Abstract: A safety belt retractor has an extended low tension range dual tensioning and rewind means including a reel rewind spring means for biasing the reel in a belt rewind direction under the urging of a first bias, tension reducing means for providing a second rewind bias of a lower value on said reel than the first bias to provide a reduced tension on a safety belt, activating means for activating the tension reducing means in response to reel rotation in a predetermined manner and means for deactivating such tension reducing means in response to reel rotation under the urging of the second bias including the provison of a spiral cam surface mounted to the retractor frame and presenting a spiral surface having an extent of more than one whole revolution about a spiral center, a cam follower provided to be moved along the spiral surface, means for driving the cam follower along such cam surface in response to rotation of the reel and means operated by radial displacement of the cam follower relative to the spiral

Abstract: A safety belt retractor has a belt storage reel biased toward belt wound condition by conjugate return spring means comprising a first biasing spring connected to the reel for biasing said reel at a relatively low level for comfort zone torque rewind mode, a second biasing means for biasing the reel toward a belt wound condition independently of the first biasing means and means for releasably connecting the second biasing means to the reel whereby the reel is normally biased toward belt wound condition under the urging of both the first and second biasing means, but on releasing said second biasing means from said reel, the reel is biased to belt wound condition under the relatively low rewind torque of the first biasing means.

Abstract: A hand-held device for packing grease into wheel bearings including a housing having a grease inlet, a spring-biased piston and a cap closing off the bottom of the housing. The cap and piston are adapted to maintain a wheel bearing to be greased in a fixed position in the housing. Ports in the piston cooperate with the grease inlet for introducing grease under pressure above a bearing positioned in the housing for greasing the same. The cap is separable from the housing so that, after greasing the bearing, the cap may be removed and the bearing quickly and easily located. An opening may be provided in the cap for evacuating excess grease out of the housing and an adapter may be provided for quickly and easily cleaning the interior of the device.

Abstract: An apparatus is disclosed for exothermically obtaining hydrogen or hydrogen peroxide from water vapor. The apparatus includes a mass of reactant which is heated to a high temperature at which it can combine with the oxygen in water vapor exothermically. The separation of the hydrogen and oxygen is accelerated through the use of a combination host and sensitizer material which is present near spaces or voids included in the reactant. The reactant is heated to an elevated temperature such as 1000.degree. K and steam under several atmospheres pressure is applied to the reactant and enters the spaces included in the reactant. The water vapor has certain particular absorption bands in its absorption versus frequency characteristic. Each of the sensitizers which are located adjacent the voids in the reactant, in one embodiment forming part of the walls of small cylindrical tubes, has an energy output in the excited state which is precisely in one of the energy absorption bands in the water vapor characteristic.

Abstract: A padlock construction which is adaptable to selectable lock cylinder and key combinations includes a hollow padlock body for receiving a selected lock cylinder, a cylinder guard for removably retaining the lock cylinder within the padlock body, a removable shackle bar and a compatible locking pawl for mating interengagement with the lock cylinder and for removably retaining the shackle bar within the padlock body.

Abstract: An improved safety apparatus for automatically sealing hydraulic lines within a sub-sea well casing when said casing is disconnected from an associated well head connector and Christmas tree assembly, has mandrel means associated with a well head connector assembly and valve means generally coaxially aligned within and to the casing means for controlling fluid flow through associated hydraulic lines, the valve means being moved into a valve-opened position by the mandrel means as the well head connector assembly is landed on the well casing head. Bias means associated with the valve means are provided for urging the valve means into a valve-closed position to seal the hydraulic lines when the mandrel means is withdrawn from the valve means. Hydraulic fluid flow is through passages through the mandrel, the valve means and associated portions of the well head connector and casing head, respectively.

Abstract: A safety belt retractor having a belt storage spool biased toward a belt storage position is provided with means for selectively applying a portion of the rewind torque of the spool rewind spring back on to the spool in a belt unwinding direction to produce a reduced torque effect upon the spool.

