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XX IX. Description of a ha??gmg Scnffold to be used In 

 repairing or painting Outside Walls of Houses. By 

 Mr. Joseph Davis*. 



Sir, — Oaving to repair and beautify llie frontof my house, 

 which is called the Minor-Theatre, in Catharine-street, 

 Strand, I invented a machine which answers for such pur- 

 poses much better than a scafiold, and saves considerable 

 expense. As I conceive this contrivance may be beneficial 

 t .> the public, I should be happy to submit a model thereof 

 to the Society of Arts, ?cc. lor their inspection. 



My machine is twenty-six feet long, and cost me two 

 pounds ten shillings, and when no longer wanted for this 

 purpose, the timber is worth two pounds. A single ma- 

 chine may be made tliirty-six feet long, and united to any 

 length, and when not m use, may be folded up and put by 

 as a conunon ladder. 



On this plan of 9, scaffold, there is no occasion to break 

 up the pavement, or to give the least interruption to pas- 

 sengers in the street. 



I am, sir, 



Your most humble servant, 



Catharine-street, April 14, 1812. JoSEPH DaVIS, 



To C. Taylor, AI.D. Sec. 



Reference to the Engraving of Mr. Josf.ph Davis's tein- 

 porary Scajj'old for rtpuiring the Out sides of House i. 

 Plate VI. fig. 1. 



This simple and clTective contrivance consists of nothing 

 more than a couple of pianks A, to which two others BIj 

 are nailed, forming a sort of trough or moveable scaffold. 

 Oil which the workmen stand ; which is suspended at any 

 height at pleasure. CC, DD, are two frames of wood, 

 in which the trouiih or scaO'Dld is fixed ; in the top cross- 

 pieces of these frames, two ))u!leys, E and F, are fitted, and 

 round these the ropes bv which the scaffold is sus|)euded 

 are passed ; the cuds a a of these ropes arc made fast to 

 Iwo beams, or scaffold poles, G and IJ, which project out 

 of the upper windows : f)r ihey mav be fixed over the para- 

 pel, or by anv other means, as is thought proper; two 

 suigle pulley blocks, gg, are also suspended i'rom these 



• From Trrirvmclinnn nf Ihe Sunrttj fnr the Kncrvrapemfnl nf/frls, Mamifac- 

 Iwn-f, avil Cnnimrrre, for 1812. — ^'I'he silver medal of the (Society wa« 

 »ot«'d to Mr. Davii for lliis comnniiiication, and a niucJi-l of tht; apparatus 

 i» iircu! vid i.i llic Socle y'a Rnjo»itory. 



N 2 polesj 



