Sunday, July 10, 2011

Dating early Emerson 60 cycle and DC current brass blade fans



Latest update:  6-22-15, 9-12-17


Emerson fans are one of the most widely collected, and regarded by many as the best fans ever made.  I, for one, have always had a hard time remembering the dates that different models were made.  Here I have compiled a list of all of the 60 cycle AC brass blade fans that Emerson made from the earliest 1892 "Meston" until the last of the brass blade models, the 29646 and 71666 models.   I have also added the earlier steel blade models that replaced brass in 1931.


A few early models, c.1901, that you are not likely to encounter and which I have never seen have been omitted until I get more information.  (Those omitted Types turned out to be 133 cycle motors).  The dates given are believed to be accurate but some errors may have crept in.  I would like to update the list where possible if readers will let me know any additional or corrected information.


Photos above and below are of an 1898 Emerson "tripod" in my collection.  This is the first year of this version of the Type FI-1 12" 60 cycle fan.  Previous versions were made in the years 1895-96 that resembled the original "Meston" motors and in 1897, a version made for that year only.
The finish on this fan is original but the cage is a reproduction which has since been replaced with another reproduction made in steel as the original for this year would have been.  The white porcelain switch is unusual and the only one of two that I am aware of.  The switch is usually seen in black porcelain as shown at the bottom.
(click on photos for a larger view)



Production dates of early Emerson 60 cycle AC brass* blade fans by "Type":
* steel blades replaced brass in 1931
(last edits 8-4-15, 5-23-16)


  Type       Years made

1892-1898 "MESTON" Alternating Current Fan Motor desk fans with bronze motor case and switch on top front of motor, infinitely variable speeds with commutator and brushes:
 M1 (Meston) 12" desk fan 16,000 alternations (133 cycles)
 M2 (Meston) 16" desk fan, 16,000 alts

1895-96 "Emerson Electric" Alternating Induction Fan Motor (not a Meston but motor is so marked) with rear switch, no brushes or commutator (mostly bronze motor cases) 

1897 "Emerson Electric" Induction with cast iron motor case and rear switch
1898-1901 style tripod desk fans:
 FI-1  7200 alternations (60 cycles) 12" fan   
 EI-1 16,000 alts (133 cycles) 16" fan
 FI-2  7200 alts. 16" fan  
 EI-2  16,000 alts, 15" fan for 16,000 alts only on c.1895-96 motors.
    
 PI-241, PI-242 (1901-1902)  Swivel & Trunnion and Swivel frame desk fan models.

  310, 311, 320, 321, 410, 411, 420, 421, 510*, 511*, 520*, 521*, 610, 611, 620, 621  (1901)  These are shown in an Emerson data sheet but I have never seen any of them.  (*) are 133 cycle fan motors.

  710*, 711*, 720*, 721*, 810*, 811*, 820*, 821* (1902-04), all are 133 cycles and most are rarely seen.

  910,  911,  920,  921 (1902-04)  Swivel frame desk fan (911 and 921 are wall bracket fans)

1010, 1011 (1902-05), 1020 (1902), 1021 (1902)  Swivel & Trunnion desk fan (1011, 1021 are bracket fans)

1120 (1903-04)   16"  Swivel frame desk fan

1220, 1221 (1903-05)   16"  S&T, 1221 is a bracket fan     (1210, 1215 were these made?)

1310, 1311, 1320, 1321 (1903-05)  12" Swivel & Trunnion 6 blade residence fan, large diameter motor.  1311 and 1321 are bracket fans.

1500 (1909)  8" Swivel & Trunnion, "Convertable Ball" added to base for wall mounting.  First cage badge

1510 (1906-09), 1520 (1906-07)  12" & 16" S&T

1610 (1906-07), 1620 (1906)    12" & 16" S&T, 6 blade fan, large motor

1820 (1908-09)  16" Swivel & Trunnion

2010 (1908-09) 12" S&T 6 blade fan, large motor    2010a (1908) 12" S&T 6 blade fan, smaller motor similar in size to Trojan 5610 motor.

2210, 2220 (1909)  12" & 16", Emerson's first oscillator, two bearing motor with set screw blade

(For fans listed below the first two digits are the series, the middle digit is the frequency (0 for DC, 2 for 25 cycles, 3/30 cycles, 4/40, 5/50, 6/60 cycles), the fourth number is the number of blades and the last number is half of the diameter of the blade (5 is a 9" blade on brass models but a 10" fan on later models, probably that use steel blades).  Note: only 60 cycle models are listed below but other frequencies were made in most Types.

