US1452182A - Platform ladder jack - Google Patents

Description

. APF., 'm w23 C. A. BLW-RUM PLATFORM LADDER JACK 2 Sheets-Sheet l Filed Sept. 28 1920 lPatented' pr. E?, i323@ UNIT STA-TES cinnamon n. airframe, ornement sas.

ILTFGRM LADDER, JACK.

Application tiled September 28, 1920. Serial No. 413,283.

To all whom it may concern.'

Be it known thatI, CLARENCE A. BUTRUM, a citizen of the United States, residing at Holton, in the county of Jackson and State of Kansas, have invented certain new vandl useful Improvements in a Platform La dder Jack, of which the following is a speclication.

This invention relates to platform ladder jacks and more particularly to an apparatus lfor forming a bracket for a scaffolding or providing be utilized workmen.

One of the objects of the invention is to provide a simple attachment which may be connected with the rungs of a ladder so that portions of the device will be disposed in a horizontal Yplane whereby the platform will be provided upon which the Workmen may stand. f Another object of the invention is' to provide a device of this character which may be adjusted to `tit the angular position of the ladder or which may be utilized on ladders of different constructions.

Other objects of the invention will appear upon consideration of the following detailed description and accompanying drawings, wherein f Figure 1 is a .side elevation of the apparatusconstructed in accordance with my ina means whereby 'a ladder may as a support for a platform for -vention,

.Figure 2 is a front elevation, and

Figure 3 is a fragmentary view of the connecting member for the platform to the'suport. p `Referring. to the drawing by numerals, the side rails 1 and 2 of the ladder are provided with the usual rungs 3 spaced apart the required distance.. When the ladder is in use itswill be in the angular position indicated in Fig- 1. A shelf or platform 4 is provided at one end with cleats 5 and 6 which are suitably s aced apart to receive one of the rungs of t e ladder as shown to advantage in Fig.` 1. Attached to the bottom of the shelf are the cleats 8 which are provided with sleeves 7 and a hinge rod 9 is passed through the sleeves and is provided with detachable elbows 10 to which. sections of pipes 11 are detachably connected. These sections of pipe serve as portions of the adjustable `a ladder having cross rungs,

standards l2 which also include the sliding rods 13 which telescope thepipe sections 11 whereby the standards may be longitudinally adjusted -to anydesired length. Openings are provided in the'rods 13 and are adapted to register with openings in the sections 11 whereby cotter pins 14 may be employed to lock the two sections together. It will be seen from this construction that the portions 13 serve as extensions which may be lengthcned or shortened as desired whereby the platform 4 may be held in a horizontal plane. The lower end of each member 13 is provided with an 'S-shaped hook 16 one portioil of which is adapted to receive a rung of the ladder when the device is inthe full line posi- `tion shown in Fig. 1'. rIhe dotted line posi'- tion as' indicated .in Fig. 1 shows .how the apparatus may be utilized when the platform 4 is to be used to support a scaffolding or other platform upon which the workmen may stand While working.

Minor changes may be made in the details of construction Without spirit of the invention or the scope of the claim hereunto appended.

at is claimed is AIn a ladder platform, the combination with of a platform having removable spaced cleats at one end to receive one of the rungs, said platform being provided with bearing sleeves at the opposite end of the platform and having a hinge pin extending through said sleeves', elbows detachably connected with the ends of said pin, telescopic members detachably connected with the elbows and extending at right angles to said hinge pin, said telescopic members each comprising an extension sleeve and a rod, said `sleeve and rod in each telescopic member having openings adapted to register with each other, means for locking the extension sleeves and rods in an adjusted position, and S-shaped hooks formed mtegral on the free end of each of the telescopie members to engage the rungs of the ladder. v

In testimony whereof, I have aiixed my signature in the presence of two witnesses.

IDA Jaoos, N om. E. Barna.

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