Abstract: A patio door lock having a linkage for reciprocating movable bolts in the top and bottom of the door into and out of locked positions. A six bar linkage is provided to reciprocate bolt rods connected to the bolts by axially directed forces. A tension spring biases the bolt rods together, and stops are provided to limit an over-center motion of the linkage as assisted by the tension spring, one stop holding the linkage and bolt bars in the locked position.

Abstract: A conventional roto-gear window operator for a casement or awning window, or the like, is provided with an alarm switch. The alarm switch consists of a conductive wire which is connected to a remote alarm package and is insulated from the base of the operator. One end of the wire is fixedly held adjacent to the helix of the operator worm gear so as to provide intermittent wiping contact when the worm gear is rotated. The worm gear is electrically conductive and, through the operator base, is connected to a lead wire which also extends to the alarm package. Accordingly, rotation of the worm gear (to actuate the operator) opens and closes the switch by engagement and disengagement of the wire with the worm gear helix, generating a sequence of pulses which triggers the alarm package.

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: 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: A security lock for movable closure and, more particularly, for horizontal slider windows in which a case for the lock has a top wall and side walls defining a generally hollow interior opening to the bottom of the case, a bolt is movably mounted in a channel formed within the case with the channel opening toward the bottom of the case. The bolt is movable between extended and retracted positions. Structure for positioning of the bolt includes a driver associated with a manually-rotatable shaft and a connection between the driven and the bolt which functions to retain the bolt from falling out of the guide channel through the open bottom of the case during handling and shipping and to also transmit movement of the shaft to the bolt.

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: A portable observation stand having a ladder formed of upper and lower ladder sections pivotally interconnected at adjacent ends for movement between a folded position and an extended position in end-to-end relation, a seat and a foot-support member are both pivotally connected to the upper ladder section with the seat arranged to be in operative position above and rearwardly of the foot-support member. The seat is disposed rearwardly of the rails of the upper ladder section and the foot-support member has a pivotable part thereof movable to an overlapped position with the remainder thereof whereby a person can climb the ladder to the seat level without obstruction thereby. Linkage structure interconnects the seat and foot-support member for simultaneous movement thereof between an operative position extending at a substantial angle to the upper ladder section and a storage position substantially parallel with the upper ladder section to facilitate folding of the stand.

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: A snap-on handle structure including a handle mountable on a splined operating shaft having a series of teeth, said handle having an internal recess to receive the shaft and having spaced, splined sections in said recess to interfit with the splined operating shaft, and a pair of members extending interiorly along the length of the recess and interfitted with the handle at locations between the splined sections, with each member having a pair of spaced-apart, inwardly-turned elongate flanges to fit between splined teeth on said operating shaft.

Abstract: A process of forming glass balls by treatment of particulate vitreous material and a second material comprising carbon material and a carbonated salt. The process is carried out at a temperature, for the particular particulate vitreous material, which corresponds to a viscosity of from about 10.sup.6 to about 10.sup.3.5 poises with mixing and agitation.The apparatus includes a furnace having a tube (4) adapted to rotate about an horizontal or inclined axis, delivery means (10, 12, 14) to the tube for the materials to be treated, and heating means (8, 20) for heating the tube and the bed of material from both an external and internal location.

Abstract: An adjustable roller mechanism for a sliding closure having a case attachable to the sliding closure and a roller-mounting bracket mountable thereon for adjustable movement to varying positions extending from the case. A smooth surfaced cam is rotatably mounted to control the adjusted position of the roller bracket and a modified planocentric gear assembly operable by manually rotating a mounting shaft provides a gear reduction drive for rotation of the cam and for automatically locking the cam in any rotative position.

Abstract: A snap-on handle structure for attachment to an operating shaft having detent notches and cam members including a handle with an internal recess, and a generally U-shaped spring member in the handle recess with a pair of spaced-apart arms with free ends extending toward an open end of the recess. Each of the arms has a generally V-shaped hook portion intermediate the central base of the spring member and the free ends of said legs with a pair of inclined legs to coact with the cam members on placement of the handle on the operating shaft and coaction with the detent notches for retention of the handle on the shaft.

Abstract: A closure operator for a pivotally mounted closure, such as a vehicle sun roof or a pivoted window, having a series of pivotally interconnected links including an opener link pivoted to the closure and to an idler link which is pivotally mounted to a base. A driver link is pivotally connected between the opener link and a handle rotatable on the base whereby handle movement is imparted to the driver link for moving the opener link and the closure and with the movement of the opener link being partly guided by the idler link.

Abstract: A portable observation stand for mounting on trees having a wide range of diameters. The stand includes a frame, which is detachably secured to a selected tree, and an articulated ladder which may be retained in a climbing position, for entry by an outdoorsman, and in a base position to provide support for a floor during use. A U-shaped rail may be mounted on the frame, and a shroud which encloses the stand may be secured to the rail.

Abstract: A window lock and, more particularly, a check rail lock which can be mounted in association with a double hung window having a center vertical muntin. The window lock has a casing housing a linearly movable locking unit with locking members having a locking notch at one end for engagement with catch means carried by the adjacent window sash, an operating unit with operating members movably mounted in the casing and movable between window unlocked and locked positions and with pin and slot structure interconnecting the locking members and the operating members with the casing whereby the locking members are guided in the linear movement thereof to an advanced position as the operating unit moves toward the locked position and the locking members are then raised into engagement with the catch means and withdrawn to tightly draw and lock the window sash together as the operating unit moves to the final locked position.

Abstract: A window lock having a base with a rotatable cam member engageable with a keeper for locking windows, such as a double hung window and a handle member rotatable in generally the same direction as the cam member for moving the cam member between retracted and extended lock positions with motion-transmitting means between the handle member and cam member providing for movement of the handle member through a greater arc of movement than the cam member. Structurally interengaging parts function when the cam member is in extended locked position to prevent any movement of the cam member from the locked position by a force applied thereto other than by rotation of the handle member. The window lock, by means of connecting link means to a second cam member, provides a dual window lock with operation of both cam members from a single handle member.

Abstract: A rotatable knob assembly having a knob easily mounted to the mounting section of an operating member, with the mounting section having two adjacent parts with a first part having a generally elliptical cross section and the other part having a generally circular cross section and with the knob having an open-ended cavity and an upstanding ridge on the inner surface of the cavity surrounding the wall which is of generally the same perimetrical length as the generally equal perimetrical lengths of the two parts of the mounting section. The knob is formed of a material which is capable of being distorted whereby placement of the knob on the mounting section by relative insertion of the mounting section into the cavity causes distortion of the locking ring to pass over the generally elliptical cross section part and the locking ring then returns to its normal shape to engage against the generally circular part of the mounting section and to lock behind the elliptical section.

Abstract: A lock for windows or other structures having relatively movable parts and having a lock casing and a keeper separable therefrom. A handle pivotally mounted on the casing carries a cam finger rotatable by planetary gear means including a stationary arcuate gear and a gear rotatable with the cam finger whereby, as the handle is pivoted to a locking position, the cam finger is given bodily movement to a position in alignment with the keeper and is also rotated between outward and inward positions to pick up the keeper and move it to a locked position within the casing.

Abstract: A window and lock structure therefor for drawing the window sash tightly against the window frame, with the locking structure including a keeper on the window sash engageable by a locking shoe mounted on the frame and with the locking shoe having compound movement to engage the keeper and draw the sash tightly closed, with the movement of the locking shoe being derived from mechanism actuated by engagement with another part of the window sash as the window sash is closed.