Abstract: A tubular wall is axially telescoped over an end closure and a wall outer end portion is secured to the end closure so that complete separation between the wall and end closure will not take place up to internal reservoir pressures spaced above a predetermined pressure, but at the same time, such securement permitting fluid flow outwardly between the wall and end closure at reservoir pressures at least as low as the predetermined pressure. A wall inner end portion is formed in an annular zone arcuately inwardly against a resilient sealing ring positioned in an end closure arcuate recess compressing the sealing ring against the end closure.

Abstract: A variable value, constant volume fluid flow control device has damper means for regulating fluid flow through a conduit to a zone and damper control means for regulating the damper means comprising fluid supply means for diverting a portion of the fluid flow being controlled to the damper control means, transducer means having a first and a second chamber and being responsive to pressure differentials between the first and second chambers for moving the damper means, means for directing the portion of fluid flow to the first and second chambers, vent means for selectively venting either of the first and second chambers and vane means responsive to fluid flow velocity within the conduit for operating the vent means to operate the transducer means. Bias means are provided for biasing the vane means against a direction of the fluid flow through the conduit such that the vane means returns to a neutral position under conditions of optimum fluid flow velocity.

Abstract: A safety belt retractor, having a webbing storage means biased toward a webbing stored condition and associated safety belt webbing, is provided with latching means for preventing movement of the storage means toward a webbing stored condition upon protraction of the webbing to relieve tension in the webbing due to the bias of the storage means and additional means for providing a limited low tension travel of the webbing while the storage means is prevented from moving by the latching means. Means are supplied for deactivating the latching means upon protraction or retraction of the webbing beyond the limits of said limited low tension travel to provide for an automatic resetting of the latching means in different positions of use of the webbing and to allow for retraction of the webbing by the webbing storage means to said stored condition when the safety belt is released.

Abstract: A device for longitudinally slitting generally cylindrical objects has body means for supporting a cutting element, alignment means for positioning the cutting element relative to the body means, bearing shoulder means for longitudinally aligning the cylindrical object with respect to the cutting element and positioning the cylindrical object such that a surface thereof contacts the cutting element and protective means adjacent the cutting element for protecting the cutting portion of the cutting element when the device is not in use and, at the same time, being moveable to expose the cutting portion of the cutting device when a cylindrical object bears against the bearing shoulder means.

Abstract: Pressure sensing apparatus in which a mounting structure carrying a thin, pressure sensitive resistance wire is lodged in a gas passageway extending through an outer member. The mounting includes a relatively large end portion which extends substantially across the passageway to both shield the wire from direct impact by passing gas, and limit the flow of such gas by occluding the passageway. The secure wire mounting apparatus makes possible the use of very thin wires and a corresponding increase in pressure sensitivity resulting from temperature and gas thermal conductivity. The wire diameter is no more than about 0.00005 inch, making possible results comparable to much more expensive mass spectrometer techniques.An overall pressure sensing system is described in which the sensor is coupled with electric circuitry to produce transient and/or absolute pressure readings over an approximately nine decade pressure range. Transient readings of gas temperature and thermal conductivity may also be made.

Abstract: One end of an oscillating saw blade has a notch, and spaced from the notch is a hole through the blade. The head of the tool has a slot having a shaft extending through the rear end of the slot for receiving the notch. A pin extends partially into the slot for receiving the hole. A closer in the form of a cam is cammed into and out of the slot for moving the hole on the blade onto the pin and moving the end of the blade having the hole and the notch against the bottom of the slot. The cam closer is locked in place to lock the blade in the slot. A handle is attached to the cam closer for manually rotating the cam, and the cam has an overcenter orientation where the resilient forces from the blade pushing on the cam tend to rotate the cam to a closed position. A stop is provided to intersect the handle and stop it in its locked position. A jaw of resilient material may be provided between the blade and the bottom of the slot to spread forces from the cam on the blade.

Abstract: An inertia-responsive vehicle seat back latch mechanism for a vehicle seat assembly having a seat back pivotally supported for forwardly tilting movement, wherein said latch mechanism includes an unattached, inertia-responsive mass which moves in response to changes in vehicle velocity such that it is disposed in a position to engage a latch and thereby prevent forward tilting of the seat back. In the preferred embodiment of this invention, the unattached, inertia-responsive mass is a roller contained within a roller guide.

