US114034A

US114034A - Improvement in scaffoldings

Info

Publication number: US114034A
Authority: US
Publication date: 1871-04-25
Anticipated expiration: 1888-04-25

Description

JAMES D. PETTIT.

Improvement in Scaffolding.

Patented April 25, 871.

ident hm vJAMES D. PETTIT, OF ROCHESTER, INDIANA.

Letters Patent No. 114,034, dated April 25, 187.1.

IMPROVEMENT lN SCAFFOLDINGS.

The Schedule referred to in these 'Letters Patent and making part' of the same.

To all whom it may concern Be it known that I, J AMES D. PETTIT, of Rochester, in the county ot' Fulton and State of Indiana, haveinvented a new and useful Improvement in Adjustable Scatfold Benches; and, I do hereby' declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make'and use the same, reference being had to the accompanying drawing forming part of this speciiication.

The principle of my invention consists in making bench-pieces, braces, and legs independently movable, so as thereby to atford an adjustment in lengthor height at the same time, or separately, as convenience may dictate.

1n the accompanying drawing-z Figure l represents aside elevation of a scaffoldg bench constructed according to my invention.

Figure 2 is an end view, partly in section, as onthe line :v a; of tig. l.

Similar letters of reference indicate correspondingarts.

This scaffold-bench consists of the horizontal benehpiece A, legs B, and braces C. The bench-piece A consists of two parts, each of which is slotted. D represents the slots which allow the pieces to be slipped in either direction forincreasing or diminishing the length of bench.

E represesents angulajj or curved metallic plates on the ends of the legs B, by means of which the legs are attached to the bench, as seen in tig. 2.

F are the bolts by which the legs are attached, which bolts pass through the slots D. When the nuts are loosened .these bolts will slide in the slots freely in either direction.

G'- iS the slot in the legs, and

H is the slot in the brace's.

l, the bolts by which the legs and the braces are fastened together.

The braces are connected with the bench by metallic. bolts L, which pass through the plates J and slots D. As seen in iig. 2 the legs are' thrown lout from the bench by the angular p1ates.E,-while the plates J on the braces are straight. By this arrangement the legs are thrown apart when attached to the bench, as seen in iig. 2, so that the bench will'be self-supporting ou the floor.

All (or a portion) of the bolts may be provided with lever-nuts, as seen at K, for more readily adjusting the scaffold to any desired position.

The two parts of which the bench-piece A is composed are held together by the bolts L F, which connect the braces O and legs B, the nuts of which bolts are loosened when the length of the bench is altered, as those bolts pass through the slots D and slidethereiu.-

It will be -seen that, by loosening the nuts on the fastening-bolts I and' E, the legs B maybe placed at any desired angle with the bench and the bench raised or lowered thereby, and thatby loosening the bolts L the bench itself may be increased or diminished in length,

Two or more of these benches may be used for building a scaffold, boards or planks being laid on the' boliches in the ordinary manner.

Having thus described my invention,

I claim as new and desire to secure by Letters Patentlhe slotted legs B E G, movable in the slots D D, and the slotted sliding pieces which form top A, combined as described, with adjustable bracesA C for the purpose of adjusting the height by a greater'or lesser Obliquity of the legs, and the length by drawing out the top-pieces.-

. J AMES D. PETTIT. Witnesses:

J As. Ln R01 Boo'rH, FREDRICK PETISG.