Abstract: An operator for controlling movement of a window sash relative to a window frame, including a drive gear pivotable about a central axis substantially perpendicular to one side of the window frame and drivably linked to move the sash, a connector defining first and second pivot axes intersecting at a point and rotatable around the intersection point, a worm pivotable about an axis substantially perpendicular to the central axis and drivably engaging a portion of the drive gear by a helical thread having variable height peaks lying in an annular orientation substantially conforming to the annular orientation of the drive gear portion, and a drive input shaft rotatable about a shaft axis intersecting the worm axis at an angle. The worm, connector and drive shaft are secured whereby the connector is pivotable relative to the worm about the first pivot axis and the connector is pivotable relative to the drive shaft about the second pivot axis.

Abstract: Device for connecting two drive elements 2 and 3 whose engagement flanks 20, 30 opposite one another are rollable positively on one another, with one drive element 3 being connected with at least one support surface 4 with a base 1 whose total length is less than the length of the drive element 3. Drive element 3 forms a curved spring path which passes through the (at least one) support surface 4 and directs engagement flank 30 of one drive element 3 toward engagement flank 20 of the other drive element 2.

Abstract: A casement operator for a window has a deployment linkage connectable between the window frame and the base and operable to cause movement of the window sash. A gear drive drives the deployment linkage, which coacts with a sash lock and a lock linkage having a window-actuated trigger. A plurality of rigid links are in pivotal engagement with the deployment linkage and in driving engagement with the gear drive, and a tie rod is disposed intermediate the rigid links and the sash lock. A trip lever with a trigger extending beyond the window frame is pivotally secured to the base and engageable with the lock linkage for restricting the movement of said lock linkage during a non-locking mode of operation of the operator.

Abstract: An opening and closing device for outwardly pivoting frame closures, such as windows includes an operating handle, such as a crank or the like, which is connected to the pivoting frame drive mechanism fitted in the groove of the lower edge of the fixed frame. This drive mechanism includes a translation mechanism driven by the operating handle and actuating the rotation mechanism of the pivoting frame. The mechanism for rotation cooperates with a secondary translation element connected either directly or through a secondary arm to the pivoting frame in order to displace the latter's rotation axis in a plane parallel to that of the fixed frame.

Abstract: A window operator and assembly method therefor wherein a stacked pull arm and gear are rotatably mounted on a bushing carried by a mounting base and the gear and pull arm are assembled to the mounting base with a controlled clearance independent of the tolerance of these components by use of a hardened metal bushing. The hardened metal bushing is forced into the deformable metal of the mounting base whatever distance is necessary to locate an exposed end of the bushing a fixed distance beyond the uppermost of said gear and pull arm and provide a surface against which a washer may be mounted and which overlies the pull arm and gear to hold the components in assembled relation with the controlled clearance.

Abstract: Apparatus for causing a rotatable actuator to effect unlocking of a window latch and then to swing the window sash open when the actuator is rotated in one direction. When the actuator is rotated in the opposite direction, it first causes the sash to swing closed and then causes the latch to lock and hold the sash in its closed position. In one embodiment, the actuator is effective to swing an arm and shift a slide for purposes of moving the sash and operating the latch. In another embodiment, the actuator rotates a lead screw which advances nuts for moving the sash and operating the latch.

Abstract: A window opening mechanism is disclosed which moves the entire window sash outwardly from the window frame in a plane parallel to the plane of the frame. The mechanism for accomplishing this includes a pair of pivoted L-shaped lever arms on each side of the window. The short legs of these lever arms are substantially shorter than the long legs, and the ends of the short legs are pivotally attached to the window frame relatively close together. An operating mechanism is provided for moving the elbows of the lever arms toward and away from one another, and the ends of the long legs of the arms are pivotally connected at spaced apart points on the window sash. As the elbows of the levers on both sides are moved toward one another, the window sash is pulled toward the frame. When the elbows are moved away from one another, the pivoting action of the lever arms causes the window sash to be moved outwardly from the frame to provide a "stand-out" opening of the window.

Abstract: A time-temperature indicator, particularly adapted for use with closed sterilizing or cooking vessels, such as pressure cookers and sterilizers, to indicate at what temperature and for how long material contained within the vessel has been heating or cooking, is disclosed. The indicator uses a material such as a thermochromic material which changes color at a predetermined temperature, and is constructed to provide readings around a 360.degree. angle. The indicator may, for example, be constructed as a knob on the lid of a pressure cooker or sterilizer or the link or may be attached to or as a replacement for an existing knob.

Abstract: A control mechanism for opening and closing a window sash or like element pivotally mounted in a frame. The mechanism has a drive member mounted for rotation with an elongated drive shaft and a housing mounted on the drive member for rotation relative to the drive member and the elongated shaft. The housing includes a retaining mechanism which is subtended by a first portion of the drive member. A rod for reciprocating movement in response to rotation of the drive member is located between the retaining mechanism and the first portion of the drive member and held in direct contact with the drive member by the retaining mechanism.

