US760217A - Truss. - Google Patents

Description

No. 760,217. PATENTED MA'Y17, 1904.

J. 3. LEE.

muss.

APPLICATION FILED JAN. 5, 1904.

N0 MODEL.

WITNESSES 7mm M ATTORNEYS UNITED STATES Patented May 1'7, 1904-.

PATENT OEEIcE.

JOHN ELLIVOOD LEE, OF OONSHOHOOKEN, PENNSYLVANIA, ASSIGNOR J. ELLWOOD LEE COMPANY, OF CONSHOI-IOOKEN, PENNSYLVANIAQA CORPORATION OF PENNSYLVANIA. i

TRUSS.

SPECIFICATION forrrling part of Letters Patent No. 760,217, dated May 17, 1904.

Application filed January 5, 1904.

To all whom it may concern:

Be it known that I, JOHN ELLwooD LEE, a citizen of the United States of America, residing in Conshohocken, in the county of Mont- 5 gomery, State of Pennsylvania, have invented Improvements in Trusses, of which the following is a specification.

This invention relates to trusses, and has for its object to provide an improved adjust- Io ablefasteningdevice between :he pad-carrying arm of a truss and the pad, and, further, to enlarge the possibilities of adjustment of said pad on its arm.

In the accompanying drawings, Figure l is I5 a front view of a pad and one end of the trussspring. Fig. 2 is a longitudinal sectional view through the pad. Fig. 3 is a transverse section on the line 3 3, Fig. 2. Fig. 4 is a view of the inner face of the cover-plate of 2 the pad. Fig. 5 is a similar view, but with the pad-carrying arm in position. Fig. 6 is a view of the inner face of the clamping-disk. Fig. 6 is a detail of the screw-eye. Fig. 7 is a view, similar to Fig. 5, of a modification.

2 5 Fig. 8 is a central longitudinal section of the same, and Fig. 9 is a view of the inner face of the cover-plate of this modification. Fig.

10 is a view of a detail of a further modification.

S indicates the usual truss-spring, to which a clamping-plate P is riveted. At its extremity the plate P is disk-shaped, and a dish:

01 is clamped to it by a thumb-screw s, so that a pad-carrying arm a, integral with the said disk (Z, may be adjusted to any suitable angle and secured after adjustment.

he outer end of the arm a carries the pad T, to which it is attachedby a cover-plate O, adjustably secured to the arm and secured 4 by screws 00, Fig. 1, to the pad. The pad has a recess 7* in its body and an open portion 1- beneath the rear half of the cover-plate.

Around a central opening 0 in the coverplate (3, I preferably form serrations 0, Fig.

4, against which the serrated teeth t of the disk D, Figs. 3 and 6, may abut. The disk D is formed with a central rectangular slot R,

Serial No. 187,774- (No model.)

collars firmly against the sharp edges (1 of the disk D to firmly hold the cover-plate O and arm a in adjusted position, Figs. 2, 3, and 5. o

The screw-eye E has squared shoulders h, Fig. 6*, at the meeting of the threaded stem and the eye, so as to snugly fit into the slot It, and thus to so secure the screw-eye to the disk as to cause them to turn together on the common axis of the disk and threaded stem. A washer w, threaded onto the stem of the screw-eye E and maintained in a circular recess in the disk D, serves to hold the parts together for convenience in assembling.

In Figs. 7 to 9instead of the swiveling disk D, I have shown a rectangular plate D rigidly secured to the cover-plate. In all other respects this modification is similar to that before described.

The pad of the device of Figs. 1 to 5 maybe adjusted rotarily by means of the single thumbnut N either about the stem of the screw-eye as an axis or about the arm a as an axis.

The pad ofthe device of Figs. 7 to 9 in view 0 of the fixed plate D may only be moved rotarily about the arm a as an axis.

Instead of the two collars and the screw-eye between them I may form one collar L on the arm a and secure the screw-eye E adjacent 8 5 to one end of it, as shown in Fig. 10. In either case great precision of adjustment may be readily-secu red, and on account of the sharp edges 0, which grip into the metal of the collars L L, permanency of adjustment is in- 9 sured.

I claim as my invention 1. Atruss, having apad, a spring and a padcarrying arm therefor, a cover-plate for the pad provided with projecting clamping edges, a clamping-collar onthe rod, and a screw-eye thereon, and connected to the cover, plate adapted to draw said collar against the clamping edges, substantially as described.

2. A truss having a pad, a spring and a padcarrying arm therefor, a cover-plate for the pad provided with projecting clamping edges, a clamping-collar on the rod and a screw-eye connected to the rod and to the cover-plate adapted to draw said collar against the clamping edges, in combination with means for turning the pad with the screw as an axis, substantially as described.

3. Atruss,-having aaspring and a swiveling arm therefor, a screw adapted-to fastenthe arm and pad, and a clamping device, said pad adapted to be turned on thescrew as an axis,

' in combination 'with-fmeans' for rotating the pad on the arm as'an axis, substantially as described.

4, A truss, having a spring, a swiveling arm "therefor, and a pad at the end of the arm, a cover-plate for the pad, a plate on the coV'er- I plate provided with clamping edges, two clamping-collars on the arm, a screw rotata- V blysecured between the two said collars and passing through the cover-plate, and a nut for the screw, substantially as described.

5. A truss, having a spring, a swiveling arm therefor, and a pad at the end of the arm, a cover-plate for the pad, a plate on the coverplate provided with clamping edges, two clamping-collars on the arm, a screw rotatably secured between the two said collars and passing through the cover-plate and a nut for the screw, in combination with means for rotating said plate with clamping edges on said cover-plate, substantially as described. 6. A truss having a spring and a pad-carrying arm, rectangular-shaped portions therefor, two cylindrical collars having central openings to fit said rectangular portions, a bearing between said two collars, a screw-eye fitting said bearing and projecting through the coverplate and a nut for said screw-eye, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JOHN ELLwooD LEE. Witnesses:

M. E. WRIGHT, A. A. BARR.

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