11644 (1910),  11646 (1910-11),  11648 (1910-11), 11666 (1910)   Swivel & Trunnion, first series with cage badge other than Type 1500 

12646, 12648, 12666 (1910-11)  second design oscillator

14644 (1911-12 or 13?),  14646 (1912-13?),  14648 (1912-13?),  14666 (1911)  Swivel & Trunnion, step base replaces earlier ornate base

15644 (1911-12)  Bedpost fan similar to 14644 but with bracket to attach to bedpost, 1 speed

16646 (1912-13?), 16648 (1912-13?), 16666 (1912-13?)  Oscillator, second style gearbox

17666  (1912 )  Swivel & Trunnion

19644 (1914-15 or 16), 19645 (1916-19), 19646 (1914-18), 19648 (1914-18), 19666 (1914-17)  Swivel & Trunnion.  Steel cages in 1918.  Change from cast hub to stamped hub blade during production.

21645 ((1915-16),  21646 (1914-16),  21648 (1914-16),  21666 (1914-16)  Oscillator with new, third type of gearbox, last to use the step base.  Still cast hub blades.

24645 (1917-19),  24646 (1917-18),  24648 (1917-19),  24666 (1917-18),  24668 (1917-18)  Oscillator, new cone shaped base (except for 24645 which used step base with thicker bottom flange), steel cages for 1918.   Change from cast hub to stamped hub blade during production.

26645 (1920-22),  26646 (1919-22),  26648 (1919-22)  Non-oscillator, modified cone base with felt base plate.  Steel cages from here on forward.

27645 (1920-22),  27646 (1919-22),  27666 (1919-22),  27648 (1919-22),  27668 (1920-22)  Oscillator

28645 (1922-23),  28646 (1922-1937),  28648 (1922-23)  Non-oscillator

29645 (1922-25?), 29646 (1922-1936), 29666 (lg. motor)(1922 only),  29648 (1922-c.1929),  29668 (1922-at least 1926, probably through '27)  Oscillator  (71666 replaces 29666 in 1923)

30648  (1922 only)  Non-oscillator 


71666 (1923-1935)  Oscillator, small motor replaces previous 29666 large motor on 6 blade oscillators

72646 (1938-41), replaced 28646, non-oscillator

73646 (1937-41), 73648 (1928-1939), 73668 (1928-1935)  Oscillator

Notes:  (from discussions with Bill Voigt and other sources)
1. Speed numbers OFF  1  2  or OFF  1  2   3  for 1911 and before, changed to OFF  3  2  1 for 1912 and later with 1 the being the high speed, 2 medium, and 3 low speed on all models.
2. Stamped blade hub replaces cast hub on last of 19xxx and 24xxx Types  (21xxx are cast hub)
3. Polished brass blades replaced with dull finish (gold paint) on brass blades starting in 1921 for 26xxx and 27xxx series
4. Pyramid badge (Built to Last) c.1926  (registered June 9, 1925)
5. Improved Parker blade c.1927-29,  12" before the 16"?
6. Gold painted hub in 1922 replaces black painted hub immediately after earliest 29646
7. Steel blades in 1931 replace brass blades
8. Last mechanical start switch 1910-1911 (11xxx and 12xxx types).
9. Emerson "date code" first used c.1929 (possibly c.1922 with a stamped number) on full grade Emersons and  c.1923 on Emerson Junior line.  Add "20" to the one or two digit number on motor tag or cage badge to get
    the date the fan was built.
10. First  "force feed lubrication system" using spiral grooves in rotor 1928 on 73648 & 73668 16" models only. 
    Force Feed lubrication added to all 12" and 16" parker and overlapping blade models in 1937.
11. First capacitor in base- 1937 on 73xxx and 77xxx types
12. First overlapping blades 1935, 77xxx type
13. First Emerson Junior in 1922, 9" steel blade painted gold, switch added to Junior models in 1925, oscillator in                                     1926
14. 10 foot cord and plug provided on all fans c.1916-17 (and probably other years)
15. First carrying handles on top of motor on 12" and 16" models in 1917 for oscillators, not sure about stationary.



*PI-241 was previously thought to have been produced 1899-1900.  Information from Emerson catalogs 
    places the dates at 1901-02 with the auto-start models introduced in 1902.  For more information on 
    dating PI-241s see The Fan Collector magazine (AFCA), February 2001, v.14, no.1

 Trojan  The Emerson Trojan line of fans was Emerson's less expensive line and used a two bearing motor instead of the single bearing used on the top of the line Emerson fans.
 Type       Years made
5110,  5111,  5120,  5121 (1904-05)  S&T, pancake motor, non-oscillator, 4 blade fan
5210,  5211 (1904-05)  S&T, non-oscillator, pancake motor,  6 blade fan
5310,  5320 (1906-09)  S&T, non-oscillator (rear bearing cap only on 1909 models?)
5410 (1906-07)  S&T, non-oscillator, thick pancake motor,  6 blade fan
5610 (1908-09)  S&T, non-oscillator,  6 blade fan
51646,  51648 (1910-11)  S&T, non-oscillator, replaced 5310, 5320 (all have rear bearing caps.)
52646,  52648 (1910-11)  First Trojan oscillator
53644 (1911-12)  8" all brass non-oscillator, stamped blade, three speeds
53646,  53648 (1912)  Non-oscillator, three speeds, step base replaces ornate base, "Trojan"cage badge.
54646,  54648 (1912)  Oscillator , step base, three speeds, "Trojan" cage badge


