US994226A

US994226A - Take-down pocket-knife.

Info

Publication number: US994226A
Application number: US57728610A
Authority: US
Inventors: Carl H White; Royal A Lett
Original assignee: PIOGRAM SALES Co
Current assignee: PIOGRAM SALES Co
Priority date: 1910-08-15
Filing date: 1910-08-15
Publication date: 1911-06-06
Anticipated expiration: 1928-06-06

Description

U. H. WHITE (in R. A. LETT:

, TAKE-DOWN POCKET KNIFE.

APPLICATION FILED AUG. 15, 1910,

Patsnted June 6/1911.

UNITED STATES, PATENT onnion.

CARL H. WHITE AND ROYAL A. LEFT, 0]? DENVER, COLSRADO, ASSIGNORS, BY DIRECT AND MESNE ASSIGNMENTS, TO THE PIOGBAM SALES COMPANY, OF DENVER, COLO- BADO, A CORPORATION OF COLORADO.

TAKE- DOWN POCKET-KNIFE.

To all whom it may concern:

Be it knownthat we, CARL H. WHITE and ROYAL A. Law, citizens of the United States, residing in the city and county of Denver and State of Colorado, have invented certain new and useful Improvements in Take- Down Pocket-Knives; and we do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it apertains to make and use the same, reference heing'had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

' Our invention relates to improvements in 1 take-down pocket knives.

In our improved construction the blade or blades are removable from the handle without removing the pivot pin. For the purpose of securing the blade in place, a sort of dog is employed, which cooperates with the peculiar construction of the shank of the blade to form a'bearing entirely surrounding the retaining pivot.

In our improved construction the shank of the blade is provided with a slot which .opens at the inner extremity of the blade,

7 the width of the slot being such as to receive the pivot, and the direction of the slot being at an angle to the length of the blade, and consequently at an angle to the direction of the force applied to the blade by the main spring of; the handle; and by virtue of this construction. the blade will be retained in place when in the wide-open position, without the employment of the cooperating dog heretofore mentioned.

Having'brieliy outlined our improved construction, we will proceed to describe the same in detail, reference being made to the accompanying drawing in which is illustrated an embodiment thereof.

In this drawing: Figure 1 is a view of a knife equipped with our improvements, one side of the handle being removed, the

" rivet pins bein shown in cross section and the blades in the wide-open position. Fig.

2 is a similar view with the blades, however, in different positions. Fig. 3 1s a fragmentary view of the knife with the parts shown on a larger scale, the retainin dog being omitted, and the blade being s iown in the wide-open position. Fig. 4 is a similar View,

Specification of Letters Patent.

Application filed August 15, 1910.

Patented June 6,1911. Serial No. 577,286. 1

the blade, however, being shown in two positions, the wide-open position being indicated by dotted lines, and a position approaching the right angle position being shown in full lines. In this View the retaining dog is shown in place, but unlocked, the blade being in position to be removed from the handle. Fig. 5 is a similar view showing the blade in two positions different from those shown in Fig. 4:. Fig. 6 is a side elevation of the retaining dog.

The same reference characters indicate the same parts in all the views. Let the numeral 5 designate the handle of the knife considered in its entirety, the main spring being designated by the numeral (3, and the sides of the handle by the numeral 7. The spring is held in place by a centrally located rivet 8, while each extremity of the handle is equipped with a. rivet pin 1, forming the retaining pivot for the blade. The shank of the blade is provided with an open slot 9 extending at an angle to the length of the blade and also at an angle to the face 10 of the shank of the blade, upon which the extremity 12 of the spring bears.

\Vh'en the blade is in the wide-open position,

the dosed-extremity of the slot 9 is uppermost, whereby the pressure of the spring serves to retain the blade in place, since it.

could only be removed, without changing its position, by pressing the engaging extremity of the main spring outwardly a considerable distance. W hen, however,'it is desired to remove the blade, it is turned to aposition forming a considerable a hgle with the handle, the blade approaching a position forming right angles with the handle (see Fig. 1). When this is done the blade is so arranged that the. pressure of the spring upon the shank thereof is in such a direction as to automatically eject the blade from the handle, assuming that the retaining dog is not employed or that it is in the unlocked position.

