Abstract: A window constructed such that a window sash is slidable upwardly and downwardly along a side jamb of a window, and may be inclined relative to the side jamb. The window sash is hung by a counterbalance and held at a selected desired position. The counterbalance is provided with a coiled torsion spring which counter balances the window sash, and the torsion force of the torsion spring can be adjusted. Adjusting mechanism is provided with a rotatable adjusting shaft for adjusting the torsion force of the torsion spring, a braking member for applying braking force to the adjusting shaft to prevent the rotation of the adjusting shaft, and a cam face for urging the braking member against the adjusting shaft to brake it or release it.

Abstract: A device for fine adjustment of sashes in a double-hung sash assembly of the type comprising four movable sashes linked two by two by a set of two cables located on each side of the window frame and supported by four pulleys. At least two pulleys, and preferably four, are operatively attached to a support slidably mounted in a vertical rail provided in a housing. Each support is moved by means of a screw for adjusting relative positions of sashes, each screw comprising an upper end abutting on or operatively attached to one of the supports, an intermediary portion meshed to an element integral with the housing and a lower end downwardly projecting from the housing and preferably operable with a screwdriver. It allows fine adjustment of the relative position of a pair of sashes linked together to thus allow them to close simultaneously.

Abstract: A multiple spring counterbalance includes a torsion spring and a tension spring for exerting a combined lifting force on a window sash. A spiral rod is threadably engaged with a follower nut for converting a torque applied by the torsion spring into a lifting force on the window sash. The spiral rod has a pitch that is varied along one part of its length to produce a substantially constant combined lifting force throughout most of a range of sash travel between a lowered position and an intermediate position. However, the pitch is further varied along another part of the length of the spiral member to produce a larger combined lifting force within a remaining portion of the range of sash travel from the intermediate position to the raised position.

Abstract: For a laboratory fume hood where two sashes are provided and the total open area through the sashes must be regulated, a counterweight system having a dedicated counterweight for each sash and having the respective counterweights connected together by a cross cable draped over pulleys arranged above each respective counterweight. The cross cable has a preselected length to have a selected length of slackness which is equivalent to the total aggregate regulated travel of either or both sashes. Thus, one sash can be opened 100% or two sashes can be opened 50%.

Abstract: A sash window balance assembly of the present invention is fitted in a window frame for guiding movement of a sash window. The assembly includes a coil spring secured to a flexible shoe having an opening through the shoe and a cam rotatably fitted in the opening. The opening has different interior diameter span regions including a small span region bordered by a larger span region. The cam has different exterior diameter span regions including a small span region bordered by a larger span region. The shoe has an open side for flexing of the shoe between a release position when the small span regions of the shoe and the cam align with one another and a brake position when the small span regions of the shoe and the cam are out of alignment with one another. The shoe further includes exterior brake pads operable in the brake position with the brake pads being tapered inwardly along and towards the open side of the shoe.

Abstract: This invention, which provides a solution to the long-standing problem of motion-related rattle in torsion balances for windows, is based upon the discovery that the major source of the rattle is related to the movement of the free end of the twisted rod that is mounted within the coil of the torsion spring. A sound-deadening element of resin material is secured to the free end of the twisted rod, being positioned proximate to the extremity of the free end, and the preferred element has a maximum dimension (measured radial to the spring) that is greater than the maximum cross-sectional dimension of the twisted rod but less than the effective internal diameter of the coiled spring. The sound-deadening element eliminates the rattle by preventing contact between the free end of the rod and the spring, and it also acts as a glide to facilitate relative movement between the rod and the spring during operation of the balance.

Abstract: A sash platform for an automatic friction shoe connects to the shoe by means of a curved arm that fits into a correspondingly curved recess molded into the shoe body. An abutment limits the insertion of the curved arm into the shoe and holds a sash support blade at an operating level, and a curved holder surface supports the platform against the downward force of a sash. The shoe connects to a spring or counterbalance element and runs frictionally in a jamb liner channel.

