US1162261A - Ladder. - Google Patents

Description

- Patented Nov. 30, 1915.

3 SHEETS-SHEET l.

C. F. SPAID.

LADDER.

APPLICATION FILED 050.19. 1914.

C. F. SPAID.

LADDER. APPLICATION FILED DEC. 19. m4.

Patented Nov. 30, 1915.

3 SHEETS-SHEET 2.

C. F. SPAID.

LADDER. APPLICATION FILED DEC. 19. 1914.

1 ,162,261 Patented Nov. 30, 1915.

3 SHEETS-SHEET 3.

Lfifim CHARLES E. SPAID, OF LEI-IEW, WEST VIRGINIA.

LADDER.

Specification of Letters Patent.

Patented Nov. 30, 1915.

Application filed December 19, 1914. Serial No. 878,099.

. To all whom it may concern Be it known that I, CHARLES F. SPAID, a

citizen of the United States, residing at Le-' may be readily moved from place to place, a .matter of lmportance in an orchardwhere the ladder must be moved a considerable distance during the course of a days work.

Theinvention consists in the novel features of construction hereinafter described, pointed out in the claims and shown in the accompanying drawings in which:

Figure 1 is a side elevation. Fig. 2 is an end view, the parts being in the same posi: tion as in Fig. 1. Fig. 3 is a si de elevation, the ladder being extended to its greatest extent. Fig. 4c is a detail inside view, partly in section, of the upper portion of a stationary frame, a portion of a vertically movable frame being shown in its guideway. Fig. 5 is a side elevation showing the parts in position to form a supporting platform. Fig. 6 is a section on the line 6-6 of Fig. 1.

In constructing the ladder I employ a frame stationary when the ladder is in use but re'adilymovable from place to place, said frame having upwardly converging side members 1 connected and braced by cross strips 2, andspaced uprights 2 and opposite sides of the ladder frame are connected by transverse end members 3. This supporting frame is mounted on wheels 4.

Hinged to the lower end portions of the frame are ladder sections 5, said sections being hinged at their lower ends and their side pieces being longitudinally slotted adjacent their upper ends as at 6, and notches 7 communicate with these slots, and the slots, as shown, are preferably open at their upper ends, to permit an adjustment to be hereafter described.

A vertically arranged frame 8 works in a suitable guideway formed by the space between the uprights 2 and hinged to the frame 8 are ladder sections 9 which rest respectively on the sloping ends of the supporting frame, having at their lower ends transverse rods 10 that engage the slots 6.

The ladder sections 9 areduplicates, each being pivotally connected at its inner end to the upper portion of the frame 8 but below the top of said frame have their side members notched as at 11. These notches are adapted to be engaged by locking bails 12, which are pivotally mounted, as at 13in one ofthe cross bars '2. On one side these bails are angled and extended engaging an L- shaped plate 14L which is secured to a bar 15 supported by a spring 16 and provided with a foot lever or treadle 17, which when depressed moves the bar 15 downwardly, and

by rocking the plate 1 1 rocks the bails 12 and disengages them from the notches. A cable winding shaft 18 is carried by the members 2 of the supporting frame and is provided with a ratchet 19, pawl 20 and handle 21. Cables 22 wind on said shaft and run over pulleys 23 carried by one upright 2 on each. side and said cable are detachably connected to the lower portion j of the frame 8, which is raised by winding said cables on the shaft.

A second set of pulleys 2 1 are carried by the upper portion of the frame 8 and suitable cables may run over these pulleys and be connected to either of the rods 10 when it is desired to raise one of the ladder sections 9 as indicated in Fig. 3.

A short ladder section 25 is pivotally connected to the upper part of the frame 8 and. this section carries two slidable cross bars connected together adjacent their ends 26 which may be moved downwardly so that end portions overlap the upper portion of the frame 8, thus locking the section 25 in upright position, as in Figs. 1 and. 2, or said section can be swung downwardly as in dotted lines in Fig. 1.

The plate 14 is preferably of spring material and is not connected to the side members 2 of the frame. It is pressed toward said members by a turn button 27, and by shifting said button is permitted to spring out, thus releasing the bails 12, and permitting their removal. The rods 10 may also be slipped out of place, thereby entirely detaching the sections 9 from the bails and ladder sections 5.

When the parts are swung into the position shown in Fig. 5 with the rods 10 in the notches 7 and the outer end of the sections 9 will be supported by the sections 5 which may be swung into an upright position, and by adjusting the frame 8 so that the inner ends of the ladder sections 9 will be in the same plane as the supported outer ends a board may be laid on the sections 9, converting the ladder into a platform.

It is obvious that the ladder is capable of many adjustments and various uses.

What I claim is:

1. A ladder having a normally stationary frame with upwardly converging sides, a vertically movable frame carried thereby, ladder sections hinged respectively at their lower ends to end portions of the stationary frame, and cooperating ladder sections hinged to the vertically movable frame.

2. A ladder comprising a supporting frame having converging end members, a vertically movable frame carried centrally by the supporting frame, ladder sections hinged to the ends of the supporting frame, ladder sections hinged to and working on opposite sides of the vertical frame, means carried by said last mentioned sections for engaging the first mentioned sections, and means for elevating the vertical frame.

3. A ladder comprising a supporting frame, the end members of said frame converging upwardly, a vertically movable .frame carried by the supporting frame mid- Way its ends, ladder sections hinged to the vertical frame, and adapted to fold down on wheeled frame having converging end portions, a vertically movable frame carried by the supporting frame, means for raising and lowering said frame, ladder sections hinged thereto and on opposite sides thereof, and adapted to be brought into alinement in either a horizontal or an inclined plane or to extend at an acute angle to each other A means for locking the said parts in position, foot operated means for releasing said parts, a hinged extension for the vertical frame, and ladder sections hinged at their lower ends to the end portions of the supporting, frame, respectively, and adapted to engage and cooperate with the sections hinged to the vertical frame.

CHARLES F. SPAID.

Witnesses:

HATTIE V. EATON, GEO. W. MORELAND.

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

Washington, I). C. l

Images