The retaining dog, which we w ill designate in its entirety by the numeral 13, is composed of a body part 14 adapted to fit the shank of the blade and give to the latter an approximately rectangular shape. This body part is provided witha projection 15 adapted to enter the slot 9 of the shank of the blade, and is provided with a curved re cess to shaped to fit the pivot pin 4 of theblade, thus forming a half bearing for the pin, the other half of the pin bearing being 1n the slot itself, whose inner extre1nity is rounded to fit the pin.

Projecting forwardly from the body of the. dog is a relatively narrow spring n1em-.

, ber or tongue 17 having a tooth 1.8 at its outer extremity adapted to enter a counterpart recess 19- forrne'din the shank of the blade, forward of .the pivot pin bearing. This tongue is normally'bowed upwardly as shownat 20 and when inits normal position its tooth 18 rests upon the edge of. the

blade shank just-in the rear of the recess I 19'. However, by pressing inwardly upon the 'bowed part of the spring tongue, the lat ter will be elongated in the direction of the v. blade sufliciently to' cause the tooth ,18 to 'enter the recess 19, whereby the dog Will .be locked in position upon the blade until the tooth is disengaged from its recess manually. Hence when the tongue isin'the locked position it virtually fonns a part of the blade shank and the two connected or companion parts of the shank form a complete bearing surrounding the pivot pin of the blade. I

In order to insert a blade in the'handle,

the blade is placed in-a' osition at righta'nglesto the handle as'in icated by dotted lines in Fig. 5. It .is then moved into the sition and thefconstrnction willvthen con-j form tojthe illustration in Fig.3, assuming 4 handle extremity, whereby the pin 4 is placed in position within the slot of the;

shank; a' small part- 21 of the shank engaging the outer extremity of thesp'ring. The blade is -then moved outwardly turning on its pivot until it reaches the wide-open pothat one 30f the handle members is removed.

' The knife is then laid upon its back, so to position"; the blade-is closed and as it approaches the closing position the bow-shaped speak, or with theedge where the main spring is located lowermost, and the dog is dropped into place. In this event the position .of the dog with relation to the blade will be as illustrated in full lines'in Figs.'

4 and 5. With the knife still in the same part of the spring tongue 17 will engage the main spring-of the-handle, which..w1ll

act on the tongue to cause'its bowed portionto spring inwardly toward the shank of the blade, whereby the tongue will .be elongated sutfi'ciently to cause itstooth to slip into. the recess 19, whereby'the dog will be locked in lace. Now if it is desired'to remove a blac e, the same will first be thrown to the wide-open position, after which the Q outer extremity of the tongue will be forced outwardly from the edge of theshank ofthe blade until the tooth is disengaged from its recess; The dog will then be loose, but the blade will be retained in place as long 'as it isin the wide-open position, since the form a-bearin'g forthe having aforwardly pro ecting spring arm .a toot force of the spring acting thereon will be enertcd approximately in the direction indicated by the. dotted line 92 in Fig. -3.

Now if it is desired to remove the blade,"

thelatt'er. will be moved toward the closing posltlon until it reaches approximately the position shown in Fig. 4, being slightly re-.'

moved from the right angle position. In

this event the powciyof-the spring is excited in, a direction lengthwise with the slot or recess 9, and the blade will be auto-.

ni'atically ejected by the spring;

Hav ng thus dcscrib'ed'our invention what we claim 1s:

1. A knife composed of a handle, a' main spring, the handle being equipped with a pivot: pin in the end thereof,- a blade. hav-' ing a slot atthe extremity of the shank, open to receive the pivot pin, the. recess being elongated in the direction of a line forming an angle with the length of the blade,

and a locking dog having a projection adapted to enter the recess of the bladekand forming in conjunction with the latter a bearing for "the pin, the said dog havin a forwardly projecting spring armprovi ed with a tooth at its outer extremity adapted to enter a recess formed in the blade, the spring arm being normally bowed to prevent its-tooth from entering the recess, but,

adapted when pressure 'is applied jto its bowed portion inwardly toward the blade,

to be elongated. suiliciently tooause'its toot-h" to enter the recess of the blade, whereby the dog islocked in place. v

