US1187437A - Ladder-bracket. - Google Patents

Description

D. R. LUCAS.

LADDER BRACKET.

1,1 APPLICATION FILED AUG. 27, I914; Patented June 13,

2 SHEETS-SHEET 1.

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LADDER BRACKET.

APPLICATION FILED AUG. 2], I914. Patented June 13,

2 SHEETS-SHEET 2.

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A TTUR/VEYS UNITED STATES PATENT OFFICE.

DAVID B. LUCAS, or KENTON, omo;

LADDER-BRACKET.

1 '0 all whom it may concern:

Be it known that 1, DAVID R. LUCAS, a citizen of the United States, and a resident of Kenton, in the county of Hardin and State of Ohio, have made certain new and useful Improvements in Ladder-Brackets, of which the following is a specification.

My invention is an improvement in ladder brackets, and has for its object to provide a bracket of the character specified, for use in connection with an ordinary ladder, for rigidly supporting a scaffold alongside a building, and wherein the arrangement is such that the scaffold may be connected with any part of the ladder, either the front or the rear, and at any desired point in the length of the ladder.

In the drawings: Figure 1 is a side view of the improvement in use, Fig. 2 is a front view, Fig. 3 is a perspective view of a portion of the same, Fig. 4 is a top plan view, Fig. 5 is a vertical section at right angles to the plane of the ladder, Fig. 6 is a detail perspective view of a portion of the bracket, Fig. 7 is a top plan view of a modified form of brace with parts in section, and Fig. 8 is a section on the line 88 of Fig. 7 looking in the direction of the arrows adjacent to the line.

The present embodiment of the invention is shown in connection with a ladder consisting of the usual stiles 1, connected at spaced intervals by rungs 2. The ladder is shown adjacent to a fixed object 3, as for instance a building, and the top of the ladder is spaced apart from the building, by means of a yoke shaped bracket, consisting of a body 4 and arms 5 extending at approximately a right angle from the body. The arms 5 of the bracket are pivoted to the upper ends of the stiles, as indicated at 6, and it will be noticedthat the yoke shaped bracket is provided at the junction of each arm with the body with an extension 7. The outer end of each arm is curved outwardly just before it joins the body, and the extensions 7 are extended beyond the junction of the arms and the body in the same are. Abrace 8 is pivoted to each arm, as indicated at 9, near the junction of the arm with the body, and each brace is provided at the end adjacent to the arm, with an outwardly ofiset portion 10, and the free end of the offset portion is pivoted to the arm. At the opposite end each brace is Specification of Letters Patent.

Patented June 13, 1916.

1 provided with an angular portion 11, and

each of the angular portions is curved slightly longitudinally, as shown, and is 1011- gitudinally; slotted, as indicated at 12. These portions 11 lap upon theouter faces of the stiles, and a bolt 13 is passed through an opening in each stile, and through the slot of the adjacent brace, and is engaged by a nut 14 outside of the stile. It will be evldent that by loosening the nuts, the braces may be adjusted with respect to the stiles, to raise or lower the yoke shaped bracket. The lugs 7 of the bracket engage the face of the building 3, to support the upper end of the ladder out of contact with the building, and in spaced relation.

A scafiold 15 may if desired be laid upon the yoke shaped bracket, the board resting upon the arms and the body, as shown, and 1t will be noted that the body is spaced apart from the building, so that the inner edge of the innermost plank forming the scaffold rests upon the body. It will be understood that as a rule in scaifolds two ladders are used, each provided with a yoke shaped bracket and the braces 8. The outward offsetting of the upper ends of the braces brings the upper ends of the braces outside of the arms of the yoke shaped bracket, and since the braces are outside of the stiles, the stiles do not interfere with the movement of the braces.

The bracket comprises a pair of bars 16 each of which is T-shaped in cross section, comprising a body and a web extending longitudinally of the body at the center thereof, and perpendicular to the body. The web is provided at one end with a series of notches or recesses 17, arranged in spaced relation, and a latch bar 18 is pivoted to the web, at the inner end of the series of notches, by means of a bolt or rivet 19. The upper face of the latch bar is notched, as indicated at 20, to correspond with the notch of the web of the bar, and a clip 21 is provided for holding the free end of the bar from downward movement. The bars 16 are adapted to engage a rung of the ladder, the rung being received in the recesses 17, and the bar 18 is swung up on the under side of the rung, as indicated in Figs. 1 and 5, to prevent disengagement of the bars 16 from the rung. lVhen the latch bar has been swung up, as indicated, the clip 21 is swung over the free end of the bar, to hold it in place. The arrangement of the notches 20 of the latch bar is such that when the latch bar is in place and locked, a circular opening appears at each of the recesses. That is the notches in the latch bar are com lementary to those portions. of the note ms 17 which are not covered by the latch bar.

