, and there is provided a sleeve operative to engage the guide and pivot the same, said sleeve being moveably carried on the support for translation along the barrel axis in such manner that a relative sliding movement between the sleeve and support, causes the engagement of the sleeve and the guide for pivoting of the latter.

Abstract: A stapling machine is provided of the type which includes at least one stapling cylinder having a wire transport, a shaped disk which for the formation of the staples bites into a peripheral recess provided in the stapling cylinder, and a fixed staple guide which, with reference to the rotational direction of the stapling cylinder, is positioned after the shaped disk, projects into the peripheral recess and is underrun by the finished staple. The stapling machine is characterized in that the staple guide has, in the area of its surface which is underrun by the back of the staple, a post-bending edge which bites deeper into the recess in the stapling cylinder than does the outer periphery of the shaped disk.

Abstract: Sheet cladding is applied to a substrate by applying powdered glass to the seams of the cladding after it has been assembled to the substrate. A vacuum at which the glass can be melted without decomposition is established and the glass is melted in the presence of preselected gas. Thereafter, the sheet cladding and the substrate are diffusion bonded.

Abstract: A method and apparatus is disclosed for monitoring the parameters of a rock bit which utilizes electronic sensing principles. The use of these sensing devices will provide continuous measurement of the rock bit through remote monitoring equipment. The sensing devices monitor the rock bit parameters during the electron beam welding process to assure that both the height and the gage of the rock bit remains within set tolerances while the welding process is taking place.

Abstract: A generally cylindrical, tub-shaped carton having a flat bottom, and particularly suited for containing butter or margarine, is formed of a single paperboard blank, and is characterized by having a generally cylindrical-shaped side wall formed of two panels, each of which is integrally formed with and hingedly connected to one of two opposing sides of a hexagonal horizontal base portion. Intermediate each of the remaining sides of said hexagonal base portion and a side wall panel is an articulated webbed corner which, in the erected position of the carton, is wholly disposed within the tub-shaped carton in a flattened relationship against said side wall panels to reinforce the side wall seam of the tub-shaped carton. The hexagonal base or bottom of the carton is flat, thereby offering a more stable carton having greater capacity at a reduced cost of manufacture, and also offering better sealing of the carton during packaging of the butter therein.

Abstract: A container lid is formed from a disc having thin walls of uniform thickness throughout which span and overlap the open end of the container. The overlapping portion includes a downwardly depending resilient skirt that partly overlies in engaging relation one surface of the sidewall adjacent the open end. Complementary engagement means are formed in the skirt for releasably engaging lid engagement means such as a continuous bead or groove that comprise an integral part of the container. A reclosable tear strip defines an opening through which the contents of the container may be discharged and forms an integral part of the disc and the skirt. The strip has sides defined by fracture lines formed in the disc, an outer end defined by the lines extending into the skirt to include the complementary engagement means and an inner end forming a hinge along a weakened line in the disc.

Abstract: A bottom-unloading bulk container having a bottom closure and having a top closure that includes flaps hinged to the body walls. Openings in the side walls are proportioned to receive the tines of a forklift truck. These openings are located a predetermined distance below the top edge of the sidewalls, and longitudinal wooden slats are located just above these sidewall openings. Bands encircle the body and the top and bottom closures at locations just interior of the sidewall openings. The container can be filled through an inlet provided by partly unfolding the top flaps after banding. After reaching its destination, the filled container can be lifted and transported to an unloading location by a forklift truck whose tines extend through the sidewalls openings and its contents dumped through the bottom opening upon release of the encircling bands.

Abstract: Boxes e.g. for fruit and vegetables are described which consist of a base and sidewalls folded up from the base. The ends of the sidewalls are held in position relative to one another and relative to the base of the box by means of a number of corner posts, e.g. four for a rectangular box. Each corner post is produced from an extruded section and can simply be slid on to the two adjacent ends of sidewalls when they are held substantially in the upright position. Means are provided to stop lateral movement of one corner post relative to the one below it when two such boxes are stacked vertically aligned. Such means may comprise shaping on the end of each corner post or intermediate stacking pegs which engage e.g. the top of one corner post and the bottom of the vertically adjacent next box.

Abstract: A centrifugal separator having an upper paring chamber 5 and paring disc 6, a lower paring chamber 8 and paring disc 9, an air seal 10, 11 over the upper paring chamber and paring disc, and a radially extending overflow passage 15 disposed between the upper and lower paring chamber for discharge of liquid overflowing from either paring chamber, is provided with a shutoff valve 17 in the overflow passage 15 which is urged to the closed position by centrigual force and has a shoulder 20 for exposure to liquid in the overflow passage when the valve is in the closed position so that centrifugal force of liquid in the overflow passage urges the valve toward the open position. The shut-off valve prevents air from entering through the overflow passage.

Abstract: A centrifugal fluid cleaner consists of a vertical hollow shaft fixed rigidly to a base and provided with conduits for the supply and removal of fluid in the upper part of the shaft and a cylindrical rotor rotatably mounted on the hollow shaft. The rotor comprises a casing accommodating an inside sleeve installed coaxially with the hollow shaft and carrying a band coiled around the sleeve in a helical manner, spacers, installed between adjacent turns of the helical band so as to form a plurality of slots within the helical band to permit passage of the fluid, and impellers installed at both ends of the sleeve so that the lower impeller is located in a bottom cavity communicating with the fluid inlet conduit in the hollow shaft and the upper one in a chamber communicating with the fluid outlet conduit in the hollow shaft.

Abstract: An automatic temperature responsive assembly for ventilating through a roof a confined space to the atmosphere whereby heat buildup in the confined space may be released from the confined space or fresh air permitted to enter therein. The assembly comprises housing means adapted to be coupled to the roof of the confined space and having an opening extending therethrough with cover means operatively associated with the housing means and mounting means operatively associated with the housing means for pivotally securing the cover means thereto, so as to be movable between a generally open position and a generally closed position for enclosing the opening. A temperature responsive drive assembly is mounted to detect temperature changes in the confined space and adapted to actuate in response to temperature changes within a predetermined range, and camming means is pivotally secured relative to the housing means and including a camming surface thereon for engaging the drive assembly.

Abstract: An apparatus for supplying conditioned air at a substantially constant temperature and humidity. The apparatus includes a supply duct coupled to a source of supply air for carrying the supply air therethrough. A return duct is coupled to the supply duct for carrying return conditioned air therethrough. A temperature reducing device is coupled to the supply duct for decreasing the temperature of the supply and return conditioned air. A by-pass duct is coupled to the supply duct for selectively directing portions of the supply and return conditioned air around the temperature reducing device. Another by-pass duct is coupled to the return duct for selectively directing portions of the return conditioned air around the supply duct and the temperature reducing device.