Abstract: A sash balance apparatus for vertically slidable window installations, in which a friction shoe is disposed in a channel formed by a jamb liner extending along each side of the slidable sash and a connecting member extends between the sash and the friction shoe in a manner such that the weight of the sash when applied to the shoe tends to pivot the latter at least slightly within the jamb liner channel and thereby bring predetermined surfaces of the shoe into frictional contact with corresponding surfaces of the jamb liner channel, preferably including elongated rib-like intermediate walls which extend into the channel from its sides. The channel thus provides a plurality of different longitudinally-extending friction surfaces which may be selectably engaged by the friction shoe as a function of its particular configuration, dimensions, and the degree of tilt introduced by the applied weight of the sash.

Abstract: An improved coil spring counterbalance assembly embodying a coil spring support structure that provides a cooperatively radiused restraining shoe against which the uninterrupted smooth external circumferential surface of the coil spring ribbon rotationally operates in extension and retraction thereof during counterbalanced sash movement, thereby eliminating both the clicking sound and spring rotational cyclic vibrational shocks otherwise caused by the spring interior ribbon core tail ending riding over the top of a spring core support hub, in addition to a multiple coil spring connection method for improved successive affixment of extended coil spring ribbons one to the other and in turn to the sash attached balance shoe connector therefor when more than on coil spring is required in order to effect proper sash counterbalancing.

Abstract: A spring balance for counteracting the weight of heavy window sashes includes both a torsion spring and a tension spring. The two springs are separated by a rigid tube. One end of each spring is connected to an end of the rigid tube. A spiral member engages a follower carried by the other end of the torsion spring and includes a stop along its length for engaging an anchor carried by the other end of the tension spring. The spiral member can be attached by conventional means to a shoe or other connection to the window sash.

Abstract: An improved vertically slidable pivotal window unit having a spring loaded jamb latch assembly which provides a mechanically positive latching and release mechanism in going from the vertically displaceable to horizontally pivotal sash opening and closing modes.

Abstract: A sash balance apparatus for vertically slidable window installations, in which a friction shoe is disposed in a channel formed by a jamb liner extending along each side of the slidable sash and a connecting member extends between the sash and the friction shoe in a manner such that the weight of the sash when applied to the shoe tends to pivot the latter at least slightly within the jamb liner channel and thereby bring predetermined surfaces of the shoe into frictional contact with corresponding surfaces of the jamb liner channel, preferably including elongated rib-like intermediate walls which extend into the channel from its sides. The channel thus provides a plurality of different longitudinally-extending friction surfaces which may be selectably engaged by the friction shoe as a function of its particular configuration, dimensions, and the degree of tilt introduced by the applied weight of the sash.

Abstract: A biological safety cabinet vertical lift assist system employing one or more pneumatic springs operatively connected to the cabinet and sliding window to counterbalance the window's weight to provide a substantially constant brake force spring resulting in smoother and easier operation of the window.

Abstract: A sash balance apparatus for vertically slidable window installations, in which a friction shoe is disposed in a channel formed by a jamb liner extending along each side of the slidable sash and a connecting member extends between the sash and the friction shoe in a manner such that the weight of the sash when applied to the shoe tends to pivot the latter at least slightly within the jamb liner channel and thereby bring predetermined surfaces of the shoe into frictional contact with corresponding surfaces of the jamb liner channel, preferably including elongated rib-like intermediate walls which extend into the channel from its sides. The channel thus provides a plurality of different longitudinally-extending friction surfaces which may be selectably engaged by the friction shoe as a function of its particular configuration, dimensions, and the degree of tilt introduced by the applied weight of the sash.

Abstract: A jamb liner, or facing member, for movably mounting windows along their side edges in channels or runs, in which a concealed elongated chamber is provided for a coil spring or the like used as part of the balance or positioner mechanism by which the window is supported in different positions along the length of the jamb as it is opened and closed during use. Preferably, such concealed chamber includes an elongated wall which projects outwardly from the jamb liner and has an arcuate or other angularly-configured cross-section, such that it presents a generally closed appearance when viewed from a position near the window. Such chamber-concealing wall defines an elongated opening through which the balance device may communicate for access by the window sash, for supporting the latter and positioning it.

