US943010A - Surface-gage for parallel lining. - Google Patents

Description

G. 0. DOST. SURFACE GAGE FOR PARALLEL LINING.

APPLIOATIOIT FILED SEPT.10, 1908.

Patented Dec. 14, 1909.

UNITED %TATE% PATENT FFTQE.

CARL or'ro nosr, or MAGDEBURG, GERMANY.

SURFACE-GAGE FOR, PARALLEL LININ G.

T 0 all whom it may concern:

Be it known that I, CARL OTTO Dos'r, a subject of the King of Prussia, and resident of Magdeburg, in the German Empire, have invented a new and useful Improvement in Surface-Gages for Parallel Lining, of which the following is a specification.

The said invention relates to surface gages having an angularly adjustable needle carried by an angularly adjustable standard or supporting rod; and consists in the construction and combination of parts hereinafter more particularly set forth and claimed. 4

In the accompanying drawings Figures 1 and 2 represent elevations of my improved surface gage taken at right angles to each other, the needle being horizontal; Fig. 3 represents a View similar to Fig. 2 (but without the standardadjusting devices) showing the needle adjusted to an inclined position; Fig. 4 represents a cross-section on the line A-B of Fig. 1; Fig. 5 represents a plan view of the surface gage in the position of Figs. 1 and 2; Fig. 6 represents a horizontal section approximately on line CD of Fig. 2; Fig. 7 represents a detail view of a modified form of the needleadjusting devices; Figs. 8 and 9 represent detail elevations, at right angles to each other, of another modified form of the same; and Fig. 10 represents a section on the line E F of Fig. 8.

The base plate, 3 of the gage, is provided with a raised integral lug r and an opening a: near the same. The upper part of said lug is formed into a bearing 1" for a short headed horizontal shaft or bolt 1), one end of which is reduced to receive a thumb nut 10, the other and headed end of said bolt or short shaft being extended to receive the pivot eye or collar 8 on the proximate end of the standard or supporting rod (Z, between the head of said bolt or shortshaft Q) and the said bearing 1". The side of said eye or collar 8 facing toward bearing r is provided with an annular series of teeth a, and the proximate face of said bearing, which is extended laterally as a fixed annulus 1*, is provided with a corresponding series of similar teeth, a, the teeth of each series being forced into the notches between the Specification of Letters Patent.

Application filed September 10, 1908.

Patented Dec. 1st, 190%.

Serial No. 452,410.

teeth of the other series, when the thumbnut to is turned to draw on the bolt 7). These teeth are slightly flattened or trun cated at the points, so that they will not necessarily at first reach the inner ends of the notches, in which case the attachment might be too loose after the parts have been slightly worn, or if one of them be unduly contracted or expanded in any way. The

teeth thus truncated may be forced by the action of said nut deeper into said notches, if too loose at first, thereby compensating for such wear or accidental change of form and insuring absolute tightness of fit between the parts 8 and r when clamped together. Of course these parts may readily be separated after loosening thumb nut w and slightly withdrawing bolt e. The collar or eye 8 is then turned in either direction on bolt or shaft 1; until it occupies the position desired, to hold the said standard vertically upward or downward, or horizontal, pointing to left or right, or inclined toward some intermediate point. The nut to is then tightened again, clamping said collar and standard in the position thus attained. The standard cl turns with said collar 5, unless a vertically downward presentation he required. In this case the standard (Z is separated from collar 8 by drawing the lower end of said standard out of a radial socket s of said collar, into which it is normally tightly fitted. The said collar is then turned until the said socket is presented vertically downward over opening 00 and in line therewith, and the proper end of the inverted standard is passed up through said opening 00 into said socket s. The base plate g of course prevents the adjustment of said standard to any inclined position of a small arc, of which said opening is the middle point; but said standard may be adjusted by the means stated to any other position whatever of the circle described by said socket in turning said collar or eye on said bolt.

