National Rotary Machines
Rotary Shuttle Machines
– One bobbin cover plate to the left of the machine. Serial number at base of upright pillar or on the underside of machine
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|Model||Size||Body Shape||Inspection Plate(s)||Upper Tension||Stitch Length Control||Notes|
|Full||Rounded||Shoulder||Front||Bed Screw||(Eldredge Rotary) 1904-08 Early bobbin & case. The hook cover has curved edges, whereas all later machines had rectangular hook cover plates.|
|Full||Rounded||Shoulder - Centre Arm Raised||Face Plate||Bed Screw Lever||
(Pritzlaff) Not Reversew (National's name for reverse sewing ability), non-electric. Rotary machines manufactured after January 1st, 1916 use certain slightly different parts eg tension and face plate.
|Rotary A2 (no picture)||Full||Angular||Shoulder - Centre Arm Raised||Face Plate||Bed Screw Lever||Law p.22|
|Full||Rounded||Shoulder - Centre Arm Raised||Face Plate||Bed Screw Lever|| (R41) Modernized Rotary A c1948: Reversew, separate
reversing knob on bed. Non-electric.
|Full||Rounded||Shoulder||Face Plate||Bed Screw Lever||Internal motor patented Oct. 5, 1920 by Charles H'Doubler, later
modifications. Electric, not Reversew.
|Full||Rounded||Shoulder - Centre Arm Raised||Face Plate||Bed Screw||(1100) Hand crank c1929.|
|Full||Rounded||Shoulder||Face Plate||?||(1120) Electric portable.|
|Full||Rounded||Shoulder||Face Plate||Pillar Lever||Electric model, motor not built in, Reversew, krinkled finish. Light patented in 1935. Bed 14 5/8" long x 6 13/16"|
|Full||Rounded||Shoulder||Face Plate||Pillar Lever||(R40) Electric, Reversew (no knob on bed of machine). c1949|
|Full||Rounded||Shoulder||Face Plate||Bed Screw Lever||(Princess) Features of R40 (electric Reversew without the reverse knob) and R41 (non-electric Reversew with the reverse knob, but without the central spool pin towards the center of the arm). Sub model version of the R41 with the Rotary B body. Separate reversing lever knob on bed.|
|Full||Rounded||Shoulder||Face Plate - Inside||Pillar Lever||(RBR-2W) Reversew, electric.|
|¾ Sized||Angular||Rear||Face Plate||Bed Screw - Front||Made by Portman, not National, and sold under various names. See Portman album in NeedleBar's Picture Library.|
|¾ Sized||Rounded||Shoulder||Face Plate||Bed Screw||1935. Aluminum body, motor to front. Charles H'Doubler's thread control mechanism in the machine head. Sold as General Electric.|
|Full||Rounded||Shoulder||Face Plate||Bed Screw||(Eldredge Two Spool) Uses small spool of thread in a canister instead of a bobbin in a case. Later machines were electric using same electrical parts as Rotary C.
1914/1916 onwards. Serial numbers begin with H, after inventor Richard Hohmann.