US1947794A

US1947794A - Table for constructing screens and the like

Info

Publication number: US1947794A
Application number: US668251A
Authority: US
Inventors: Charles R Parrish
Original assignee: Individual
Current assignee: Individual
Priority date: 1933-04-27
Filing date: 1933-04-27
Publication date: 1934-02-20
Anticipated expiration: 1951-02-20

Description

Feb. 20, 1934. Q R p s 1,947,794

TABLE FOR CONSTRUCTING SCREENS AND THE LIKE Filed April 27, 1955 2 Sheets-Sheet l nz I Feb. 20, 1934. C R, p s 1,947,794

TABLE FOR CONSTRUCTING SCREENS AND THE LIKE Filed April 27, 1933 2 Sheets-Sheet 2 Patented Feb. 20, 1934 UNITED STATES PATENT OFFICE TABLE FOR CONSTRUCTING SCREENS AND THE LIKE 7 Claims.

The invention relates to apparatus for building framed structures, such as screens for windows, doors and the like, and has for its object to provide a table-like device having a bed or top upon which the elements of the structure are assembled and clamped in proper relation to be ultimately secured together to form the desired structure, said apparatus including guide rails extending from one corner of the bed transversely and longitudinally, corner brackets slidable on said rails and adapted to be clamped in adjusted position thereon, guide bars extending from said brackets in intersecting relation, a floating clamp adapted to secure said bars at the intersection of the latter, fabric feeding rolls located at one end of the table adapted to deliver mesh fabric to the screen frame clamped to the bed and to stretch the partially attached fabric over said frame preparatory to a complete attachment of the fabric to the frame.

The invention is illustrated in the accompanying drawings, in which:-

Fig. 1 is a plan view; Fig. 2 is a side elevation. 2 Fig. 3 is an enlarged fragmentary plan view,

partly broken away, of one corner bracket.

Fig. 4 is a section on lined-40f Fig. 3. Fig. 5 is a fragmentary longitudinal section. Fig. 6 is a fragmentary plan view illustrating 30 the relation of the guide bars and floating corner bracket.

Fig. 7 is an elevation, partly in section, of the parts shown in Fig. 6.

Fig. 8 is a section-on line 88 of Fig. 6. Fig. 9 is a section on line 9-9 of Fig. 6. Fig. 10 is a section on line ll0 of Fig. 6. Fig. 11 is a fragmentary plan view of the feed rollers and accessories.

Fig. 12 is a side elevation of the same. 40 Fig. 13 is a section on line 13-13 of Fig. 11.

Referring to the drawings, 1 indicates the longitudinal supports for the table-like member provided with legs 2 and a fiat bed or top 3, the latter being preferably rectangular in form and 0 having secured at or near one end thereof a guide rail 4 in the form of an angle iron and along one longitudinal edge a similar guide rail 4, said rails being mitered at their junction at one corner of the bed and constituting abutments with which one rail and one stile of which the screen or similar structure is fabricated engage in the manner and form illustrated in Fig. l.

Slidably mounted on the guide rail 4 is a corner bracket having an upstanding flange of substantially the same height as the vertical flange of the guide rail 4, which bracket is provided with a y0ke6 which straddles the guide rail 4 and is adapted to be clamped to said guide rail and held rigidly in its clamped position by means of a wear block or strip extending longitudinally of the yoke and which is adapted to be forced into enagement with the vertical flange of the guide rail by means of a set screw 9 engaging a threaded boss 8 formed as an extension of a reinforcement 7 of the said yoke 6. Secured to the free end of the bracket 5 by rivet 11' is a guide bar 11, which extends longitudinally of the bed 3 in substantial parallelismwith the guide rail 4.

A similar corner bracket 5 is adjustably mounted on guide rail 4 and is adapted to be locked in its adjusted position by a set screw 9', said corner bracket having a guide bar 12 attached to its free end by rivet l2 and extending transversely of the table and normally in parallelism of the end guide rail 4.

The two

guide bars

11 and 12 are adapted to be clamped together, at their intersection, to form a square corner by means of a special form of floating clamp which comprises a right-angled base 15 adapted to engage the top of the bed and provided with intersecting rabbets 16 on the inner edges of its top surface to receive and guide the

bars

11 and 12 and lock the latter to form a rectangular corner abutment for the window or dbor screen, said bars being held in locked position by a set screw 19 threaded in a yoke piece 1'7, which is secured in diagonal relation to the base 15 by rivets 18.

