US769395A - Scaffold-support. - Google Patents

Description

No. 769,395. PATENTED SEPT. 6,1904. W. J. MURRAY.

SGAFFOLD SUPPORT.

APPLICATION FILED MAR. 7. 1904.

NO MODEL. 2 SHEBTS-SHBBT 1.

PATENTED SEPT. 6, 1904.

W. J. MURRAY.

SGAFFOLD SUPPORT.

APPLIGATION FILED MAR. 7. 1904.

m E m m @N 9 M u r m m MM 7 H A H MO U. m E m ulvkv Q: X RE WQ 3 aw RE $1.2: s a 9 8 x m W N0 MODEL.

' frame buildings, and particularly in building or filling in the walls of such buildings after UN TED. STATES Patented September 6, 1904.

PATENT -OFFICE.

.SCAFFOLD-SUPPORT.

SPECIFICATION forming part of Letters Patent No. 769,395, dated September 6, 1904. Application filed M'txh 7, 1904 Serial No. 196,895. (No model.)

To all whom it may concern:

Be it known that 1, WILLIAM J. MURRAY, a citizen of the United States, residing atNew York, in the county of N ew York and State of New York, have invented certain new and useful Improvements in Scaffold-Supports, of which the following is a specification, such as will enable those skilled in the art to which it appertains to make and use the same.

Thisinvention relates to supports for scaffolds used in the construction of steel or iron the framework has been completed; and the object of the invention is to-provide improved supports for scaffolds of this class and improved means for raisingand lowering such scaffolds, and particularly for raising the scaffolds; and with these and other objects in view the invention -consists in the construction, combination, and arrangement of parts hereinafter described and claimed.

The invention is fully disclosed in the fol lowing specification, ofwhich the accompanying drawings form a part, in which the sepa-- rate parts of my improvement are designated by'suitable reference characters in each of the views, and in which Figure l is a vertical section on the .line 1 1' of Fig. 2; Fig. 2, a front view of a part of the wall of a building provided with my improved scaffold-supports, two of which are shown; Fig. 3, a plan view of one of my improved scaffold-supports; Fig. 4, a side view thereof; Fig. 5 a section on the line 5 5 of Fig. 4; Fig. 6, a section on the line 6 6 of.

Fig. 3, and Fig. 7 a section on theline 7 7 of Fig. 3.

In the drawings forming part'of this specification, reference being mad'eto Figs. 1 and 2 of the drawings, 1- have shown at a a part;

of one of the walls of a building, said wall being built around and inclosing the usual steel or'iron framework composed of horizontally-arranged beams b and vertical columns 6 The framework is also PI'OVldQd with I horizontally-arranged beams 6 placed at right angles to the beams Z2, and in filling in or building up the wall or walls a it is customary to provide a scaffold c, which must be raised, of course, as the wall is raised or the building thereof progresses.

In the practice of my invention I provide supporting-beams (Z, which in the form of construction shown are placed transversely of the top wall beam or beams b and the inner ends of the beams d are placed my improved scaffold-supports e. The beams d are arranged in pairs, as shown in Fig. 2, and in the con struction of the supports acne of which is mounted on each pair of the beams (Z, I provide a frame comprising a base e and side members a and in the form of construction shown the base 6 is provided with side flanges e, which are secured to the flanges of the beams aby keepers (Z or in any desired manner, and the beams d in the form of construction shown are U-shaped in cross-section and said beams are so placed that the flanges there- .of project outwardly at the top and bottom thereof; but the supports e may be connected with the beams (Z in, any desired manner, and said beams may be of any preferred form. The base 0 of the framework of the supports e is open, and mounted in the side members a of said frame or at the tops thereof are two transverse shafts f and g and a central shaft h. The shaft f is provided with a drum f,

which is secured thereto, and the shaft g is provided with a drum g which is secured thereto, and the shaft it is provided with a .small gear-wheel or pinion h which meshes withlarge gearwhe'els f and g at theends of the drums f and g and secured to said drums or to the shafts f and g. The drums f and 'g are also provided with cables f and g, which are secured thereto, preferably by means of eyes f and g, with which said drums are provided, and these cables support.

the scaffold c in the usual manner, being connected therewith at f and g In the form of construction shown two of of the supports (2 are employed; but it will be understood that any desired number of said supports may be employed, according to the length of the scaffold 0. One end of the shaft 71 is also provided with a ratchet-wheel II, and. mounted on said shaft and free to turn thereon is a lever-arm 1?, having a longitudinal slot or opening a", through which the ratchet-wheel [7 passes, and said lever-arm is providedat one end of the slot or opening 1? with a pawl 1?,Wlll0l1 operates in connection with the ratchet if, and said end of said lever-arm is also provided with a weight 5, and connected with the other end thereof is a cord, rope, or cable 6", which extends down to the seaflold c, and a downward pull on the cords z'f'of each of the supports e will result in'turning the shaft h of each of said suppor s and in the turning of the drums f and so as to wind the cables j and g thereon and the consequent raising of the scaffold c; Atthe'end of each pull on the cords or ropes if the weight 17* depresses the rear ends of the lever-arms if and raises the front ends thereof, and another pull on the cords or ropesi will result, as above stated, in winding the cables and g on the drums f and g and this operation may be repeated untii the scaffold is raised tothe desired point.'

