US75533A - Improvement in spirit-levels - Google Patents
Improvement in spirit-levels Download PDFInfo
- Publication number
- US75533A US75533A US75533DA US75533A US 75533 A US75533 A US 75533A US 75533D A US75533D A US 75533DA US 75533 A US75533 A US 75533A
- Authority
- US
- United States
- Prior art keywords
- ring
- spirit
- improvement
- levels
- bubble
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000011521 glass Substances 0.000 description 6
- 238000010276 construction Methods 0.000 description 4
- 230000023298 conjugation with cellular fusion Effects 0.000 description 2
- 238000007373 indentation Methods 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000000284 resting Effects 0.000 description 2
- 230000021037 unidirectional conjugation Effects 0.000 description 2
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C9/00—Measuring inclination, e.g. by clinometers, by levels
- G01C9/18—Measuring inclination, e.g. by clinometers, by levels by using liquids
- G01C9/24—Measuring inclination, e.g. by clinometers, by levels by using liquids in closed containers partially filled with liquid so as to leave a gas bubble
- G01C9/26—Details
- G01C9/28—Mountings
Definitions
- Figure 2 isaplan view of the same portion of said spirit-level.
- my invention consists in the construction and arrangement of portions of a spirit-level having a revolving bubble-case, whereby the bubble-glass may be put in adjustment with reference to the outer frame or base of the level, without're'moving the bubble-glass from its case; and which construction also obviates the necessity of anyparticular care in irst introducing and securing said bubbleLglass in its saidcasc; and' my said invention may be considered as an improvement upon the invention set forth and des Patent granted to me, September 17,1867, and numbered 68,961.
- a represents the socket or receptacle, into which is inserted and in which revolves or oseillates the ⁇ ring D, having therein the bubble-case@
- the ring a is perforated' on each side, tions having screw-threads cut therein, and the screws d at into'the said threadedperforations, their points e e protruding beyond the inner surface of the ring a, exactly opposite each other.
- the studs tz' which may be secured in place by any convenient and proper method,- and so placed that when the ring D is in place inits socket a, the studs z' z' shall be in the same vertical line with the screws or points c e'.
- the stud z" is bevelled upon that side which is towards the point e', and in such manner tht the bevelled surface ofthe stud z" shall be parallel to the outline of the cone e.
- the stud z' is set into the ring D, at a distance from the stud z",lequal t'o 'one-fourth of the whole circumference of thc ring D, and is likewise bevelled upon the side towards the point e, having the same bevelled inclination as the outline of the cone e, and they are so arranged that when the bubble-case C is in one position, the stud z" impinges against the cone or point e', audit', the bubble-case C or ring D be turned one-quarter of a revolution," the stud z' impinges against the cone or point e', as shown in redlines.
- a screw, '0, having a coni-A cal point, is turned linto a threaded perforation in the top of the frame B, its point protruding -beyond the inner surface of the ring a, and the spring c', having aslight indentation at the place where the point of the screw c impnges against it, is placed between the said screws c, and the' ring D,the ends of the said spring resting upon the outer surface of the ring D,. and thus causing more or less pressureto be exerted upon the ring D, as the'screw c is turned in or out..
Description
.gaat mit @met ffm? VTC). ALL WHOM IT MAY CONGERN:
lowing is a full, clear, and exact description thereof, reference being had to the accom `struction and operation.
`L. L. DAVIS, SPRINGFIELD, MASSACHUSETTS.
vLettersuPatent No. 75,533, @lated March 17,- 1868. i
IMPROVEMENT IN SPIRIT-LEVELS. g
@its tlgthnlt aferra tu in that Eaters ttmt mit mating gint nt tigt tame.
Be it known thatI, L. L. DAVIS, of Springfield, in
` the county' of Hampden, and Commonwealth of Massaf chusetts, have invented a new and useful Improvement in Spirit-Levels and I do hereby declare that the fol- Y panying drawings, making a part of thisV specification, and to the letters of reference marked thereon, in whichv Figure 1 is a side lelevation ot' that portion of a spirit-level to vwhich my invention is applied, and with part of the graduated ring broken away, to show the details of th e adjusting-arrangement.
Figure 2 isaplan view of the same portion of said spirit-level.
The nature of my invention consists in the construction and arrangement of portions of a spirit-level having a revolving bubble-case, whereby the bubble-glass may be put in adjustment with reference to the outer frame or base of the level, without're'moving the bubble-glass from its case; and which construction also obviates the necessity of anyparticular care in irst introducing and securing said bubbleLglass in its saidcasc; and' my said invention may be considered as an improvement upon the invention set forth and des Patent granted to me, September 17,1867, and numbered 68,961.
That others skilled in the art may be able to mak cribedl inA Letters VIn the drawings, a represents the socket or receptacle, into which is inserted and in which revolves or oseillates the `ring D, having therein the bubble-case@ The ring ais perforated' on each side, tions having screw-threads cut therein, and the screws d at into'the said threadedperforations, their points e e protruding beyond the inner surface of the ring a, exactly opposite each other. Into the ring D are placed the studs tz', which may be secured in place by any convenient and proper method,- and so placed that when the ring D is in place inits socket a, the studs z' z' shall be in the same vertical line with the screws or points c e'. The stud z" is bevelled upon that side which is towards the point e', and in such manner tht the bevelled surface ofthe stud z" shall be parallel to the outline of the cone e. The stud z' is set into the ring D, at a distance from the stud z",lequal t'o 'one-fourth of the whole circumference of thc ring D, and is likewise bevelled upon the side towards the point e, having the same bevelled inclination as the outline of the cone e, and they are so arranged that when the bubble-case C is in one position, the stud z" impinges against the cone or point e', audit', the bubble-case C or ring D be turned one-quarter of a revolution," the stud z' impinges against the cone or point e', as shown in redlines. A screw, '0, having a coni-A cal point, is turned linto a threaded perforation in the top of the frame B, its point protruding -beyond the inner surface of the ring a, and the spring c', having aslight indentation at the place where the point of the screw c impnges against it, is placed between the said screws c, and the' ring D,the ends of the said spring resting upon the outer surface of the ring D,. and thus causing more or less pressureto be exerted upon the ring D, as the'screw c is turned in or out.. v I Y The operation of my invention is as follows: If it is found upon-trial that the bnbble-glass is not in perfect adjustment with the base of the frame B', and it should be necessary to depress the side of the bubble-case C, the screw 0l is turned in, and the cone e', in its contact with the bevelled stud i', forces it downwards, which action elevates the other side, F, of the buhblecase C, and the screw d may be correspondingly turned out if desirable. The studs z'z" might be straight'instead of hevclled, as shown, and still be operative, butI prefer them bevelled, as they operate more perfectly, and with a greater degree of nicety.
I-Iaving thus described my invention, what I claim as new, and desire .to secure by Letters Patent, is-
In combination with the screws d d', having the' conical points e e', thc studs z'z", placed in the ring D,
which has a reciprocating rotary motion, all constructed and arranged substantially as herein described and set forth.
g L. L.- DAVIS. Witnesses:
J. P., BUCKLAND,
N. B. SMITH.
havingvthe conicalor tapered points e-e are turned e and use my invention, I will proceed to describe its consaid portare-
Publications (1)
Publication Number | Publication Date |
---|---|
US75533A true US75533A (en) | 1868-03-17 |
Family
ID=2145038
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US75533D Expired - Lifetime US75533A (en) | Improvement in spirit-levels |
Country Status (1)
Country | Link |
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US (1) | US75533A (en) |
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0
- US US75533D patent/US75533A/en not_active Expired - Lifetime
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