US2795415A - Combination mounting and operating mechanism for casement window - Google Patents

Description

June 1957 D. v. CLARK 2,7 5, 5

COMBINATION MOUNTING AND OPERATING MECHANISM FOR CASEMENT WINDOW Filed April 18, 1956 INVENIOR D.V. CL A RK ATTORNEY r 2,795,415 Patented June 11, 1957 COMBINATION MOUNTING AND OPERATING MECHANISM FOR CASEMENT WINDOW David V. Clark, Jacksonville, Fla.

Application April 18, 1956, Serial No. 578,971

1 Claim. (Cl. 268-119) This invention relates to structures of various kinds including buildings for human habitation, and which have openings or windows set back in the wall from the surface and generally referred to as casement windows, the closures or window sashes of which are mounted so that they have more or less limited movement.

The invention relates particularly to the manner of supporting the metal sashes of casement windows and to mechanism by which said sashes may be opened and closed or otherwise operated from the interior of the building, and to thehardware employed, the nature of which determines the manner in which the sashes can swing from fully closed position to fully opened non-light- ,obstructing position.

Hinges and operating means for casement windows have not been fully satisfactory for various reasons, including the fact that they were frail, did not fit, would jam and stick, were not susceptible of ready adjustment,

lackeddurability, did not permit the window to be disposed both in fully closed position and fully open positionflat against the wall of the building, and otherwise failed efiiciently to perform the function for which they are intended.

It is an object of the invention to provide a simple, compact, relatively strong, liquid-tight, combination pivotal support and operating mechanism for a metal casement window sash, including a housing the lower portion of which is rigid and containing a crankshaftbearing and worm and gear operating mechanism devoid of appreciable lost motion or free relative movement.

Another object of the invention is to provide a combination pivotal support and sash opening and closing mechanism which can be readily secured in place by bolts so. that :the window sash is mounted to swing freely from a fully closed position outwardly to a fully open position,

substantially parallel to the adjacent wall and by which the operation of opening and closing the window can be accomplished with a minimum of effort.

A further object of the invention is to provide a combination pivotal support and window sash operating mechanism including a housing carrying a hinge for a window sash and in which housing is mounted a crankshaft with a worm thereon and a segmental gear driven thereby and connected to said hinge for operating the same, the segmental gear permitting the parts to be assembled in close contact so that lost motion in operation is substantially eliminated.

Other objects and advantages of the invention will be apparent from the following description taken in conjunction with the accompanying drawing wherein:

Fig. l is a top plan view illustrating one application of the invention applied to a metal casement window the window frame being illustrated in section;

Fig. 2, a side elevation of the invention with parts of the building in section;

Fig. 3, a horizontal section on the line 3-3 of Fig. 2;

Fig. 4, a vertical section on the line 4-4 of Fig. 2; and

Fig. 5, a fragmentary vertical detail section.

Briefly stated, the present invention is a window mount and casement window sash oscillating mechanism in the form of an elongated body having an L-shaped bracket at one end and a chamber or gear box in which is located at its opposite end a hinge pivot to which is attached a casement window sash, two or more of the devices being employed in spaced relation for supporting said sash. The hinge pivot is mounted in a bearing in an upstanding boss or shaft housing of a cover plate for a gear box on the under side of which cover plate is mounted a worm gear fixed to the hinge pivot. The lower end of this pivot is journalled in a bearing frictionally held in the bottom of the gear box which is adapted to be filled with a lubricant. An anti-backlash worm gear, preferably segmental to facilitate assembly in contact with a worm in the gear box is fixed on a shaft located in a bore or receiving opening in the body at each side of the gear box and with friction sleeve bearings for the same, adapted to be supplied with lubricant from the gear box, removal of such shaft being made possible by a screw plug in an opening through which the worm and supporting shaft can be removed.

Due to the distance between the hinge pivot and the mounting bracket the easement window shaft is mounted in a position to permit it to swing from a fully closed position outwardly to a fully opened position parallel to the surface of the building. The end of the shaft on which the worm is mounted projects from the body a sufficient distance to be located within the interior of the building and is adapted to have a crank thereon for rotation of the shaft and consequent swinging of the window sash to open and close the same. In order to retain the screw plug a set screw may be provided preferably beneath the cover for the gear box. In order to ensure that the cover of the gear box is fixed in place and liquid tight the cooperating surfaces between the gear box and surfiaces are inclined so that one fits over the other, the marginal edges of the cover fitting over the inwardly inclined walls of the gear box housing. In order to ensure the fixed relation of the cover on the gear box housing, the body covering the housing is provided with a transverse channel or groove beside the inclined marginal rim of the gear box and the cover is provided with a corresponding tongue so that when the parts are assembled there can be no relative movement between them.

