US2259649A

US2259649A - Spring mechanism for lead carrier of magazine pencils

Info

Publication number: US2259649A
Application number: US363252A
Authority: US
Inventors: Maucher Hans
Original assignee: NORMA MULTIKOLOR Inc
Current assignee: NORMA MULTIKOLOR Inc
Priority date: 1940-10-29
Filing date: 1940-10-29
Publication date: 1941-10-21
Anticipated expiration: 1958-10-21

Description

Oct. 21, 1941. H. MAUCHER 2,

SPRING MECHANISM FOR LEAD CARRIER OF MAGAZINE PENCILS Filed Oct 29, 1940 INVENTOR HANS MAUCH ER BY @Znw rm? ATTO R N EYS Patented Oct. 21, 1941 UNITED STATES PATENT OFFICE SPRING MECHANISM FOR CARRIER OF MAGAZINE PENOILS Hans Mauclier, New York, N. Y., assignor to Norma Mnltikolor, Inc., New York, N. Y., a corporation of New York Application October 29, 1940, Serial No. 363,252

'1 Claims.

In practice, it has been found that lead carriers of multi-color or magazine pencils employing a single leaf spring, are unsatisfactory, due

primarily to the weakness of the leaf spring, which is mounted on the carrier and exerts lateral pressure between the channel guide and the opposing inner wall of the pencil casing. For example, 11' while the carrier is in its advanced writing position, the pencil is accidentally dropped so that the lead strikes the floor, the force of the impact is transferred to the thumbpiece and thence to inner extremity of the leaf spring. 'I'his -especially when done repeatedlyconstrains the spring towards the shank of the carrier and eventually destroys the set resiliency of the springthus impairing the operation of the pencil. As a matter oi. fact, constant use of the carrier-in complete absence of any undue jolting-frequently results in a fatigued or weakened spring. I

I have eliminated the foregoing disadvantage by the incorporation of an auxiliary spring which absorbs the brunt of any impact or excessive wear, and materially increases the longevity of the pencil.

In the accompanying drawing,

Flg. 1 is a side elevation of the carrier and the main and auxiliary springs prior to their assembly. I

Fig. 2 is a front elevation of the main spring.

Fig. 3 is a transverse section along lines 3-3 of Fig. 2.

minal it of the spring is curved while the opposite terminal is formed with shoulders ll-ll and a pair of longitudinal flanges i8-l8.

Upon the other hand, auxiliary spring I2 is comparatively short and virtually describes an obtuse angle with its free extremity l9, designed Fig. 4 is a side elevation of the carrier assem- I inafter explained. The other terminal has shoulders 20-20 and a reduced tongue 2|.

In assembling the carrier unit the two springs II and l2,.as illustrated in Fig. 1, are-placed in 5 superimposed relation with tongue 2| lying in the, seat between flanges l0-I0 to preclude displacement, and with shoulders ll-ll and 20-20 coinciding. Together the two terminals are inserted into socket it down to their hilts, i. e.,

their respective shoulders l'I-ll and 2020.

Then the socket is compressed to securely anchor the springs-see Fig. 5whereupon they are simultaneously bent downwardly, at an angle to shank l3, as shown in Fig. 4. Finally, the carrier,

in its entirety, is introduced into the channel guide 22 of casing 23 with thumb-piece Ii lying in slot 24. As the thumb-piece is depressed and the unit is shifted from operative to inoperative positions, or vice versa, the free end IQ of auxiliary spring l2engaging the main spring. at a point directly opposite the thumbpiece-serves to relieve the main spring from undue strain, shock or wear, and thereby bolstering the main spring and rendering it exceedingly durable and 25 positive in action.

I claim:

l. A lead carrier for multi-color pencils having a socket at one end, a main leaf spring, an auxiliary leaf spring, corresponding terminals of said springs having shoulders, the said terminals adapted to be inserted in said socket up to said shoulders and secured therein, and an actuating device carried by said main spring.

2. A lead carrier for multi-color pencils hav ing a socket at one end, a mean leaf spring, an

auxiliary leaf spring, one terminal of the main spring having a seat, the corresponding terminal of the auxiliary spring designed, to rest in said seat, and the two terminals adapted to be in- 40 serted in and secured to said socket, and an actuating device carried by said main spring.

3. A lead carrier for multi-color pencils having an open end, a pair of leaf springs, corresponding extremities of the springs disposed within the open end of, and clenched together with, the carrier, and the protruding portions of said springs lying at an angle to the body of the carrier.

. 4. A lead carrier for multi-color pencils having an open end, a main leaf spring, a relatively short auxiliary leaf spring, corresponding extremities of the springs disposed within the open end of, and clenched together with, the carrier, and the protrud 3 portions of said springs lying to Conta t wi h th m p as will be hereat an angle to the body of the carrier.

aasaeee spaced from the main spring therebetween, the point of engagement of one terminal 01' the auxiliary spring with the main spring being opposite said actuating device.

'I. A lead carrier for pencils having a socket at one end. a pair oi leaf springs, corresponding ter- -minaisofsaidsprinasadaptedtobeinsertedin said socket, secured therein and bent upon themselves, and means carried by the springs for determining their extent of insertion in said socket.

HANS su ucmm.