US875970A

US875970A - Safety scaffold-bracket.

Info

Publication number: US875970A
Application number: US38162507A
Authority: US
Inventors: John R Watt
Original assignee: Individual
Current assignee: Individual
Priority date: 1907-07-01
Filing date: 1907-07-01
Publication date: 1908-01-07
Anticipated expiration: 1925-01-07

Description

No. 875,970. PATENTED JAN. 7, 1908. J. R. WATT.

SAFETY SGAFPOLD BRACKET.

APPLICATION TILED JULY 1. 1907.

F ,4 witnesses w 4. x Z mentor Attorney UNITED STATES PATENT oFFIoE.

.TOHN R. WATT, OF DETROIT, MICHIGAN, ASSIGNOR OF ONE-HALF TO JOHN C. JOHNSON, OF

DETROIT,

MICHIGAN.

SAFETY SCAFFOLD-BRACKET.

Specification of Letters Patent.

Patented Jan. 7, 1908.

Application filed July 1,1907: Serial No. 381.625-

To all whom it may concern:

Be it known that I, J OI-IN R. WATT, a citizen of the United States, residing at Detroit, in the county of WVayne and State of Michigan, have invented certain new and useful Improvements in Safety Scaffold-Brackets, of which the following is a specification.

My invention has for its object a safety scaffold bracket, and it consists of the construction, combination and arrangement of devices hereinafter specified and claimed and illustrated in the accompanying drawings, in which,

Figure 1 is a view in side elevation. Fig. 2 is a view in perspective. Fig. 3 is a plan View showing parts in horizontal section.

The aim of my invention is to provide a safety adjustable scaffold bracket of superior construction and utility, as well as of economical construction, and one which may be readily applied and put into use.

I carry out my invention as follows:

In the drawings a represents an upright or post to which the bracket is applied, the post standing out a desired distance from the wall of the building. The post may consist of an ordinary piece of 2x4 scantling, or may be of any desired size or form. Upon the post I engage a bifurcated or open clevis 1) pro vided with parallel arms 0, d and a connecting cross arm 6. The extremities of the arms 0, d are curved to form hooks f, g. Upon the connecting cross arm e, I engage an upright toothed plate h, the plate being bent intermediate its upper and lower extremitiesto provide an eye i in which the cross arm e is swiveled. When applied to the post the teeth of the plate are engaged against the adjacent side of the post. In use the clevis will hang at a descending angle to the plate, preferably at about an angle of 45. Supported upon the hooked extremities of the clevis is a support comprising an upright arm 7c, the lower extremity of the support being bent outwardly and upwardly to form a hook Z to support a put-log. The upper extremity of the upright arm of the support is. provided with a cross bar or bolt m, the upper end of the same arm being turned as shown to engage the cross bar. The support is engaged with the clevis by simply hooking the cross bar into the hooks of the clevis. The upright arm of the support is also provided preferably with a clip a to engage astride the post to assist in holding the support firmly in position. I provided with slots 9) through which nails I may be engaged if desired to more firmly I hold the device upon the post. In use a put log 11 may be engaged in the base of the support, the opposite extremity of the put-log being engaged in the wall of the building, or a ledger '1" may be located upon the lower extremity of the support. The device may be employed with posts of different sizes simply l by lengthening or shortening the connecting r bar 0 of the clevis upon which the toothed plate is engaged. The cross bar m engaged with the top of the support is preferably made of a length to engage upon a clevis of any desired width.

The operation of the device will readily be understood. The clevis arms being open at their extremities, the clevis may be readily slipped upon the post when the post is in place, at any desired point, and the cross bar of the support engaged in the hooks of the clevis. The ledger or put-log is then engaged upon the support, the weight upon the device forcing the teeth of the toothed plate into the post. Obviously the greater the weight, the greater the security of the engagement of the bracket with the post. The upright portion of the hook of the support may also be provided with an orifice t through which a nail may be driven into the ledger or put-log. It will be observed that the device is not required to be slipped over the end of the post, but, the clevis being formed with open arms, may he slipped upon the post readily, as above observed, at any desired point. The hooks of the plate h are formed at a descending angle to more readily engage the post.

\Vhen it is desired to shift the location of the bracket, the weight is lifted from the support, the toothed plate is also released from the post, when the device may readily be slipped upward and engaged at another given point quickly and with ease as soon as the weight rests again upon the support. It will thus be readily perceived that the device may be readily applied, that there are no bolts or nuts or screws to secure any part with another so that the device constitutes an adjustable safety scaffold bracket.

What I claim as my invention is:

1. A safety scaffold bracket comprisin a clevis open at one end thereof formed with parallel arms provided with hooks at their The clip may be I 2. A safety scafiold bracket comprising clevis open at one end thereof formed with parallel arms provided with hooks at their extremities and with a connecting cross arm intermediate said parallel arms, an upright toothed plate having a swiveled engagement intermediate the extremities with the cross arm of the clevis, and a support formed with an upright arm having its upper end removably suspended from the hooks of the clevis, and provided with a support at the lower end thereof, said arm provided with a cross bar at its upper end to removably engage the hooks of the clevis arms.

3. A safety scaffold bracket comprising a clevis open at one end thereof formed with parallel arms provided with hooks at their extremities and with a connecting cross arm intermediate the parallel arms, an upright toothed plate having a swiveled engagement intermediate its extremities with the cross arm of the clevis, and a support formed with an upright arm having its upper end removably suspended from the hooks of the hanger and provided with a support at its lower end, the upright arm of the support provided with a rearwardly projecting clip, the teeth of said plate projecting downwardly above and below its swiveled engagement with the cross arm.

In testimony whereof I aflix my signature 0 in presence of two witnesses.

JOHN R. WATT.

Witnesses:

JAMES SWAN, E. M. SPIELBURG.