LISTING OF CHINESE VECTOR (HYPERBOLIC) SLIDE RULES December 18, 2006
by Richard Smith Hughes and William K. Robinson
Maker, Name and Other Information
  (See the footnotes below this list for sources of information; and for explanations of symbols used, and for values of the different gauge and cursor marks).    
1 CHINA BEIJING 6681 Haiou Pai (Seagull) See Haiou Pai on this list 25 cm.; Plastic; Cursor is not framed. Has fixed plastic end brackets and rubber feet. WKR  
Front scales: || Ln01, Ln02, Ln03, DF || CF, CIF, H, CI, C || D, LL3, LL2, LL1 || Back scales: || L, Sh1, Sh2, A || B, T, ST, S, C || D, P, Th, Ch ||  
  Need gauge marks and cursor lines information as pictures do not show this detail.                      
2 CHINA BEIJING LIXUE       No number       Same as listed under Sida (China) 1083       Has same scales as K&E 4083-3 (1939-1946)     R. H.  
3 CHINA SHANGHAI       Cultural Revolution Slide Rule 1002   This appears to be a renamed Flying Fish 1002       eBay  
4 CHINA SHANGHAI 1015-1   Maybe same as listing under Flying Fish 1015-1 eBay  
  Do not have a picture or manual for this slide rule. Hopp does not list it. Need complete information: listing of details of dimensions, physical appearance, scales, gauge marks,cursor lines, etc.      
5 CHINA SHANGHAI 1018     Maybe same as listing under Flying Fish 1018 eBay  
  Do not have a picture or manual for this slide rule. Hopp does not list it. Need complete information: listing of details of dimensions, physical appearance, scales, gauge marks,cursor lines, etc.      
6 CHINA SHANGHAI     5891       See this listed under Shanghai (China) 5891 Has same scales as K&E 4083-3 (1955-1961) R. H.  
7 DING FENG (China) Slide Rule has no ID No. or name on it; Box has No. 5471 25 cm.; Plastic face on laminated wood; Cursor is framed; Adjustable metal end brackets. R. H. &  
Front scales:|| 2D, L, K, A || Tan&Cot, Sin&Cos, H, CI, C || D, Th, Sh1, Sh2 || CF and DF are folded at π. Back scales: || LL1I, LL2I, LL3I, DF || CF, CIF, H, CI, C || D, LL3, LL2, LL1|| WKR  
  Gauge Marks on scales: on front C scale are the marks lo and R. On back p is on the DF scale.           Cursor Front and Back: has no marks.    
8 DING FENG (China) No. 5471 Duplex Vector   Source: Hopp page 161 25 cm.; Plastic face on laminated wood; Cursor is framed. PMH  
Front scales: || Th, L, K, A || B, S, H, T, C || D, DI, Sh2, Sh1 || Back scales: || LL01, LL02, LL03, DF || CF, CIF, H, CI, C || D, LL3, LL2, LL1|| eBay  
  Gauge Marks on scales: Need information                 Cursor Front and Back: Need information.    
9 DING FENG (China) No. 5571   25 cm; Plastic face on laminated wood ;Cursor is not framed; Adjustable metal end brackets. R. H.
Front scales:|| 2D, L, K, A || Tan&Cot, Sin&Cos, H, CI, C || D, Th, Sh1, Sh2 || CF and DF are folded at √ 10 Back scales: || LL1I, LL2I, LL3I, DF || CF, CIF, H, CI, C || D, LL3, LL2, LL1||
  Gauge Marks on scales: on front C scale has the mark R. On back p is on the DF scale.             Cursor Front and Back: has no marks.  
10 DING FENG (China) No. 5651   Scales were hard to read on eBAY, but seem similar to the one above with no ID No. eBay  
  Do not have a picture or manual for this slide rule. Hopp does not list it. Need complete information: listing of details of dimensions, physical appearance, scales, gauge marks,cursor lines, etc.      
11 DING FENG (China) No. 5810   25 cm; Plastic face on wood ;Cursor is not framed; Adjustable metal end brackets. R. H. &  
Front scales: || LL1I, LL2I, LL3I, DF || CF, CIF, H, CI, C || D, LL3, LL2, LL1|| CF and DF are folded at √ 10 Back scales: || Th, L, K, A || B, S&S, H', T&T, C || D, DI, Sh2, Sh1 || WKR  
  Gauge Marks on scales: p is on A, and B back scales; and C, D, and DF front scales; The marks 1 and R are on back scale C; unknown mark v is at 4.2 on K   Cursor Front and Back: has no marks.    
