IMPROVEMENT IN BOORS. 



XL 



59 



Method of preventing Dnors from Dragging on Carpets, or 

 admitting-Air underneath them. By Mr. John Tad*. 



SIR, 



JL Have taken the liberty of laying before the Society a Method of pre- 

 model of my invention to prevent doors from dragging on renting air- 



1,1 , .1 r- i -i • i • ,i t'ght doors 



carpets, and to keep out the current ot cold air, which en- from digging 

 ters under such doors as are not close to the carpets under- on carpets, 

 neath them. 



I can affix this machinery to the bottom of any door, so 

 that the door shall pass over the carpet with ease, and, when 

 shut, be air tight. It obviates the necessity of screw rising 

 hinges, and is less expensive than other inventions for the 

 same purpose. 



The machinery is constructed of a slip of well seasoned 

 beech wood, equal in length to the width of the door; this 

 slip is one inch and a quarter wide, and half an inch thick, 

 and to be covered with green cloth on the i nside ; it is to 

 be hung to the bottom of the door with three small brass 

 hinges, and is drawn up by a concealed spring as the door 

 opens, and is forced down when the door shuts, by one end 

 of it, which is semicircular, pressing upon a concave semi- 

 circular piece of hard beech wood, fastened at the bottom 

 of the door case, and which holds it down close to the floor 

 or carpet, so as to exclude the air from entering under it, 

 Hoping this invention will meet with the approbation -of the 

 Society, I remain, with respect, 

 Sir, 



Your most humble Servant, 

 No. 4, Little Hermitage Street, JOHN" TAD. 



Wapping,Nov. 24, 180?. 



A Certificate was received from Mr. William French, Ceitificate of 

 No. 280, Wapping, stating, that John Tad had fixed to its efficacy, 

 two of his room doors the invention above mentioned, and 



* Trans, of the Society of Arts, vol. XXVI, p, 196. Five guineas 

 were voted to Mr. Tad, fox this communication., 



that 