A pointer or needle a is adjustable longitudinally on standard d and also angularly adjustable, to tip its point up or down. Said needle may therefore be held at any desired point corresponding to the diameter of a number of circles having the axis of shaft 1) as a center, and in addition its operative end may be presented vertically upward or downward, or horizontally to right or left, or at any intervening inclination. To effect the said adjustment lengthwise of the standard, I use two plates f and 72 vertically grooved in their inner faces to fit said standard, and clamping said standard detachably between them, as shown in Figs. 5 and 6. The outer plate f constitutes the head of a bolt or arm f at right angles to standard (Z and the other end of said arm or bolt is reduced and screwthreaded to receive a thumb-nut c, which operates to clamp said plates f and it against the standard (Z. Said arm or bolt passes through an opening in plate h, as indicated in Fig. 1. 011 said bolt, between said nut and plate 71, there are a washer n, a clamping disk 9, and a sleeve or collar Z), also the pointer or needle a, clamped between said disk and collar; and the pressure of said nut as it turns on said bolt for tightening the latter is, of course, transmitted through the said parts a, g, a and b to said plate h, while the reverse movement of the bolt through said nut draws the plate f against said standard. On turning said nut to loosen said plates 7 and h on said standard, the said plates and the arm and pointer may obviously be raised or lowered, as desired, and again tightened in position at any other point chosen on said standard.

The washer a does not turn, being provided with a flat face 1), which fits against a similarly flattened face 0 of a part of the arm or bolt This latter face is long enough to permit said washer to slide along the said shaft a sumcient distance for the proper action of said thumb nut, or for freeing the plates f and h after said nut is turned reversely.

The disk 9 and collar or sleeve Z) are ro tatable on bolt or arm 7. The grooves in their faces, which combine to receive the needle or pointer (Z, are straight, following the chord of an arc of the circle described by the peripheries of these two parts, clamping said pointer between them. \Vhen said disk is loosened from said collar or sleeve, the said needle may be moved longitudinally through them, adjusting the length of its operating end beyond said needle-clamping parts. Also the said collar and disk may then be turned on said bolt to vary the angular position of said needle or pointer. This operation, however, is inconvenient, chiefly because it involves loosening the grip on the standard, so that the arm f will slip down the same, unless held by hand with care, or otherwise supported. To avoid this inconvenience and facilitate the angular adjustment of said needle, I have provided said collar with a radially extending rigid arm I), holding a sleeve-form nut 2', which engages an adjusting screw 6 carried by bearings is (Fig. 6) of a supporting bracket 70, in the form of a broad inverted U, which is pivoted by an integral stud m, at its middle point, to the aforesaid plate 71.. This screw is provided with an integral winged head 6 for convenience of turning it, and at the other end with a nut e and washer 6 for securely holding it in any position to which it may be turned; The turning of this screw e, in one direction or the other, of course causes the sleeve nut 11 to travel accordingly along said screw, taking with it the arm 6 and turning the collar or sleeve b and washer a, so as to vary the angle made by said pointer with said arm. The pivotal attachment of the supporting bracket allows it and the adjusting screw 0 to yield precisely according to the degree of such adjustment, as shown in Fig. 8, and thus pre vents binding. This adjustment is easily elfected and leaves the plates f and h, the bolt f and nut 0 quite undisturbed, and the needle a is not loosened. The means of adjusting said pointer are, of course, capable of use, as shown in Fig. 3, without any means for adjusting the standard d, the latter being held permanently in one position.

The modification shown in Fig. 7 substitutes for the pivot stud m a projection m of bracket 70, said projection sliding in a slot h of plate h, these parts being sufficiently loose to prevent binding. The projection m slides up and down in the slot h, to allow for the change of inclination of arm 6' during and after adjustment, screw 6 remaining in its original position.

In the modification shown by Figs. 8, 9 and 10, the arm 5 is dispensed with and the sleeve or collar Z) is provided with peripheral worm teeth 5 engaged by a rotatable worm e operated by the head 0 in the same manner as screw 6, before described. In this construction the said worm has its hearings in an extension ]L2 of the plate h, and this extension also surrounds a part of collar 6, and serves as an external bearing, taking the strain partly from bolt or arm Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

In combination with the standard of a surface gage, a pair of grooved plates fitting thereon, an arm connected to one of said plates, and provided with screw threads and a nut for loosening or clamping the said plates on the said standard at will for vertical adjustment, a grooved collar and grooved disk adapted to turn on said arm and to be tightened or loosened by the same action of said nut which tightens the said plates on the standard, a needle held by said In testimony, that I claim the foregoing collar and disk, a supplemental adjusting as my invention, I have signed my name in 10.

screw, and a screw-threaded part, engaging presence of tWo Witnesses.

the latter and carried by said collar, in order that the action of said adjusting screw and CARL OTTO DOST screw threads may turn the said collar and Witnesses:

adjust the angular position of said needle, HENRY EYOTZ,

substantially as set forth, A. B. GREEN.

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