12 DING FENG (China) No. 5852   PVM  
  Do not have a picture or manual for this slide rule. Hopp does not list it. Need complete information: listing of details of dimensions, physical appearance, scales, gauge marks,cursor lines, etc.      
13 FLYING FISH (China) No. 1002     25 cm.; Plastic; Cursor is not framed. Has fixed plastic end brackets. R. H. &  
Front scales: || Ln1I, Ln2I, Ln3I, DF || CF, CIF, H2, H3, CI, C || D, Ln3, Ln2, Ln1|| CF is folded at √ 10 Back scales: || sh2, sh3, K, A || B, sin2cos2, H'2, tg2ctg2, tg3ctg3, C || D, DI, lg, th2 || WKR  
  Gauge Marks on scales: p is on A, B, C, D, and DF; p/4 is on A and B; 1 and R are on C and D; v on K. Cursor Front: Has KW at top middle; HP(**) is at right and p/4 left over the A & B scales. Cursor Back: has no marks.    
14 FLYING FISH (China) No. 1003   25 cm.; Plastic; Cursor is not framed. Has fixed plastic end brackets. R. H. &  
Front Scales: || lnI-2, lnI-1, lnI0, lnI1, DF || CF, CIF, H0, H1, H'0, CI, C || D, ln1, ln0, ln-1, ln-2 || CF is folded at √ 10 Back scales: || sho, sh1, cu1, cu2, cu3 || lq1-1, tgoctgo, tg1ctg1, tg2ctg2, sinocoso, srt-1cos-1ctg-1, C || WKR  
  Gauge Marks on scales: p is on C, D, and DF; v and s are on CI. (Variations exist with v, v1, and s on scale C) Cursor Front and Back: has no marks. Back scales (Continued): || D, sq2, sq1, tho, ch1 ||    
15 FLYING FISH (China) No. 1004   25 cm.; Plastic; Cursor is not framed. Has fixed plastic end brackets. R. H. &  
Front scales: || Th, Ch, K, A || B, T&T, ST&ST, S&S, C || D, DI, Sh2, Sh1 || CF and DF are folded at p Back scales: || LL01, LL02, LL03, DF || CF, CIF, L, CI, C || D, LL3, LL2, LL1|| WKR  
  Gauge Marks on scales: p is on A, B, C, D, CF, and DF; p/4 is on A and B; v is on K. Cursor Front: Has KW at top middle; HP(**) is at right and p/4 left over the A & B scales. Cursor Back: has no marks.    
16 FLYING FISH (China) No. 1009   25 cm.; Plastic; Cursor is not framed. Has fixed plastic end brackets. R. H. &  
Front scales: || Sh1, Sh2, K, A || B, T&T, ST, S&S, C || D, DI, P, Th || CF is folded at √ 10 Back scales: || LL01, LL02, LL03, DF || CF, CIF, L, CI, C || D, LL3, LL2, LL1|| WKR  
  Gauge Marks on scales: p is on A, B, C, D, and DF; p/4 is on A and B; v is on K. Cursor Front: Has KW at top middle; HP(**) is at right and p/4 on left over the A & B scales. Cursor Back: has no marks.    
17 FLYING FISH (China) No. 1015 and 1015-1   25 cm.; Plastic; Cursor is not framed. Has fixed plastic end brackets. WKR  
Front scales: || Sh1, Sh2, K, A || B, T&T, ST, S&S, C || D, DI, L, Th || CF is folded at √ 10 Back scales: || LL/1, LL/2, LL/3, DF || CF, CIF, H, CI, C || D, LL3, LL2, LL1||  
  Gauge Marks on scales: p is on A, B, C, D,and DF.     Cursor Front: p/4 on left and HP(**) on right over the A & B scales.     Cursor Back: has no marks.    