Abstract: A pump for concrete or other moist flowable material containing aggregate, including a hopper, a pair of alternately stroking pump assemblies below the hopper for forcing concrete via a junction valve into a common output line, and a loading system for alternately charging the two pump assemblies with concrete from the hopper. The loading system includes a conveyor and a pair of generally vertical charging chambers having lower outlet ports communicating with inlet openings in the respective pump assemblies, and upper portions extending into the hopper through the lower hopper wall and terminating upwardly in open tops disposed above the highest possible level of concrete in the hopper.

Abstract: A wheelchair comprises a pair of frame members of one piece of solid material. A well indented into each frame member accommodates an axle for mounting a wheel therein. A pair of braces supports the frame members in a spaced-apart position and allows the frame members to be brought together. A vertical pivot pivotally mounts the brace members with respect to each other at a central portion of each brace member. Each brace member pivots with respect to a frame member about a vertical axis on an anchor. The other end of each brace member is releasably anchored to the frame member opposite the one to which the one end of the brace member is anchored. A brake on the frame moves against the wheels to lock them, and a hill holder connected to the brake prevents movement of the wheels in one direction. A brake handle is movable between at least two positions, a locking one and a hill holder one. The handle is mounted in an indentation on each frame member adjacent the well.

Abstract: In a system for combining foreground video images with background video images, using the so-called "blue-screen" (or special background color) technique, a comprehensive control system is provided which accommodates a broader range of foreground objects, permits the careful coordination of control of the blue of the foreground with the level of the background signals, and also permits precise shadow control in accordance with the artistic requirements of the scene to be produced. To properly control the level of the blue from the foreground and to properly distinguish between situations where the video signal arises from solid or partially transparent actual foreground objects and where it originates from the blue screen, various electrical adjustments are provided for accommodating different types of foreground objects.

Abstract: The power supply for an airborne pulse radar includes an unfiltered source of 400 cycle AC power connected to a full wave rectifying circuit including two diodes associated with each phase of the three phase input circuit. In addition, three SCR's are employed for controlling the operation of the rectifiers. During normal operation of the pulse magnetron power supply, the control electrodes of the SCR's are biased to the conducting or enabled state by a small floating DC voltage which is obtained from a small DC power source which includes a rectifier circuit connected to the floating secondary of a low voltage transformer. When a fault is sensed in the magnetron pulse circuitry as indicated by the drawing of excessive current, a switching circuit is activated which removes the enabling voltage across the SCR's, so that the input rectifier circuitry is disabled, thus preventing burn-out of components included in the pulse generation circuitry.

Abstract: The invention provides the benzhydrylsulphinyl derivatives of the formula:(C.sub.6 H.sub.5).sub.2 CH--SO--(CH.sub.2).sub.n --R Iwhere n is 1, 2 or 3 and R is C(.dbd.O)NHOH, C(.dbd.NH)NH.sub.2, C(.dbd.NH)NHOH, 2--.DELTA..sup.2 -imidazolinyl or NR.sub.1 R.sub.2 (where R.sub.1 is H or C.sub.1 --C.sub.3 -alkyl and R.sub.2 is H, C.sub.1 --C.sub.3 -alkyl, or CH.sub.2 CH.sub.2 OH, and R.sub.1 and R.sub.2 considered together can form, with the nitrogen atom to which they are bonded, a N-heterocyclic group of 5 to 7 ring members, which can be substituted and can contain a second hetero-atom such as O and N), and their addition salts. These products are useful in therapy for treating disturbances of the central nervous system.

Abstract: A test means for a smoke detector of light responsive type which includes a light source, a smoke chamber, a light responsive device sensitive to a light beam reflected from a preselected density of smoke in the smoke chamber for actuating an alarm signal, the test means including the same light source and light responsive device and having a separate test light path other than through said smoke chamber with light modifying means in the test light path to simulate a preselected smoke density. The test means includes a normally closed gate for said test light path, the gate being manually opened to transmit light along said test path to the light responsive device to cause actuation of the alarm in the absence of smoke in the smoke chamber.