Share your favorites on Show & Tell

Schatz Standard 400 Day Clock (Enamel Dial), 1952

In Clocks > German and Austrian Clocks > Show & Tell.
German and Austrian Clocks100 of 113Schatz Standard 400 Day Clock, No Name on Dial, ca. 1950Schatz Standard 400 Day Clock, 1952, with Engraved, Silvered Dial.
1
Love it
1
Like it

rlwindlerlwindle likes this.
Woman34Woman34 loves this.
Add to collection

Please create an account, or Log in here

If you don't have an account, create one here.


Create a Show & TellReport as inappropriate



Posted 4 years ago

Email

bigben
(72 items)

This is the type of 400 day clock most often seen - having the enamel dial with Arabic numerals and flower decorations. This example is dated dated 10 54 (October 1954) on the back of the movement. This one has leveling discs, but many (if not most) Schatz standards do not.

Why 400 Day Clocks Run So Long

Typical clocks run either one day or eight days on one winding. To make 400 day clocks run longer, a torsion pendulum is used. A torsion pendulum hangs from a thin wire and rotates in one direction and then the other, instead of swinging back and forth as a standard pendulum does.

Standard 400 Day Clock (about 12 inches tall)

A Standard or full sized 400 day clock has a torsion pendulum which makes a rotation in 7.5 seconds, or 8 rotations each minute (four rotations in each direction). The clock makes one “tick” near the end of each rotation. Preceding each tick, a gear with pointed teeth called the escape wheel has been giving an impulse to the pallet assembly. During impulse, a vertical pin in the pallet assembly pushes a fork to the left or right. The fork applies this energy to the suspension spring (the thin wire holding the pendulum), and the suspension spring transfers some of this energy to the pendulum.

The clock movement supplies one unit of energy to the pendulum for each oscillation. A torsion pendulum oscillates about 8 to 20 times more slowly than a swinging pendulum. This represents a major savings in energy, enough for an 8-day clock run 64 to 160 days. Further energy savings is obtained by using smaller pivots (load bearing areas on the ends of gear arbors or shafts) and by using small gears. By having more gears than an 8 day clock, the mainspring is made to unwind slowly enough for the clock to run about 400 days.

Comments

  1. Jimmy Hatcher, 4 years ago
    what do you think a clock like this might cst somebody?
  2. Danny Gardea, 3 years ago
    How can I tell if spring is in good conditions. My problem is the timing and stops after 10 or 15 minutes...

Want to post a comment?

Create an account or login in order to post a comment.