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200 Patented. The Lateral Adjuster screwed to a Trivet For Transits with FOUR leveling screws. For use in Tunnels and Underground Work of all kinds; also useful in tlie erection of long Bridges, Factories and their machinery equipment, etc. For Prices and Particulars of tliese auxiliariessee pages 2O4 and 2O5.
207 The Berger Tunnel Tripod Patented \vitli <strong>Center</strong>ing: ami Aligning Device for moving Transit with three leveling screws under ov above a given point or onto a given line see cut of No. 1O b. The above tripod has been designed to facilitate the placing of our Transits with three leveling screws in the axis of a tunnel or onto a given line of sight. 1-or this reason, in addition to our centering device, a lateral motion lias been provided, which allows the Transit to be moved with ease and precision and without disturbing the position of the level bubbles mentioned in describing the Lateral Adjuster for transits with FOUR leveling screws, page 205. This centering and aligning device is very simple to manipulate, but increases the weight of the tripod-head, particularly when the latter is wholly made of brass Thus the tripod-head for si/e No. 1 and No. 11 Transits is heavier by about 2% to 3 Ibs., that for No. 2 about 2 to 2% Ibs., and for No. 4 about \ l/2 to 2 Ibs., and in the case of No. 1O and 12 about 5 Ibs. TO USE. First place the uppermost triangular shifting piece, upon which the instrument rests, in the center of its motion, which is indicated by equal spaces all around it, and also place the lateral adjuster, which is the lower slide, in the center of its range, indicated by two small projections on the tripod head and S!OAV motion piece of the lateral adjuster. Then place the tripod head in such a position that the motion of the Lateral Adjuster is about at right angles to the line of sight; after which level up, and center over or below the given point; then clamp the large winged central nut in the usual manner and apply a slight pressure by turning milled headed nut which acts against the spring of the instrument fastener. The instrument is now ready for angle work. TO USE THE LATERAL ADJUSTER FOR ALIGNMENT. Clamp the milled headed screAV on top, bearing in mind that, in order to enable the feed screw to move the instrument during this lateral motion, loth the large iringed central clamping nut on top of tripod and fastener spring below must first, be released. 'Inasmuch as the pitch of the feed screw corresponds to tenths of a foot, each motion of a tooth of the star indicating wheel corresponds to a thousandth of a foot. Thus it will be seen that if the pointing of the telescope on a distant scale requires the instrument to be moved I/ 1000th or 5/1000ths of a foot, as the case may be, that the manipulator turns 1 or 5 teeth around the index mark and the object will be attained. When the line of sight of the telescope is in the given line in the tunnel then slightly clamp the large winged central clamping nut on toi> of tripod and a^ain slightly apply the .spring of the instrument fastener. If in the course of operations the line of sight must be moved laterally, then the central clamping nut and spring nut must again be first slightly released from the shifting piece before any lateral motion should be attempted. To use the tripod head as a trivet, unscrew the extension legs and screw the three 4-inch iron legs in the places assigned them. It can then be used on brackets or any other special device rigged up to receive it in the axis of the tunnel. To obviate the removing of the legs so that attachment can he used as a trivet, a special tripod head, having centering and lateral adjuster devices, but without wooden legs, may be ordered. This extra head complete would have the three 4-inch iron legs heretofore mentioned. After the Lateral Adjuster has been used, before putting it away, it will be well to clean it, placing the triangular shifting piece, as well as the lower slow motion slide of the Lateral Adjuster, again in a normal position, and then clamp both by the central clamping nut and small knurled nut. The tripod is made with fine mechanical nicety and should be well taken care of in order to preserve it in good condition. This device (for instruments with THREE leveling screws only) is made in four sizes as follows : For Transits No. 1, 5 and 11, .... Code Name Topoltuni " Transits No. 2, 3 and " " (>,.... Topomara " Transit No. 4 " Toponia " Transits No. 1O and 12 Toposmus The price of this lateral adjuster over the regular centering device furnished with our transit tripods will be given upon application.
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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
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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
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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
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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
Page 162 and 163: No. 1 c, Style p. in. at edge of jr
Page 164 and 165: . 1 f. is made by C. L. Berger & So
Page 166 and 167: 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 214 and 215: Mining Transit. Interchangeable wit
Page 216 and 217: 210 Tunnel Transits. Xo. 1C a Tunne
Page 218 and 219: 212 Triaiigulatioii Transit- Theodo
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
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0) O (^ c CL 0? Z O (0 O K lu ffi C
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O CO K III III These prices do not
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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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