US2574664A - Lettering scriber - Google Patents

Description

W. H. SCHNEIDER Nov. 13, 1951 LETTERING SCRIBER 2 SHEETSSHEET 1 Filed March 5, 1949 INVENTOR. WALTER HARRY SCHNEIDER N 1951 w. H. SCHNEIDER LETTERING SCRIBER 2 Sl-lEETS-Sl-IEET 2' Filed March 5, 1949 x mm INVENTOR. WALTER HARRY SCHNEIDER Patented Nov. 13, 1951 UNITED STATES PATENT OFFICE 2,574,664 LETTERING SCRIBER Walter Harry Schneider, Ridgefi eld, N. J assignor to Keuff'el"& Esser Company, Hoboken, N. J a

corporation of New Jersey Application March 5, 1949, Serial No. 79,797

4 Claims.

This invention relates to lettering instruments. It is useful in lettering instruments of the general type shown and described in U. S. Patent 2,011,195 to Adolf W. Keuffel. This type of let- }t'ering instruments consists of a scriber provided with a writing instrument having a tracer pin and a' tail pin; and a template provided with indicia or markings which may be followed by .thetracer pin and a tail pin groove parallel to the direction of lettering for receiving the tail pin. .The term indicia as used herein is meant .to include all types of markings which may be reproduced, such as letters, numb'ers,'electrical symbols, welding symbols and the like.

It has become the practice in the manufacture of templates for this type of lettering instrument to make templates of at least two widths. The

wider templates may be for the purpose of carwriting instrument and tracer pin.

As described in the aforementioned patent the usual template has indicia which are backwardly inclined by a predetermined amount so that the adjustable scriber will draw erect indicia in its closed or normal position. If the spacing between the writing instrument and the tracing pin on the adjustable scriber is increased from the closed or normal position, the scriber will draw forwardly slanted letters if the same template is used.

If the wider form of template is provided with indicia having the same backward slant, the adjustable scriber in open position will draw forwardly slanted letters. In order for the adjustable scriber to draw upright indicia in its open position, it was necessary to increase the back- Ward inclination of the indicia on the templates.

In using this system, it was necessary to make vide a tail piece extension for an adjustable scriber of a lettering instrument so that it may be-used. in the open position with a wide template 2. to draw erect indicia when the indieia on the template are inclined only the normal amount;

This and other objects of the invention and the method of their attainment will be more fully understood from the iollowi'ng description taken inconnection with the accompanying drawing in which:

Figure I is a view in plan of the lettering iristrument shown and described in Patent N6. 2,011,195 with a tail piece extension arm secured to the adjustable scriber thereof.

Figure II is a View in elevation and partly in section of the tail piece extension arm shown in Figure I.

Figure III is a view in plan looking from the underneath side of the arm as shown" in Figure I.

Figure IV is a view in plan of the lettering instrument shown and described in patentapplication Serial No. 6576, filed February 6, 1948, with a tail piece extension arm securedto the adjustable scriber thereof.

Figure V is a view in elevation and partly in section of the tailpiece-extension arm shown Figure IV.

Figure VI is a view in plan of the tail piece extension arm look-ing from the underneath side of the arm as shown in Figure IV.

Referring to Figure I} the adjustable scriber l'lis provided with a tail piece extension arm 50'" and is arranged for use with the-wide template 16. The template I6 is provided with a tail pin groove ['8' and indicia grooves 15. The scriber H is made up of a-bod yportion 23, a tail pin arm 2-2, awriting instrument arm 25 and an" adjustable tracer pin arm 24. The tail piece 22 normally' carries a tail pin at ll but this has b'ee'n removed to permit the extension 60 to be secured to the scriber H. The writing instrument arm 25 is provided with means for holding a writing instrument which in this case is the pen I2. The adjustable tracer pin armcarries the tracer pin [4.

The adjustable tracer pin arm pivots around the pin 62 carried within the body 23- of the scriber ll. An arcuate slot 68'is provided in the tracer pinarm 24* which receives the pin 69" car nee the body 23 or the scriber H. Fhe pin 69- limits the pivotal motion-of the tracer pin-arm 24 and is threaded to receive the knurled n'l'it' 1 1 at its lower extremity. knurled nut 14 serves to clamp the tracer pin arm adjusted position. b

