US2383962A - Extension stepladder - Google Patents

Description

Sept. 4, 1945. l J. H @LOWER 2,383,962

EXTENS ION STEPLADDER www GUM/WMA sept. 4, 1945. J H, GLOWER Y 2,383,962

EXTENS ION STEPLADDER Filed May 3, 1944 2 Sheets-Sheet 2 z 575 f4 v z/ 3f' 3 Jaim Hazowf mmf-M4 W Patented Sept. 4, 1945 y UNITED.; STATES f l PATENT g oFFl-CE '4 I', u. LV2-.,383962, I A- s l I n g. n EXTENSION s'rErLADDER I, John III. Glower, Chicagmvlll. v

Application May 3, 1944, SerialNo.-533,`9'62 s'olaims. `(o1. 22S-21') Figure 3 is a horizontal sectional view taken on the line 3 3 of Figure 2;

Figure 4 is a horizontal sectional View taken on the line 4--4 of Figure 2;

Figure 5 is a vertical sectional View taken on the line 5--5 of'Figure 2;

Figure 6 is a View in central vertical section with the extension in adjusted position; and

Figure 7 is a cross sectional View taken on the line 1 1 of Figure 6.

Referring specically to the drawings, thestepladder has a step section as at I comprising side members or stiles II bridged by a top'step I2 and a series of narrower steps I3, beneath the same, rods or bolts I4, preferably of metal, being used to connect the stiles II, and to engage directly against the lower surfaces of the steps I3 to reinforce the same.

L-shapedv brackets I are suitably bolted or otherwise rigidly fastened as at I6 against the under surface of the top step I2 and therethrough V-shaped openings I'I are provided. Said stiles II are rigidly connected to the brackets I5 by bolts I8, which bolts serve to rigidly connect bars I9 against the outer sides of the stiles, which bars are provided with V- shaped slots in transverse registry with the slots I1.

A pair of legs 20 are connected together by one or more rungs 2l, and the upper ends of the legs have bolts 22 passing therethrough which pivotally and slidably connect the legs in the slots I'I, the upper ends of the legs being disposed between the brackets I5 and plates I9.

Between the legs and step section I0, a suitable means is provided to limit relative movement so that the device as thus far described may effectively serve as a stepladder. Such means comprises four links 23 all pivotally connected by a bolt 24 to a roller or tube 25, and being individually pivoted as at 26 to adjacent stiles II and legs 20.

Secured against the inner surfaces of the legs 20 and projecting rearwardly beyond the legs, are bars 24, bolts 25, or the equivalent being used to secure them to the legs. Such bars each has a longitudinal s1ot,26 provided with a series of lateral branches 21 terminating in portions 28 parallel with the slots 26.

An extension section 29 consists of two side bars 30 adapted `to slide on the rearsurfaces of the legs 20 and overlap the outer sides oi the bars 24, such bars 30 being connected by a series of cross elements 3l which may be rungs so as to permit climbing thereon. Said extension 29 also has a transverse rod 32 which is adapted to travel in the slots 26 and into any selected branches 21, so that the extension may be positioned at various adjustments below the lower ends of the legs 20, thus enabling support of the legs and of the step section at dierent elevations, as on steps or otherwise.

To more securely hold the extension against displacement in its different adjusted positions,

hooks or other fastenings 33 are pivoted at 34 to the legs and are engageable with eyelets 35 secured to the bars 30 at various locations.

The adjustment of the upper ends of the legs 2D, by means of the bolts 22 and slots Il, enable the legs to be positioned at different distances from the step section Ii), as preferred, according to whether the device is used as an ordinary step-s ladder or with the extension.

Various changes may be resorted to provided they fall within the spirit and scope of the invention.

I claim as my invention:

l. A device of the class described comprising a'step section, legs pivoted to said section, bars secured to said legs having slots provided with branches, an extension section, and said extension section having a rod extending across the same and movable in said slots and branches to position and secure the extensio-n in adjusted positions.

2. A device of the class described comp-rising a step section, legs pivoted t0 said section,bars secured to said legs having slots provided with branches, an extension section, said extension section having a rod extending across the same and movable in said slots and branches to position and secure the extension in adjusted positions, and fastenings to secure the extension to the legs against accidental displacement.

3. A device of the class described comprising a step section, legs pivoted to said section, bars on the inner surfaces of said legs extending beyond their rear surfaces, said bars having slots and branches therethrough beyond said rear surfaces, anextension section having bars in the rear of the legs and on the outer sides of the rst mentioned bars, a rod joining the second mentioned bars, said rod being movable in said slots to position the extension at different adjustments.

4. A device of the class described comprising a step section, legs'pivoted to said section1 bars on the inner surfaces of said legs extendingbeyond and fastenings to secure the extension to the legs against displacement. y

5. A device of the class described comprising a step section, legs pivoted to said section, bars on 5 the inner surfaces of said-legs extending beyond their rear surfaces, said bars having slots and Y branches therethrough beyond said rear surfacesi' 1' an extension section having bars in,thereargov the legs and on the outer sides of thevrst "menf tioned bars, a rod joining the secondmentionedbars, said rod being movable infsaid-slotsto e position the extension at diffrent adjustments,

"and bracket meanssecuring the legs to the step j section having V-shaped slots, and said legs having securing elements pvotally and slidably er 1 JOHN H. GLOWER.'

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