US2416913A - Linoleum knife - Google Patents

Description

Match 4, 1947. DEB- .0 EAL 2,416,913

LINOLEUM KNIFE 7 Filed Sept. 27, 1945 I 2 Sheets-Sheet 1 BRUNO [N V EN TOR. @441; TE TE March 4, 9 B. DEL DEBBIO ETAL 2,416,913

LI'NOLEUM KNIFE Filed Sept. 27, 1945 2 Sheets-Sheet 2 I IN V EN TOR.

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Patented Mar. 4, 1947 UNITED qSTATE LINOLEUM KNIFE 1 Bruno Del Debbie and Walter Lister,-

San Francisco, Calif.

"' Application September 27, inas riai No. 61 19 1 Claim. 1

This invention relates to improvements in .knives, and has particular reference to a knife for cutting and scoring linoleum.

The principal object of this invention i to provide a combined knife and scoring tool, wherein all of the usual procedures necessary for fitting linoleum may be accomplished with a single tool, in contra-distinction to the employment of several tools, any one of which may become lost and would, therefore, delay the fitting of the linoleum until the lost tool could. be found or a new one substituted.

A further object is to produce a device of this character which is economical to manufacture and one which is easy to use.

A further object is to provide a tool wherein the customary procedures now employed are exactly the same, thereby eliminating any necessity for the operator learning a new procedure.

Other objects and advantages will be apparent during the course of the following description.

In the accompanying drawings forming a part of this specification and in which like numerals are employed to designate like parts throughout the same,

Fig. 1 is a side elevation of our tool.

Fig. 2 is an end elevation taken from the right of the drawing.

Fig. 3 is a vertical cross-section of the knife as shown in Fig. 1.

Fig. 4 is a fragmentary cross-sectional view, showing the scoring operation when fitting a seam.

Fig. 5 is a fragmentary view showing the scoring operation when using the scriber, as, for instance, in fitting along the edge of a wall.

Fig. 6 is a fragmentary cross-sectional view on an enlarged scale showing the manner in which the scoring pin of the scriber actuates.

Fig. '7 is a cross-sectional view taken on the line 1--1 of Fig. 1 and on an enlarged scale.

Fig. 3 is a fragmentary side elevation showing the use of the ripping knife.

Fig. 9 is a similar view showing the use of the cutting or scoring knife.

In the laying of linoleum it is most important that the linoleum be cut so as to fit either the sides of the walls, or any abutting surfaces. It is also important that the meeting edges of two pieces of linoleum fit without any cracks'being visible.

It is, therefore, essential that the tools used in cutting linoleum perform a very accurate cutting and fitting operation on the linoleum.

It has been customary to provide a plurality of tools, each one of which performs a certain function, and in using such tools it is necessary for the operator to transport a cumbersome kit containing same. If any tool became lost, then it becomes difficult for the operator to complete the linoleum laying operation.

Then, too, if the tools do not cooperate with each other; as for instance, the scoring arrangement on one tool may be too broad for the cutting-knife of the other tool, resulting in an imperfect fit. With our tool, all parts are designed to correspond in size one with the other, resulting in a perfect performance.

In the accompanying drawings wherein for the purpose of illustration is shown a preferred embodiment of our invention, the numeral IE) designate the handle of the tool. This handle is slotted, as shown at H, and is also provided with a slideway l2, in which a scriber-bar slides. This scri-ber bar has a roller l4 and is held in adjustable position by a cam-lock [6.

By viewing Fig. 6, it will be noted that the bar i3 has a cam-slot l 1, in which the end of a scribing-pin, l8, rides. The end of this pin is held against the bottom of the slot I! by a spring 19 confined in a bore 2| formed in the handle ID.

The point, 22, of the pin forms a scoring-point I for use as shown in Fig. 5, which will be described later.

The seam-scriber, as shown in Fig. 4, consists of a pin 23, adjustably held in the handle III by a set-screw 24, the end of the pin extending beyond the flattened surface 26 of the handle and is adapted to enter a recess 21 formed in a scriberplate 28, this scriber-plate having an offset nose 29, adapted to engage the edge of a piece of V linoleum, as, for instance, that shown at A.

The scriber-plate 2? is slideably held to the handle HJ, through the medium of a slot and pin arrangement, the pin being designated by the numeral 3 I.

Mounted in the slot H is a double-ended ripping-knife 32, which is held in the slot through the medium of a pin 33, having a threaded head 34, engaging threads formed in a bore formed in the handle it. This arrangement permits pressure to be exerted by the end of the pin against the ripping-knife.

Also mounted in the slot H is a scoring-knife 36. This scoring-knife is held in adjustable position, as shown in full lines in Figsrl and 3, through the medium of a spring 36', mounted upon the pin 33. l

When the scoring-knife 36 is in scoring position, as shown in dotted lines in Fig. 3, a frictional contact is made with the end of a screw 31, which helps to hold the knife-blade 36 in working position.

It will, therefore, be seen that We have produced a device which will accomplish all of the I objects above set forth.

It is to be understood that the form of our invention herewith shown and described i to be taken as a preferred example of the sameand that various changes relative to the material, size, shape and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope of the subjoined claim.

Having thus described our invention,.we. claim:

In a tool of the character described, a;hand1e 15 1,305821 having a slot formed longitudinally thereof, a pair of knives positioned insaid slot and-secured by a single screw-pin, said pin abutting one of said knives and forming a pivot for the other of said knives.

.Number Name Date. 170;934 Broad-books Dec. 14, 1875 662,005 Lewis Nov. 20, 1900 Madsen June 3, 1919 330,557 Brown Nov. 17, 1885

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