Abstract: A top clip (20) automatically anchors a window spring (15) at the upper end of a jamb liner spring cover (11) having a generally D-shaped cross section. The top clip has a body (21) that interlocks with the upper coils of spring (15) and has a rounded nose (26) that helps guide the body inside the upper end of spring cover (11). The top of body (21) has a flange (22) that overlaps the upper end of the spring cover, and the periphery of the flange has retainer tangs (25) that extend downward to overlap the outer surface of the spring cover. If a spring is accidentally snapped during assembly, top clip (20) and spring (15) are free to move above the upper end of spring cover (11) and can be returned to an anchored position, simply by pulling downward on the spring and the top clip.

Abstract: This is a window assembly with one sliding window, one fixed window and a rectangular framework made up of extruded framework members with the same cross-sectional profile except for small segments that are removed in the framework members along which the sliding windows slide. Three of these framework members support the fixed window pane along three edges. The sliding window has extruded peripheral members along its edges which have the same cross-sectional profile as one another except where small segments are removed in two of them to slidably interfit with the two framework members along which the sliding window slides. An additional peripheral member of this cross-section is part of the framework and supports the fixed window along its remaining edge. Springs inside the two framework members along which the sliding windows slide urge the sliding window to an open position.

Abstract: A self-contained heavy duty constant force sliding sash counterbalance assembly embodying a stacked plurality of coil springs each having a uniform coiling and recoiling force throughout all of the various coils irrespective of the individual coil spring positions of extension or contraction, wherein the counterbalance assembly structure is provided with an elongated U-shaped housing adapted to adjustably accommodate the addition or removal of individual spring elements as necessary in order to achieve the proper counterbalance effect for the weight of the particular sash to be supported so that over the raising and lowering range of that sash to which the counterbalance assembly is affixed, and at all adjustably set sash opening elevations and corresponding coil spring positions of extension and contraction therebetween, there is a substantially constantly uniform counterbalance force effect exerted on the sash.

Abstract: A spring loaded safety member is pivotally mounted against a coil spring seated within the channel of a standard pulley and spring system which has been moved slightly in the channel. The safety member comprises sharp teeth and is normally retracted in the channel with a curved portion around a pin extending laterally therethrough. Upon failure of the cord or spring of the standard window system the safety member suddently pivots outwardly under spring pressure to engage the inner wall of the window frame.

Abstract: A compound counterbalance system for window sashes and the like, comprising: a biasing spring for easing operation of a window sash and the like, the biasing spring being movable at an inherently variable rate of force; a first biasing force transmission having a fixed rate of movement transmission part connected to the biasing spring and a variable rate of movement transmission part connected to the window sash and the like, the variable rate of movement transmission part having a variable rate of operation predetermined to automatically compensate for the variability of the biasing spring to provide substantial constancy of the biasing force throughout an operating range; and, a cable for interconnecting the biasing spring, the first biasing force transmission, and the window sash and the like, whereby loading forces on the first biasing force transmission are substantially constant throughout the operating range.

Abstract: A system of anchoring a window balance spring (16) in a channel (20) includes an arched anchor plate (10) connectable to spring (16) and having edge projections (15) that fit between the side walls (21) of the channel. When these and the bottom (22) of the channel are supported by a tool (30), anchor plate (10) is stamped flat against the channel bottom to spread edge projections (15) apart and drive them into the channel side walls (21) for a deformation interlock that holds the anchor and the spring reliably in place within the channel.

Abstract: A double-hung window having a casing with side boards inwardly delimiting sash pockets is replaced by first stripping the casing of the sashes, then filling the sash pockets with fluent particulate insulation, and finally fitting a replacement window into the casing. These holes can be the ones left by removal of the sash-cord pulleys, or can be specially made. The insulation is cellulose and is filled into the pockets by being pumped thereinto. Furthermore on stripping of the sashes same are separated from the respective sash weights which are left in the respective sash pockets.

Abstract: An extruded resin jamb liner (10) has a spring cover (12) with a longitudinal slit (15) in which a platform (20) moves for balancing a sash. Platform (20) is a single piece resin part having a spring connector (30) inside the spring cover, a neck (24) extending through the slit, and a sash support (25) outside the spring cover. The platform also has inside and outside friction surfaces (26 and 27) respectively engaging inward and outward facing surfaces of the spring cover on opposite sides of the slit to provide a load-related frictional resistance against vertical movement of the platform in the slit.

