US1735992A - Ladder - Google Patents

Description

Nov. 19, 1929. P. J. BODE 1,735,992

LADDER Filed Jan. 26, 1928 2 Sheets-Sheet l 2 m4 flaw P. J. BODE Nov. 19, 1929.

LADDER Filed Jan; 26, 1928 2 Sheets-Sheet 2 Patented Nov. 19, 1929 PATENT-"OFFICE PETER J. Bonner ST. Louis, MISSOURI LADDER Application filed.- January 26, 1929:. Serial in); 249,511.

The object of my device is to make a ladder which embodies a great many safety elements.

In the use of theconventional ladderthe stability of the person on the ladder is too uncertain, particularly'where such person is required to perform different tasks such as painting or repairing, plumbing, or washing windows or cleaning generally. A further object of my device is to devise a ladder which positively and firmly supports the platform on which the operator stands, one that is ad justable in height, one that may be easily moved from one position to another, and one which provides means for supporting a bucket or other tools in a convenlent position relative the operator. A further object is to make a ladder which is simple in construction,

that is, made of.parts that lend themselves readily to multiple production and which may be easily assembled.

With these and other objects in view, my invention has relation to certain novel features of construction and arrangement of parts as will be hereinafter more fully described, pointed out in the claim, and illustrated in the drawing in which,

Fig. 1 is a front elevation of my device.

Fig. 2 is a side elevation of my device.

Fig. 3 is a cross sectional plan view taken 011 the line 3-3 of Fig. 2.

Fig. 4 is a fragmental section of an arm used in my construction showing its selective I attachment to a telescopic rod used in my construction.

Fig. 5 is an enlarged fragmental elevation of a portion of the telescopic rod usedin my device together with means of selectively securing it to the arms used in'my device.

Numeral 6 designates a ladder of the con ventional type having the treads 7. Numeral 8 designates a second ladder of the conventional type having the treads 9. Numeral 1O designates a platform to which the ladders 6 and 8 are secured by means of the angle irons 11, which are secured to the lower side of the platform 10 and the bolts 12, passing through the upper end of the rails of the ladders and through holes in the angle irons 11.

The structure thus far described illustrates 59 what may be termed a double ladder. Ac-

in; The bolt 18'passes through the perforacess to the platform 10 be obtained by means of either of the ladders. Numeral 13 designates an auxiliary leg whichis pivotally secured to the lower'lateral side of the platform 10 in a central position. The securing means consists of a metallic element 14 se. cured to .the'top of the auxiliary leg 13 and having the perforation 15 formed therein. This metallic element l is positioned betweentwo elements 16 having holes 17 formed there,-

tion 15 of the metallic element 14, as well as through the holes 17 in the elements 16. A. similar auxiliary foot 19 is secured in the'same manner to the opposite side of the platform 10. Casters 20 are secured at the bottom of v the auxiliary legs 13 and 19as'well as to the feet of the ladders 6 and8. In order to make the auxiliary legs 13 and 19 extensible so that the height of these feet may be varied, each foot is made as follows,that is to say, each leg'is made of two rails 21 and 22, which are rotatively secured at the top as previously-indicated. Numeral 23 designates an inde pendent element to which the caster 20 is secured. The independent element 23 is of such size and shape, preferably rectangular in section, as to premit it s being slid longitudinally between the ends of the rails 21 and 22'. The rails '21 and 22 are'perforated at regular intervalsas indicated by numeral 24 and the independent element 23 is similarly perforated as indicated at 25. Theholes in a the rails 21 and 22 and in the independent element 23 are similarly spaced. Numeral 26 I designates a pin or bolt as does numeral 27 3 which passesthrough two opposite perfora tions in the rails 21 and 22 and through a perforation inthe independent element '23... Bymeans'ofthe pins andbolts 26 and 27'the independentelement 23 may be placed in a selective position relative the rails 21 and 22. It is obvious that the lateral stability of the ladder is made positive by means of the auxiliary- legs 13 and 19. In order to selectively limit the rotation or oscillation of the auxiliary legs 13 ands19 relative the'platform 10,1.

the telescopic rod 28 is provided which is ro to the auxiliary leg 13. The securing means is of the conventional type, namely, a pin 29 passes through opposite perforations in the rails, 21 and 22 and through a perforation 30 at the end of the telescopic rod. In order to selectively limit the length of the telescopic rod 28, the' rod is perforated in both the male and female portions permitting the insertion of a pin or bolt through oneof the perforations in the male and femaleportion. It will be seenthat when the length ofthe telescopicrod 28 is fixed that the relative; lateral position of the auxiliary legs 13 and" 19 is established. In order toselectively. es,- tablish the position of the ladders 6'and 8, the arms. 31 are provided. There are two of'suoh arms, each arm being rotatively so.

cured to one of the ladders such as 6 in the same horizontal plane as the telescopic rod 28. This rotating securing means consists of v a pin ol bolt 32 passing through one rail ofthe ladder 6 and through a perforation in V 4 the arm 31. i The oppositeend'of thearm 31' is notched as shown at 33. Numeral 34 designates a bolt having the fly nut 35.

arm 31 may be selectively placed in position byengaging a notch 33 over the bolt 34. A notch33 formed in the arm 31 also engages the telescopic rod 28 when in the position of ;;ladders 6' and 8. At one end of the support 36 isformed the hook 37 by means of which the support 36 can be hooked on to any tread of the ladder 6, causing the support 36 to lie in a horizontal planeand be supported by the tread of theladder- 6 and likewise by the corresponding/tread of the ladder 8. The support 36 is of suchlength that the end opposite the hook 37 will project consider.- ably beyond the ladder 8. This is for the purpose of offering a support for a bucket "or other tool.; In order to offer a manual 7 support for the operator working on the plat- 7 form 10,, two rails 38 are provided as shown.

' in Figs. land 2. These'rails when inposition re. uppor e nah rlz n al lane a t The I hand height above the platform 10. supporting is accomplished by means'of. the supports 39 near the ends of which are rota- I tivelysecured the rails 38. In order to perl mit the raising and lowering of the rails38 and hence the supports 39, the supports39 are secured in sliding engagement inthe hol- 7 low cylinders 40 formed on the platform 10. v

In order to secure the supports39 in a definite selectiveposition, bolts or pins 41 are provided which pass through-holes in the hollow cylinders 40 and through holes in the sup-. ports 39. Such a hole is indicated in Fig.2 by thenumeral 4:2. It will be seen that the operator havingthe rails '38 as supports is The to said platform, a telescopic rod rails 3.8.. If it is, desirable for theoperator tov reach higher than is possible in standing on the platform 10, the height of the ladder may be'increased by supporting the support '36 on top of the rails' 38 as indicated in Fig. 1.

In order to prevent the support 36 from sliding' 'olf laterally, the cleats 45 are secured to the suppolft- 36-.

that'when my'ladder is not It will be" seen in use it may be folded considerably so as V to'occupy small a space as possible, The. arms 31may be disengaged from the bolts 3a and the ladders '8, and 6, be brought to. a

parallel position. Thetelescopic rod 28may: be telescoped until the. auxiliary feet 13. and

19 are brought to a state of parallelism. The

supports 39 may beslid downwardly into the position. shown in Fig, '2, i

What I claim and meanv to ters Patent isr. s 1

In combination with. a platform, ladders pivotally secured thereto, means for 'selectiv'ely holding saidladdersin selectivespaced relationship, auxiliary legs pivotally secured. securingsaidauXi-liary le s together.

In testimony whereof I aifix my signature. i PETE J." BODE,

secure Let-.

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