US2066984A - Scaffold - Google Patents

Description

Jan. 5,1937. A 2,066,984

SCAFFOLD Original Filed Oct. 11, 1934 5 Sheets-Sheet l Inventor Attorney Jan. 5, 1937. I c. K. LAMB Original Filed Oct. 11, 1934 5 Sheets-Sheet 2 Jan. 5, 1937. c, K LAMB 2,066,984

SCAFFOLD Original Filed Oct. 11, 1934 5 Sheets-Shea; 3

Jan. 5, 1937. C K LAMB 2,066,984

' SCAFFOLD Original Filed Oct. 11, 1934 5 Sheets-Sheet 4 1C "/I b 26' /5 27 3.1 1 A r 2 I i 1 1 i I i A Yr 5%; W

ii J 73' i l i I I" I LJ 4f LJ Inventor Jan. 5, 1937. c K LAMB 2,066,984

SCAFFOLD Original Filed Oct. 11, 1934 5 Sheets-Sheet 5 2 EH 2 A5 o 2 7 provide a scaffold having a novel form and con- Patented Jan. 5, 1937 UNITED STATES PATENT OFFICE 4 SOAFFOLD Renewed August 18, 1936 3 Claims. (Cl. 304-13) This invention relates to scaffolds and has as its object the provision of a scaffold especially adapted for use in repairing chimneys and the An object of the invention is to provide a scaffold having improved safety means over the scaffolds now generally employed.

A still further object 'of the invention is to structionof guard rail.

A still further object of the invention is to provide a scaffold which may be readily adapted to chimneys or smoke stacks of either cylindrical, square, or octagon shape in cross section.

A still further object of the invention is to provide a scaifold capable of a wide range of adjustment for adapting the same to chimneys and the like of the cram sectional shapes mentioned.

The invention, together with its objects and advantages, will be best understood from a study of the following description taken in connection with the accompanying drawings wherein:

Figure 1 is a view partly in section and partly in elevation illustrating the application of the invention to a chimney or smoke stack.

Figures 2 and 3 are detail views taken substantially on the lines 2-2 and 3-3 respectively of Figure l.

Figure 4 is a fragmentary elevational view of A a portion of the scaffold.

Figure 5 is an elevational view of a bracket and part of the guard rail structure associated therewith.

Figure 6 is a fragmentary plan view of the connected ends of the securing cable.

Figure 7 is a fragmentary detail sectional view showing the manner of securing one of the guard rail posts to one of the brackets.

Figure 8 is a perspectiveyiew showing the suspension hook associated with the bracket.

Figure 9 is a detail perspective view .showing the manner of securing the guard rail to one of the rail posts.

Figure 10 is a detail sectional view showing the manner of retaining the sliding members of a section of the hand rail in slidable assembled relation.

Figure 11 is a detail view showing the manner of securing one end of a guard rail section to one of the guard rail posts.

Referring to the drawings by reference numerals, it will be seen that any number of substantially triangular brackets l are provided. The sides of each bracket l are formed preferably of wood and the side 2 of each bracket that is adapted to be disposed adjacent to and parallel with the chimney is provided at its lower end, and on the side confronting the chimney with a spacer block 3 shaped to conformably fit against the chimney wall. At its upper end the side 2 of the bracket is provided with a hook 4 that is formed from a metal strap and is secured to the bracket by rivets 5 and a retaining strap 6 all of which is clearly shown in Figure 5.

At the joined ends of the sides 1 and 8 of the ly are threaded home against the block it and. I

the underside of the bracket member l to positively secure the post l2 to the bracket. The lower end of the post i2 is bent inwardly, fiat tened, and secured to the side 8 of the bracket by a rivet as at l5.

The post I 2 supports a guard rail consisting of a plurality of pairs of slidably associated angle bars I 6 and I1, each one of which at one end has hinged thereto as at! an attaching leaf or extension l9. Each angle bar has secured to the hinged extension equipped end thereof one end of a chain 20, the other end of which is provided with a frame 2!, of triangular shape. Frame 2| embraces the members It and I! in a manner shown in Figure 10 and serves to retain said member in sliding engagement.

In actual practice, there is first secured about the chimney or stack 22 at the desired elevation a cable 23 the ends of which are drawn together and connected through the medium of a suitable turnbuckle 24. A plurality of apertured spacer blocks 25 are slidably associated with the cable 23 and engage the chimney 22 'in the manner clearly shown in Figure 3 for slightly spacing the cable 23 relative to the stack or chimney.

The required number of brackets I are then brought into use, each bracket having its hook 4 engaging over the cable 23 in a manner clearly shown in Figure 1. The brackets I to the desired number are spaced circumferentially about the stack 22 as suggested in Figure 3. The floor boards 26 for the scaffold are then arranged floor boards 26 are fastened or secured in place through the medium of suitable cables 21 and in amanner now generally resorted to.

The guard rail made up of the slidably engaged members l6 and I1 is next set up, the extension leaves I! of the sections or members l6 and I1 being riveted as clearly shown in Figure 9 and indicated at 28 to threaded caps 29 that are screwed onto the upper ends of the posts or standards I! as clearly shown in Figure 11.

As an added precaution, a guard cable 3|! may be employed and the same extends around the scaffold below the hand rail, being threaded through suitable rings 3| provided on the posts or standards l2 at suitable points downwardly from the upper ends of said standards. The ends of the cable 30 may be secured together in any suitable manner, if desired, being equipped with snap fasteners to engage certain of the rings 3| in a manner thought apparent and to secure the cable 30 in proper position. I

It is thought that, from the above, a clear understanding of the construction, use and adwantages of a scaffold of this character will be 5 readily had and that it will be observed that such a scaffold may be set up with a minimum amount of labor and in a minimum amount of time and will provide a safe working platform for steeplejacks, chimney sweeps and the like.

What is claimed is: 1. In a scaffold of the character described, a plurality of floor board supporting brackets adapted to be mounted on the. structure upon which work is to be done, posts rising vertically from said brackets, and guard rail sections connecting adjacent posts, each guard rail section including a pair of telescoping members, each member being provided at one end with a hinged leaf secured to a post, a flexible element secured at one end to the leaf equipped end of each element, and a frame member secured to the free end of the flexible element and embracing the telescoping members of the sections for retaining said members in assembled relation.

2. A guard rail for a scaffold comprising a plurality of posts adapted to be secured at one end to the ,scafiold to extend vertically upwardly from the floor of the scaffold, and guard rail sections supported between pairs of adjacent posts, each guard rail section comprising a pair of slidably associated members each of which is provided at one end with a leaf hinged thereto and adapted to be secured to a post, retaining frames embracing the slidably engaged members, and flexible elements connecting said frames with said members.

3. A guard rail including a pair of angle iron members slidably engaging one another, each of said members having an attaching leaf hinged to one end thereof, a triangular loop embracing said members for retaining the latter in telescoping relation, and flexible means connecting a said loop with one of the angle iron members.

CLYDE K. LAMB.

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