US1539422A - Combination tool - Google Patents

Combination tool Download PDF


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US1539422A US437188A US43718821A US1539422A US 1539422 A US1539422 A US 1539422A US 437188 A US437188 A US 437188A US 43718821 A US43718821 A US 43718821A US 1539422 A US1539422 A US 1539422A
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John E Lundquist
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John E Lundquist
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    • G01B3/00Measuring instruments characterised by the use of mechanical techniques


May 26, 1925. 7 1,539,422
J. E. LUNDVQUIST v COMBINATION TOOL Filed Jan. 14, 1921 2 Sheets-Sheet 1 1,539,422 Q J. E. LUNDQUIST- I COMBINATION TOOL- Filed Jan. 14, 1921 munlll jzdeizfoz (257m. fizz/wag? 2 Sheets-$heet 2 Fatented May 26, 1925.
JOHN E. nuunours'r, orcrrrcneo, rumors.
Application filed January 14, 1921. Serial No. 437,188.
To all whom it may concern:
Be it known that I, JOHN E. LUND UIs'r, a citizenof the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Combination Tools, of whichthe following is a specification.
The invention relates to combination tools, and more particularly to hand instruments having special utility in measuring, ing andlaying out Work in the mechanical crafts.
The invention consists of a novel con= struction and combination of parts so ranged and inscribed as to be useful to machinists, draftsmen, and all metal and wood workers.
Its object is to provide a light, compact instrument, capable of being readily adjusted and conveniently carried, which comprises a minimum number of integral parts adapted to a large variety of uses, and which is of simple construction so that it may be cheaply manufactured.
In the drawings, Figure 1 is a view of one side of the device with its arms partially open. Figure 2 is a view of the reverseside with the arms in a different partially open position. Figure 3 represents the instrument with its arms extended. Figure 4; is a side view in extended position.
The device comprises dividers, outside calipers, inside calipers, center gauge, screw cutting tool gauge, stationary left hand square, stationary right hand square, combination angle square, protractor, wire gauge, hook rule, 8 rule graduated in thirty-seconds of an inch reading to left and to right, rule graduated in sixty-fourths of an inch, rule graduated in hundredths of an inch, metric rule, scale for screw threads, and inscribed tables of useful purpose. V
The device is constructed with two main parts, designated in the drawings as 1 and 2, pivotally joined by the pivot bolt 3. Each of the parts 1 and 2 is formed of flat material, preferably sheet metal, with a semi-circular center portion 4 from which extends a plurality of integral projections shaped suitably to the several functions of the tool. Thus, elongated radial blades 10 and 12 terminate in pointed ends 14 and 16 forming a pair of dividers. Oppositely from said blades of the dividers the radial guaglegs 18 and 20 are extended having oppositely curved ends In the position. represented in Fig. 1 thelegs 13 and 20 formoutside calipers, while in theposition illustrated in Fig. 2 they form inside calipers, the change being accomplished merely by swinging the parts 1 and 2 from the, position shown in Fig. 1 together andv then apart again but 7 into. reverse angular relation. Protractor scales. 22 and 26 are provided by inscription on the center portion 4 of part 2' (Fig. 2)- which scales are appropriatelyv divided for use in calipering. The scale 22 is read in connection with an indicator point 2 1 formed on the center portion 4: of part 1 when calipering inside dimensions, and the scale 26 is used in connection with a point 28 when caliper-mg outside surfaces.
A lateral projection 30 is formed-on part 2, and has its endnotched at 32 to form a standard angle center gauge suitable to, gauge the grinding oflathe centers. Along; itsv edges on both faces of the projection 30 are inscribed scales 34, 3 1 3 1? and 34 for measuring the number ofscrew-threads to an inch. Oppositely disposed on part 1- is a projection 36 having the edges of its pointed end forming the same angle as formed by the notch 32, thus serving as a gauge for the counter bore in work to be centered in a lathe. The projection 36 may also be 'used as a depth gauge'as the extent to which its pointed end maybe entered in a counterbore, for example, will obviously give an indication of the depth of the latter, The notches 38 form standard angles convenient for gauging the grinding of screw cutting tools. Any useful table of mechan-. ical data may beinscribed on the faces of the projection 36, in the present case a table of tap drill sizes is indicated at 10 (Fig. 1).
