US960580A

US960580A - Adjustable ladder-bracket.

Info

Publication number: US960580A
Application number: US50020609A
Authority: US
Inventors: Francis T Peters
Original assignee: DAVID T WHITESELL
Current assignee: DAVID T WHITESELL
Priority date: 1909-06-04
Filing date: 1909-06-04
Publication date: 1910-06-07
Anticipated expiration: 1927-06-07

Description

F. T; PETERS.

ADJUSTABLE LADDER BRACKET.

APPLICATION FILED JUNE'4, 1909.

Patented June 7,1910.

mar

s'rars arnnr anion.

FRANCIS '1. PETERS, 0F TERRE HAUTE, INDIANA, ASSIGNOR 0F ONE-HALF T0 DAVID T. WHITESELL, OF TERRE HAUTE, INDIANA.

ADJUSTABLE LADDER-BRACKET.

T 0 all whom it may concern:

Be it known that I, FRANoIs T. PETERS, a citizen of the United States, residing at Terre Haute, in the county of Vigo and State of Indiana, have invented certain new and useful Improvements in Adjustable Ladder- Brackets; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to makeand use the same, reference being had to the accompanying drawings, and to the numerals of reference marked thereon, which form a part of this specification.

My invention relates to an adjustable ladder bracket and has for its object to provide a device which is adjustable so as tohold a scaffold plank level and rigid while the ladder is either in an inclined or a vertical position.

A further object of my invention is to provide a ladder bracket which may be raised or lowered without detaching the scaffold plank from the ladder.

A further object of my invention is to provide a ladder bracket which can be secured to two ladders in such manner that the ladders will stand alone.

A further object of my invention is to pro vide a ladder bracket which is so constructed and arranged that it is easily detached from the ladders and can be folded up and conveniently carried relieving the ladders of any protuberances or incumbrances.

With these objects in view my invention consists in the novel construction of the ladder bracket; and my invention also consists in certain novel details of construction and in combinations of parts all of which will be first fully described and afterward specifically pointed out in the. appended claim.

1 Referring to the accompanying drawing: Figure 1 is a front elevation of the bracket in operative position on a ladder. Fig. 2 is a side elevation of the same. Fig. 3 is an end view of one of the ladder standards showing the bracket-guide or channel thereon. Fig. 1 is a fragmentary view of an extension ladder showing a modified construction for attaching the bracket thereto, and

Fig. 5 is a transverse sectional view taken through Fig. 4.

Specification of Letters Patent.

Application filed June 4, 1909.

Patented June '7, 1916.

Serial No. 500,206.

Like numerals of reference indicate the same parts throughout the several figures in which;

1 indicates a ladder which comprises the two standards 2 and the usual rungs 3. In the construction shown in Figs. 1, 2 and 3 I provide the standards 2 with vertical guides 4, each vertical guide 4; being provided with a longitudinal channel 5 as clearly shown in Fig. 3, and at the lower end of said channel 5 I provide a bolt 6 shown in dotted lines in Fig. 1, the head 7 of the bolt extending into the channel 5 in order to form a stop for the ladder bracket. The bolt 6 besides forming the stop secures the guides rigidly to the ladder standards 2.

. 8 indicates the bracket which, as shown in Fig. 1, comprises a metal back or body 9, and upon each corner of the body 9 I provide guides 10, which guides 10 embrace the guides 1 on the ladder in such manner that the bracket 8 is freely slidable on the guides 4c of the ladder.

At the bottom of the bracket 8 I provide two transverse locking rods 11, said locking rods 11 being slidable within the bearings 12 and are provided with a key 13 in such manner that said rods 11 are free to slide and cannot rotate within the bearing 12. On the inner end of each of the rods 11 I provide an enlargement 1 1 j ournaled in the bearings 15 of the adjust-able arm 16, and upon the inner end of each of the rods 11 is a pin 17.

18 indicates a cam into which the inner end of each of the rods 11 enter,-said cam 18 being provided with two slots 19 into which the pins 17 pass, a handle 20 being provided for rotating the cam 18 on the rods 11. The outer ends 21 of the rods 11 enter the channel 5 in the guides 1 as is clearly shown in Fig. 1.

The adjustable arm 16 is connected to a similar arm 22 which arm 22 is pivoted to the table 23 of the bracket. In the arm 22 I provide a series of perforations 24;, and in the arm 16 I provide a thumb screw 25. The perforations or holes 24 shown in dotted lines in Fig. 1 are threaded, and the thumb screw 25 being threaded the arms 16 and 22 are adjustable as is clearly apparent in such manner that the table 23 of the bracket can be raised or lowered, said table 23 being pivoted in suitable bearings 26 as shown in Figs. 1 and 2.

27 indicates the scaffold plank which is secured to the bracket by means of a clamp 28 at the outer end and by means of a thumb screw 29 at the inner end of the table 23.

In the construction shown in Figs. at and 5 I show the bracket attached to the extension ladder. In this construction the lower end of the bracket is suitably bolted at 30 to the section 31 of the extension ladder; while I provide perforations 32 in the other section 33 of the extension ladder, and instead of having the ends 21 of the rods 11 enter the channel 5 in the guide 4: I cause the ends 21 of the rods 11 to enter the perforations 32 in the ladder section 33, thus securely locking the ladder sections together and at any desired point.

Having thus fully described the several parts of my invention its operation is as follows: In the construction shown in Figs. 1, 2 and 8 the bracket may he slid up or down 011 the guides 41, and by lowering the handle 20 of the cam 18 the pins 17 on the rods 11 are forced away from each other thus causing the ends 21 of the rods 11 to tightly bind within the channel 5 of the guides 4 and in this manner securely lock the bracket in position on the ladder. hen employing two ladders, each of which is provided with a bracket, the scaffold plank 27 can be connected to each of the brackets in the manner shown in Fig. 2 in such manner that the ladders will stand in an upright position or in an inclined position, it being of course clearly understood that the arms 16 and 22 of the bracket being adjustable the table 23 of the bracket can be secured at different angles relatively to the latter.

\V hen employing the construction shown in Figs. eland 5 the ladder can be extended to any desired position and the handle 20 turned into position shown in Fig. 4 which causes the ends 21 of the rods 11 to enter the two perforations 32 in the ladder section 33, thus securely locking the extension ladder in proper position.

Having thus fully described my invention what I claim as new and desire to secure by Letters Patent of the United States is 5- The combination with a ladder provided with vertical channeled guides, of a ladder bracket comprising a frame, a table and an adj ustable arm, a guide at each corner of the bracket frame to embrace the said channeled guides, two transversely slidabl-e rods carried on said bracket frame, the ends of said rods entering the said channeled guides, cam mechanism for separating said rods to cause the ends thereof to engage said channeled guides to lock the bracket against movement, the said table of the bracket being pivoted at the top of the bracket, and the said adjusting arm being extensible and pivoted to the said table.

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

FRANCIS T. PETERS.

\Vitnesses ORA D. DAVIS,

MABEL \VARNER.