Work holders – Plural holders to hold workpieces relative to each other – Workpieces normal to each other
Patent
1982-10-28
1985-07-09
Schmidt, Frederick R.
Work holders
Plural holders to hold workpieces relative to each other
Workpieces normal to each other
269109, 269130, B25B 120
Patent
active
045277842
DESCRIPTION:
BRIEF SUMMARY
Until now, the artisan or the amateur wishing to realize a wooden frame by means of four rectilinear elements bevel-cut and glued, so as to receive a mirror, or a painting, or to constitute a window or a door frame, or even some sort of panel, had to provide himself with numerous joiner's cramps, by means of which he fixed the frame alter coating the joining surfaces with the glue, on the plate of a table or of a bench. This operation required the use of numerous clamping instruments, was delicate to carry out, and often led to bad workmanship.
The purpose of the present invention is to facilitate the making of frames of rectilinear elements bevel-cut and glued, thanks to an apparatus which is not very bulky, easy to put in place, and reliable.
To this end, it proposes, according to the main claim appended hereto, an assembly apparatus for making frames or panels, characterized in that it comprises a set of angles, each capable of embracing a corner of the frame or of the panel and provided with guide means, a cable surrounding the angles, passing in the said guide means, and a tightener to which two end segments of the cable are attached and which is capable of being operated so as to tighten the central segment of the cable around the angles.
An embodiment of the apparatus according to the invention will be described below, by way of example referring to the appended drawing, of which:
FIG. 1 is a top plan view,
FIG. 2 is a partial elevation of this embodiment,
FIG. 3 is a sectional view of the tightener along the line III--III of FIG. 1, and
FIG. 4 a sectional view analogous to that of FIG. 3, representing a variant of execution of the clamp incorporated in the tightener.
The apparatus depicted in the drawing can be used for making frames of very variable dimensions, the minimum dimension being on the order of 10.times.10 cm. and the largest dimension being able to attain up to 1.times.2 m. or even more, according to the length of the cable used.
The apparatus comprises, on the one hand, four angles designated by 1, on the other hand, a tightener designated by 2, and finally a flexible metal cable 3. The angles will preferably be of a light alloy and obtained by molding. They are formed of a rectilinear body of a length of about 15 cm., composed of two walls 1a and 1b oriented at right angles to one another. The angles further comprise an upper wall 1c and, at mid-height, a middle wall 1d parallel to the upper wall 1c. As is seen in FIG. 1, the upper walls 1c do not cover the whole surface of the angle but leave the inside corner uncovered by contriving an opening 32 of triangular shape which permits veriyfying the positioning of the fillets which form the sides of the frame when these have been put in place, as will be seen further on. Each angle comprises a second opening 33 which is contrived between the middle wall 1d and the foot of the angle and which likewise extends into the corner of the angle, i.e., partly in the wall 1a and partly in the wall 1b. At mid-height between the walls 1d and 1c, each angle further comprises a flat sheave 1e extending toward the outside, the plan shape of which is that of a semi-circle, and the edge of which is provided with a groove 4. All these elements are cast in one piece, and during mass production, a permanent mold may be provided for, permitting these parts to be taken out without their needing any retouching but for the tapping of two coaxial openings contrived at the center of the wall 1c and at the center to the wall 1d. These tappings are each intended to receive one of the two screws 5 and 6 which bear the plates 7 and 8 of the cramp associated with each angle. Each plate 7 and 8 is connected to the end of the screw which bears it by a tenon 6a or 5a which prolongs the screw and by a clamping washer fixed to the tenon and fitted in a recess 7a or 8a of the plate. It is understood that the plates 7 and 8 are guided by the walls 1a and 1b, while for ensuring the stability of the screws 5 and 6, the walls 1c and 1d may be provided with bosses intended to cr
REFERENCES:
patent: 891121 (1908-06-01), Wichers
patent: 1770763 (1930-07-01), Wolfstyn
patent: 2448331 (1948-08-01), Staab et al.
patent: 4163547 (1979-08-01), Jerome
Andre' Gueissaz et Cie, S.A.
Hartman Judy J.
Schmidt Frederick R.
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