The New Antique Store Brass Sundial Compass

Introduction

This manual provides instructions for the proper setup, operation, and maintenance of your The New Antique Store Brass Sundial Compass, Model 1660 b. This instrument combines a functional magnetic compass with a sundial, offering both directional guidance and solar time-telling capabilities. It is crafted from brass with an antique finish and comes with a protective wooden box.

Image 1: The Brass Sundial Compass and its accompanying wooden box.

Components Overview

Your sundial compass consists of several key parts:

• Compass Base: The main body housing the magnetic compass.
• Magnetic Compass: Indicates magnetic North.
• Sundial Plate (Dial Plate): The circular plate with Roman numerals (I-XII) for telling time.
• Gnomon: The triangular or adjustable arm that casts a shadow onto the sundial plate. This is often foldable.
• Latitude Scale: An arc with degree markings used to set the gnomon to your local latitude.
• Leveling Feet: Adjustable feet on the base to ensure the instrument is perfectly horizontal.
• Spirit Level: A small bubble level integrated into the base to aid in leveling.
• Wooden Box: For protection and storage.

Image 2: Detailed view of the sundial compass components, including the spirit level.

Setup and Calibration

To ensure accurate readings, proper setup is essential:

1. Unpack the Instrument: Carefully remove the sundial compass from its wooden box.
2. Place on a Level Surface: Position the instrument on a stable, flat surface outdoors where it will receive direct sunlight. Use the integrated spirit level to ensure the base is perfectly horizontal. Adjust the leveling feet as needed until the bubble is centered.
3. Set the Gnomon to Local Latitude: The gnomon (the shadow-casting arm) must be set to an angle equal to your geographical latitude. Locate the latitude scale on the instrument and adjust the gnomon to the correct degree for your location. For example, if your latitude is 40 degrees North, set the gnomon to 40 degrees.
4. Orient the Compass to True North:
   • First, allow the magnetic compass needle to settle and point to Magnetic North.
   • Determine your local magnetic declination (the difference between Magnetic North and True North). This value varies by location and can be found online or on topographical maps.
   • Rotate the entire sundial compass until the compass needle points to True North, accounting for magnetic declination. For instance, if declination is 10 degrees East, rotate the compass so the needle points 10 degrees East of the 'N' mark on the compass dial.

Image 3: The sundial compass nestled within its protective wooden box.

Operating Instructions

Using the Sundial for Time-Telling

Once the sundial compass is properly leveled and oriented to True North with the gnomon set to your latitude:

1. Ensure the gnomon is fully extended and casting a clear shadow.
2. Read the time by observing where the shadow of the gnomon falls on the sundial plate's Roman numerals. The sundial displays local apparent solar time.
3. Note on Accuracy: Sundials show local apparent solar time, which can differ from standard clock time due to the Earth's elliptical orbit and axial tilt (Equation of Time). Additionally, adjustments for Daylight Saving Time are not inherent to a sundial and must be mentally calculated by the user.

Image 4: The sundial plate, showing Roman numerals for time indication.

Using the Compass for Direction

The integrated magnetic compass provides directional information:

1. Ensure the compass needle is free to move and has settled.
2. The red or marked end of the needle typically points towards Magnetic North.
3. To find True North, you must apply the local magnetic declination as described in the Setup section.
4. Avoid using the compass near large metal objects or strong electromagnetic fields, as these can interfere with its accuracy.

Image 5: The magnetic compass, indicating cardinal directions.

Maintenance and Care

To preserve the appearance and functionality of your brass sundial compass:

• Cleaning Brass: Gently wipe brass surfaces with a soft, dry cloth. For tarnishing, use a brass-specific cleaning solution sparingly, following the product's instructions. Avoid abrasive cleaners or harsh chemicals that can damage the antique finish.
• Wooden Box Care: The hardwood box can be cleaned with a soft, slightly damp cloth. Avoid excessive moisture. Periodically, a small amount of wood polish or wax can be applied to maintain its luster.
• Storage: When not in use, store the sundial compass in its wooden box in a dry environment, away from extreme temperatures and direct sunlight, to prevent tarnishing and wood warping.
• Compass Protection: Ensure the compass needle is locked (if a locking mechanism is present) or kept away from strong magnetic fields during storage to prevent demagnetization.

Image 6: The protective wooden box for the sundial compass.

Troubleshooting

• Compass Needle Sticks: If the compass needle appears stuck or does not move freely, gently tap the side of the instrument. Ensure it is placed on a perfectly level surface and away from any magnetic interference (e.g., electronic devices, metal objects).
• Sundial Time is Inaccurate:
  • Verify that the instrument is perfectly level using the spirit level.
  • Confirm the gnomon is set to your correct local latitude.
  • Ensure the compass is accurately oriented to True North, accounting for magnetic declination.
  • Remember that sundials show local apparent solar time, which may differ from standard time.
• No Shadow Cast by Gnomon: The sundial requires direct sunlight to function. Ensure it is placed in an unobstructed area during daylight hours.

Specifications

Image 7: Product dimensions for the sundial compass.

Warranty and Support

For information regarding warranty coverage or product support, please refer to the documentation provided at the time of purchase or contact The New Antique Store directly through their official channels. Keep your purchase receipt as proof of purchase.