The drum f in the form of construction shown is also provided at the end, opposite the gear-wheel f with a ratchet-wheel j, and a pawl f operates in connection;therewith. The shaft g is provided at the end thereof opposite the gear-wheel g" with a'brake-drum is, or, this drum may be formed on or connected with the drum g and the ratchet-wheel may be formed on or connected with the drum f and pivoted adjacent to the shaft g or to the brake-drum g is a lever m', and secured to the end of said lever adjacent to said drum is a brake-band 221 this connection being 'made -at m and the band an is passed around the brake-drum al and connected with the lever m at m", and a'downward movement of'the lever m Wlll result in applying the brakeband 02/ so as to regulate the turning of the drum g in the downward movement of the scaffold, when it is desired to lower said scaffold. In this operation of lowering the scaffold theipawl 1' must be turned backwardly, so that it will not engage the ratchet-wheel j, and it will be understood that the lowering of the scaffold must be manipulated from the top of the building or from the supports of the parts a, and in this operation the pawl 2 must also be turned out of engagement with.

the ratchet-wheel 7L2. With the form of construction shown the d rumsj and g are turned in thedirection of the arrows in in 4 when raising the scaffold, and when lowering the scaffold said drums are turned inlthe dircction of the arrows 1 and one side 2; of

the framework of the support or supports a is provided with pins or stops n and which limit the movement ofthe lever-arm T,

It will be understood that the supportingbeams d may be placed at any desired point,

and various changes in'and modifications of.

the construction herein described may be made without departing from the spirit ofv myinvention or sacrificing its advantages, and I reserve the right to make all such alterations therein as fairly come within the scope of the invention 7 Having fully described my invention, what I cla m as new, and desire to secure by Letters Patent, is i 1. A scaffold-support, comprising a framework, two parallel drums mounted therein, a

central. shaft mounted between said' drums and igeared in connectiontherewith, a lever mounted .on one end of said shaft and adapted to'turn thereon, a ratchet secured to said shaft 4 adjacent to said lever, .a pawl connected with said lever and operating in connection with saidu'at'chet, and means for operatingsaid lever, substantially as shown and described.

2. A scaffold-support, comprising a frame work, two parallel drums mounted therein, a

central shaft mounted between saiddrums and geared in connection therewitlu 'a lever mounted on one end of said shaft and adapted K to turn thereon, a ratchet securedto said shaft adjacent to said leizer, a pawl connected with said lever and said ratchet, and means for operating said lever, one of said drums being also provided at the end thereof opposite said lever with a brake, substantially as shown and described.

3. A scaffold-support, comprising a framework, two parallel drums mounted therein, a

central shaft mounted between said drums and geared in connection therewith, a lever operating in connection with 1 mounted on one end of said shaft and adapted I to turn thereon, a ratchet secured to said shaft adjacent to said lever, a pawl connected with said lever and operating in connection 1th said ratchet and means for operating said le-' i ver, one of said drums being also provided at the end thereof opposite said lever with a I0 brake, and the other with a lock,substantially as shown and described.

4:. A scaffold-supportfor steel-frame structures, comprisingbeams adapted to be con-- nected with the frame so as to project therefrom, a frameadapted to rest on the pro ecting ends of said beams, two parallel drums mounted in said frame, a central shaft mounted between said drums and geared in connec ,tion therewith, means for turning said drums,

and means for locking said drums, substantially as shown and described.

A,scaffold-support for stcel f'rame struc- LurcsfIpmI nising bcamsadaptcd to be connected'with the" frame so as to project therefrom, frame adapted to rest on the projecting end of said beams, two parallel drums mounted in said frame, accutral shaft mounted between said drums and geared m connec' tion therewith, means for turning said drums, ence ofthe subscribing witnesses, this 5th day means for locking said drums, and cables of March, 1904.

Wound on said drums and adapted to support a scafiold, substantially as shown and de- WILLIAM J:MURRAY' 5 scribed. Witnesses:

In testimony'that l claim theiforegoing as F. A. STEWART, my invention I have signed my name, in pres- C. E. MU'LREANY.

Images