Warren Telechron Patents

Henry E. Warren received many patents for battery driven clocks, synchronous electric clock systems, clock motors, movements, etc. Some selected ones are listed here.

Synchronous Motor Patents

Patent Number

Issue Date

Filing Date

Title

Summary

1,283,431 Oct. 29, 1918 Aug. 21, 1916 Electric Clock System A system of A/C electric clocks, a means for regulating the generator and comparing it with a separate master clock, and the type A motor

1,283,432

Oct. 29, 1918

Dec. 26, 1916

Self-Starting Synchronous Motor

Basic motor idea.

1,283,433

Oct. 29, 1918

Feb. 5, 1917

Self-Starting Synchronous Motor

Rotor and stator are in a sealed housing. Rotor can be uncoupled from load while starting. Synchronizing element can be removed from maximum influence of magnetic field and then moved into it when synchronous speed is nearly reached

1,283,435

Oct. 29, 1918

Sept. 19, 1918

Self-Starting Synchronous Motor

Basic layout of the type A motor.

1,430,867

Oct. 3, 1922

Sept. 1, 1920

Lubricating system

Type B rotor and its lubrication

1,456,082

May 22, 1923

Sept. 1, 1920

Motor Drive

Type B motor (patent has same drawing as #1,430,867

1,495,936

May 27, 1924

April 12, 1922

Motor Drive

Improvements in type B rotor, especially regarding the lubrication system

Power Outage Indicator Patents

Patent Number

Issue Date

Filing Date

Title

Summary

1.334.423

Mar. 23, 1920

Jan. 4, 1917

Indicator for Electrically Driven Clocks

Basic idea for the standard power outage indicator.

Master Clock Patents

Patent Number

Issue Date

Filing Date

Title

Summary

1,502,493

July 22, 1924

April 15, 1918

Time Indicating Apparatus

Type A Master Clock

1,502,494 July 22, 1924 April 2, 1920 Time Indicating Apparatus Type B Master Clock
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