132 [ASSEMULT 



Hot Mr Furnace for Factories. 



A plan for the above purpose was exhibited by Mr. Daniel Grif- 

 fin of the city of New-York, and for which a gold medal was 

 awarded. 



Furnaces upon this plan having been put in operation, and econi- 

 mical in consumption of fuel, and effective as a heater upon a large 

 scale, your committee gave it their unqualified approval. 



Improvement in Window Shutters. ' 



A novel plan of metallic window shutters with rolling slats, was 

 exhibited by Messrs D. D. Badger & Co., of Boston, and for which 

 a gold medal was awarded. 



The common window blinds or shutters are made to open or shut 

 by swinging upon hinges for that purpose; in this case, the blinds 

 are wound upon a roller, sunk in a tecess in the wall at the top of 

 the window to open, and the same by a reverse turn is unwound and 

 let down, to close; this is effected by suitable rollers at top and bot- 

 tom, to which at each end, chains so formed as to receive the slats, 

 are attached, and by a vertical shaft placed w^ithin the casement, and 

 having gearing to connect it to the rollers is worked by a wrench 

 inside: these chains are so constructed and connected with the slats, 

 as to have the effect to roll or turn the latter to open or close them: 

 that by the two-fold action of winding the whole sheet of slats at- 

 tached to the chains, and by the rolling of the slats, a close or open 

 blind may be had, or a closed or open shutter may be given. 



The material being all metal, and the machinery considerable to 

 effect the above named movements, the shutter is somewhat expen- 

 sive; it however is quite secure against burglars — is fire proof; con- 

 venient to open and close, and elegant in appearance; and your 

 committee cannot doubt that they wnll be extensively introduced 

 into the fronts of stores into large cities. 



Steam Register and Vacuum Gage. 



A most ingenious and valuable machine for recording the number 

 ol strokes of the engine, and giving the degree of the pressure, and 

 state of the steam of an engine, was exhibited by Horatio Allen, 

 Esq., of the Novelty Iron Works, in the city of New-York, and for 

 which a gold medal was awarded. 



