US59297A - Improved extension-ladder - Google Patents

Description

iran raras PATENT rs THOS. VATSON AND HAS. PERRY, OF BROOKLYN, NEWl YORK.

i-MPRovED EXTENSION-LADDER.

'To all whom it may concern: A

Be it known that we, THOMAS WATSON and CHARLES PERRY, of Brooklyn, in the county ofvKings and State of' New York, have invented a new and useful Improvement in Firemans Extension-Ladder; and we do hereby declare that the following is a full, clear, andl exact 'description thereof', which will .enable others skilled in the art to make and use the same, reference being' had to the accompanying drawings, forming part of this specification, in which- Figure 1 is a longitudinal section of our improved ladder, taken through the line 00:12, Fig. 4, showing the ladder in position for transportation. Fig. 2 is a front view of a portion of the ladder, showing the connection between the lengths when extended. Fig. 3 is a vertical longitudinal section of the ladder, taken through the line y y, Fig. 4, showing the ladder extended. Fig. 4 is a cross-section of the same, taken through line z c, Fig. 1.

Similar letters of reference indicate like parts.

an improved remans extensionlladder, so constructed and arranged thatit 1n aybe quickly and easily extended to any desired height, and may, while whollyor partly extended, be easily removed from one place or position to another; and it consists, first, in the formv of the carriage-frame upon which the ladder is carried, to which it is pivoted, and by which it is supported while being raised 5 second, in the combination of a windlass with the rear end of the carriageframe; third, connecting the carriageframe to the fore part of the truck as herein described-that is to say, in such a way that the forward end or foot of the ladder may be brought to the ground and a sufficient angle be obtained, so that the 4ladder can be raised to the desired point by the windlass; and, fourth, constructing the side bars of' the ladders in the form herein described, so that the side bars of each part ofthe ladder may form guides and slides for the adjacent parts, as

hereinafter more fully described.

A is the wheels, B the, thills, G the drivers seat, and D the frame, of the forward part of the truck. E is the wheels, and F the frame of the rear part of the truck or carriage.

The side pieces, f of the frameF are of the Oui invention has for its object to furnish form showniu Fi gul, and rest upon the springs Gr and axle H. Thefore and rear ends of the sidepieces, f1, are eomiectedtogether by the cross-harsj"Z andfs. To the front ends of the side pieces,f, are attached two bars,f4,inclin ing forward, as shown in Fig. l, the up'per or top ends of which are connected by a cross-bar, f5. To the rear part of the side pieces, f1, are attached the lower ends of two bars, f6, inclining forward, as shown in Fig. 1. rlhese bars,

near their upper ends, are connected by a cross bar or rod,f7, upon which the ladders rest, as shown in Fig. 4.

I is a bar pivoted to the frame D ofthe forward part of the truck, and terminating in a hook hooking into an eye attached to the bar f8 of the fame F, as shown in Fig. 1. rlhe har f8 extends from the lower front crossbar, f?, to the upper one, f3, being securely attached to each.

J is a bar extending from the central part ofthe barj'Z to the bar d ofthe frame, to which it is connected by a snap-hook, as shown, or by some other detachable device.

The ladder M is made in three pieces or parts, m1, m2, and m3and when being transported rides upon the frame F, as shown in Fig. l-'that is to say, the frontend or foot of the ladder rests upon the cross-bar f5, in which position it is held by a pin or pins, K, passing through the foot of the ladder, a-s shown in Fig. l. The side bars of the part m1 are made with two inwardl y-projectin g flan ges, as shown in Fig. 4, and they are-connected.together by the rounds m4 in the ordinary manner. The side bars of the second part, m2, are made with two flanges, the one projecting outward and passing under the flange of the side bars of the part m, as shown; the other projecting inward. The rounds m5 of this part are shorter than the rounds in, to accommodate the part to its inward position. The side bars of the third part, m3, are made with one fiange projectin g outward and passing under the inwardly-projecting fiati ge ofthe part m2, each lower part thus forming guides and slides for the parts above it, as shown in Fig. 4. To each side bar of the part m3, near its lower end, is attached the end of a rope or chain, L, which passes up along the inside of the said side bars and around pulleys placed in the upper ends of the side bars of the part m2,- thence they pass s f 5eme? The ropes or chains arewound upon the shaft Nby means of the crank O, and they are kept froni running back by the pawl P and ratchet-wheel R.

In using the machine, it is drawn to the desired place in the position shown in Fig. l; the fore part of the carriage is then removed and the forward end of the frame F'lowered to the ground then remove the pin or pins K,

and operate the windlass enough to allow the lower end or foot of the ladder to drop into the angle of the frame F, where it is secured f in place by one ormore pins, S,passing 'through 1 said frame and through the lower end of the ladder, as shown in Fig. 3. This brings the ladder to such an angle that it may be elevated to the desired height by simply turning the crank O, the Lipper end of the ladder sliding up along the wall of the building, To diniinish the friction between the upper end of the i ladder and the wall, friction wheels or rollers may be attached to the upper end of the ladder, if desired. The. lower ends of the parts ml and m2 being secured together by a hook,

T, the rst effect of turning the crank O will be -to project the upper part m3 to its full extent. The said hook T may then be unhooked and the ladder run out to the desired height.

It should be observed that the vladder may also be used as a lire-escape; for if any one should pass from the upper part of a building to the upper part of the ladder, and from any cause should be unable to descend the ladder, by means'ot1 the crank O the ladder may be drawn in and the person or persons quickly and safely lowered to the ground.`

What we claim as new, and desire to secure by Letters Patent, is-

1. The frame F, constructed as herein described, when used for supporting and operating an extension-ladder, substantially as described.

2. The combination of the windlass N with the rear end of the frame F, for the purpose of rails-ing and lowering an extension-ladder, substantially as described.

3. Connecting the rear oarriage-fraineF to the forward part of the truck in the manner described, and for the .purpose set forth.

4. Constructing the side bars of the ladder in -the forms herein shown and described, so that the side bars of each part may form slides and guides for the adjacent parts when raisin g and lowering the ladder.

THOMAS WATSON. CHAS. PERRY. Witnesses:

M. M. LIVINGSTON, JAMES T. GRAHAM.

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