630 
Report  on  Implements  at  York. 
the  continual  risk  of  damage  to  the  working  parts  of  the  engine 
by  the  carelessness  of  the  attendant.  Securely  fastened  to  the 
smoke-box  is  an  endless  screw,  worked  by  a handle,  which 
actuates  a small  windlass,  and  thereby  winds  up  the  chimney  by 
means  of  a chain  which  passes  through  an  eye  in  a plate  at  the 
bottom  of  the  chimney,  and  is  attached  to  a rod  which  termi- 
nates at  the  top  of  the  chimney.  The  advantages  claimed  by 
the  patentee  are  : — 
The  great  saving  of  time  ; prevention  of  accidents ; no  risk 
of  damage  to  the  working-rods  and  other  parts  of  the  engine  by 
the  attendant  standing  on  them  ; no  bolts  required  for  holding 
•chimney  up. 
The  cost  of  the  apparatus  complete  is  4 1.  17s.  Qd. 
Fig.  29. — Coultas's  Chimney  Elevator. 
Messrs.  R.  J.  and  II.  Wilder , of  Wallingford,  exhibited  a 
Patent  Elevator  and  Horse  Gear  which  had  some  novel  features. 
The  motion  is  communicated  from  the  horse  gear  by  a wire  rope 
through  an  improved  clip  drum  gear.  The  clips  are  attached  to 
the  drum  without  nuts  or  bolts,  being  hung  on  and  easily 
removed.  This  arrangement  is  possible  in  the  case  of  drums  oi 
small  diameter.  There  is  an  ingenious  adjustment  to  compen- 
sate for  the  stretching  of  the  rope,  by  altering  the  position  of  one 
drum.  In  the  elevator,  which  as  to  general  construction  follow.1 
