STANDARD - Survey Instrument Antique Center!

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212 Triaiigulatioii Transit- Theodolites. For use in Cities and in Bridge and Tunnel Construction, etc. Since the introduction by us in 1875 of this style Transit with Yoke standard frame cast in one piece and mounted directly on the top flange of the inner center, the demand for them in all lines of engineering requiring high accuracy lias attained so great a magnitude, on account of their excellence, as could not be foreseen at that time. Many of these instruments are in use in the survey and triangulation of our largest cities, and are giving great satisfaction. Many also have been supplied to Colleges and are in use in State and Boundary Line surveys. The great lateral stiffness attained by this form of standard frame enables to make the trunnions of the telescope's axis cylindrical and to mount them in wye-bearings, thereby securing to the telescope the most .accurate movement in the vertical plane known. The telescope reverses through the standards as usual and over the bearings. The trunnions are protected by dust-caps, and wherever possible capstan-headed screws will take up any looseness between these dust-caps and the trunnions. These Transit-Theodolites are made with three or four leveling screws. No. 11. Plain Transit-Theodolite, with four leveling screws, as in cut, on opposite page, but without level, clamp and tangent screw, vertical arc, or striding level to telescope ; in all other respects as in cut of No. 1 Ic. Specifications : horizontal circle 6 finches, single opposite verniers, as in fig. 5 page 38, reading to 2O", glass protected graduation and verniers, one row of figures to 360 clockwise 12-inch ; inverting' telescope, aperture 1^ inch, power 28 diameters, achromatic eyepiece ; telescope is reversible over the bearings, as well as through the standards ; long compound centers of hard bell-metal ; shifting center ; splitleg tripod; aluminum standard frame leather-finished; mahogany box with screw-driver, reading glass, adjusting pins, etc. Code word, Mobax Made to order only. If instrument is desired with an erecting telescope of 24 diameters, add to code word "erect." \Veight of instrument, about 14 Ibs. Weight of tripod, about 10 Ibs. Gross weight packed in two boxes, ready for shipment, about 60 Ibs. Price of Plain Transit-Theodolite No. 11, as above, with four leveling screws $225.OO Extras to Plain Transit- Theodolite No. 11. Three leveling screAvs with shifting: center (see page 52) . . - .15.00 7-inch horizontal circle reading to 10" by single opposite verniers, single row of figures to 360 clockwise Heading; glasses to horizontal circle (should always be ordered with instrument reading 30.00 to 10") Reversible clamp and tangent screw to telescope, but without level to 15.00 latter 15.00 6-inch spirit level with reversible clamp and tangent screw to telescope . 30.00 3-inch striding level, as in cut, to rest on special collars to revolve through the standards 20.00 5-inch striding level resting at points of contact in wyes, see page 214 . 30.00 5-inch vertical arc, as in cut on opposite page ....... 20.00 5-inch full vertical circle, (as in cut page 214) but with only one double vernier reading to minutes at eye-end reversible ; tangent screw . . 45.00 5-inch vertical circle, see cut page 214, double opposite verniers reading to minutes, reversible tangent screw ........ 50.00 3-inch level to vernier frame of vertical circle, see cut . page 214 . . 8.00 Two reading glasses to vertical circle, see cut page 214 . . =10.00 Stadia wires, fixed, ratio 1:100 .... . 3.00 Gradi enter screw . . . . . . . . . . 5.00 <strong>Center</strong> of instrument of steel running in a socket of cast iron, for instrument with three leveling screws, having no compass Oblong compass mounted on vernier plate at side of standard, with motion for setting off the variation (three-inch needle reads only a few degrees each way from zero) [For instruments with bell-metal centers only] ...., . 20.00 15.00
213 No. 11C, Complete Transit-Theodolite with four leveling screws, (size and particulars as described in Plain Transit-Theodolite No. 1 1 ) but with level, clamp, and tangent screw, 5-inch vertical arc, striding- level, and fixed stadia wires to telescope, as shown above. Made to order only. Code word, Mobaya. Price, $3OO For Extras see list of Extras to Transit-Theodolite No. 11.