Abstract: A self-locking window operator having one or more arms transmitting a force from a drive mechanism to a window sash for positioning thereof and with the arms mounted and driven for rotational movement in positioning of the window sash and also mounted and driven for linear movement when the window sash is closed to achieve a locking action between the window sash and the window frame by engaging a locking mechanism which locks the window against high window-opening loads.

Abstract: An operator for a casement-type window having a frame and a sash mounted by a slider adjacent an edge of the sash for rotational opening and closing movement about a slider pivot axis with linear movement of the slider. The operator has a first sector gear fixed to the sash with the gear center offset relative to said slider pivot axis and a second gear meshing with the sector gear and functioning as a drive gear with a first link functioning to hold said gears in meshed relation and a constraining link connectable between the sash and the window frame with the constraining link and said first link acting to guide the opening and closing movements of the sash.

Abstract: Right and left hand casement windows employ a simple and compact operating linkage which can be installed either to the right or to the left of a center mounted gear drive, thus accomplishing universal operation of left or right hand windows through a structurally identical linkage. Locking tabs provided on an operator link of the mechanism coact in right or left hand mode of operation with locking projections on a stabilizer link to assure positive and secure closing of the window even in cases where the primary jamb-mounted window sash latch is unfastened.

Abstract: An operator for a casement-type window having a sash mounted adjacent one edge thereof for combined pivoting and linear movement relative to a window frame with the operator having a member movably engaged with the sash adjacent an outer edge thereof for imparting opening and closing force to the sash. The operator includes linkage and gear structure connected to said member and operable in response to manual movement for moving said member in a path which closely approximates the movement of the sash outer edge to cause said member to always act adjacent the outer edge of the sash.

Abstract: An operator for a casement-type window sash which is mounted adjacent one edge thereof on slider structure for combined pivoting and linear movement comprising, a first structure for causing said combined pivoting and linear movement including a first linkage having an operating arm and a connecting link which is pivotally connected to the operating arm intermediate the ends thereof and also pivotally connected to said sash and a constraining link pivotally connected to a window sill and to the sash at a distance from said edge.

Abstract: An operator for a casement-type window having an openable sash mounted adjacent one edge thereof for combined pivoting and linear movement of said sash edge relative to a window frame. The operator includes a first operator arm rotatable about a fixed axis and having an end adapted for movable engagement with the sash at a distance from said one edge of the sash to impart a rotational force to the sash, a second operator arm and a connecting link pivotally connected between said second operator arm and the sash adjacent said edge, and said second operator arm being pivotally mounted on the first operator arm, with there being intermeshing drive gears fixed one to each of said arms, with one gear being a drive gear and the other gear being a driven gear.

Abstract: An improved vent operator for controlling the position of an edge opening vent in the roof of a recreational vehicle or the like is disclosed. The vent operator is coupled to an electric motor, manual jamb or crank or the like, and comprises a set of reduction gears and drives two sector arms which raise or lower the vent cover. The gear reduction is accomplished by spur gears which have good mechanical properties. The cost of the entire apparatus is minimized by making the gears from pressed metal, the sector arms from stampings and the housing from castings. The result is a reliable vent operator that can be produced economically in commercial quantities.

Abstract: A multi-directional vent for the ventilation opening of a vehicle includes a vent frame having a vent cover pivoted at its front side to the frame and having an air intake opening in the front of the vent cover. A door is pivoted to the vent cover to selectively close or open the vent cover intake opening. Gear and bell crank operators are provided to pivot the cover about its hinge connection to the frame and to pivot the door about its hinge connection to the cover. The frame is screened and the operators extend through the screen to enable operation from inside the vehicle. With the door open and the vent cover closed a conventional scoop type operation is provided. With the door closed and the vent cover open a conventional pivoted ventilation operation is provided. With both the door and vent cover open ventilation is provided in all directions when the vehicle is at rest, and when in motion a venturi effect is achieved to extract air from the interior of the vehicle.

Abstract: There is provided an improved operating roof vent of plastic such as translucent resin for mounting in a vent opening of a roof. An inner one piece combination screen and garnish member telescopically mates with an outer one piece cowl member. A combination one piece cover and hinge closes the cowl member, with the hinge being secured to the cowl member to provide for swinging opening and closing of the cover.

Abstract: A casement operator for a window has a deployment linkage connectable between the window frame and the base and operable to cause movement of the window sash. A gear drive drives the deployment linkage, which coacts with a sash lock and a lock linkage having a window-actuated trigger. A plurality of rigid links are in pivotal engagement with the deployment linkage and in driving engagement with the gear drive, and a tie rod is disposed intermediate the rigid links and the sash lock. A trip lever with a trigger extending beyond the window frame is pivotally secured to the base and engageable with the lock linkage for restricting the movement of said lock linkage during a non-locking mode of operation of the operator.