US1109322A - Drafting instrument. - Google Patents

Description

J. P. COLLINS.

DRAFTING INSTRUMENT.

APPLICATION FILED SEPT. 28, 1910.

1,109,322, Patented Sept. 1.1914.

Witnesses THE "wants PETERS ca, PHOTO LITHO WASHINGTON. n u.

JOSEPH FRANCIS COLLINS, OF WASHINGTON, DISTRICT OF COLUMBIA.

DRAFTING INSTRUMENT.

Specification of Letters Eatent.

Patented Sept. 1, 1914.

Application filed September 28, 1910. Serial No. 584,267.

To all whom it may concern:

Be it known that I, JOSEPH FnanorsCon- LINS, a citizen of the United States, residing at 2049 Ninth street northwest, Washington, District of Columbia, have invented certain new and useful Improvements in Drafting Instruments, of which the following is a specification.

This invention relates to an improvement in drafting instruments and has for one of its objects to provide a marking attachment, comprising a plurality of marking elements, which is primarily intended to be applied to compasses of different types, but which may be used, by applying a suitable handle thereto, as a railroad pen, or in fact as any straight line pen.

A further object of the present invention is to provide a marking attachment, which may be used as a common bow pen to draw a single straight line, or by making certain adjustments therein may be converted into an instrument whereby a plurality of parallel lines may be drawn simultaneously.

1 am aware that drawing instruments have been heretofore invented which contemplate the drawing of a plurality of lines at one time, but no instrument has. heretofore been invented, in so far as I know, which provides a plurality of marking ele ments, so arranged that any one of saidelements may be adjusted into or out of marking position, and where all of said elements may be brought into marking position, at

the same time.

The present invention comprises a plurality of marking elements adjustably secured to a common member, and means engaging each of said elements, whereby either one of them maybe adjusted, vertically, into and out of marking position; the outer one of said marking elements being provided with means for laterally adjusting it in relation to the inner marking element.

Further objects and advantages of my invention will appear from the following descript-ion, with reference to the accompanying drawing, wherein- Figure l is a view in side elevation of a compass provided with my invention. Fig. 2 is a detail view of my improved attaclnnent, partly in section. Fig. 3 is a sectional view taken on the line 33 of Fig. 1. Fig. 4 is a view in side elevation of a modified form of my invention.

Referring more specifically to the drawings, wherein like reference numerals indicate like parts throughout the different views, the numeral 1 designates a compass of the ordinary construction, comprising the depending legs 2 and 3, pivotally connected, as at 4. I

The leg 2 is made in two sections, which are hinged together at the point 5, the lower section of the said leg being provided at its extreme lower end, with a pivot or needle 6. The opposite leg 3 has a socket formed in its lower end, wherein the reduced end of the shank 7 fits, being held in place by means of the set screw 8.

A. yoke member 9 is secured to this shank 7 means of the hinged connection 7, this yoke member having a pair of alined bear- Y ings formed adjacent to the lower ends of the depending tines 9 On the outer face of one of the tines of said yoke member,

and surrounding one of the aforementioned bearings, an annular stud projects, being indicated by the numeral 10, the outer face of said stud having recesses 12 formed thereon.

An abbreviated shaft 13 is adapted tov pass through the alined bearings of the yoke member, one end of this shaft having a transverse lug or knife-edged pin 14 secured thereto, which is arranged to normally engage in the recesses 12, of the stud A suitable head is provided at the opposite end of the shaft 13, and a small coil spring 15 is placed thereon, whereby one end of the spring will abut against the inner face of the head while the other end will press against one of the depending tines of the yoke 9; the normal tendency of said spring being to hold the lug or pin 14: in engagement with one or more of the recesses 12, 7

whereby the shaft 13 will be prevented from rotating.

Rigidly mounted on the shaft 13 and located between the tines of the yoke member 9, is a small pinion 16, the function of which 7,

will be further described hereinafter.

The numeral 17 indicates a marking element, provided with a head portion 18, the inner face thereof having rack teeth 19 formed thereon. Side plates 19 are suitably 1 secured to said rack head, the free edge thereof being bent, thus forming flanges 20.

In assembling the different parts of my invention thus far described it will be seen that the side plates 21, together with the a5" parallel to'the guide rod 25, and provided head portion of the marking element 17 form a substantially hollow rectangular casing,"which is'adapted to be inserted between the tines of the yoke member 9. The abbreviated shaft 13,

tical slots 22, formed. in the side plates 21 while the pinion 16,

will readily mesh with the rack teeth 19'0f,

to prevent any lateral play of the abovenamed'marking element, a substantially U-shaped guide issecured to'the outer face of one'of the side plates 21, within which one of the tines of the'yoke member 9 snug-g The numeral 24, indicates a short rail member, which 'is provided on its inner face with the rack teeth 25. This rail member h as slide-ways 26, formed on each side,

plates 21',"are adapted to fit, 'while 'the rackf 3 teeth 25, are so located that they will mesh with the opposite side of the pinion 16, from' that which'meshes with the teeth 19 of the marking element 17.'- On the outer face of this rail member 2 1, and adjacent to the lower'end thereof, is the outwardlyextencb ingguide rod 25*, while-from adjacent to the top of said rail, projects an adjusting rod or bar-26, this last named rodf being with screwthreads throughout its length.

