US1211906A - Ladder-bracket. - Google Patents

Description

C. E. ALBERTSON.

LADDER BRACKET.

APPLICATION FILED JULY 29.1916.

Patented Jan. 9, 1917.

CAME/m: Emma/2230 p ewwk CLARENCE E. ALBERTSOLT, 0F MINNEAPOLIS, MINNESOTA.

LADDER-BRACKET.

Specification of Letters Patent.

Patented Jan. 9, 1917.

Application filed July 23, 1916. Serial No. 112,110.

To all whom it may concern:

Be it known that I, CLARENCE E. ALBERT- SON, a citizen of the United States, a resident of Minneapolis, county of Hennepin, State of Minnesota, have invented certain new and useful Improvements in Ladder- Brackets, of which the following is a speciiication.

The object of my invention is to provide a bracket for the use of carpenters, painters or other workmen around a building, which can be placed on a ladder rail and easily and quickly adjusted thereon as the work of the building wall progresses.

A further object is to provide a ladder bracket of strong, durable construction which may be utilized to support a scaffoldmg.

Other objects of the invention will appear from the following detailed description.

The invention consists generally in various constructions and combinations, all as hereinafter described and particularly pointed out in the claims.

In the accompanying drawings forming part of this specification, Figure 1 is a side view of a ladder with my improved bracket thereon, Fig. 2 is a front view showing a scaffolding supported on a pair of brackets and the ladders therefor, Fig. 3 is a detail sectional view through the ladder, showing the manner of engaging the bracket jaws therein, Fig. 4. is a vertical sectional view through the bracket, showing the jaws engaging with a. rail of the ladder. Fig. 5 is a transverse sectional view through the ladder rail and bracket, showing the jaws en gaging the opposite faces of the rail.

In the drawing, 2 represents the ladder rails and 3 the connecting rungs.

4 is a plate having slots 5 therein converging from the lower end toward the upper'end of the plate, as indicated in Fig. 3. These respective jaws 6 have webs 7 fitting within said slots and slidable therein and secured by suitable means, such as pins 8. These jaws have corrugated faces 9 which are adapted to engage the surface of the ladder rail and grip the same securely and as the pressure on the plate 4 will be downward, it is evident that the jaws will be drawn together as they slide in the slots 5 and consequently the greater the load on the plate the more firmly the jaws will grip the rail. The plate 4: has also a curved slot 10 near its lower end and a pivot pin 11 near its upper end on which a block 12 is mounted to oscillate. A similar block 13 is clamped to the plate 4i at any desired angle by means of a bolt 1d passing through the slot 10 of the plate 4, and the blocks 12 and 13 are connected by a rod 15. Upon this rod a bracket 16 is mounted and free to swing in the front or the rear of the ladder rail a distance equal substantially to half a circle. The angle of inclination of the rail 2 will vary, of course with the position of the ladder and I compensate for this dilference by allowing the pin 14 to slide in the slot 10, so that, regardless of the pitch of the ladder rail, the rod 15 will always be substantially vertical and the top of the bracket 16 will be level. On this bracket one end of a plank 16 is placed, while the other end is supported on a. similar bracket mounted on the rail of an adjacent ladder, as indicated in Fig. 2. This plank forms standing room for a carpenter, painter or other workman on the building, and as the work progresses, the brackets are moved up or down on the ladder rail, the rods 15 being adjusted to maintain the plank or scaffolding on the desired level. When the workman approaches the top of the ladder the brackets may be swung outwardly to the position indicated by dotted lines in Fig. 1, when the function of the bracket will be the same as described except that it will be supported in'the front instead of the rear of the ladder.

This device may be made in various sizes and in various ways the details of construction herein shown and described may be modified and still be within the scope of my invention.

I claim as my invention:

1. A. ladder bracket comprising a plate having upwardly converging guides therein, clamping jaws mounted in said guides for movement therein toward or from one another and having faces for clamping the ladder rail, and a bracket carried by said plate.

2. A ladder bracket comprising a-plate having upwardly converging guides therein, clamping jaws mounted in said guides for movement therein toward or from one another and having faces for clamping the ladder rail, and a bracket mounted to oscillate on said plate.

3. A ladder bracket comprising a plate, ladder rail clamping jaws mounted thereon,

a bolt pivoted on the upper portion of said bracket and mounted to swing in a guide providedin the lower portion of said plate, and a scaffold support carried by said bolt.

4. A ladder bracket comprising a plate having upwardly converging guides therein, jaws slidably mounted in said plate for engaging the ladder rail, and a scaffold sup porting bracket having its upper portion swiveled on said plate and its lower portion mounted to oscillate therein.

5. The combination, with a ladder rail, of a member having jaws for engaging and clamping said rail, said member having a curved guide in the lower portion thereof and a scaffold supporting bracket having its upper portion swiveled on said member and in said slot, said bracket being free to swing 25 to the front or the rear of the ladder, for the purpose specified.

In witness whereof, I have hereunto set my hand this 19th day of July, 1916.

CLARENCE E. ALBERTSON.

Copies of this patent maybe obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. O.

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