18 FLYING FISH (China) No. 1018 Electricians slide rule   Source: Hopp page 174 (See Shanghai China No. 1018) R. H. &  
Front Scales: || q, Rq, P', P || Q, QI, L, I || J, J', T, Gq || This has Gudermannian scales. Back Scales: || lnI-1, lnI0, lnI1, K1, A1 || B1, tgoctgo,sinocoso, C || D, DI, ln1, ln0, ln-1 || WKR  
  Gauge Marks on scales: p is on A1, B1, C, and D; p/4 is on A1 and B1; 1 and R are on scales C and D; 1/R is on B1 Cursor Front: has no marks. Cursor Back: p/4 on left and HP(**) on right over the A & B scales.    
19 FLYING FISH (China) No. 1200 (Pocket Slide Rule)   12.5 cm.; Plastic; Cursor is not framed. Has fixed plastic end brackets. R. H. &  
Front Scales: || lnI-1, lnI0, lnI1, DF || CF, CIF, sinocoso, H'0, CI, C || D, ln1, ln0, ln-1 || CF is folded at √ 10 Back scales: || sho, sh1, K, A || B, srt-1cos-1ctg-1, tgoctgo, tg1ctg1, tg2ctg2, C || D, lg-1, tho, ch1 || WKR  
  Gauge Marks on scales: p is on A, B, C, D, and DF; R is on front C and D; v is on on K Cursor Front: has KW at top middle and HP(**) at right , and p/4 on left over the A & B scales. Cursor Back: has no marks.    
20 FLYING FISH (China) No. 6006 Electrical Engineering Slide Rule 1960 25cm.; Plastic; Cursor is framed. Adjustable metal brackets. From  
Front Scales: || db, Neper, Volt, Dynamo, A || B, T&T, S&S, C || D, K, P, L || Back scales: || Sh1, Sh2, Th, Ch, DF || CF, CIF, CI, C || D, LL3, LL2, LL1 || Chinese  
Gauge Marks on scales: p is on A, B, C, D, and CI; p/4 is on A and B; C, 1, ', ", C1, and R are on scales C and D. There appear to be other marks that are unknown. Cursor Front: has three unknown marks. Internet  
  This slide rule was discovered on a Chinese Internet site. The pictures were clear enough to read the scales, but not clear enough to read all of the gauge marks on the scales and cursor. Cursor Back: has no marks. Site  
21 Gong Si He Ying (China) No Number (Called Rose Wood Slide Rule) 25cm.; Plastic face on wood ; Cursor is not framed. Adjustable metal brackets. Similar to K&E 4083-3 (1955-1961)  
Front scales: || LL02, LL03, DF || CF, CIF, CI, C || D, LL3, LL2|| Back scales: || Sh1, Sh2, Th, A || B, T&T, SRT, S&S || D, DI, LL01, LL1 || WKR  
  Gauge Marks on scales: p is on A, B, CF, and DF; p /4 is on A and B scales; The mark 1 is on scale SRT.         Cursor Front and Back: has no marks.    
22 HAIOU PAI (China) No. 6531   25cm.; Plastic; Cursor is not framed. Adjustable metal brackets. R. H.  
Front scales: || LL01, LL02, LL03, DF || CF, CIF, L, CI, C || D, LL3, LL2, LL1|| Back scales: || Th, K, A || B, T&T, ST, S&S, C || D, DI, Sh2, Sh1 ||  
Gauge Marks on scales: p is on A, B, C, D, CF, DF, CI, DI, and CIF.  
  Cursor Front: There is a mark on the right over the CF & DF scales for mutiplication of C and D by 36. Cursor Back: Has marks HP(**) at right , and p/4 on left over the A and B scales. On right over C and D scales is √ 4/p    
23 HAIOU PAI (China) No. 6631   PVM  
  Do not have a picture or manual for this slide rule. Hopp does not list it. Need complete information: listing of details of dimensions, physical appearance, scales, gauge marks,cursor lines, etc.      
24 HAIOU PAI (China) No. 6681 Haiou (Seagull)   25cm.; Plastic; Cursor is not framed. Has fixed plastic end brackets on one side only. R. H. &  
Front scales: || LL01, LL02, LL03, DF || CF, CIF, H, CI, C || D, LL3, LL2, LL1|| Back scales: || L, Sh1, Sh2, A || B, T&T, ST, S&S, C || D, P, Th, Ch || WKR  
Gauge Marks on scales: p is on A, B, C, D, CF, DF, CI, and CIF; ' and " are on ST.  