Abstract: A brake mechanism utilizes the tension of a spring acting upwardly and the weight of a window acting downwardly to produce a force couple for applying a frictional force to hold a window sash in a preselected position in a sash run. The mechanism is utilized in combination with a jamb liner defining an elongated sash run provided with a C-shaped guide channel in its plow region. The channel has co-planar, laterally spaced, flanges defining a longitudinally extending slot therebetween. A brake component has a pair of shoe portions disposed in the channel adjacent respective internal flange surfaces. The brake component rotates in the channel to move the shoe portions into frictional engagement with the internal flange surfaces. A columnar element rigid with the brake component extends through the slot and presents means disposed outside the channel for applying a torque to rotate the brake component inside the channel.

Abstract: This invention relates to a window sash balance of the coil spring and cord type in which a friction drag element is in frictional contact with multiple lengths of loops of said cord.

Abstract: A wood-clad metal window frame is formed from four extruded aluminum sections to each of which is secured at its interior side edge a wood facing member. Each of the extrusions has formed thereon various lips and flanges which collectively define in the assembled frame an integral J-channel, an integral nailing and flashing flange, and a pair of integral jamb channels each adapted to receive and retain a conventional sash-supporting balance member. Carried within the frame, and concealing an interior portion of the head section of the frame is a sight baffle which has integrally formed therewith a weather stripping element positioned to sealingly engage a window sash installed in the frame. The wood facing members collectively define in the assembled frame an interior wood border which provides the frame with an all-wood interior appearance and further functions as a thermal damper to inhibit outward and inward heat flow through the frame.

Abstract: A shallow two inch deep double hung window which is sufficiently water and wind resistant to replace jalousies, which can be used in cabana walls and which fits screen porches, utilizing existing screening. Block and tackle sash balance counter balance the weight of individual panels and provide a lateral resilient action to maintain panels in position. A double action leaf spring stop for each panel selectively disengages the sash balances therefrom so that by moving a panel laterally it is removable. Window and panel frame members consist of aluminum extrusions which facilitate construction of custom windows made to selected sizes. Inside or outside flanges for securing the window to the wall structure are optionally provided.

Abstract: A packaged replacement window includes a rectangular carton and two wood window sash, one overlying the other, within the carton. In addition, the packaged window includes two jamb weatherstrip and balance assemblies which are folded intermediate their ends and lie along the side walls of the carton outwardly from the side edges of the sash. The jamb weatherstrip and balance assemblies when removed from the carton will open to a straight condition, and in that condition the jamb weatherstrip and balance assemblies may be installed along the sides of a window opening where the sash may be engaged with them. A lid fits over the carton to completely enclose the sash and the jamb weatherstrip and balance assemblies that are within the carton. All the components necessary to install the replacement window are contained within the package which is easily stored, transported, and otherwise handled.

Abstract: The specification discloses an improved jamb liner and novel friction shoe balance arrangement for a cottage-style window enabling the friction shoe balance, or positioner, concept to be utilized with window sash having a plow of nonrectangular cross section, and in "non take-out" type double hung or vertical slidable windows. The jamb liner includes a body securable to the jamb and a channel in which the friction shoe rides extending into the sash plow. The channel comprises a pair of sidewalls projecting outwardly from the jamb liner body into the plow, each sidewall including end portions shaped to generally conform to the nonrectangular portion of the plow, and disposed along and adjacent the latter. A pair of shoe abutment walls extend inwardly toward one another from the opposite channel sidewalls, and provide generally coplanar surfaces against which the friction shoe bears.

Abstract: A device for indicating the failure of one of the cables in a redundant cable system for assisting the movement of a closure which includes means for so connecting each of the cables to a counterweight suspended therefrom that the counterweight is maintained at a first distance from the closure when both cables are intact and the counterweight so moves to a second distance from the closure when one of the two cables fails that the counterweight can move into a position for inhibiting the raising of the closure, thereby indicating the failure of one of the cables. The second distance is greater than the first distance. The connecting means is a pivoting member having two arms, each being adapted for sliding attachment to one of the cables.

