Abstract: This invention comprises a combined cellulose sludge dryer and burner in which the drying procedure is positively and automatically controlled in response to the moisture content of the dewatered raw sludge supplied to the dryer headbox and carried through a drying chamber to discharge a dried sludge having but a 15% moisture content and suitable to be burned to provide the hot air for the drying procedure. With the sludge being critical as to charring, a temperature of 300 degrees Fahrenheit to prevent pre-burning and charring of the sludge has to be maintained in the drying chamber and positive and automatic control for the hot air to maintain the temperature is done by checking differences between input and output temperatures of the dryer and diluting the air produced by the burner by the use of a heat exchanger and air dampers. The extracted wet air from the drying chamber and diverted over-supply of air to the drying chamber are delivered through a scrubber and chimney to the atmosphere.
February 9, 1993
Date of Patent:
October 25, 1994
Northrop Engineering Corporation
Andrew W. Elcik, John J. Devine, John H. Northrop, Kurt T. Dunn, John F. Healey
Abstract: The present invention makes beneficial use of, rather than replacing, a vehicle's snowplow headgear by combining the headgear with a tire/wheel mounting assembly. A headgear includes a lower horizontal support member parallel to the ground at about frame level, and a pair of substantially vertical uprights connected to the ends of the horizontal support member to form, when viewed from the front, a U or O-shaped support headgear structure. A power ram with a base is normally removably secured in a receiving socket on horizontal support member that forms the bottom of the "U/O" of the headgear. That ram is removed and the tire/wheel assembly is securely mounted in its place.
Abstract: An automobile sun shade is described in which a plurality of elongated blades are pinned together at one end. The blades are provided with a plurality of openings intermediate the ends thereof. The joinder tape is woven through the openings in each blade to permit the blades to be opened in a fan-like manner in either direction or folded to occupy the space of a single blade.
Abstract: An aperture stop control device for a zoom lens system includes a variable aperture stop, a first sensor for determining the diameter of the aperture stop and providing a first electrical signal representative of the diameter of the aperture stop means and a second sensor for generating a second electrical signal indicative of a designated F number. A signal generator provides a third electrical signal indicative of the focal length of the zoom lens system. A computing circuit computes an output electrical signal as a function of the second and third electrical signals to control the diameter of the aperture stop for automatically maintaining a designated F number during a zooming operation.
Abstract: An improved lightweight diffuser assembly having a plenum chamber formed of fiberglass laminae is provided. The diffuser assembly is universally adapted for interfacing with various size conventional ducts of an air delivery system. The plenum chamber has a variable density across its surface and further includes a fibrous textured interior surface to optimize the sound absorption characteristics. Sheets of laminae fiberglass impregnated with uncured phenolic binders are placed in an appropriate die mold cavity and subjected to both compression and heat. The plenum chamber is cured in approximately a temperature of 700.degree. F. to 900.degree. F. for a time period of approximately 25 to 45 seconds to provide an interior fibrous textured surface. Carbon black and an interior sealing sheet can be introduced into the fiberglass laminae prior to compression.
Abstract: An eye fundus plethysmograph assembly is provided for determining variations in the amount of blood present at the fundus of the eye. A source of at least a first and second wavelength of light energy is specifically directed into a subject eye for reflection from the retina or fundus of the eye. The reflected light is directed at a receiving element that can produce a first output signal representative of a reflected first wavelength and a second output signal representative of a reflected second wavelength. A processing circuit is provided for subtracting one of the first and second output signals from the other to provide a representative measurement output of the amount of blood in the blood vessels adjacent the eye fundus. The output signals can be recorded or displayed in any desired form to facilitate the interpretation of the amount of blood present.
Abstract: The present invention provides a sound producing device that can be combined with a toy hobby horse. A whinny or neigh sound can be produced by child operated movement of reins to stress and subsequently release a weight loaded spring lever. A coil spring is positioned to contact the spring lever for the generation of the noise. A one-way stop mechanism can retain the weighted spring lever until it is placed under sufficient stress by the operator to effectuate its release.
Abstract: A compact optical lens barrel mechanism for relativenonrotational displacement of a series of lens elements forming an optical system is provided. Lens elements can be mounted for selective subdivision into operative lens groups for both focusing and introducing a variable soft focus condition. The barrel mechanism includes a mounting cylinder having appropriate linear alignment elements. A translational cylinder is rotatively journalled within the mounting cylinder. Three lens mounting members can be relatively movable and are designed to each carry a predetermined number of lens elements. The rear lens mounting member can be moved by the translational cylinder to provide a variable amount of spherical aberration to produce a soft focus condition. An exterior focusing ring and a soft focus condition ring can be rotatively mounted relative to the stationary mounting cylinder for linearly moving the respective mounting members.
Abstract: An electrical apparatus housing assembly unit is constructed from mounting columns, a top and bottom panel member and two side panel members. The mounting columns serve as structural components of the electrical housing assembly unit and also as members to which electrical components and the like may be removably mounted. Additional component parts such as facias and spacers may also be mounted to the mounting columns. The facias and spacers, in addition to aesthetic value, provide additional strength to the electrical apparatus housing assembly.
Abstract: A toy vehicle assembly capable of controlled locomotion in response to variations in frictional resistance along a support surface and method is provided. The support surface is a relatively low frictional surface such as a flexible sheet of polyethylene. A subjectively determined higher frictional guide pattern can be placed on the surface such as by a wax marker. The toy vehicle has a pair of driving front wheels and a power rear wheel. The axis of rotation for each of the wheels are non-parallel to the other axes. A coefficient of friction of the power rear wheel is greater than that of the front control wheels. The driving power wheel can propel the vehicle while the front control wheels can respond to variations in the frictional resistance of the support surface to control the direction of the toy vehicle. The frictional path can be subjectively varied and is preferably made from a water soluble material that can be removed from the support surface.