In Figure I the adjustable arm 2 4 is shown adjusted to a predetermined open position. I-tis shown in dotted lines in its normal closed posi tion. When the adjustable scriber is assembled with the'tail pin in its normal pqsition' andwith the adjustable scriber in its closed or normal posit n; th w in ns umen tracer pin a tail pin form the vertices of a triangle I2, I4, II. The tail pin extension arm 60 is provided with suchv dimensions that the tail pin I'I, writing instrument I2 and tracer pin I4 in predetermined position form the vertices of a triangle I2, I4, II. It is necessary that the triangle I2, I4, I! be substantially geometrically similar to the triangle I2, I4, IT, in order that the open scriber with tail pin extension will draw erect indicia I3 from the indicia I5 provided on the template I6 and having the normal backward slant as will permit the adjustable scriber in normal position without tail piece extension to draw erect indicia, The dimensions of the tail piece extension :EIJ'that will accomplish this result will depend on the dimensions of the adjustable scriber including the position of the pivot pin 62 for the adjustable tracer pin arm and the desired predetermined spacing between the writing instrument I2 and the tracer pin I4 which will in turn depend on the width of the template I6. These dimensions may be readily ascertained for any given adjustable scriber and any given template by a person skilled in the art.

In order that the spacing between the writing instrument I2 and the tracer pin I4 may be accurately set to the predetermined value when using the tail pin extension 60, a pair of marks or holes 80 and 82 are provided on the template III The spacing may be readily set to the predetermined value by comparison with the marks 80 and 82.

The tail piece extension arm 80 shown in Figures II and III is provided with an opening 84 on its under side accurately made to receive the tail pin arm 22 of the scriber II. The hole 86 provided at the top of the extension arm 60 opens into the opening 84. In order to apply the tail piece extension arm 60 to the adjustable scriber II, the tail pin must be removed from the tail pin arm 22. The tail pin arm is then inserted in the opening 84 of the extension arm 60 so that the hole 86 lines up with the hole II. The tail pin extension arm may then be secured to the tail pin arm 22 by a screw 88 passing through the hole 86 and engaging threads in the hole II which is threaded to receive either the tail pin, 1. e., the screw 35 or the screw 08.

The tail pin Il may be secured to the tail pin extension arm 60 in the same manner as it is normally secured to the tail pin arm and as is shown and described in Patent No. 2,050,058. The pin I? is tightly fitted in an axial hole provided in a screw 35. with a head 34 which determines the spacing between the lower surface of the extension arm 60 and the template I6. The screw 35 engages threads in the hole 38 provided in the extension arm 60 thereby securing the tail pin I! to the extension arm 50. A weight 38 may be provided which has a threaded hole to engage the screw 35. The weight 38 is preferably of lead and helps to prevent the tail pin from coming out of the tail pin groove I8.

Referring to Figure IV, the adjustable scriber I38 is provided with a tail pin arm I42, a tracer pin arm Hi8, an adjustable writing instrument arm I50 and a body portion I40. The tail pin arm normally carries a tail pin at I52, but in Fig. IV the tail pin extension arm 260 is secured thereto. The tracer pin arm I48 carries the tracer pin I54. The writing instrument arm is provided with means for carrying a writing instrument which in this embodiment is the pen I56. The writing instrument arm I50 pivots about 4 the pin I45 and is provided with an arcuate slot I12. The fixed pin I10 passes through the armate slot I12 and limits the motion of the writing instrument arm I50. The lever I80 engages threads on the pin I10 and clamps the adjust- V able writing instrument arm I50 in adjusted The screw 35 is provided position.

The adjustable writing instrument arm I50 is shown in an adjusted open position with the writing instrument I56 spaced at a predetermined distance from the tracer pin I54. The writing instrument arm I50 is also shown in dotted lines in its normal position. When the writing instrument arm I50 is in its nomral position, the writing instrument I56, the tracer pin I54 and the normal position for the tail pin I52 form a right triangle I52, I54, I56.

When the writing instrument arm I50 is adjusted to its predetermined open position and the tail pin extension arm 260 is secured to the tail pin arm I42, the writing instrument I56, the tracer pin I54 and the tail pin 2II form the vertices of a triangle 2II, I54, I56. The triangle 2 I1, I54, I56 should be substantially geometrically similar to the triangle I52, I54, I56 in order that the scriber in predetermined adjusted position with the tail pin extension arm attached will produce erect indicia from a template provided with indicia slanted backward in the normal manner.

In the embodiment of Figure IV the triangles I52, I54, I56 and 2H, I54, I56 will be right triangles for the reasons described in patent application Serial No. 6,576 already referred to.

The template I02 may also be provided with two spaced marks or holes 280 and 282 for setting the spacing between the tracer pin I54 and the writing instrument I56 to the predetermined amount. This is the preferred method but this setting may also be accomplished by reference to an ordinary scale graduated in inches or any other convenient unit. The setting may also be made by means of the index mark I84 and the scale I82.