Abstract: A shallow two inch deep double hung window which is sufficiently water and wind resistant to replace jalousies, which can be used in cabana walls and which fits screen porches, utilizing existing screening. Block and tackle sash balance counter balance the weight of individual panels and provide a lateral resilient action to maintain panels in position. A double action leaf spring stop for each panel selectively disengages the sash balances therefrom so that by moving a panel laterally it is removable. Window and panel frame members consist of aluminum extrusions which facilitate construction of custom windows made to selected sizes. Inside or outside flanges for securing the window to the wall structure are optionally provided.

Abstract: A perimeter guard for a machine wherein a plurality of vertical posts are spaced about a machine. Each post is H-shaped and has lateral flanges projecting from it to create vertical channels on each side of the post. A transparent window is slidably mounted in one set of perimeter channels to form an upper guard and a lower pannel is slidably mounted in the other set of opposed channels.A counterbalance is provided for the windows and a detent is provided for locking the lower panels in their lowermost position or in a raised position.

Abstract: A pivot shoe 10 has a bite spring 30 operated by a cam 40 for interlocking pivot shoe 10 with a jamb channel 15 to resist upward movement under the bias of a sash balance system when a sash 20 connected to a pivot shoe 10 by a pivot bar 22 is pivoted away from vertical. Pivot shoe 10 has a resin body 11 shaped to guide on the sides 16 of jamb channel 15 and cam 40 is pivotally housed within body 11 and slotted to receive pivot bar 22 so that cam 40 pivots with sash 20. The jamb end of cam 40 is profiled and bite spring 30 has a follower 32 engaging the cam profile 47. Bite spring 30 is mounted on the jamb side of pivot shoe 10 and upwardly inclined toward the jamb channel bottom 17. When sash 20 pivots from vertical, cam 40 tilts bite spring 30 outward so that its upper edge bites into channel bottom 17 and locks pivot shoe 10 against upward movement.

Abstract: A pair of oppositely wound torsion springs and a pair of oppositely wound spiral ribbon actuators therefor are provided in a unitary construction as a window sash balance. There are torques developed between each of the spiral ribbon actuators and its respective spring. The two torques are in opposite directions and cancel each other. This eliminates torque which would otherwise, when applied to the window sash, increase the friction between the sash and the window jam and make difficult the operation of tilt type and removable sashes.

Abstract: A safety gate assembly includes a pair of gates guarding a pre-selected area, the gates being coupled together with cables and pulleys so that one of the gates is always closed to prevent someone from accidentally walking through the area and being injured. The gates are balanced to make movement thereof easy and self-biased to stably open and closed positions.

Abstract: A sash coupling is adapted to be connected to one side of a sash which slides vertically in parallel channel sash guides mounted within a sliding sash window frame. Secured to the top of the sash coupling is the lower end of a flexible sash cable, the outer end of which extends upward to and around a stationary outer pulley pivotally mounted on a transverse pulley support at the top of the sash guide, whence an intermediate section of the cable extends downward to and around a vertically-movable traveling pulley mounted on a balancing-spring coupling to which the upper end of the elongated sash-balancing tension spring is hooked, whence an inner section of the cable extends upward to an anchorage on the upper end of the sash guide. The lower end of the elongated sash-balancing spring is hooked over the lower end of the sash guide. For a double-hung sliding sash installation, the upper sash is balanced in a similar manner.

Abstract: A vertical baler includes a housing defining a compacting chamber which receives a vertically moveable and power operated horizontal platen. The chamber has a front opening, and the lower portion of the chamber is closed by a pivotal door member which is secured to the cabinet by a latch mechanism including two separate pivotal members releasably connected by an over-center lock element. The upper part of the opening is closed by a vertical safety gate member which retracts upwardly and is partially counterbalanced by a torsion coil spring having one end portion secured to the housing. The other end portion of the coil spring is connected to a shaft supporting a pair of winch members around which are wrapped corresponding cables connected to the lower portion of the gate member.

Abstract: A baling machine is disclosed having a single ram means horizontally spaced from the baling chamber to reduce the overall height of the baling machine, while avoiding the complications of two side-mounted ram means. The baling machine includes a vertically movable platen which is supported on a sleeve which is mounted around and supported on a vertically extending support column horizontally spaced from the baling chamber. The ram means is preferably located between the support column and the baling chamber in a position which extends substantially below the top of the baling chamber.