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ENGIN. LIBRARY UC-NRLF STANDARD INS
Page 9 and 10:
PREFACE. THE instruments enumerated
Page 11 and 12:
DESCRIPTION OP THE Essential Featur
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Tangent Screws. These are made of A
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The Finish. It is a well-known fact
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11 whatever. As a rule more harm th
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13 has sufficiently developed to im
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15 ordinary instruments, but it mus
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17 frame, and apply another drop of
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19 The finer and finest classes of
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21 applied with an adjusting pin ab
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23 adjustment of the telescope in t
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25 Owing to the many improvements m
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27 Engineers 9 Instruments and Thei
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ITrfpodfead 2 // Bolt 3 // >/ Mf J
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In practice, however, many engineer
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34 The Pancratic, or Changeable Pow
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the 130 division, and moved on unti
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38 Graduation Reading to 2O". A 15
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Decimal Vernier Graduation. For rai
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HORIZONTAL CIRCLE HORIZONTAL CIRCLE
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44 line of collimation of the teles
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46 Obviously then, the number of wh
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48 Gradienter Screw Table I. Factor
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50 The subjoined table affords a re
Page 58 and 59:
52 Plumbing and Centering Arrangeme
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54 To make the adjustment for Paral
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56 capstan-headed screw at left to
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58 To adjust the line of collimatio
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62 The Adjustment of the Wye Level.
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On slightly rising ground locate fo
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(5.) Astronomical Triangle. The hei
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68 From the -(- sign of the " diffe
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70 Degree of Precision Required. (1
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72 tions for refraction, using the
Page 80 and 81:
74 Correction to the Mean Refractio
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76 Table H. Coefficients showing th
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78 To Find the Meridian from " Pola
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80 REMARKS. If the instrument is no
Page 88 and 89:
82 These devices are being more and
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84 c. Directions. For finding the S
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6. Directions. For reducing the nor
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88 On Stadia Measurement. Written e
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90 included between this and the ot
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92 Jug, R, of the rod AB is the dif
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94 gent screw of the main telescope
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96 zero when plates are leveled up
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i I * 2 I! all 35 e 5c u fcc - = H
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100 Berger Short Focus Lenses. A se
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102 NOTE. In selecting instruments
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RIBBING PARTS OF INSTRUMENTS. Patro
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The Berber Complete Engineers' and
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[Patented) The Berber Complete Mine
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11(5 5 O o to tO u tO CM in in in o
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118 n ai in Spirit Levels. For the
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l, 33 120
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122
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14 124 C. L,. BEKGEK & SONS. BOSTON
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1 5" AND 1 7|" C. t. BKKGER & SONS.
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C. 1-28 BEKGEU & SONS. Monitor Type
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130 The Berger 18 MONITOR TYPE WYE
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1 18 132 C. I*. BERGER & SONS, BOST
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18 134 II ENGINEERS' WYE LEVEL. lev
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136 18" HYDROGRAPHER'S WYE LEVEL Ha
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138 Reversion Level. Applicable to
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140 The Telescope will be invariabl
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142 THE GEODETIC LEVEL. In response
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144 COAST SURVEY PRECISE LEVEL The
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146 PLANE TABLE This instrument, as
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61" 150 ENGINEERS' AND SURVEYORS' T
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No. 1 a. 6 1 4 in. at edge of gradu
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No. I a. T 4 in. at edge of graduat
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No. 1 c. 154 C. L. BERGER & SO>S in
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No. 1 c, Style p. in. at edge of jr
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. 1 f. is made by C. L. Berger & So
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160 C. L. BEKGEK & SONS. MONITOR TY
Page 168 and 169: 162 64 SURVEYORS' TRANSIT No. 1 s.