  Cursor Front: There is a mark on the right over the CF & DF scales for mutiplication of C and D by 36. Cursor Back: Has marks HP(**) at right , and p/4 on left over the A and B scales. On right over C and D scales is √ 4/p    
25 HANGZHOU JIANG or HANGZHOU JIANG SHI YI XING (China)   No Number See Jiang 25 cm.; Photo plastic face on wood; Cursor is not framed. Is not duplex; no scales or cursor on back side. R. H.  
This has same scales as JIANG 6171 (Pat. 129). Probably is same slide rule, but with different cursor. Cursor : Has two lines over C, D, CI, LL2, and LL3; with left line over 1, center line is over 1.19, and right line over 1.341.  
26 HUA FANG (China)     No Number       Need complete information with listing of details of scales, gauge marks and cursor lines. PVM  
27 JIANG (China) JIANGSHI type B No. 6171 PAT 129 Designed by Jiang Dequ 1940 25 cm.; Photo plastic face on wood; Cursor is framed. Is not duplex; no scales or cursor on back side. R. H. &  
Scales listed on left side: || LL1, CU, (T)&(T) || B, S&S, SH, CI, C || D, LL2, LL3|| Scales listed on right side: || LL1, L, CT || B, CS, TH, C || D, LL2, LL3|| See Hangzhou Jiang WKR  
Gauge Marks on scales: The marks r , and ' and " are on scales C and D.  
  Note: There are a number of various gauge marks, scale markings, and auxillary small scales used to calculate hyperbolic functions and other unknown values.     Cursor: Has no marks.    
28 Paper Slide Rule (CHINA) No Number and unknown Name   25 cm.; Paper face glued to wood ; Cursor is not framed; adjustable metal brackets. R. H. &  
Front scales: || L, LL1, DF || CF, CIF, CI, C || D, LL3, LL2|| Very crudely made - scales are all black color Back scales: || LL0, LL00, A || B, T, ST, S || D, Th, Sh2, Sh1|| Similar to early K&E 4083-3 (1939-1946) WKR  
  Gauge Marks on scales: p is on A, B, CF, and DF; p /4 is on A and B scales; The marks 1, ' and " are on scale ST.         Cursor Front and Back: has no marks.    
29 QUIFAN (CHINA) Rose Wood Slide Rule Has no Model No. ( QUIFAN Instrument Industrial Group).   See Gong Si He Ying on this list       WKR  
30 RUYI (Chinese Shanghai)   Model No. 1002     25 cm.; Plastic; Cursor is not framed. Has adjustable metal brackets.   Similar to Flying Fish 1002 R. H. &  
Front scales: || Ln1I, Ln2I, Ln3I, DF || CF, CIF, H2, H3, CI, C || D, Ln3, Ln2, Ln1|| CF is folded at √ 10 Back scales: || sh2, sh3, K, A || B, sin2cos2, H'2, tg2ctg2, tg3ctg3, C || D, DI, lg, th2 || WKR  
  Gauge Marks on scales: p is on A, B, C, D, and DF; p/4 is on A and B; 1 and R are on C and D; v on K. Cursor Front: Has KW at top middle; HP(**) is at right over the A & B scales. Cursor Back: has no marks.    
31 RUYI (Chinese Shanghai)   Model No. 1009                 Same as Flying Fish 1009 R. H.  
32 RUYI (Chinese Shanghai) Model No. 1015-1   25 cm.; Plastic; Cursor is not framed. Has fixed plastic end brackets. R. H. &  
Front scales: || LL/1, LL/2, LL/3, DF || CF, CIF, H, CI, C || D, LL3, LL2, LL1|| CF is folded at √ 10 Back scales: || Sh1, Sh2, K, A || B, T&T, ST, S&S, C || D, DI, L, Th || WKR  
  Gauge Marks on scales: p is on A, B, C, D, and DF.         Cursor Back: has marks HP(**) on right, and p/4 on left over A & B scales. Cursor Back: has no marks.  
33 RUYI (Chinese Shanghai) Model No. 1083   25 cm.; Plastic; Cursor is framed. Adjustable metal brackets. R. H. &  
Front scales: || L, LL1, DF || CF, CIF, CI, C || D, LL3, LL2|| CF and DF are folded at √ 10 Back scales: || LL0, LL00, A || B, T&T, ST, S&S || D, Th, Sh2, Sh1|| Similar to early K&E 4083-3 (1939-1946) WKR  
  Gauge Marks on scales: p is on A, B, CF and DF; marks 1, ' and " are on ST.             Cursor Front and Back: has no marks.    
