QUALITY IS OUR BUSINESS
featuring original developments and advancements to
provide better products to do a better job.
Quality Materials ...
employing the best currently available for the job.
Quality Performance ...
resulting from Quality Design, Quality Materials.
Quality Manufacture ...
assuring customers maximum service life, minimum maintenance
and genuine satisfaction with Leslie products.
Quality Service ...
provided by trained and
experienced personnel to supply prompt, reliable answers to inquiries and
questions—to fill orders promptly and accurately— and to render
customer service in the field when and where it is needed.
to these fundamental principles
has built the solid reputation which Leslie enjoys today—and the
present organization is dedicated to maintaining these principles in the
interest of its customers.
A LOGARITHMIC UNIT
It is important to remember that the decibel (dB) is a logarithmic measure
and when comparing the sound output of whistles, a direct numerical comparison
cannot be made. A whistle with an output of 110 dB will sound about twice as loud (93% louder) as one with an output
of 100 dB. Each 10 dB increase in output increases loudness by 93%, or approximately double.
If frequency distribution, direction and air
consumption remain constant, an increase of 10 dB in sound level would require the louder whistle to be
twice as efficient at converting air energy into sound energy.
Leslie Co.'s headquarters in Tampa, Florida.
LESLIE CONTROLS, INC.
Each new stride in the
development of industry and commerce has meant new demands on audio-signal
equipment. Greater sound output with lower air
consumption has been the continuing keynote for signal
improvements in both the industrial and transportation
fields. Leslie engineers have designed the most modern,
complete line of air whistles available anywhere.
RS Series Air Whistles, indicate Leslie-Supertyfon or
specify: "Diaphragm type utilizing a single leaf stain-less
steel diaphragm with molded-on silicone cushion
When ordering, be sure to specify Leslie whistles and
to include the following:
Model and size of whistle (see whistle designation on chart), service or application.|
|Operating medium Electric.|
|Minimum and maximum operating pressures.|
|Type of operation — Manual, Manual/Electric,
|For electrical operation, specify voltage available,
A.C. or D.C., frequency and manual or automatic
|When ordering for industrial plants, include a
sketch showing buildings, surrounding
obstructions, area to covered, general weather conditions
and prevailing winds.|
|When ordering parts always use part reference
number from the applicable engineering drawing
of the equipment, and quantity of each part.|
Note 1- The selections indicated above are
based on user experience as
those found to be most effective
for the application.
Note 2- Multiple frequencies depending
on combinations selected.
Note 3- Ideal for ocean- going drilling platforms.
* To estimate sound decay subtract 6 dB each time the
DECIBEL RATING 100 FT. WITH 100 PSI
Free field test with indicated pressure
measured at whistle base.
AUDIBLE DISTANCE STATUE MILES,
CALM WATHER, 100 PSI SUPPLY.
Estimate based on spherical divergence and final
ambient noise level of 70
db on flat, unobstructed terrain; wind,
atmospheric and other local conditional
will affect atual audible range.
|R.S. SERIES AIR
||Single, two, three
Single tone and chime whistles
are available for marine
use. Single tone and quad
units are furnished for
|Originally designed to meet the
needs of the railroads for an extremely low air consumption unit with increased sound output and a
distinctive range of notes, the Leslie-Supertyfon has proved itself to be by far the most efficient of all
air whistles of any design. The unmatched performance and economy of the railroad
Leslie-Supertyfon is also available for industrial and marine applications.
• Cushioned Diaphragm—A silicone rubber ring molded to the outside edge of the diaphragm
eliminates metal-to-metal rub-bing and wear.
• Reliable Operation—Endurance test for over 2,000 blowing hours with no significant wear or
change in performance.
|• Resistant to Freezing—The
new silicone cushioned diaphragm has been tested to -65°F.
• Lowest Air Consumption—Lower air consumption than other air whistles for the same sound out-put.
• All Parts Standard and Inter-changeable— All Leslie-Super-tyfon operating parts are precision
made and fully interchangeable in all whistle sizes.
• Sharp, Clear Signals—At start and end of blast, readily adapt-able
• Electrical and Automatic Opera-tion— May be fitted with solenoid operating valves or automatic