The construction of the tail piece extension arm 260 as shown in Figures V and VI is equivalent to the construction of the extension arm 60 in Figure I except that the dimensions are chosen to correspond to the adjustable scriber I38 instead of the adjustable scriber I I.

By adhering to the principle of similar triangles herein taught the invention can be readily applied to a wide variety of designs for adjustable scribers. Equivalent means for securing the extension arm to the tail pin arm may also be used within the spirit and scope of the inven tion.

Having thus described the invention, what is claimed is:

1. An extension for the tail piece of an adjustable scriber having a writing instrument, a tracer pin and a tail pin formingthe vertices of a triangle, the spacing between the tracer pin and the writin instrument being adjustable to spacings greater than the normal spacing at which the scriber draws erect indicia with the tail pin in its normal position on the scriber from a template having characters inclined at a predetermined angle, said extension comprising an arm having means for carrying a tail pin and means for securing said arm to the scriber, so that when said arm is secured to the scriber and the scriber is adjusted to make the spacing between the writing instrument and the tracer pin equal to a predetermined increased spacing, said means for carrying the tail pin is in such a position that a tail pin carried thereby together with the writing instrument and tracer pin in their adjusted positions form the vertices of a triangle which is substantially geometrically similar to the triangle formed by the writing instrument, tracer pin and tail pin when the tracer pin and writing instrument are adjusted to their normal spacing and the tail pin is in its normal position on the scriber.

2. A lettering instrument of the type described comprising an adjustable scriber having a writing instrument, a tracer pin and a tail pin forming the vertices of a triangle and which may be used with a normal width template having a tail pin groove and indicia grooves inclined at a predetermined angle, the spacing between the tracer pin and the writing instrument being adjustable to spacings greater than the normal spacing at which the scriber draws erect indicia with the tail pin in its normal position on the scriber from the normal width template; an ex tension arm for said scriber having means for carrying a tail pin; means for securing the extension arm to the scriber; a template wider than the normal width template having a tail pin groove and indicia grooves inclined to the same predetermined angle as in the normal width template, the width of said template bein greater than the maximum width which would permit complete indicia to be drawn therefrom with the normal spacing between the tracer pin and writing instrument and a pair of spaced marks on said wider template for setting the spacing between the tracer pin and writing instrument to a predetermined adjusted position, so that when said arm is secured to the scriber and the scriber is adjusted to make the spacing between the writing instrument and the pin equal to the predetermined amount, said means for carrying the tail pin is in such a position that a tail pin carried thereby together with the writing instrument and tracer pin in adjusted position form the vertices of a triangle which is substantially geometrically similar to the triangle formed by the writing instrument, tracer pin and tail pin when the tracer pin and writing instrument are adjusted to their normal spacing and the tail pin is in its normal position on the scriber.

3. An extension for a scriber having a writing instrument arm, an adjustable tracer pin arm and a tail pin arm, which arms carry a writing instrument, a tracer pin and a tail pin forming the vertices of a triangle, the adjustment of the tracer pin arm being capable of increasing the spacing between the tracer pin and the writing instrument to spacings greater than the normal spacing at which the scriber draws erect indicia with the tail pin in its normal position on the ing instrument and tracer pin in adjust-ed position form the vertices of a triangle which is substantially geometrically similar to the triangle formed by the writing instrument, tracer pin and taii pin when the tracer pin arm is adjusted to give the normal spacing between the tracer pin and writing instrument and the tail pin is in its normai position on the scriber.

An extension for a scriber having an adjustable Writing instrument arm, a tracer pin arm and a tail pin arm, which arms carry a writing instrument, a tracer pin and a tail pin forming the vertices of a triangle, the adjustment of the tracer pin arm being capable of increasing the spacing between the tracer pin and the writing instrument to spacings greater than the normal spacing at which the scriber draws erect indicia with the tail pin in its normal position on the scriber from a template having characters inclined at a predetermined angle, said extension comprising an arm which may be secured to the scriber for extending said tail pin arm having means for carrying a tail pin so that when said arm is secured to the scriber and the scriber is adjusted to make the spacing between the Writing instrument and the tracer pin equal to a predetermined increased spacing said m-eans for carrying the tail pin is in such a position that a tail pin carried thereby together with the tracer pin and writing instrument in adjusted position form the vertices of a triangle which is substantially geometrically similar to the triangle formed by the writing instrument, tracer pin and tail pin when the writing instrument arm is adjusted to give the normal spacing between the tracer pin and writing instrument and the tail pin is in its normal position on the scriber.

WALTER HARRY SCHNEIDER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,011,195 Keufrel Aug. 13, 1935 2,088,063 Kassebaum July 27, 1937

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