' I The marking element 27 which is sub-f sta'ntially a di'iplicate' of element 17, has an angular head 28, the upper portion thereof being bifurcated 26*; Two sets of bearings are formed in'this upper portion, and are "spaced apart exactly the same distance as within" the bifurcated'endportion 26 of'the head 28;'and in alineme'nt with th'e' b'ear'ings F are the guide rod and the adjusting rod on the rail member2 i. e x

A suitable "adjusting nut 29' is inserted formed'therein, the said nut being 'adapted to-mesh with the screw threadsOnthe rod 26 when the parts are assembled.

From the above description, theope'rati'on of my device will be seenflto be as follows:

the embodimentshownin Fig. 1, wherean my nventlon is shown attached to a compass of the ordinary construct10n,=whenever it is necessary touse thef-instriunent to draw a single circle of extremely small diameter,

the inner marking element 'must be used markin alone. In this case, supposing the 'outer element'to bein marking position,

"the 'sha t 13 is pressed inwardly a'gainst the pressure of the spring 15. "As has been stated heretofore, 'this shaft carries the locking key or :pin; 14, which i's'normally heldin passes through ,ven-u po'site directions simultaneously.

1 elements, elements engagement with the recesses by the v sprlng 15, so'tha-t it will be seen thatit is formed 011 the marking elements, and willaccordingly raise the outer marking elementa and lower the inner one to the desiredpov 1 sition. The shaft 13 being released,*when the markingjelement is in the desired posi-f tion'the locking element or key will immediately engage with the"'recesses 12 and thus securely lock the two marking elements in their" adjustecbpo'sitions. In some instances,

however, itis necessary todraw a plurality. j

ofsets of concentric circles; as in the case of illustrating an end view of-a number of pipes. WVhenusdiin an instance of this kind, the marking elementsfa'rei adjusted in the marking points thereof are brought into alinement, the outer marking elementbeing- I "indicate the I thickness of the pipe, after which adjustments have been 'made the -instrument IS'HSGCl as anordlnary compass."

Itwillbe understood that I may accom- 1 '7 whereby the shaft 13,'and also the v wthe manner as' desc'rib'ed above "except that I wherein the fla'ngededges20, of the side vadjusted laterally by means of the adjusting j there is a' sufficient distance'be, "tween the "twoelementsg asgfor" instance, to'si 95,

plish t-the: vertical' and lateral adjustments- I of the marking elements in various ways,

the means disclosed in the; accompanying drawing 1 i simply illustrating the I preferred embodiment ofmy lnvention". v i What I'olainn and'forwhich I desireto I '"sec'ureIietters Patent,is: a 1. In a drafting instrument, a supporting v member a plurality -of marking? elements mounted thereon, I and common means 1 for adjusting the different elements in op'posite' directions simultaneously one toward and the other from said member.

2. In'a draftihg-instrmnent, aplurality I of marking elements parallel to each other,

relative to each other; and means for verti 3. In a. drafting instrument, the combina- -'means for' laterally spacing. said elements;

tion of'aholder with a plurality of marking 2 means common to each of said for, Y vertically 5 ad tlStlIlg them 1 s1- multaneously, and means" for} 'lOCklDg said adjusting means whereby said elements will beheld in their adjusted positions.

iz-In adraftinginstrument, the combina- *tion with a' supportingimeinber and a? pair 0f marking elen1ents"'arrangecl thereon to assumemarkingpositions spaced apart, of

common means connected to eachof saidelements for adj usting the 1 same toward. and

from said support so that one will be in its marking position and the other out of its marking position or both in their respective marking positions.

5. In a device of the class described, the combination with a pair of markin elements and a supporting member theretor, of lateral adjusting means connected to one of said elements, and common adjusting means connected to each of said elements for adjusting the same simultaneously toward and from said support so that one will be in its marking position and the other out of its marking position or both in their respective marking positions.

6. In a device of the character described, the combination with a plurality of markin r elements, rack teeth carried by each of said elements, of means adapted to mesh with said rack teeth, whereby said marking elements may be vertically adjusted in opposite directions simultaneously.

7. A drawing instrument comprising adjacently mounted reciprocable marking elements arranged to assume marking position spaced apart, and common means for reciprocatin said elements to bring either one into an the other out of its marking position.

8. A drawing instrument comprising adjacently mounted reciprocable marking elements, and common means for reciprocating said elements in opposite directions simultaneously to bring either one into and the other out of marking osition.

9. A compass comprising a center point, a movable member havin mounted thereon a plurality of marking e ements arranged to mark upon adjacent portions of a surface one at a greater distance from said center point than the other, and common means for adjusting said elements toward and from said member so that one will be in its marking position and the other out of its marking position or both 1n their respective marking positions simultaneously.

In testimony whereof I aiiix my signature in presence of two witnesses.

JOSEPH FRANCIS COLLINS.

Witnesses:

Lnsm'n SMrrHsoN, FRANK S. APPLEMAN.

Copies oi this patent may be obtained for five cents each, by addressing the Commissioner oi Iatcnts, Washington. D. 0."

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