US860065A - Store-service extension-ladder. - Google Patents

Description

No. 860,065. PATENTED JULY 16, 1907.

P.E.SO0TT. STORE SERVICE EXTENSION LADDER.

APPLICATION TILED JUNE 16,1906.

2 SHEETS-SHEET 1.

INVENTOR,

lATTORA EY,

'BYWMW'.

UNITED STATES PATE T OFFICE.

' j FRANCIS E. sooTT, OF CENTERVILLE, INDIANA.

STORE-SERVICE EXTENSlZON-LADDER.

Specification of Letters Patent.

Patented July 16, 1907.

Application filed June 16,1906. Serial No. 322,106.

Extension-Ladders, of which the following is a full,

clear, and accurate exposition and specification, being such as will enable others skilled in the art to which it appertains to make and use the same with absolute exactitude.

My present invention has particular reference to store service extension ladders, and the invention consists in the various parts and their relations to each other, and the operation and the adaptabilitypf the ladder in its several interrelated elements, and with the elements in connection with which it is intended to be employed.

The object of my invention, broadly speaking, is the provision of a step ladder to be used, primarily, in connection with shelving in stores or the like, to provide a ladder which will be neat and attractive in appearance, strong and durable in construction, easily operated and controlled, quickly and easily installed in position, which will not mar the store furniture, which will occupy but a minimum of space when in operative position, and which will give a maximum of efficiency in practice.

A more particularobject is the provision of a store service extension step ladder mounted on carrying wheels to travel on the floor of the room and on the base-shelf of the store shelving; requiring for its successful operation but a single track disposed along the surface of the base shelf to guide it in its lateral movements; means for causing its movements to be practically noiseless; means whereby it may be extenuated to attain the highest shelf; means whereby the ladder will not obstruct the view or interfere with obtaining free access to the shelving; and providing means whereby goods may be piled on the ladder, either in placing or removing goods from the shelves, and by which goods may be moved from place to place within the limits of the base shelf.

Other objects and particular advantages will appear in the accompanying drawings forming a part of this specification, and they will be pointed out in the following specification.

Probably the best exemplification of my invention is shown in the accompanying two-sheets of drawings, in'which- Figure 1 shows a side-elevation of my ladder extenuated and in operative position in connection with the floor, the base shelf, andthe shelving; Fig. 2 is a front elevation of my invention unextended; Fig; 3 is a side elevation of my invention unextended; Fig. 4 is a horizontal cross sectional view of my invention, as taken on the line X-X of Fig. 2; Fig. 5 is a detail perspective view of the inside face of one of the sides; and Fig.

6 is a'plan view of the top.

Similar indices denote like parts throughout the several views of the drawings.

In order that my invention may be more fully understood and its many advantages adequatelycomprehended I will now take up the detail description I thereof and will describe the various parts and their intended operations as briefly and as comprehensively as I may.

In the drawings the letter A denotes the floor line, while the letter B designates the base shelf, and the letter C denotes the shelving rising above the base, which parts are illustrated merely that I may show the application of my invention with reference thereto.

The body of my invention contemplates the two identical side members or standards 1 and 2, which are disposed at a predetermined angle approximately as shown in Figs. 1 and 3, and they should be of lengths somewhat greater than is the height of the base shelf B from the floor A.

The members 1 and 2 are spaced apart and are connected by a plurality of steps, as for instance the steps 3, 4 and 5. Formed in the lower ends of the respective standards 1 and 2 are open vertical slots 6 and 7, in which are mounted the floor-wheels 8 and 9, respectively. Said wheels being revolubly mounted on their respective axles 10 and 11, which axles also contribute to preventing the lower ends of the standards from spreading, The peripheries of the wheels 8 and 9 are formed concave in which are held resiliently the rub ber tires 12 and. 13, respectively, which tires are to travel over the floor A.

The numerals 14 and 15 designate brackets, each comprising a relatively long central portion having a downwardly extending prong disposed at an angle cor responding to the angular inclination of the standards, and two downwardly extending fingers, the purposes of which will presently appear. Said brackets are secured to the outer faces and at the upper ends of the respective standards 1 and 2 by screws or the like as, for instance the screws l617 and 1819, respectively. Between the fingers of the respective brackets are revolubly mounted the channel wheels 20 and 21, respectively, each being mounted on its respective axle 22 and 23. The height of the brackets 14 and 15 is such that the wheels 20 and 2]. will stand vertical and resting on the surface of the base B and near the shelving 0, as indicated. Secured on the surface of the base B, at all points equidistant from the front edge of the base, is a half-round track 24 which the channels of the wheels 20 and 21 are adapted to fit and on which they travel when the ladder is moved laterally.