 Emerson Direct Current brass blade* fans
(for standard voltages- other models were made for other voltages)
* steel blades replaced brass in 1931

Latest edit: 6-22-15, 1-20-16
 Type     Years made
 1015     (1905)   12"    Swivel & Trunnion desk fan
 1016     (1905)   12"    S&T bracket fan
 1025     (1905)   16"    S&T desk
 1026     (1905)   16"    S&T bracket
 1115     (1906-09)  12"   swivel & trunnion desk
 1125     (1906-09)  16"   S&T desk
 1215     (1908-09)  12"   residence (6 blade fan) S&T desk
11044    (1912-13)    8"   S&T desk
11046    (1910-12)  12"   S&T desk
11048    (1910-12)  16"   S&T desk
11066    (1910-12)  12"   residence S&T desk
14046    (1913)   12"   S&T desk
14048    (1913)   16"   S&T desk
14066    (1913)   12"   residence S&T desk
15044    (1912)     8"   bedstead S&T
16046    (1912-13)  12"   hinged oscillator
16048    (1912-13)  16"   hinged oscillator
16066    (1912-13)  12"   hinged residence oscillator
18046    (1913-14)  12"   ventilating fan
18048    (1913-14)  16"   ventilating fan
19044    (1914)     8"    convertible S&T desk
19045    (1917-19)   9"   S&T desk
19046    (1914-19?)   12"    conv. S&T desk
19048    (1914-19?)   16"    conv. S&T desk
19066    (1914-19?)   12"    conv. residence S&T desk
21046    (1914)   12"    hinged oscillator
21048    (1914)   16"    hinged oscillator
21066    (1914)   12"    hinged residence oscillator
23045    (1915-16)   9"   hinged oscillator
23046    (1915-16)  12"  hinged oscillator
23048    (1915-16)  16"  hinged oscillator
23066    (1915-16)  12"  hinged residence oscillator
24045    (1917-19)   9"   hinged oscillator
24046    (1917-19)  12"  hinged oscillator
24048    (1917-19)  16"  hinged oscillator
24066    (1917)     12"   hinged residence oscillator
26045    (1920-23)    9"  non-oscillator 
26046    (1919-24)  12"  non-oscillator
26048    (1920-23)  16"  non-oscillator
27045    (1920-22)    9"  oscillator
27046    (1919-23)  12"  oscillator  (last ball motor)
27048    (1919-24)  16"  oscillator  (last ball motor)
28045    (1924-1930)    9"  non-oscillator
28046    (1925-1939)     12"   non-oscillator
29045    (1923-28+?)    9"  oscillator
29046    (1924-28+?)  12"  oscillator
29048    (1924-28+?)  16"  oscillator
71045    (c.1929-1937)  10"  oscillator
73045    (1938)   10" oscillator
75046    (c.1930-1939)  12" oscillator
75048    (c.1930-1939)  16" oscillator
76045    (? -1937)  10" non-oscillator
78045    (1938)   10" non-oscillator

Notes:
All DC Emerson fan motors have two bearings
Parker blades are used on all DC motors and have a set screw to hold blade to shaft.
12" and 16" have ball shaped motors through the 27xxx models.
12" and 16" fans have more or less cylindrically shaped motors after the 27xxx models.
8" and 9" motors are small and cylindrical shaped.
1930 was the last year for brass blades which were painted with gold paint from c.1921
Steel blades replaced brass on the 1931 models.
The last "trunnion" mounted motors were the 19xxx models.









PI-241 swivel base, 1900-1901
1894 Emerson M1 tripod



The PI-241 came as a single speed swivel base and a two speed swivel & trunnion base.  All PI-241 models used an aluminum motor tag that was also used on the last of the tripod fans which were still sold when the PI-241 was introduced.  With the following Types 910 (swivel) and 1010 (swivel & trunnion) the motor tag was changed to nickeled brass.



The page to the right and those below are from an Emerson catalog dated Jan. 1, 1903.  Additional pricing pages were in the catalog for 16,000 alt. (133 cycle high frequency) and ceiling fans.

Note the three voltages that each fan was offered in.  In the days before the fans were convertible from desk to bracket fans beginning with the Type 1510 a separate bracket Type model was offered differing only in the base of the fan motor.


                      Click on page to enlarge.


Emerson had a design advantage over their competitors in their use of a long, single 1/2" hardened steel bearing in place of the usual two bearings, front and rear of the motor.  While some other fans used a single bearing it was not of the same size nor hardened steel as Emerson used.  The long term advantage of the Emerson design was a very long life for the bearing.  The less expensive line of Trojan fans did not use this single bearing but, instead, used two bearings, front and rear, in the motor.












Wiring Diagrams for Some Emerson Fan Models
Thank you Tom Newcityl.   Please note that these are the oscillating models but the
 corresponding non-oscillators use the same wiring diagrams.  Added 9-12-17