US1557278A - Ladder jack - Google Patents

Description

` ot.1a,1925. 1,551,278

S. C. TUSSING LADDER JAC K Filed Dec. 26.v 1924 l i" $l7 l Gimme@ Patented Gct. 13, 1925.

UNITED STATES 'SAMUEL C. TUSSING, OF AFINDLY, OHIO.

` LADDER JACK.

Application filed December 26, 1924. Serial No. 758,204.

To all 'io/wm t may cou-cervi.'

Be it known that I, SAMUEL C. TUssiNc, a citizen of the United States, residing at Findlay, in the county of Hancock and State of Ohio, have invented a new and useful Ladder Jack, of which the following is a specification. if

This invention relates to a ladder attachment, and aims to provide a removable platform which may bey readily and easily secured to a ladder to support the weight of workmen eliminating the necessity of the workmen standing on a rung of the ladder'.

An object of the invention is to provide a device of this character which, when out of use may be folded into a small and compact article to facilitate transportation thereof.

Another important object of the invention is to provide means to insure against the supporting arms of the platform becoming disconnected while in use, the holding means being such as to permit of adjustment of the supporting arm, adapting the device for use in connection with ladders of various widths.

A still further object of the invention 'is to provide means whereby a board may be supported on the platform against movement should it be necessary to use the platform as a support for scaffolding.

lVith the foregoing' and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangen'ientof parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, may be made within the scope of what is claimed, without departing from the spirit of the invention.

Referring to the drawing:

Figure 1 is a side elevational view of a platform constructed in accordance with the invention and positioned on a ladder.

Figure 2 is a front elevational view thereof.

Figure 3 is a sectional view taken on line 3--3 of Figure 1.

Figure 4 is a perspective view of the block or adjustable arm holding member.

Referring to the drawing in detail, the reference character 5 indicates the side bars of ladder construction which are connected by mean-s of the rungs 6,

The device forming the essence of the present invention embodies Lpairs of spaced arms 7 that are arranged on opposite sides'- of the bars 8 and have pivotal connection with the bars 8 at 9, the bars 8 being of the angle type and as shown have their inner ends formed intohook portions 10.

The opposite ends of the bars 8 extend upwardly as at 11 and are of lengths to terminate appreciable distances above the platform 12 that connects the members 8, it being understood that two of these sections embodying the members 8, are employed in the platform construction. From the foregoing it will be obvious that should it be desired to use two or more of these platforms as supports for boards employed in scaffolding, the boards will be retained in position against movement with respect to the platforms.

`its clearly illustrated by Figure 1 of the drawing, the arms 7 of each supporting section of the platform have pivotal connection with the elongated member 13, through the medium of t-he angle plates 111. An angle plate 15 is secured to one end of member 13 and is designed to embrace portions of the bar 5 associated therewith, to insure against lateral movement of the platform when it has been positioned for use.

The opposite end of the member 13 extends beyond the opposite bar 5 of the ladder so that the devicemay be eiiiciently employed with ladders of various widths. Pins extend through arms and are designed to move in the notches 17 arranged in spaced relation with each other and disposed in one edge of the pivoted adjusting bar 18, associated therewith to hold the bar 18-against moven'ient when an adjustment thereof has been made.

1n order that pressure will be exerted on the bars 18, the arms 7 disposed adjacent to the bars 18, act as supports for the pressure blocks 19 which are formed with cut out portions 2O to fit over the arms 7 in such a way as to allow of sliding movement of the blocks 19 between the arms 7.

A spring member associated at 21 is wrapped around each pin 16 and has its ends curved to lit over the pins 22 carried by the pressure block 19 associated therewith so that under normal conditions, the blocks 19 will exert a pressure on the pins 16 associated therewith and hold the pins into close engagement with the walls of the notches in which they are positioned. Vhen it is desired to make an adjustment of the bars 18, it is obvious that b v exerting an upward pressure on the ,bars 18, the bars will be moved away from the pins 16 against the tensions of the springs 21, and that when the adjustment has been made, the pins 16 will snap into the proper' notches of the bars 18.

IVhile I have shown and described the bars 1S as provided with notches disposed along one edge thereof, it is pointed out that I contemplate the useV 'of bars such as shown at 18, as provided with openings ttor the reception of the pins 16 without depart-ing from the spirit of the invention.

I claim 1. In a device ot the character described, a pair of bars having hooks formed at one of their respective ends, a pair ot' spaced arms having pivotal connection with each otl the bars, bars formed with notches and having pivotal connection with the first mentioned bars, and extending between the arms ot each pair,v a pressure block slidably ymounted between each pair of arms, a

resilient means carried by the pressure block Lt'or holding the pin in engagement with the notched bar.

2. In a device of the character described, a pair ot bars, means for securing the bars to a ladder, arms having pivotal connection with the bars at their outer ends, notched bars having pivotal connection with the first mentioned bars, pressure blocks slidably mounted on the arms, pins extending :from the pressure blocks, spring members having their free ends looped around the pins, pins supported by the spring members and adapted to be moved into the notches, of the arms, and an elongated ladder engaging member having connection with the arms.

In testimony that I claim the foregoing as my own, I have hereto affixed my signature.

SAMUEL C. TUSSING.

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