The outer edges of the projections 30 and 36'for1n right angles at 42 and 44 with the intersecting edges of the blades 12 and 10 respectively. With respect to the scales inscribed on the blades, there are thus provided a left hand square and a right hand square. relation illustrated in Fig. 1, it will be observed that the inner edges of the blades 10 and 12 intersect, and that by swinging the blades on their common pivot any desired angular relation between them may be obtained. The blades may be secured in 1th the parts 1 and 2 in the of part 1, by which the degrees of angular separation of the blades and 12 maybe read as indicated at the point 48 which 1s formed on part 2 and passes over the are as the blades are moved on their pivot. By
this means the instrument is adapted to be used as a protractor. V
The curved edges of the center portions 4 of the main parts are provided with openings 50, which form a metal and wire gauge.
On the adjoining surface on the center portion of one of the parts is inscribed a table of wire sizes, 51 (Fig. 2).
A hook 52 is mounted on the blade 12 by means of a pivot stud 54, and may be swung into or out of operative position about its pivot. As illustrated in Fig. 1 and Fig. 3, the projecting hook and the blade 12 form a convenient hook rule. Preferably a slight projection 52 is provided on the part 2 to form a stop to resist the swinging movement of the hook. This projection is so located that it serves to hold the hook either in its operative or inoperative position. The hook,
' it will be seen, is mounted so that its free end may be engaged by the fingers to spring the same over the projection 52. Thus the hook is held yieldingly by the projection against pivotal movement.
It is apparent that the faces of the instrument, particularly of the blades 10 and 12 maybe inscribed with any desired graduated scales and tables the present embodiment' the'blade lOis inscribed on one surface to form on one edge a rule 56 graduated to sixty-fourths of an inch and on the opposite edge a rule 58 graduated to onehundredths of an inch. Both edges of one surface of blade 12 are inscribed for use as "metric rules 60 and 61;
' the opposite surfaces of the blades 10 and 12, and along the continuous straight edges of the central portions, the scales 62, graduated to thirty-seconds of an inch, are
- inscribed. By swinging the two blades into position oppositely from their pivot, with their outer edges forming a straight line (Fig. 3), the scales 62 form a continuous 8 inch rule, and are inscribed to be read to the right. or left.
.Itis apparent from the description that the invention provides a great variety of useful tools combined in one simple implement convenient to use and carry, and that 7 tion with considerable particularity, it will be understood that I do not intend to be limited in the interpretation of the appended claims to the construction and'arrangement set forth, except as may be necessitated by the state of the prior art. I
I claim as my invention:
1. A combination tool having, in combi'- nation, two fiat body members disposed in overlapping relation, a-stud connecting said members for relative pivotal'movement, a; blade element on eachof said members extending radially from said stud and having a curved outer end, said blade elements hav ing their curved ends disposed either toward or away from each other according to selected positions of said members, there bein two arcuate scales arranged on one of sai members concentric with said stud, and two indicatorpoints on the other member, one
registering with one of said scales when said curved ends are disposed toward, each otherforming a continuous straight edge when said elements are rotated into alinement,
there being a graduated scale along op'po-v site longitudinal edges ofsaid elements, the scales on one longitudinal edge of each of said elements being adapted to read continuously along said straight edge.
In testimony whereof, I have hereunto set 1'05 my hand. i
US437188A 1921-01-14 1921-01-14 Combination tool Expired - Lifetime US1539422A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3114977A (en) * 1963-01-15 1963-12-24 Modin John Multi-purpose instrument
US3145478A (en) * 1962-05-16 1964-08-25 Charles A Leach Scriber
US4535542A (en) * 1983-10-24 1985-08-20 Liu Bao Shen Vernier gauge

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3145478A (en) * 1962-05-16 1964-08-25 Charles A Leach Scriber
US3114977A (en) * 1963-01-15 1963-12-24 Modin John Multi-purpose instrument
US4535542A (en) * 1983-10-24 1985-08-20 Liu Bao Shen Vernier gauge

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