34 RUYI (Chinese Shanghai) Model No. 6201   Seems to be the same as SIDA Model 6201 eBay  
  Do not have a picture or manual for this slide rule. Hopp does not list it. Need complete information: listing of details of dimensions, physical appearance, scales, gauge marks,cursor lines, etc.      
35 SHANGHAI (China)     Model No. 1002 There is no name on this slide rule, only the number 1002.   Seems to be the same as Flying Fish 1002 WKR  
36 SHANGHAI (China)     Electricians Slide Rule No. 1018   Source: Hopp page 218.   Same as Flying Fish 1018     WKR  
37 SHANGHAI (China) Model No. 5891     See listing under China Shanghai 5891 This has same scales as K&E 4083-3 (1955-1961) R. H.  
Front scales: || LL02, LL03, DF || CF, CIF, CI, C || D, LL3, LL2|| Back scales: || Sh1, Sh2, Th, A || B, T&T, SRT, S&S || D, DI, LL01, LL1 ||  
  Gauge Marks on scales: p is on CF and DF.                 Cursor Front and Back: has no marks.    
38 SIDA (China) Model No. 1   Source: Hopp page 218 25 cm.; Plastic, Cursor is not framed. Adjustable metal brackets. PMH  
Front scales: || L, LL1, DF || CF, CIF, CI, C || D, LL3, LL2|| Back scales: || LL0, LL00, A || B, T&T, ST, S&S || D, Th, Sh2, Sh1||  
  Need complete information with listing of details of scales, gauge marks and cursor lines.                      
39 SIDA (China) Model No. 1002   25 cm.; Plastic, Cursor is not framed. Adjustable metal brackets. Similar to Flying Fish & Ruyi 1002 R. H. &  
Front scales: || Ln1I, Ln2I, Ln3I, DF || CF, CIF, H2, H3, CI, C || D, Ln3, Ln2, Ln1|| CF is folded at √ 10 Back scales: || sh2, sh3, K, A || B, sin2cos2, H'2, tg2ctg2, tg3ctg3, C || D, DI, lg, th2 || WKR  
  Gauge Marks on scales: p is on A, B, C, D, and DF. Marks 1o and R are on back scales C and D; p/4 is on A and B; v is on K. Cursor Front: no lines. Cursor Back: has line HP(**) on right over A and B scales.  
40 SIDA (China)     Model No. 1009     Same as Flying Fish 1009           R. H.
41 SIDA (China) Model No. 1012   PVM  
  Do not have a picture or manual for this slide rule. Hopp does not list it. Need complete information: listing of details of dimensions, physical appearance, scales, gauge marks,cursor lines, etc.      
42 SIDA (China) Model No. 1015   25 cm.; Plastic; Cursor is not framed. Has fixed plastic end brackets. PVM  
Front scales: || LL/1, LL/2, LL/3, DF || CF, CIF, H, CI, C || D, LL3, LL2, LL1|| CF is folded at √ 10 Back scales: || Sh2, Sh1, K, A || B, T&T, ST, S&S, C || D, DI, L, Th ||  
  Gauge Marks on scales: p is on A, B, C, D, and DF.                 Cursor Front and Back: has no marks.    
43 SIDA (China) Model No. 1015 - 1   PVM  
Front scales: || LL/1, LL/2, LL/3, DF || CF, CIF, H, CI, C || D, LL3, LL2, LL1|| CF is folded at √ 10 Back scales: || Sh2, Sh1, K, A || B, T&T, ST, S&S, C || D, DI, L, Th ||  
  Gauge Marks on scales: p is on A, B, C, D, and DF.           Cursor Front: no lines. Cursor Back: has marks HP(**) on right, and p/4 on left over A & B scales.  
44 SIDA (China) Model No. 1083   25 cm.; Plastic face on laminated wood; Cursor is framed. Adjustable metal brackets. R. H. &  
Front scales: || L, LL1, DF || CF, CIF, CI, C || D, LL3, LL2|| Back scales: || LL0, LL00, A || B, T&T, ST, S&S || D, Th, Sh2, Sh1|| Similar to early K&E 4083-3 (1939-1946) WKR  
  Gauge Marks on scales: p is on A, B, CF and DF; p/4 is on A & B; marks 1, ' and " are on ST.           Cursor Front and Back: has no marks.    
