US683909A - Scaffold-bracket. - Google Patents

Description

No. 683,909. Patented Oct. 8, IBM.

C. D. CAMPBELL. SGAFFOLD BRACKET.

(Application filed Feb. 16, 1901.)

(No Model.)

B i; F g 5.

Z/zkyewes fywey/or. 5 5%; WW niMy fiww UNITED STATES PATENT OFFICE.

OLELL D. CAMPBELL, OF LINCOLN, NEBRASKA.

SCAFFOLD-BRACKET.

SPECIFICATION forming part of Letters Patent No. 683,909, dated October 8, 1901.

Application filed February 16,1901. Serial No..47,697. (No models To aZZ whom it may concern:

Be it known that I, CLELL D. CAMPBELL, residing in Lincoln, in the county of Lancaster and State of Nebraska, have invented a new and useful Scaffold-Bracket, of which the following is a specification.

My invention relates to a bracket or hanger to be placed upon the upright wooden posts or supports of a scaffolding, such as is used by mechanics in the erection and repair of buildings, to support the putlogs or crosstimbers upon which the staging is laid.

The objects of my invention are, first, to.

provide a strong and convenient adjustable support or bracket that can be readily placed at any required height upon the posts of the scaffold and that will retain its position without nailing or other fastening, gripping the post more firmly with every increase of the load; second, to provide a suitable holder for the putlog that will retainits vertical position when in use under all circumstances, and, third, to provide a pivoted dog or grip-block the face of which will bear evenly against the post, thus alfording sufficient resistance to prevent slipping without unnecessarily injuring the post. I attain these objects by means of the devices illustrated in the accompanying drawings, in which Figure 1 is an elevation of a portion of a staging-support to which my scaffold bracket or hanger is applied. Fig. 2 is a plan view of the same, and Fig. 3 is an isometric view of the same with the putlog or cross-timber in place upon the bracket.

Similar letters refer to like parts throughout the drawings.

The bracket consists of a stirrup or hanger B, which is placed-upon the post or stagingsupport A, having at one end a holder D, with an upright lug d for retaining the putlog in position. This holder has a smooth face with rounded corners comin g against the post A so it may move freely, while from its construction the seat, in which there is a short spike I, and the upright support or lug (1 always retain their respective horizontal and vertical positions, no matter to what inclination the stirrup B may be brought by weight upon the putlog. At the inner end of the stirrup B, I place a pivoted dog or grip-block (J, the corrugations of which press evenly upon the side of post A as weight is applied at the other end of the stirrup B and prevent it from sliding down the post.

It will be noticed-that the dog 0 is pivoted near the-upper edge of the hanger or stirrup 13, while the holder D is pivoted near its lower edge. The object of this arrangement will be seen by inspection of the drawings, Fig.1, for when the stirrup B is raised to the position 5, as indicated by dotted lines, in which the bolt or pivot E is exactly opposite or level with the pivot F and the holder D is thrown back from the post so the dog 0 may be released and the whole bracket moved as deing thread in the stirrup. There are also one i or more extra holes in the stirrup in which the bolt E may be inserted, thus-providing for the use of posts of different sizes, as two by six or two by eight inches, 860.

-In operation the stirrup B is placed upon the post in the position indicated by dotted lines at b, Fig. 1, and after the holder D and bolt E are in place it is brought down until the holder D rests firmly against the post A, as shown, when any additional load, as that of or upon the putlog P, will only cause the dog 0 to grip more firmly to the post and em tirely prevent its sliding upon the same.

Having thus fully described my invention, I claim- 1. A selfclamping scalt'old-bracket consisting of a stirrup B having at one end a pivoted dog 0 and at the other a putlog-holder D, the latter having a smooth surface adapted to slide down the support A until the bracket is clamped by the tilt downward on the dog 0.

2. In combination WiLh .thestirrup B the nameto this specification in the presence of siidingholdjf D which presents1 aimoglth lfaele two subscribing witnesses. to the post 7 and ms an uprig 11; ug w lie 1 1 i remains parallel to the face of the post; sub- QLELL CAMPBELL 5 stantially in the manner and for the purpose \Vitnesses:

herein set forth. ALLEN W. FIELD, In testimony whereof I have signed my \V. L. CAMPBELL.

Images