US1607097A

US1607097A - Extensible rule and pencil

Info

Publication number: US1607097A
Application number: US68055A
Authority: US
Inventors: James J Murphy
Original assignee: Individual
Current assignee: Individual
Priority date: 1925-11-10
Filing date: 1925-11-10
Publication date: 1926-11-16
Anticipated expiration: 1943-11-16

Description

E J. J. MURPHY EXTENSIBLE RULE ANDPENGIL Filed Nov. lO, 1.925

i rule extended to fu v I VFig-2 shows the same in colla sed form tter diev Q-estema 1926.

v1,607,097 .PATENT OFFICE.,

:ramas J. MURPHY, or DENVER, coLonAno. i

EXTN'SIBLE RULE .AND YPENCIL.,

Animation mea nnvember 1Q, 1925. sensi No. 68,055.

` A This invention relates to Va combination pencil andextensible rule.V v

p I'echanicsa and others oftentimes find .it necessary and very convenient to carry a I rule4 which will enable them to determine' distances either in the Englishy scale of inches or in the metric scale. 'It is also frei quently desirable to have-a pencil .where it y @loan be readily found vand used. Pencils of l0 `the type known as eversharp or which have a mechanism by means of which a molded piece of lead can be extrudeds as to always 'provide a proper pencil point are uiteextensively carried by the general pubhe. It is very seldom, however, that any one carries-about with himua rule of any kind.

It -is the', object of this invention to construct 'a pencil in` such -a manner that it `can be extended to a considerable len th and to provide "the'same' with graduations by meansoiswhich distances may be measured. pencil. is 'preferably formed of three M-,telescopic members of a square' cross-section, the smaller and innermost member forming vthe pencilproper and containing some suitable mechanism for controlling the extrusion of the lead. l if.. The type of pencil which I intend to employ as the foundation for this rule is one 3Min which b rotating a portion of the pencil, the lea can be extended to any desired distance. l I

In order to describe my invention so that its construction canbe readily understood, I shall have reference to the accompanying drawin in which the preferred embodiment t ereof has been illustrated andv in len h;

with a portion broken away to close the construction; and

Fig. -3 is a section takenlon line 3-3, Fig. 4

1, showing the manner of connecting vthe 'sections to one another.

My extensible rule consists tions, A, B, and C. The section indlcated by A is the pencil and is f ormed `from a f-o square piece of tubing within whose interior is housed the mechanism for controlling4 the lead. As-any suitable mechanism may he employed for. this purpose, I have not gone into details in explaining the means y which the lead -is controlled as this is a separate invention from the combination re 1 shows'm lcombinedA .pencil and' of three secdescribed herein. One end of section A has a conical portion whichv has been indicated by numeral 1 and extending radiallyfrom this is a knurled flange 2, which can be a0 grasped for the urpose of rotating the parts and of extru ing the lead 3. 'Slidably on theV tubular member 4 of section A is aV similar `tubular member 5 whose interiordimensions are slightly larger than-the "exi l5 terior dimensions of the part 4, and yconnected to part 5 of section B is a similar. square tubular section 6, whose interiord.i'` mensions are slightly greater than the exterior dimensions ofthe part 5.v In vorder tow prevent the several parts from "being separated one from the other, I secure .to the outer ends of parts and 5 a ferrule-' and to the inner partspf` sections 5 and 6 asimilar ferrule 8. These abut each other when the rule is extended 'to its utmost length and revents the parts from bein separated. llVihen the parts are collaps they also serve to keep them fromv wabbling wit respect to each other. In order to produce the necessary friction to hold the parts in-adjusted position, I referably slit the ends of parts Il and 5 in t e manner indicat- I ed by line 9 in Fig. 3. This makes the end v resilient and serves to press the outside of 35- the ferrule 7 against the'interior-of, the sur- 's rounding tube. One side of this extensible scale is provided with graduations infinches and fractions of an inch in the manner indicated on the right-hand side of the per- 00 spective view shown in Fig. 1. The other side shown on'the left-hand side of the perspective view' in Fig. 1 is divided into parts representing centimeters or some multiple or decimal thereof, so that the two scales are 4always available eitherfor the English system or the metric system. The other two sides oi the parts 4, 5, and 6 are left blank andit is' the intention to apply to these sides somesuitable advertising matter, as it is for 100 this purpose as well as for the convenience of the combination that this invention is intended. i

It will be noted that the base of the conical portion 1 has a Vdiameter somewhat 105 greater than the diagonal dimension of the` section A whereby a shoulder D is formed which serves as a stop for the sections Band C when they are moved towards closed po- 'sition.

When the parts are collapsed they have lill vthe appearance shown in Fig. 2 and have a l size substantially corresponding to that of anordinary pencil of this type.

In order to prevent the pencil from becoming lost. anda to attach it to the pocket, I have provided a clip'l() that is adapted to receive between it and the side of the pencil a portion of the pocket so as to prevent its accidental removal.

The knurled flange 2, aside from its function in enabling the lead to be regulated, also serves as a handle for the purpose of extending the several parts. If the conical end had a. perfectly smooth exterior surface, it is evident that more or less diHiculty would be experienced in pulling the parts out into extended form; Whereas, With this annular ridge, a good grasp can be had of the pencil section While the section 6 can be firmly held by the fingers of the other hand.

Having no7 described my invention, what I claim as new is:

1. A combined pencil and measuring rule comprising in combination, three telescopic sections ot rectangular cross-section, the

lsmallestI of which has a-wconical point provided With an axial opening for the reception of a lead, said conical portion having an annular flange adapted to be grasped when moving the parts from collapsed to extend- .ed position, the larger end of said conical portion having a shoulder adapted to serve as a stop for the other sections when in collapsed relation.

2. In a combined pencil and measuring rule, in combination, a plurality of telescopic sections cach formed from a rectangular tube. the smaller ol said sections having a conical end provided with an axial opening for the reception of a lead, the larger end of said conical portion having a shoulder that serves as a stop for the other sections Whcnin collapsed position and having also an outwardly extending flange which serves as a grip for moving the parts from collapsed to extended position, one side being graduated in inches and the other in centimeters.

In testimony whereof I aix my signature.

JAMES J. MURPHY.