Abstract: The object of this invention is to provide a sash balance foot seal mechanism for sealing the space between each side of a window sash and the adjacent window jamb or jamb liner.Each sash balance foot seal mechanism has a foot seal comprising a flat resilient member into which the ends of a metal catch member are embedded. The catch member secures the foot seal to the sash balance mechanism. Each foot seal has a depending projection for sealing a complementary slot in each side of the sash. Each foot seal further has a low friction seal coating at least on the surface slidably engaging the jamb or jamb liner.

Abstract: One-piece member with a cam-shaped periphery serves as both a slide and a tilt-lock for a window sash which is slidable vertically in a window frame and is tiltable with respect to the window frame. A thin, flat, elongated spring leaf has its lower end attached to the combined slide and tilt-lock member and has a spirally wound upper end fastened to the window frame. The window frame conceals and protects the unwound length of this spring.

Abstract: A rattle free window having a sash balance that is provided with a sash hook that is connected to a slide by slot and pin means so arranged that the weight of the sash thereon cam; the slide laterally against the window jamb. The sash balance may also include a novel clip which both fixes one end of the balance spring to its housing and also attaches the housing to the window jamb. The window may also include a ramp clip which automatically catches the slide when the sash is raised so that further raising of the sash can lift the sash off of the novel sash hook and slide structure.

Abstract: This invention relates to an improved weather strip and balance assembly for nonremovable windows in which the weather strip is made of a compressable, high impact material with ridges thereon to mount the sash. The ridges also mount and enclose the balance springs and pulley blocks with the sash cord coupled thereto for counter-balancing the weight of the sash. The sash cord is directed out from behind the weather strip through an opening therein to connect to the sash through an anchor. The length of the sash cord at the connection of the sash is adjustable to adjust the tension of the balance system applied to the sash. The assembly is readily assembled in said jambs of a window frame by securing the same thereto, such as by screws. The assembly is manufactured, shipped and stored without tension thereon to eliminate warpage and displacement of parts.

Abstract: The power supply includes a transformer situated in an enclosure having a movable cover. The transformer is immersed in oil and the electronic components associated therewith are affixed to a support connected to and movable with the cover. To eliminate the necessity for an independent external cover lifting mechanism, normally required to move the cover to permit access to the interior of the enclosure because of the weight thereof, a counterbalancing mechanism, situated wholly within the enclosure, is provided to facilitate servicing of the electronic components. The mechanism includes a pair of planar counterbalancing members, each of which is mounted for movement along a different interior wall of the enclosure. Each member is connected by cables to the cover, the cables cooperating with sheaves, rotatively mounted to the enclosure wall. The counterbalancing mechanism requires no additional space within the enclosure and is comprised of simple, inexpensive and reliably operating parts.

Abstract: A rattle free window having a sash balance that is provided with a sash hook that is connected to a slide by slot and pin means so arranged that the weight of the sash thereon cams the slide laterally against the window jamb. The sash balance may also include a novel clip which both fixes one end of the balance spring to its housing and also attaches the housing to the window jamb. The window may also include a ramp clip which automatically catches the slide when the sash is raised so that further raising of the sash can lift the sash off of the novel sash hook and slide structure.

Abstract: A counterbalance for a window sash which comprises a bracket for securement to the window frame and which bracket contains spaced-apart slide plates with at least a pair of vertically spaced-apart transverse elements extending therebetween; there being a self-coiling spring suspended from each transverse member by means of the free end of such coil being lead over said transverse member. The free ends of said coil springs are connected to each other and then secured to a movable window sash for effectively counterbalancing same during movement between open and closed condition. Said transverse elements permit of at least two-point contact with said spring free ends whereby rocking of the spring coils is inhibited during sash counterbalancing operation.

Abstract: A counterbalance for a fume hood is located behind the back of the hood and is connected to each side of the sash by a pair of cable portions which are routed from the counterblanace over the top of the hood by pulleys on the top of the hood. The counterbalance comprises a container which can be filled with a desired amount of weight material, and a roller on the container is engageable with the back of the hood to prevent sliding contact between the counterbalance and the hood. The weight of the sash can be adjusted to equal the weight of the counterbalance by inserting weights into a weight-receiving receptacle formed in the frame member attached to the upper edge of the sash glass.