45 SIDA (China) Model No. 5810   25 cm; Plastic face on wood ;Cursor is not framed; Adjustable metal end brackets. R. H.  
Front scales: || LL1I, LL2I, LL3I, DF || CF, CIF, H, CI, C || D, LL3, LL2, LL1|| CF and DF are folded at √ 10 Back scales: || Th, L, K, A || B, S&S, H', T&T, C || D, DI, Sh2, Sh1 || Similar to Ding Feng 5810  
  Gauge Marks on scales: p is on A, B, C, D, and DF; 1o and R are on A, B, and C.             Cursor Front and Back: has no marks.    
46 SIDA (China) Model No. 6171   25 cm.; Plastic; Cursor is not framed. Adjustable metal brackets. PVM  
Front scales: || Ln1I, Ln2I, Ln3I, DF || CF, CIF, H2, H3, CI, C || D, Ln3, Ln2, Ln1|| CF is folded at √ 10 Back scales: || sh2, sh3, K, A || B, sin2cos2, H'2, tg2ctg2, tg3ctg3, C || D, DI, lg, th2 ||  
  Gauge Marks on scales: p is on A, B, C, D, and DF; 1o and R are on C&D.       Similar to SIDA 1002. Cursor Front: has HP(**) line on right. Cursor Back: has no lines    
47 SIDA (China) Model No. 6201   25 cm.; Plastic on laminated wood; Cursor is framed. Adjustable metal brackets. WKR  
Front scales: || L, K, A || B, T&T, ST, S&S, C || D, Sh2, Sh1, Th || Back scales: || LLo1, LLo2, LLo3, DF || CF, CIF, CI, C || D, LL3, LL2, LL1|| (See also RUYI 6201)  
  Gauge Marks on scales: p is on A, B, C, D, CI, CF and DF; p/4 is on A & B; c is on C; marks 1, ' and " are on ST         Cursor Front and Back: has no marks.    
48 XUESH (China) 6171 bachelor   PVM  
  Do not have a picture or manual for this slide rule. Hopp does not list it. Need complete information: listing of details of dimensions, physical appearance, scales, gauge marks,cursor lines, etc.      
49 XUESH (China) 6171   25 cm.; Plastic on laminated wood; Cursor is not framed. Adjustable metal brackets. R. H. &  
Front scales: || lgln1I, lgln2I, lgln3I, DF || CF, CIF, H1, H2, CI, C || D, lgln3, lgln2, lgln1|| CF is folded at √ 10 Back scales: || sh1, sh2, K, A || B, sin&sin, H1 tg1&tg1, tg2&tg2, C || D, DI, lg, th || WKR  
  Gauge Marks on scales: p is on A, B, C, D, and DF; p/4 is on A&B; 1o and R are on front C&D; v is on K; CF and DF are folded at √ 10 on right side.   Cursor Back: has HP(**) line on right.    
50 XUESHI (China) 1572-K3 (Maybe XUESH, see above)   25 cm.; Plastic on laminated wood; Cursor is framed. Adjustable metal brackets. R. H.  
Front scales: || LL02, LL03, DF || CF, CIF, CI, C || D, LL3, LL2 || Back scales: || Sh1, Sh2, Th, A || B, T, SRT, S || D, DI, LL01, LL1||  
  Gauge Marks on scales: p is on CF and DF.                 Cursor Front and Back: has no marks.    
 
NOTES :  
On this list the "Front" of the slide rule is where the Name and Number are most prominently displayed. The "Front Cursor" is also on this side. There are exceptions, such as where the name was on one side and the number on the  
other. On some, where we had a copy of the instruction manual available, it said what was Front and Back. Where there are two entries such as "S & S" it denotes there are Black and Red numbers on the same scale. This makes the scale  
actually two scales. Usually one being the complement of the other. As examples, in the case of "S & S" the degrees are shown as 10 80, and 70 20, etc. At least one rule has Black and Black complementary numbers. However, all scales  
are in black where we do not own or have a color picture of the slide rule.  
The CF and DF scales are all folded at p, unless noted that they are folded at 10, or other value.  
 
The values of the symbols and gauge marks on the slide rule scales and on the cursors are as follows: (Note: Do not be confused as some marks look similar, but can have different values).    