Page 170 and 171: 5^" 164 C. L. BERGER & SONS, BOSTON
Page 172 and 173: 166 C. L. BERGER & SONS. BOSTON 5|"
Page 174 and 175: 5|" 168 ENGINEERS' AND SURVEYORS' T
Page 176 and 177: The Surveyors' Solar Attachment. Pl
Page 178 and 179: 172 The Berger Solar Attachment Att
Page 180 and 181: 174 Davis' Patent Solar Attachment.
Page 182 and 183: 176 THE 5|" MOUNTAIN TRANSIT. This
Page 184 and 185: 178 The 41" Mountain and Mining: Tr
Page 186 and 187: 4|" 180 C. L,. BERGER & SONS. BOSTO
Page 188 and 189: 182 The 4" Mountain, Mining and Rec
Page 190 and 191: 184 The 4" Complete Transit- Theodo
Page 192 and 193: 186 4>4 " Complete Mine Transit No.
Page 194 and 195: ^ 188 t4 Mining Transits. All of th
Page 196 and 197: The 190 See M Fig. 1. Berger Patent
Page 198 and 199: 03 192 Complete Mining Transit No.
Page 200 and 201: |S go Complete Wet-Mine Transit No.
Page 202 and 203: 196 Different Types of Vertical Arc
Page 204 and 205: :i98 Edge G-racl nation for Vertica
Page 206 and 207: The Open-Frame Protected Vertical C
Page 208 and 209: 202 C. L. BEKGKK & SONS. Flexible J
Page 210 and 211: S fa 204 Style of trivets used with
Page 212 and 213: 200 Patented. The Lateral Adjuster
Page 214 and 215: Mining Transit. Interchangeable wit
Page 216 and 217: 210 Tunnel Transits. Xo. 1C a Tunne
Page 220 and 221: No. lib. 214 Complete Double Opposi
Page 222 and 223: 210 No. 11 m. 7-iiich Complete Tran
Page 224 and 225: 218 No. llg, 7-inch Complete Triang
Page 226 and 227: 220 No. 12. 8-iiich Transit for Tri
Page 228 and 229: SPECIFICATIONS : No. 15 Alt-Azimuth
Page 230 and 231: No. 15 b. Alt.-Azimuth. 224 Alt. -A
Page 232 and 233: Portable Transit Instrument for Lat
Page 234 and 235: 228 Reflecting Circle. Artificial H
Page 236 and 237: 230 Current Meters, The types of cu
Page 238 and 239: 232 Current Meters No. V and VI, As
Page 240 and 241: 234 Plain Polar Plaiiimeter. This P
Page 242 and 243: 236 Leveling Rods No. 145 No. 147 N
Page 244 and 245: Paine's Steel Tape Measures. & inch
Page 246 and 247: 240 Surveyors' Chain Tapes. Heavy J
Page 248 and 249: 2-12 Standard Steel Tape Measures.
Page 250 and 251: No. 210. Plummet Lamp. tfo. 212. 24
Page 252 and 253: 246 Portable Anemometers. These ins
Page 254 and 255: PRICES SUBJECT TO CHANGE WITHOUT NO
Page 256 and 257: J Tripod Head 2 // Bolt 3 * .* Nut
Page 258 and 259: Levels, Locke's Hand Reversion Revo
Page 260 and 261: C. Li. Berger & Sons' Bevel-Limb Tr
Page 262 and 263: 0) O (^ c CL 0? Z O (0 O K lu ffi C
Page 264 and 265: O CO K III III These prices do not
Page 266 and 267: ord (In whether . 4 O ~ bJD p,"* 3,
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a -iQ. Q u u o 0) o 0) U O U CO o C
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These prices do not include bag (SI
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Q III o o z o u o o U Ott bl CD O U
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o O (0 ui y O J O Q. O U 5> OC os .
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800290 I A 33012 Engineeringlibrary
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STANDARD - Survey Instrument Antique Center!

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