US1799001A

US1799001A - Curtain-stretching device

Info

Publication number: US1799001A
Application number: US349813A
Authority: US
Inventors: Jr William J Carter
Original assignee: Individual
Current assignee: Individual
Priority date: 1929-03-25
Filing date: 1929-03-25
Publication date: 1931-03-31
Anticipated expiration: 1948-03-31

Description

March 31, 1931. w, CARTER, JR 1,799,001

CURTAIN STRETCHING DEVICE Filed March 25. 1929 JET/557275 ZZW/iam J'Z'EEZEE Jif- Patented Mar. 31, 1931 UNITED STATES WILLIAM J. CARTER, JR, AKRON, OHIO CURTAIN-STRETCHING DEVICE Application filed March 25, 1929. Serial No. 349,813

This invention relates to curtain-stretching devices, and more particularly those of the general type disclosed in my prior Patent No. 1,686,368, dated Oct. 2, 1928, embodying horizontal and vertical bars, each equipped with a row of impaling pins, together with clamping brackets slidably mounted on said bars at their crossing points for holding said bars adjustably fixed on each other.

The present invention has for its object to provide an improved clamping bracket of eflicient and inexpensive type. To this end I have devised a bracket, the body of which is adapted to be made of one piece of sheet metal, and formed with channels to receivethe frame bars, the bracket body being suitably combined with clamping jaw bolts for engaging said bars.

Of the accompanying drawings, Fig. 1 is 2 a front elevation, partly broken away, showing a curtain-stretcher provided wit-h my improved clamping brackets. v

Fig. 2 is an edge view, partly in section on the line 22 of Fig. 1.

F ig. 3 is a perspective view of the bracket body and part of one jaw bolt in dis-assembled relation.

Referring to the drawings, which illustrate a preferred embodiment of my inven- 30 tion, the stretching frame includes a pair of horizontal members, rails or pin bars 10, each having a row of fixed, outwardly-slanted impaling pins 11 projecting forwardly from an inclined face 12 of said barset back from the vertical face 13 thereof to form a recess for receiving the horizontal edge of the work and bringing it into the same plane with the vertical edges.

14, 14. are a. pair of vertical frame members, rails or pin bars, each provided with a row of impaling pins 15 set in a recess on the outer side of said bar and adapted to project forwardly beyond said bar to receive the vertical edges of the work. These pins 15 may be made of a piece of wire bent to form an eye 16 whereby the pin is pivoted on a nail 17 driven into the bar 14;, an arcuate heel 18 forming a stop to abut against a ledge 19 of said bar and a sharpened impaling por- 50 tion 20 as described in my co-pending application, Serial No. 349,814 filed concurrently herewith, or they may have any other suitable construction and arrangement such as the one described in my aforesaid Patent No. 1,686,368. The brackets 21 forming the subject of this application are located at the four corners of the stretching frame and the body of each is made of a single piece of sheet metal bent to form a horizontal channel member 22 for receiving the bar 10,'and a vertical channel member 23 for receiving the bar 14, these brackets being made as rights and lofts and two of each construction being required at diagonally opposite corners of the frame. w a

The rear plate 2 1 of the horizontal channel member has a plate'25 bent horizontally at right-angles thereto for engaging the upper or the lower side of the corresponding pin bar 10, as the case may be, and a plate 26 bent downwardly at right-angles from the outer edge of said plate 25 for engaging the front side of said bar. 27 is an aperture formed near the outer edge of the plate 25 for the passage of the stem 28 of a bolt 29 having a clamping jaw 30 at its lower end, and a wing nut 31 screwing on its upper end and resting against plate 25, while the plate 26 has a semi-circular grooved or socket portion 32 pressed therein for encasing the stem of said bolt in front of the face 13 of the bar 10. 1 j

The vertical channel member 23 has an inner side plate 33 at right-angles to the rear plate 2 1 of channel member 22, a rear plate 34 bent at right-angles to said plate 33 and a pair of front lips or plates 35 36 at right-angles to the inner side plate 33, the former of these lips being located above the rear plate 2 1 and taken out of themetal from the top plate 25 as indicated by the recess 37 leftthereim'while the lower lip 36 is located below said rear plate 2 1. :The inner side plate 33 is formed with an aperture 38, and in the rear plate 34 is pressed a semicircular grooved or socket portion 39 for receiving the stem of a clamping jaw bolt 40 similar to the bolt 39, the wing nut 11 of said bolt 40 abutting against the inner side plate 33 of the vertical channel and the jaw 42 thereof taking over the outer side edge of the pin bar 14.

