Патент USA US2412489код для вставки
Dec. 10, 1946. 2,412,489 H. BIEG SPOT GAUGE _ Filed May 5, 1944 BY /47‘ TUR/Vey 2,412,489 Patented Dec. l0, _ 1946 ATENT QFFICE UNITED STATES 2,412,489 SPOT GAUGE, Herman Bieg, St. Louis, Mo. Application May 5, 1944, Serial No. 534,191 i claim. (Cl. 33--189) i This invention relates to spot gauges, its prin cipal object being to produce such a gauge that will enable the operator to spot material for doweling or other purposes with absolute ac curacy. While there are a number of spot gauges in use, none, so far as I am aware, is absolutely reliable. For instance, in spotting wood for doweling it sometimes happens that the point of the gauge will strike a knot in the wood, or per- » 2 vertical member 2 is adapted to lie against the vertical side of said wood, and both members I and 2 are of such width as to oi‘r‘er substantial contact with the wood, so that they may be heid nrmly in place. A facing 5 is secured to the inner face of the member 2 which contacts the wood, and at its center portion a section of the facing 5 is cut away for a purpose which will be explained later. At the center oí the member 2 a rectangular aperture 6 is provided, and slightly to one side of the aperture 5 a longitudinal slot 'I is cut into said member 2. A graduated scale 3 is vertically mounted upon the outer face of the member 2 slightly to one side of the slot “I haps will strike just at the edge of a knot, and in this event the point will be slightly deñected and the accuracy of the spotting will be impaired. My gauge overcomes this hazard entirely. Another object of my gauge is that it oiïers sufficient surface for contact with the surface to 15 (Fig. 3). In the cut-out portion of the facing 5 above be spotted to enable the operator to hold it rlrmly referred to, a section 9 of similar material is in place against accidental tilting or slippage, mounted for sliding up and down movement, so which further increases the accuracy of the spot that the section Q is visible through ‘the aperture ting. Another important feature of my device is that its construction permits far greater speed 20 ii and through the slot l, and an indicator Ill is mounted upon said slidable section 9 in such in spotting than is possible with the gauges here a manner that it projects through the slot îI, the tofore in use. indicator IB being formed so that it extends over For the sake of simplicity I will describe my the scale 8, and it is obvious that as the section gauge in this specification as used in spotting S moves up or down the indicator moves with it wood for doweling, but it is to be understood over the scale 8. that it could be used with equal success in marl; A forwardly extending tubular member Ii is ing other materials, or for other purposes than mounted upon the section 9, and a plunger I2 ex doweling, without departing from the spirit of the tends through said tubular member l! for for invention. Fig. 1 is a plan view of my gauge as it appears 30 ward and backward movement, the forward end of said plunger being provided with a knob K for when in place on a piece of wood that is to be easy manipulation, and at the opposite end vof spotted. the plunger a sharp-pointed element I3 is rigidly Fig. 2 is a side elevation of my gauge in place secured thereto so that the sharp point I3' pro for the spotting operation. trudes rearwardly through an aperture in the Fig. 3 is a front view taken on line 3_3, Fig. 1, sliding section 9 when the plunger I2 is pushed illustrating particularly the vertical spotting all the way back. A sleeve Iâ surrounds the scale. tubular member II, and the sleeve I6 is bisected Fig. 4 is an enlarged sectional view taken on by means of a curving cut as shown at I5. The line 4_4, Fig. 1. Fig. 5 is an enlarged sectional view taken on 40 forward portion of the sleeve Ill is rigidly se cured to the tubular member Il, but the rear line 5_5, Fig. 4. ward portion of said sleeve is mounted for rotat My spot gauge comprises a horizontal member ing movement about said tubular member. The I and a vertical member 2, the members I and sleeve I4 extends rearwardly to a point just short 2 preferably being formed integrally of a single piece of any suitable material which forms a right 45 of the vertical member 2, and an apertured disk I6 is inserted between said member 2 and the angle at 3. The member I is substantially T sleeve so that the plunger may be pushed rear shaped (Fig. 1), and near its bent edge 3 and at wardly through said disk, since the aperture in the center of the transverse arms of the T the disk IIS and the above-mentioned aperture in shaped member I a diamond-shaped aperture fl is provided for a purpose to be hereinafter set 50 the sliding member 9 are in registration with each other. The purpose of the