A sectional brace is provided for supporting the outer end of the bars 16, the brace consisting of telescoping sections. The outer section 22 of the said brace is tubular, and one end is closed and extended radially to form a head 23. The'inner section 24 is cylindrical and may be tubular if desired, and the said section. fits within the outer section. The section 24 is provided with a longitudinal series of spaced diametrical openings 25, which are adapted to register with a single diametrical opening in the outer section, for receiving a cross bolt 26 to hold the sections in adjusted position. The outer section of the brace is pivoted to the bars 16 in a manner to be described by means of a cross bolt 27 A cross head is connected to the outer end of the inner section, the said cross head comprising a plate curved transversely in a reverse or line-of-beauty curve. The plate has an internally threaded socket 28, and substantially triangular extension braces'29 are arranged between the socket and the body ofthe plate. It will be noticed that the plate consists of portions 30 and 30 oppositely curved, and the said portions are adapted to engage a rung, as indicated in Figs. 1, 2 and 5, to support the bars 16 in horizontal position. The inner section 24 has a threaded stem 31 for engaging the socket 28 of the cross head, and has also an annular radial rib 32 at the inner end of the threaded portion for engaging the end of the socket 28 to limit the inward movement of the stem with respect to the socket. The belt 27 before mentioned passes through openings in the ribs of the bars 16,

braces 33.

and through a diametrical opening in the outer section 22 of the brace.

Inclined braces 33 are arranged between the bolt 27 and the bolt 26. Each of the saidbraces has its ends bent angularly, as shown more particularly in Fig. 2, the portions at one end having openings for receiving the bolt 26. This bolt is passed through the said ends and through the sections 22 and 24 and is'en'gaged by a nut 34 for connecting the inclined braces to the sectional brace and for holding the sections of the brace in adjusted position. The opposite ends of the braces 33 have openings for receiving the bolt 27, and sleeves 35 are arranged on the bolt between the outer section 22 of the brace and the ends of the Nuts 36 are arranged on the cross bolt between the inclined braces 33 and the ribs of the bars 16, and other nuts 37 are arranged with the outer ends of the cross bolt, for holding the parts in adjusted position, and it will be evident that the in clined braces 33 prevent angular movement of the cross'bolt 27 with respect to the sectional brace.

. In use, the improved bracket may be arranged as shown in Figs. 1 and 2, or as shown in Fig. 5. That is the brace may be arranged on the outer side or front of the ladder, or on the inner side or in rear of the ladder. Both bars 16 are engaged with one rung of the ladder, by seating the rung in registering recesses 17 of the bars. The

latch bars 18 are then swung up beneath the rung and are held in this position by the clips 21, thus clamping the bars to the rung. The sectional brace may be arranged above or below the bars 16. When the brace is arranged below the'bars the curved portion 30 of the cross head is engaged with the rung, while when the brace is arranged above the bars 16 the portion 30 of the cross head is engaged with the rung. In one case the sectional brace suspends the bars 16, while in the other case the brace acts as a strut.

The scaflold indicated at 38 is arranged on the upper faces of the bars 16, that is the scafi'old rests upon the bodies of the bars. The arrangement of the cross heads provides for its engagement with practically the entire length of the rung. This arrangement in connection with the brace 33 absolutely prevents any lateral wabbling of the sectional brace.

It will be evident from the description that the improved bracket is easily connected to a ladder or detached therefrom, and that the manner of connecting the bars 16 with the ladder absolutely prevents disengagement of the said bars from the ladder.

In the embodiment of the invention shown in Figs. 7 and 8, the sectional brace is composed of inner and outer sections 39 and 40. The outer end of the inner section 39 is engaged within the socket 42 of the cross head 43, while the outer section has the head 41 at the end remote from the inner section. The cross bolt 44 is arranged transversely of the outer section adjacent to the head, and the inclined braces 45 are arranged between the ends of the cross bolt and the outersection. Each of the said braces has one end provided with an opening for receiving the cross bolt, and the other end is provided with an opening for receiving the bolt 46 which holds the sections in adjusted position. The cross bolt is connected to the bars 16 in the same manner as described for the bolt 27. In the construction of brace shown in Fig. 5 it is necessary to remove the bolt 26 in order to adjust the section. In the construction shown in Figs. 7 and 8 this operation is not necessary. The sections may be moved angularly with respect to each other to engage and release the holding means for the section. The said means is the bolt 46 which is passed through registering openings in the outer section 40 and through registering slots 49 in the inner section, the said slots extending longitudinally of the inner section. One wall of each slot 49 is provided with notches 50, the said notches being designed for engagement by the bolt 46. When the bolt 46 is turned to register with the slots 49 it may be moved longitudinally of the inner section of the slots. If, however, the bolt is turned angularly to engage one of the notches 50 of each series, it is evident that the sections will be locked from movement with respect to each other. The bolt 46 is engaged by a nut 47, and a cotter pin 48 is passed one end with the adjusting bolt and at the other end With the supporting bolt.

DAVID R. LUCAS. Witnesses:

O. P. BLUE, 0- A. BLUE.

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