The continued success of motion pictures as an entertainment has made it
necessary that some of the time-honoured methods of producing stage
effects, should be replaced with instruments more adaptable to the
limited space of cinematograph theatres. There is no room for instance
for a thunder sheet in the operator’s box, or beside the pianist.
Incidentally the legitimate stage is also the gainer.
[Illustration:
‘RIPPLING WAVES’
]
The following devices here illustrated are the invention of Mr A. H.
Moorhouse of Stalybridge.
[Illustration: FIG 1 FIG 2]
[Illustration:
Fig. 3.
]
In the first, Figs. 1 and 2, we have an instrument for imitating the
trotting horses which can be tuned to any speed or strength. A number of
cups are used. ‘A’ one fitting over the other and connected by a spring
‘B.’ The top cup has cuts round the edge to let the sound out. By
turning the handle which has the tappets C1 and C2 mounted on its shaft,
the top cup is thrown off the other (see Fig. 2) until the tappet C
clears when it (the cup) returns making the necessary sound. Now each
tappet can be set on the shaft at a different angle, so that the cups
open and shut one after the other, thus producing a continuous trotting
effect. In order to obtain distance effects the inventor has provided a
foot lever by pressing which the platform of the lower cups is thrown
out of the vertical, thus the tappet only partially strikes the top cup
and the sound is consequently much fainter, but as the lever is
gradually released the trotting increases in intensity. By having a
suspended rod of sleigh-bells, with spring projections for the tappets
to strike, effects of moving vehicles can be obtained.
The second drawing (Fig. 3) shows a drum fitted up for producing a
variety of sound effects. ‘M’ is a kind of apron of woven wire, which is
wound on a drum ‘P’ by means of the handle shown. When the drum is
struck the skin on returning strikes the mat with a sharp crack or bang,
a sound resembling the firing of heavy artillery. By winding up the mat
on its roller the sound can be increased or decreased as desired. On
another part of the drum ‘R’ is an instrument for producing the effect
of a motor car travelling at various speeds. This can be attached to
clock-work mechanism instead of using the handle or lever.
The handle can also be used for working the valve S (compressed air is
admitted to the casings and can be made to operate on the various
instrument V for producing imitations of wind, whistles, sirens, horns,
or any sound producer) that is attached to the valve.
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