A grooved portion or ridge 46 is pressed in the plate 25, in the same plane with the socket portion 32, and similar grooved portions or

ridges

47, 48 are pressed in the plates 33 211(1'24, in the same plane with the socket portion 39, these ridges serving to stiffen the bracket structure and also contributing to the proper formationof the

bolt holes

27 and 38.

This form of bracket body is light and strong, it may be inexpensively made of sheet 1 metal and is usable with smaller bolts than the one described in my aforesaid Patent -1,686,368,-without any sacrifice of the qualities desired in a corner bracket for the intended purpose.

In addition, I have here shown a vertlcal brace bar43 located in an intermediate position-about midway of the stretching frame for connecting the horizontal pin bars 10,

said brace bar having a fixed upper bracket it-bolted thereto and engaging the lower edge of the upper bar 10, and a lower clamping bracket mounted for vertical sliding adjustment on'the-brace bar and engaging theupper edge of the lower bar 10, this feature being described and claimed in my aforesaid co-pending application, Serial No.

It'will be understood that the described details maybe more or less varied without departing from my invention as defined in the claims.

I claim:

1. In a curtain stretcher, the'combination with a pair of crossed bars, of a clamping bracket adjustably connecting said bars in fixed relation and including a single-piece, sh'eet-metal'body bent to form two channels at right-angles slidably receiving said crossed bars, the walls of the respective channels having bolt-receiving grooves and apertures formed therein and apair of jaw-bolts having their'stems interposed between and disposed transversely of the stretcher bars and theadjacent channel walls andreceived in said grooves and apertures.

I 2. A curtain-stretcher clamping bracket 'for adjustably connecting a pair of crossed pin bars in fixed relation, said clamping bracket including a single-piece, sheet-metal body formed with two bar receiving channels, the back wall of the first channel and the inner side wallof the second being connected by a right-angle bend, andsaid inner side wall being apertured for a jaw-bolt stem, a rear wall for the second channel located at right-angles to said inner side wall and formed with a jaw-bolt groove, an outer wall for the first channel formed at right-angles with its'back-wall and a front wall at right angles with the outer wall, respectively formed with an aperture and a groove for a jaw-bolt stem, a front-wall lip formed on said inner side wall of the second channel, of metal removed from the outer side Wall of the first channel, and a pair of clamping jaw bolts having their stems received in said aplertures and grooves of the respective channe s.

3. A curtain-stretcher corner bracket having a body formed of sheet metal with bar channels each having two walls at right angles, and substantially semi-circular clamping-bolt stem sockets substantially at right-angles, each formed in one of said channel walls, said bracket being also formed with bolt-stem apertures, each located in the other'wall of the corresponding channel in line'with said sockets.

4:. A curtain-stretcher corner bracket having a body formed of sheet-metal with bar channels, said body being deformed to :provide substantially semi-circular clampingbolt stem sockets, apertures in "said body in line with said sockets, and stiffeningridges in adjacent walls of said body in the 'same planes with said sockets.

5. A curtain-stretcher clamping bracket for adjust-ably connecting a pair of crossed pin bars in fixed relation, comprising a body providing two bar receiving channels, the

said inner side wall and formedwith' a bolt receiving groove transversely there'acr'oss, said inner side wall being 'aperturedinlin'e with said groove, an outer wall for'the first channel formed at right-angles with its back wall, and a front wall at right-angles with the outer wall and formedwith a bolt receiving groove transversely there'across, said outer wall of the first channel'being apertured in line with's'aid front wall groove.

6. A curtain-stretcher clamping bracket for adjustably connecting a pair of crossed pin bars in fixed relation, comprising'a sheet metal body/bent to form two channels at-subs tantially right-angles to each other for receiving a pair of crossedpin bar's, "awall of each channel having a bolt receiving groove transversely thereacross on the inner bar engaging side thereof, a wall of each channel adjacent the grooved wall thereof formed with a boltreceivin'g aperture therethrough in line with such groove, and a pin bar engaging and securing bolt disposed across each channel in the'groove thereof and-extended through the adjacent wallaperture. In witness whereof I'havehereunto set my hand this 22d day of March, 1929.

WVILLIAM J. CARTER, JR. I