2. A knife composed of a handle, a main spring, a blade. having an open slot' in its s ank, to receive the pivot pin carried by the handle, th length of the slot being in clined. to the length of the blade, and a cooperatinglocking dog applied to the shank and having a projection entering the slot .of the shank and cooperating with the latter to pivot pin, the 'dog provided with a tooth. adapted to enter a wardl projecting spring arm pl'bvi ed with hadapted to enter the recess formed in the blade when the-spring arm is placed under tension, substantially'as described;

a pivot pin fast, in t e slot of the blade, the dogvalso havin a fori 4. A knife composed of a handle having ivot in, a blade hava main spring an to receive the ing an open slot a apte pivot pin, the slot extending a." direction llltlllllltl to the length of the blade, wherewvith a detachable dog cooperatingwith the by when the blade is in the Wide-open poblade to form a bearing; for the pivot pin; sition the action of the spring serves to the dog having a spring" arm provided with retain the blade in place, and a locking dog :1 tooth adapted to interloek with the slot applied to the pivoted extremity of the blade formed in the blade when the. said arm is and having a projection adapted to enter the placed under tension, substantially deslot of the latter, the dog also having a forscribed.

wardly projecting spring tongue provided In testimony whereof we aflix our signawith a tooth adapted to be forced into a tures in presence of two witnesses. 1 counter )art recess formed in the bltde when ,Y

O 1 1 CARL H. MUTE. the springtongue 1s placed under tension, 1 r

V tOXAL A. LIJLT. substant ally as described.

A knife composed of a handle having \VH'IIQSSBSZ a nnun spring and a pivot'pln for the A. J. OBRIEN, 15 blade, and a blade provided with a slot and F. E. Bowrmx It is hereby eertified that the name of the assigneevin lletters Patent No. 994.226, granted June 6, 1911, upon the application of Carl H. \Yhite and Royal A. Lett, 0f Denver, Color-ad for an improvement in Take-Down Pocket-Knives, was erroneously Written and printed as "he Piogram Sales Company Whereas said name should have, been written and printed The fiagran Sate Company; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Otfiee.

Signed and Sealed this 1st day of August, A. D., 1911. p I SEAL E. B. MOORE,

00mm 5mm; 01' of Patents.

llltlllllltl to the length of the blade, wherewvith a detachable dog cooperatingwith the by when the blade is in the Wide-open poblade to form a bearing; for the pivot pin; sition the action of the spring serves to the dog having a spring" arm provided with retain the blade in place, and a locking dog :1 tooth adapted to interloek with the slot applied to the pivoted extremity of the blade formed in the blade when the. said arm is and having a projection adapted to enter the placed under tension, substantially deslot of the latter, the dog also having a forscribed.

O 1 1 CARL H. MUTE. the springtongue 1s placed under tension, 1 r

V tOXAL A. LIJLT. substant ally as described.

Signed and Sealed this 1st day of August, A. D., 1911. p I SEAL E. B. MOORE,

00mm 5mm; 01' of Patents.

It hereby rel-rifled that the name of the assignee in Letters Patent No. 994326,

granted June 6, Hill, upon the uppliration of Carl H. White and Royal A. Lott, of

Denver, (qloizuim for an improvement in Take-Down Pocket-Knives, was

whereas said erroneously written and printed as "he Piogmm Sales Company name sholild have been written and printed The Iivgmn Sales C mpany; and that the said Letters Patent should he reml with this correction therein that the same may conform to the record of the ease in the Patent Olrice.

Signed mid sealed this 1st day of August, A. 1 1911.

ISEAL.) E. B. MOORE Cum missionaof l Wants.