With continued reference to the drawing, the window mount and oscillating mechanism of the present invention comprises an elongated body 10 having an L-shaped mounting bracket 11 at one end and a chamber 12 in its opposite end portion. The housing or wall of the chamber 12 is provided with an inclined surface 13 for engagement with a complimentary bevel surface T4 of a cover 15. The body 10 is provided with a groove 16 adjacent one side of the chamber and the cover is provided with a thickened tongue 17 so that the parts may be firmly held together in fixed relation by means of screws 18. The cover 15 is provided with an upright boss which provides a shaft housing 19 for the reception of a shaft 20 mounted in bearing sleeve 21, such shaft having its lower end in a bearing 22 in a recess 22 in the body 10. The boss 19 is provided at its upper end with a taper 23 for cooperation with the corresponding taper 24 on a hinge 25 fixed to the shaft 20 by means of a set screw 26, the tapered surfaces 23 and 24 exclude rain and may have a fibre washer 27 therebetween for absorbing wear. On the lower portion of the shaft 20 within the chamber 12 which forms a gear box is mounted a segmental worm gear 28 fixed to the shaft in any desired manner as, for example, by means of a set screw 29. The segmental worm gear 28 has teeth engaging an anti-backlash worm 30 on a shaft 31 in a manner to drive said worm gear by said worm. The shaft 31 is mounted in bearing sleeves 32, 33 and 34 in a longitudinal bore 35 and an aligned threaded bore 36 in which a screw plug 37 is held in place by a set screw 38'. Against the bearing 32 and the plug 37 is a collar 39 for limiting movement of the shaft 31) in one direction, a similar collar 40 being provided for limiting movement of the shaft in the opposite direction.

The shaft 31 is adapted to be connected by a coupling 41 with a crank 42, the shank of which is rotatably retained within a bracket 43 secured in place by means of screws or other fasteners 44. The hinge 25 has an L- shaped extension 46 with vertical and horizontal arms for engagement with the easement window sash, the upright arm having a reduced upper extremity 47 and a reduced lower extremity 47 to enable it to fit within a slot in the sash 45, the upright and horizontal portions being adapted to be attached by suitable fasteners to the upright and horizontal portions of the sash in any suitable manner as by screws 48 and nuts 49. The horizontal arm is provided with a flange 56 having apertures 51 through which pass means for fastening flange 50 to base of sash 45. The vertical arm of the mounting bracket ll has a recess 52 forming a shoulder on the end opposite the chamber 13. Said recessed portion passes through a slot in the window frame 53 and is attached thereto by screws 54 and nuts 55 or other suitable means. The horizontal arm passes through a slot in the base of the window frame 53 and is secured by screw 56 and nut 57.

Thus, by rotation of the crank 42 rotary movement will be imparted to the shaft 31, the worm 30, segmental worm gear 28, shaft and hinge 25, with the casement window sash 45. On account of the upstanding boss or thickened shaft housing 19, the shaft 20 will be firmly and securely held so that the sash of the easement window may be easily moved by operation of the crank 42. The joint between the hinge and the shaft bearing housing 19 due to their inclination serve to exclude rain from the joint. ln like manner, the cover 15 for the chamber which forms the gear box due to the inclined surface fits tightly over such gear box and excludes water therefrom and likewise prevents the escape of lubricant. On account of the worm gear 28 being segmental, its removal from engagement with the worm can be readily accomplished and the parts made to fit closely together with minimum clearance and thereby eliminate lost motion.

It will be apparent that the window sash can be swung from the closed position to a position substantially 180 therefrom so that in the open position the sash will be closely adjacent the exterior surface of the wall thereby avoiding interference with the passage of persons including adults and children who may walk past the open window on the exterior side. The window may be used inside of buildings and where such window opens onto a porch, patio, corridor or hallway, the marked advantages of having the window open to the position substantially parallel with the wall will be apparent, by pre- 4 venting the possibility of persons or things contacting the open window.

It will be readily apparent, therefore, that the present invention is simple, strong, durable, self-lubricating and provides a rigid but oscillatable support for a casement window sash and which can be opened or closed from the interior of the building.

What is claimed is:

A casement window operating mechanism comprising a horizontally disposed elongated body, means to secure one end of the body to the frame of a casement window adjacent the lower pivoted edge of the window, said body having an upwardly opening lubricant retaining chamber completely closed at the bottom, said body hav ing a horizontally disposed longitudinal bore opening into said lubricant receiving chamber and opening through the outer and inner ends of said body, fixed bushings in the inner portion of said bore, the outer portion of said bore having threads and being of a size to permit the entry and removal of a worm and its shaft, a bushing threaded on its outer periphery mounted in said outer portion of said bore, a horizontal shaft rotatably mounted in said fixed and threaded bushings, a worm of a size to pass through said outer threaded bore mounted on said horizontal shaft, collars on said horizontal shaft to cooperate with the adjacent fixed bushing and the threaded bushing, a vertically disposed bushing mounted in the bottom of said casing and opening upwardly, a cover having a downwardly extending flange portion mounted on said body closing said lubricant receiving chamber, an upwardly extending boss on said cover and having a bushing therein, means to secure said cover on said body, a vertically disposed shaft mounted in the bushing in said body and the bushing in said boss, said shaft projecting above the upper end of said boss, a sash mounting bracket having a downwardly opening socket adapted to receive the projecting end of said vertical shaft, a segmental worm gear mounted on the lower end of said vertical shaft and having an untoothed portion of a size to clear said worm when the worm is in operative position whereby the worm can be mounted in position prior to the mounting of said segmental worm gear whereby said segmental worm gear can be positioned with the cutaway portion adjacent said worm to permit easy assembly, said collars on said worm shaft abutting the adjacent bushings whereby the end play of said worm shaft can be eliminated and the adjustment can be made to prevent lost motion and rattling of the window.

References Cited in the file of this patent UNITED STATES PATENTS 2,299,338 Meyer Oct. 20, 1942 2,304,960 Schane Dec. 15, 1942 2,373,197 Ostrander Apr. 10, 1945 2,536,920 Ducanis Jan. 2, 1951

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