Secured to the rear edges of the standards 1 and 2 and extending from end-to-end thereof are strips projecting inward forming the respective tongues 25 and 26, for the purposes presently appearing.

The numerals 27 and 2S designate the two identicaf side members or standards of the extension section 01 my ladder, said standards are spaced apart the same distance as are the standards and 2, and are connected by a plurality of steps 29, 30 and 31, and by the top step 32, which latter is secured across the upper ends of the standards 27 and 28 and project at each end thereover as shown. To the front faces of the stand ards 27 and 28, extending from end-toend thereof, are the channel guides 33 and 34, which are L-shaped in cross section, with their channeled portions extending inwards and facing outwards, being oppositely disposed, with their channels such as to neatly receive the inner projections of the respective tongues 25 and 26, as shown in Fig. 4.

From the above it will be apparent that the movable section of my ladder is mounted to slide parallel in contact with the body section, and when closed the ends of the step 32 rests on the central portion of the brackets 14 and 15, as shown in Fig. 3, or this movable section maybe moved upwardly and entirely removed, and with means, presently stated whereby it may be supported at the desired point, for instance, as shown in Fig. 1..

Secured across the upper ends of the members 1 and 2 is a top step 35 corresponding and adapted to join with the step 32, notches a and I) being cut into the rear edge of the step 35 to' allow the guides 33 and 34, respectively, to pass therethrough when the movable section is raised. And secured to the brackets 14 and 15, extending from the shelf 32 to the rear ends of said brackets, is the shell 36, corresponding in length with the steps 32 and 35, the shelf 36 and the steps 32 and 35 together form a comparatively spacious plat-form, as shown in Figs. 3 and 6.

Pivoted in and between the upper ends of the standards l. and 2 is the shaft 37, having secured thereto near each end thereof the pawls 38 and 39 whose points are adapted to travel in contact with the forward exposed faces of the guides 33 and 34, they being retained normally in contact therewith, inclining upwards, by the spring 40, which latter is secured to the underside of the step 35. Formed in said forward exposed faces of the guides 33 and 34 are notches, as the notches 41, 42 and 43 in the former and the notches 44, 45 and 46 in the latter. It will now be noticed that as the movable section is raised up the pawls will engage in said notches and support the movable section at the desired height, the disposition of said notches being such that the pawls are adapted. to be engaged therein at points whereby the movable section will be secured at points whereby its steps will be located on a level with the steps of the body section, as is clearly indicated in the drawings.

Secured in the center of the shaft 37 and projecting nel wheels 20 and 21, the shelf 36, and the brackets 14 and 15, it is apparent that I then have an ordinary extension ladder, which may be found desirable under some circumstances.

While I have shown and described a specific construction for my ladder I desire to have it understood that various changes and modifications may be made therein without departing from the spirit or sacrificing any of the advantages thereof.

Having now fully shown and described my invention and the best means for its construction to me known at this time, what I claim and desire to secure by Letters Patent of the United States, is

1. An adjustable store service ladder having a lower body section provided with wheels at its lower end, an extensible section corresponding in length and width with the body section. interfitting longitudinal projections upon said two sections for holding the sections in slidable engagement, brackets extending back from the upper part of the lower-section and passing outside the extensible section, a shelf supported by said brackets, wheels carried by depending lugs upon said brackets, and means for supporting the extensible section at various elevations in connection' with the body section.

2. An adjustable store service ladder having a lower body section provided with wheels at its lower end, an extensible section corresponding in length and width with the body section, hoolcshaped inter-fitting longitudinal projections upon said two sections for holding the sections in slidable engagement, brackets extending back from the upper part of the body section and passing outside the extensible section, a shelf supported by said brackets, wheels carried by depending lugs upon said brackets, and means for supporting the extensible section at various elevations in connection with the body section 3. An adjustable store service ladder having a lower body section provided with wheels at its lower end, an extensible section corresponding in length and width with the body section, inter-fitting longitudinal projections upon said two sections for holding the sections in slidable engagement, brackets extending back from the upper part of the body section and passing outside the extensible section, a shelf supported by said brackets, wheels carried by depending lugs upon said brackets, and means for supporting the extensible section at various elevations in connection with the body section, said means comprising a shaft extending between the legs of the lower section and pivoted thereto and having secured to it near each end a springpressed pawl adapted to engage with ratchet depressions in the aforementioned projections of the extensible section, and a handle midway of said shaft for manipulating the same and its attached pawls.

In testimony whereof I have hereunto signed my name to this specification in the presence of two subscribing witnesses.

FRANCIS E. SCOTT.

Witnesses ROBERT W. RANDLE, R. E. HANDLE.

Images