Note: Not all gauge marks could be identified. Instead, where a mark is unknown, a numerical value is shown.  
p = 3.14159  
p / 4 = 0.7854 This is to aid in finding the area of a circle by the formula; A = p D2 /4  
v = p/6 = 0.5236 This mark is on K scale and is used for calculating volume of sphere where V = (p/6) D3  
R or ρo or ρ = 180/p = 57.2958o (the degrees in one radian)  
M = 1 / p = 0. 3183, or 100 / p = 31.83  
C or C' = 4/p = 1.273  
c or C = (√ 4/p) = 1.128  
C1 = (√ 40/p) = 3.568  
Marks for small angle calculations are usually on ST and read on C: 1o = 1.745 * 10 -2 = p / 180 ; The sine of one minute is = 2.909 * 10 -4 ; the sine of one second is = 4.848 * 10 -6  
' or ρ' or 9' or δ' or ζ' or Q' = minutes in a radian = 3437.74 = (180 x 60)/p If the mark ' is = 1.970, it is = 206,265 * (180/p) / 60 = 1.97 * 10 5 ; Where, 206,265 = (180 x 60 x 60) / p  
" or ρ" or 9" or δ" or ζ" or Q" = seconds in a radian = 206,265 = (180 x 60x 60)/p If the mark is = 1.182, it is = 206,265 * (180/p) = 1.182 * 10 7 ; Where, 206,265 = (180 x 60 x 60) / p  
ρ" or δ2 or ζ2 or Q2 = seconds in a radian (French decimal system 400) = 636,620 = (200 x 100 x 100)/p  
KW or kW stands for Kilowatts. HP(*) stands for Horsepower in U.S. and Great Britain. HP(**) for Horsepower in Continental Europe.  
HP(*) (value for this mark is = 1.341). Conversions are: Kilowatts (KW) times 1.341= HP(*); Ergs per Second times 1.341 times 10-10 = HP(*).  
HP(**) (value for this mark is = 1.358) for HP metric.  
PS1 = factor is 1.33413  
PS2 = factor is 1.3599 (this is for HP metric)  
 
 
SOURCES OF INFORMATION AND ACKNOWLEDGEMENTS ( See far right hand margin on the listing for the source):    
eBay - from pictures and listings of slide rules on eBay.  
PMH - from Peter M. Hopp's, book, "SLIDE RULES Their History, Models, and Makers", Astragal Press, 1999.  
PVM - from Pierre Vander Meulen's article on "Hyperbolic Functions on Slide Rules and Civil Engineering Applications", Autumn 2001 issue of the "Slide Rule GAZETTE" (UK); and, from email pictures and information he furnished .  
R. H. - from the slide rule collection of Richard Smith Hughes .  
WKR - from the slide rule collection of William K. Robinson. For corrections and additions to the listing email: wrobinson62@cox.net  
 
 
COMMENTS: ON THE CHINESE SLIDE RULES WITH HYPERBOLIC SCALES:  
In the listing above there are duplicates because of the confusion of the different manufacturers names. Such as those under the names of CHINA SHANGHAI and SHANGHAI (China) that may not be manufacturers at all.  
There are many Chinese slide rules and we expect more will be found and added to the list as time goes by. Fortunately some of our confusion in how to list these has been lessened by Liu Qinglin, a slide rule collector and  
dealer, who lives in Beijing. He informed us that the SIDA company was formed in the 1930's. Then later in the 1960's united into the Shang Hai factory. He says slide rules listed as China Shanghai and Shanghai China  
are the same maker, and that Flying Fish and Ruyi are Trademarks.. Also, where the slide rule numbers are the same the scales are the same layout. For example, the Flying Fish 1015 slide rule is the same as the RUYI, SIDA,  
and Shanghai (SHANG HAI) rules with the same number of 1015. We know his comment to be true for some of the names, but as we only have a few of each of the various models for a cross-check it has not been verified.  
Also, this information only covers one manufacturer. What is the story about the other makers such as Ding Feng, Haiou Pai, Hangzhou, Hua Fang, Jang, Xuesh and unknown others? Who are they and where were they?  
This listing that is on the JOS Plus web site (of Chinese slide rules with hyperbolic scales (Vectors)) will be updated from time-to-time by Richard and myself as new information comes in.  
 
 
 
 
 
 
 
 
 
 
 
 
                                    #REF!