disk I5 is to offer forth. more contact surface between the sleeve I4 and As has been said, the members I and 2 are at the vertical member 2, and it is not rigidly secured right angles to each other, so that the member to either of the last-mentioned elements. An I is adapted to lie upon the upper surface of a piece of wood to be spotted for doweling and the 55 apertured disk I1 is rigidly mounted upon the 2,412,489 3 rotatable portion of the sleeve I4, and this disk I ‘I is of such size that it may be conveniently grasped by the operator. In use the procedure is as follows: A piece of wood W is to be spotted for doweling. First the operator spaces on“, probably with lead pencil lines I8, the distances at which the dowel pins are to be inserted. I-Ie then lays the gauge upon the wood surface above the ñrst of the lead pencil marks so that the pencil mark comes exactly at 4 The camming action of the curved out I5 holds the indicator securely in position, so all that the operator needs to do if he wants to mark the wood for a series of dowel pins is to move the gauge along from one pencil mark to the next, being careful each time to see that the pencil mark comes exactly at the acute angles of the aperture 4, and then strike a blow on the knob K, and all his marks will be in exact alinement, and it will be seen that this operation can be the acute angles of the diamond-shaped aperture performed with great rapidity. 4 in the T-shaped member I. The operator When this operation has been completed and knows at what depth from the top of the wood it is desired to set the indicator at another depth, he wishes to insert the dowel pins. It will be it is only necessary to release the camming action remembered that the indicator II] is slidable up 15 by turning the disk I1, when the above procedure and down with the sliding member 9, and the can be repeated. operator now sets the indicator at exactly the While I have shown the aperture 4 with its required depth on the graduated scale 8 by movacute angles pointing to the front and rear of the ing up or down the knob K which is secured to device, it is obvious that it could be so placed that the plunger I2, the up and down movement be 20 its obtuse angles occupied these positions, in ing transmitted to the sliding member 9 through which case the lead pencil line IB would of course the tubular member II which is rigidly secured come at the obtuse angles, to said slidingr member, all of which is obvious I claim: from the description of these parts given above. A spot gauge comprising a member provided When the indicator has been set, the operator 25 with a sight opening and a second member form grasps the disk I? and turns it either to the right ing a right angle with said first member, a slid or left, which movement is transmitted to the able portion on the rear face of said second mem rotatable portion of the sleeve I4. It will be re ber, a measuring scale mounted on said second called that the sleeve I4 is bisected by a curving member, an indicator mounted on the slidable cut I5, and when the rotatable portion is turned 30 portion and movable therewith through a slot in a suiñcient distance this curving cut provides a the second member, a tubular member rigidly camming action which forces the rotatable por mounted on said slidable portion and movable tion of the sleeve I4 ñrmly against the disk I6, therewith through an aperture in said second which in turn is forced ñrmly against the vertical member, a housing for said tubular member, said ’ member 2 and there held in gripping engagement, housing being bisected by a curving cut and one which prevents further up and down movement section of said housing being rigidly Secured to of the slidable face 9 and consequently of the in said tubular member while the other section is dicator I9. rotatable about said tubular member, so that said The sharp point I3 is so positioned as to be in curving cut affords camming action when a sec exact alinement with the indicator IU, and it will 40 tion of said housing is rotated about said tubular be readily understood that now the point I3 is member for retaining said slidable portion at a at exactly the same depth on the wood as the in predetermined position, and an element termi dicator shows. All the parts are now in the nating in a sharp point and 'adapted for forward right position for marking, and the operator and backward movement within said tubular strikes a blow on the knob K, which drives the .member for making a mark on the article to be plunger I2 backwardand forces the sharp point spotted atv a point in alinement with said indi cator. I3 into the wood, thus leaving a mark for boring a hole at exactly the place where it desired to HERMAN BIEG. insert a pin or provide a hole for the reception of a, pin.