By this particular arrangement of parts, it is possible to secure the rails and stiles of the rectangular frame constituting the body portion of the closure for a window, door or the like, and more particularly the frame for a screen, in which the joints at the corners are mitered and adapted to be fastened together by a series of corner brackets or braces to produce a rigid structure. By virtue of the adjustable corner defining brackets 5 and 5' mounted on the guide rails 4 and 4', the floating clamp and. the intersecting

guide bars

11 and 12, a rectangular frame of any size within the capacity of the table or bed may be assembled and firmly clamped in position on the bed to permit the final fastening means to be attached at the various points of juncture of the frame elements to convert the same into a rigid structure, and, if the framework is to receive a covering of wire mesh fabric. to permit the latter to be applied to the framework while the latter is still held in its clamped relation.

In order to facilitate the application of the wire mesh fabric to the assembled frames, there is mounted on the legs at one end of the table a pair of brackets 20 in which a roll of mesh fabric may be supported to permit free rotation of the roll, so that the mesh fabric may be withdrawn therefrom, as desired.

Secured to the end of the bed 3, above the brackets 20, are brackets 25, in which are mounted a pair of transversely located

feed rolls

31 and 34. The roll 31 is provided with end pintles 32, which are journaled in longitudinal slots 26 formed in each bracket 25 and in loose bearing blocks 27 in the inner ends of said slots. The roll 34 is provided with end pintles 35 likewise mounted in the slots 26 and engaged by bearing blocks 28, which latter are acted upon by helical springs 29 mounted in the outer ends of the respective slots and held in position by cover plates 30. The springs 29 normally tend to force the rollers together, so that, when one of said rollers is rotated by means of a crank 45 on theend of its pintle or journal, the rotation of the rollers will feed the wire mesh fabric through the latter. In order to separate the rolls a sumcient distance to permit the mesh fabric to be introduced between them, the pintles 35 of the roll 34 are each provided with a cam 36 having an operating handle 3'7, so that, when the cams are moved to the position illustrated in Fig. 13, roll 34 will be moved away from roll 31 a slight distance. When the cams are adjusted to the position illustrated in Fig. 12, the springs 29 will force the roll 34 into engagement with roll 31 or into engagement with the mesh fabric introduced between the rolls.

As stated, the particular function of these rolls is to facilitate the application of the mesh fabric to the screen frame, that is to say, to feed a sufficient length of the mesh fabric to cover the frame and, when one end of the mesh fabric has been attached to the frame, to apply the necessary tension to the fabric to stretch the same taut over the frame, whilethe additional attaching means are applied to secure the fabric to the frame.

After the necessary length of fabric has been fed by the rolls 34 and one end of the fabric secured to the remote end of the frame, the feed rolls are rotated in a direction opposite that required to feed the fabric, thereby stretching the fabric between its line of attachment to the screen frame and the feed rolls and the fabric is held in this stretched condition by means of spring pawls 41 attached to the brackets 25, which cooperate with ratchets 40 fast on the end pintles 35 of the roll 34, as more particularly shown in Fig. 12. After the mesh fabric has been stretched over the frame, it is tacked or secured in position on the frame in the usual manner and the overlapping portions of the fabric are trimmed away, thereby leaving the free end of the fabric extending through the rolls ready for the next operation.

During all of the operations, the screen or door frame is held in firmly clamped relation on the bed and, when the structure has been completed, it is readily released from such clamped relation by casting loose the

corner brackets

5 and 5 and the floating clamp.

What I claim is:

1. A table for constructing screens and the like, comprising a bed, guide rails extending from one corner transversely and longitudinally of said bed, corner brackets slidable on said rails, means for clamping said brackets in adjusted position on said rails, guide bars extending from said brackets in intersecting relation, and a floating clamp adapted to secure said bars at the intersection of the latter.

2. A table as described in claim 1, in which the corner brackets are provided with guiding and. clamping yokes engaging the guide rails.

3. A table as described in claim 1, in which the floating clamp comprises a base having intersecting rabbets disposed at right-angles to each other to receive the guide bars and a clamping yoke spanning the intersection of the rabbets.

4. A table for constructing screens and the like, comprising a bed, fixed guide rails extending from one corner transversely and longitudinally of said bed, clamping corner brackets adjustable along said rails, guide bars extending in intersecting relation from said corner brackets, a floating clamp adapted to secure said bars at the intersection of the latter, and transverse rolls at one end of the bed for feeding and stretching mesh fabric over a frame clamped to the bed.

5. A table as described in claim 4, in which the feed rolls are engaged with each other by spring pressure.

6. A table as described in claim 4, in which the feed rolls are engaged with each other by spring pressure and are provided with cam mechanism for separating them.

7. A table as described in claim 4, in which one of said feed rolls is provided with a stop device to lock the same to hold the mesh fabric in clamped relation between the rolls.

CHARLES R. PARRISH.