US2767008A - Cam fastener for panel closures - Google Patents

Description

Oct. 16, 1956 H, OS ALD 2,767,008

CAM FASTENER FOR PANEL CLOSURES Original Filed April 5, 1952 IN VEN TOR.

ATTORNEYS United States Patent 6 1 2,767,008 CAM FASTENER FOR PANEL CLOSURES Joseph H. Oswald, South Euclid, Ohio Original application April 1952, Serial No. 280,710,

now Patent No. 2,751,639, dated June 26, 1956. D1- vided and this application May 17, 1954, Serial No. 430,135

2 Claims. (Cl. 292-241) The invention relates to manually operable cam fasteners for panel closures such, for example, as window sashes and doors. The present application is a division of my copending application Serial No. 280,710, filed April 5, 1952, now Patent No. 2,751,639, issued June 26, 1956.

The object of the invention comprises the provision of a manually operable fastener that is easily operated to powerfully close and effectively lock a panel closure, that is effective to loosen a closure stuck in closed position, that has non-loosening attaching means, is easily attached, comprises a small number of parts and can be produced at low cost.

For the attainment of the foregoing objects the invention consists in certain forms, arrangements and combinations of parts which will be exemplified and explained by reference to the accompanying drawing of a preferred construction and thereafter defined in the appended claims.

In the drawings,

Fig. 1 is a fragmentary inside elevation showing my improved fastener applied to the frame and demountable storm sash parts of a window structure.

Fig. 2 is a vertical section on the line 2-2 of Fig. 1.

Fig. 3 is a horizontal section on the line 33 of Fig. 1.

Fig. 4 is an enlarged view of the sash member and two of the fastener members showing the frictional locking action between the two fastener members.

Referring in detail to the construction illustrated, the numeral 1 designates a portion of the jamb member of a window frame, the opening of which is to be closed by the panel member 2 such as an interior storm sash suitable for use in conjunction with an outwardly opening casement window, as shown in my above-mentioned application Serial No. 280,710.

The numeral 3 generally designates the improved fastening device which comprises a pivoted cam type bolt member generally designated by the reference numeral 4 which is operatively mounted on the sash and a keeper pin 5 mounted on the adjacent part of the jamb 1.

The bolt member 4 comprises a fiat cam part or head 4a and an operating handle 4b. The edge of the sash is recessed, as at 2a (Fig. 2), to recess the cam part 4a of the fastener and a bearing plate 6 which has a flange 6a to engage the inner face of the sash 2. The cam part 4a and the plate 6 are apertured to receive a pivot-andattachment screw 7, the plate 6 being formed, as shown in Figs. 3 and 4, to provide a frusto-conical bearing surface surrounding its aperture while the underside of the head of the screw 7 forms an opposing bearing surface. The pivot aperture of the cam part 4a is countersunk at each side of the part to fit the bearing surfaces of the plate 6 and the screw 7 (Fig. 3). The formation of the plate 6 is such that the edges of its aperture engage the screw at the junction of its shank and head parts to limit the tightening of the screw in the wood sash so that the bolt member 4 of the fastener is left free to turn on its bearing support while, at the same time, it is possible to thoroughly tighten the securing screw 7 and so prevent loosening of the screw in the use of the fastener. As will be apparent the flange 6a of the bearing plate 6 prevents rotation of the plate on the screw.

The cam part 4a of the fastener is formed with a ice curved cam slot that provides an inwardly facing cam surface 41: and an outwardly facing cam surface 4d, which are designed for alternative operative engagement with the keeper pin 5. At its inner end the cam surface 4d is slightly relieved (Fig. 2) for a purpose which will presently appear. The keeper pin 5 has plain cylindrical ends with an intermediate deeply knurled body section and when forced into a hole of suitable size the pin is firmly anchored in the frame structure.

On an inspection of Fig. 2 it will be apparent that when the fastener handle 4b is raised the cam surface 4d, acting against the projecting portion of the keeper pin 5, will serve to forcibly start the opening of the sash and this action is made doubly effective by the relief of the cam surface 4d at its inner end which causes the shoulder formed by the relief to suddenly strike the keeper pin and separate the sash from the frame in event they are stuck together with varnish or paint.

Thus the raising of the handle part 4b of the fastener from its locking position shown in Fig. 2 frees the sash or panel for opening movement. In the locking of the fastener 3 it will be seen that with the fastener handle raised the slot of the cam part 411 will receive the keeper pin 5 so that when the fastener handle is lowered cam surface 40 engages the pin to pull the sash to fully closed position with the keeper pin at or slightly below the recess of the pivot screw 7 so that the panel is effectively locked in the closed position.

The fastener is marked by simplicity and ease of manufacture and installation. The expedient of locking engagement between the bearing plate and the pivot screw insures tight and firm attachment of the fastener without danger of loosening and at the same time free operational movement of the fastener cam is insured.

While the construction shown is of preferred form, the various features of the invention may be embodied within other equivalent forms within the bounds of the appended claims.

What is claimed is:

1. A fastener for cooperation with frame and movable panel parts comprising a cam lever having a flat head pierced with a pivot hole countersunk at both ends and formed with an open-end cam slot eccentric to the pivot hole; a non-rotatable bearing plate pierced with a screw hole and having a raised surface surrounding such hole rotatably engaged by the surface of one of the countersinks of the lever head; a screw for penetrating the said holes of the lever and plate and securing them to one of the frame and panel parts, the screw, when it and the lever and bearing plate are operatively attached to such frame or panel part, having its head in tight frictional engagement with the edge of the plate bounding its screw hole and in movable bearing engagement with the surface of the other countersink of the lever; and a keeper for attachment to the other of the frame and panel parts formed to enter the slot of the lever and cooperate with its cam surfaces.

2. A fastener as claimed in claim 1 in which the eccentric slot of the cam lever is defined by outwardly and inwardly facing cam surfaces and in which the width of the said slot is but slightly greater than the thickness of the keeper except for a local relief of the outwardly facing cam surface in the inner end of the slot which forms an inactive zone of said surface.

References Cited in the file of this patent UNITED STATES PATENTS 309,601 Broughton Dec. 23, 1884 2,166,620 Bellah July 18, 1939 FOREIGN PATENTS 505,218 Great Britain May 8, 1939

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