Abstract: A recessed handle assembly adapted for use in cases, panels and more particularly in electrical housing assembly units is disclosed. An aperture is provided in a wall of an electrical housing assembly unit. Into the aperture is placed a handle member which is preferably U shaped and is equipped with a pair of flanges. The flanges engage the exterior surface of the panel. A keeper member which also has a pair of flanges is mounted between the panel and the handle member. The keeper member is of such dimensions that it tightly fits between the panel and the handle member while the flanges of the keeper member engage the interior surface of the panel. The whole assembly is held together by a spring force which results from tight fit of the keeper member between the panel and the handle member. The handle assembly of this invention can be mounted into a panel in a very short time without the use of tools or mechanical skills.
Abstract: A combination vehicle toy and projectile firing mechanism is provided. The vehicle body member has a configuration that simulates a handgun when a plurality of appended members that provide locomotion are removed from the body member. A pair of guiderails and a pivoted lever trigger is mounted on the bottom of the body member and cooperates with a cross bar member to propel an arrow-like projectile. Preferably the body member has a tricycle configuration and an auxiliary motor assembly can be removably attached to provide independent locomotion.
Abstract: A wide angle zoom lens system for use with a 35 mm single lens reflex camera is provided. The zoom lens system is relatively compact and includes two lens groups that can be relatively displaced along the optical axis to provide variation in focal length as desired. The first lens group has a negative refractive power and the image side second lens group has a positive refractive power. The relationship of their refractive powers has been selected to provide adequate correction of aberrations while maintaining the size, weight and compactness required in a modern zoom lens system with wide angle capability.
Abstract: A pressure gauge assembly for aircraft tires and the like having a helical coil bourdon tube sensor capable of indicating a pressure differential between a monitored source of pressure and a calibrated reference source of pressure. The reference pressure is applied to one surface of the bourdon tube coils while the monitored pressure is applied to the other surface of the coils. The resultant movement is a linear indication of any pressure differential. A valve assembly can be provided with the pressure gauge assembly to permit fluidic access to the monitored pressure. If the volume of the monitored pressure is variable such as an aircraft tire, the secondary source of calibrated pressure can be provided with a predetermined pressure relative to the normal tire pressure to compensate for any volumetric changes in the tire during operation. In an alternative embodiment, the bourdon tube can be used to monitor the pressure in a fire extinguisher for indicating any leaks.
Abstract: A toy vehicle includes an optical sighting system having a lens, a focusing screen upon which images are focused by the lens, and a mirror to invert and transmit the images upward out of the toy body to a viewer. The toy vehicle further includes a complementarily firing mechanism for launching a plurality of projectiles at sighted targets. Additionally, the toy vehicle can also support a detachable plane-like device which includes a wing, a propeller, and a means to drive the propeller.
Abstract: A toy including a number of press-fitting parts configurable as a rocket plane is provided. A number of the parts include optical elements which may function as a kaleidoscope, or, in a second configuration, as a periscope. Some of the parts may be assembled to form a blow-gun for discharging a toy projectile at a toy target.
Abstract: An optical scanner system such as a projector for the continuous transmission of images to provide image immobilization is provided. The optical scanner system includes an illumination system, a scanner mechanism, and a projection lens system. The scanner mechanism is capable of creating virtual images of successive film frames with at least one virtual image point of each film frame positioned on a stationary locus point and at least another virtual image point offset from the stationary image locus point and relatively movable during a scanning movement. The scanner mechanism can, for example, be of a reflective or refractive polygon geometry. The specific parameters of the projection lens system and illumination system recognizes the inherent limitations of the dynamic keystoning aberration in scanner assemblies and seeks to nullify its effect in the projected real image. The projection means is of a telecentric design.
Abstract: An optical assembly, such as binoculars, having an objective and ocular lens system is focused by the axial displacement of at least one lens system on the optical axis. A manually operated actuator is translationally displaced on the binocular housing to impart the focusing movement. Preferably the actuator is a segment of flexible belt connected to a forked cam arrangement for actually displacing a focusing lens. The binocular housing along with the cam focusing lens system can be both aligned and retained in an operative mode by an elongated shaft extending through the segments of the binocular housing. The binocular housing is split and rotatable about the shaft within the range of movement of the flexible belt.
Abstract: A telephoto lens system having improved focusing capabilities is provided wherein a first lens group of an overall positive refractive power is mounted on the object side of a second lens group of an overall negative refractive power. The lens components of the second lens group are capable of providing a simplified focusing mode of operation. The second lens group can comprise a first negative lens component and an image side second positive lens component. The second positive lens component is movably mounted for focusing the entire lens system on relatively close objects as its translates toward the object side. The first lens group is spaced a distance from the second lens group having an absolute value greater than 0.15f wherein f is the focal length of the entire lens system. Additionally, the composite absolute values of the focal lengths of the front lens group and the negative lens component of the second lens group is greater than 1.2f.
Abstract: A variable soft focus lens system particularly adapted for photography is provided. The soft focus lens system includes at least two lens groups defining a meniscus shaped air space there between. The relative width of the air space can be variable by movement of one of the lens groups relative to the other. This movement can introduce a controlled amount of spherical aberration to provide within certain parameters a soft focus image with an acceptable Petzval sum and flatness of the image plane. Various embodiments of the present invention within the inventive parameters can be utilized and include both stationary and variable soft focus lens system.