Bauhaus-Universität Weimar

Palmer Research and Students' Apparatus for Physiology, Pharmacology, Psychology, Bacteriology, Phonetics, Botany, etc.: Manufactured by C. F. Palmer (London) Ltd., Myographic Works, 63a, Effra Road, Brixton, London, S.W. 2. England
Palmer, C. F.
> I 'HE majority of apparatus in a Physiological Laboratory requires to be driven at a slow speed ; and 
'*■ the most convenient, and now almost universal source of small power, is the electric motor, which, 
to be efficient, must run at a high speed. It is therefore necessary to reduce this speed. The 
following particulars of shafting and fittings show how this may be accomplished in a convenient and 
flexible manner. 
We are always pleased to offer suggestions with regard to the installation of driving gear, and to 
submit a complete layout for the Laboratory, on receipt of plan, giving size, height and position of fixtures, 
For driving Students' Drums, the usual way is to have a line of shafting down the back or centre 
of bench, according to whether the students work at one or both sides. In the latter case, the same length 
of shafting, with double the number of pulleys, will, of course, drive twice the number of drums. Such 
shafting is conveniently carried on standards, as that illustrated in Gl, placed 48" to 54" apart ; 24" is 
recommended as the best height. Sometimes, however, it is desirable that the shafting should reach over a 
number of separate tables, with space for walking between. In this case, the standards must be sufficiently 
high to allow head room. 
These high standards, however, are not recommended, since they not only need stay bars, but 
are also very inconvenient, as the average student is unable to reach the pulley to put on the drum driving 
In the Research Laboratory, a convenient form of drive is a shaft extending right across the room, 
hung from the ceiling on “ J ” hangers, as G12. If the ceiling is too high, a beam may be put across the 
room, the under side of the beam being from 8' to 9' above the floor. The “J ” hanger, illustrated in G15, 
is suitable for this, and like the standards, should be placed 4' to 4' 6" apart. The hanger shown in G20 
is useful to fix on the side of a beam, when, as often happens, pipes, etc., have already been placed on the 
under side. 
To drive the Brodie-Starling Kymograph, the most convenient arrangement is a swing arm, having 
a weight at one end and a pair of guide pulleys at the other, over which the driving band from the main 
shaft runs ; this automatically takes up the slack in the band when the Kymograph is raised. See illus¬ 
tration G102. The supporting rod can be fixed to the ceiling, or above or below a beam. In places where 
the ceiling is very low, a swing arm can be supplied with a spring in place of the weight, which would be 
dangerous should the band break. 
When apparatus such as the Brodie Respiration Pump, Kymograph Smoker, etc., is mounted on the 
wall, a pair of Guide Pulleys, G80, should be fixed above to direct the belt from the main shaft. These, of 
course, are not necessary if the shafting is carried in brackets fitted to the wall itself.


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