US80581A - williams - Google Patents

Description

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MARVIN l1'. WrLLIAMs, oF MILWAUKEE, WISCONSIN, AssiGNoR To HiMSELr AND JOHN LUNDl Letters .Patent No. 80,581, dated August 4, 1868.

IMPRQVBD ,SGAFIOLDIN TO ALL WHOM ITQMAY CNCERN: Y

Be it knou'nf that I, MARVIN T. WILLIAMS, of the city and'county of Milwaukee, `and State of Wisconsin, have invented a ewfzmd useful Improvement iu Ladders and Sca'olding; andl' do hereby declare Vthat the following is a full, elem', and exact description thereof, `which will enable those skilled in the crt to make and use the same, reference being had to the accompanying drawing, forming partof this specification, in which- Figure 1 is a perspective view of my improt'ement whenused :is a scaffold. Figure 2,-a View ofthe ladder when lextended its whole length. v

Figure 3, one of the locks which hold the parts of the ladder, in`positon when extended. Similar letters of reference in each of "the gui-es indicate corresponding parts. I The object of my invention is to construct a ladder, which, for all purposes for'whieh the com'mon ladder is used, shall be elicicnt, and also, hy joints, braces, and locks, so constructed that it may be transformed into 4a. ,scaold quickly, and be strong and handy. v y A, the side-pieces; B, rounds; C, connecting-strips; D,loeks or catches; E, springs, to keep the catches jin place; F, rods, to hold the lower 'ends' of the scaffold from spreading; G, scail`old-plank; H,hooks, to hold Vcatches D back. y

Operation.' The-scaffold being in the position shown in iig. 1, remore the scaffold-pieni; G, unhook rods F; Athen pres; K the loxrer ends outward; this will bring the upper-ends of the ,ladder together, when the catches D will enter the clots and `hold the ends firmly together. This-inches a'ladder as Shown hy lig. 2. To make u scaffold again, lpressi down the spring-end of catches D and hook over the end-hooks H, which will keep the projections of the@ catches'D out ofthe slots inthejoint-euds lol' the ladder; then turn the outer ends down till the position, g. 1, is obtained. Place the sc'aEold-plahk on :my of the rounds, according to the height required; hook rods F in the eyes in the foot of the scailold.- y

What' I claim as my invention, afnd desire to secure by Lettera Patenti, isi- The two short ladders A, pivotedto the'V bars C, having the spring-ctches l) arrznged to engage in the recesses Ainthe elds of bers A, all coristructed and arranged for use Substantially as herein shown mid described.

M. T; WILLIAMS.

,. Witnesses:

,3. B. Smm, W. E. WALnIs.

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