US 2260415 A
Description (OCR text may contain errors)
Patented Oct. 28, 1941 UNITED STATES PATENT OFFICE Abplication January 15, 1940, Seiial N0. 313,929
My invention relates 130 improvements in a detachable type book marker.
One of the objects of my invention. is 120 pro vide a flexible type book marker which can be inserted between the pages of a book and which does not require any separate fastening means tohold it in place.
Another imporoant object of r'ny inventionis to shape the book marker in such a way that its natural resiliency holds it secure1y in p1ace, and yet When it is desired 1:0 remove it from between certain pages and p1ace it in another place in the book, the same resiliency permits it to be removed without damage 130 the structure.
Another important object of my invention is 130 provide a resiliently formed book marker so thatit can be removed without bending the hdoks by which it is held 130 the top and' bottom edges cf the binding.
A further object of my invention is to pi=ovide a book marker which can be manufactured ab a 10W price and. which is completely se1f-contained.
With markers of ohe prior art, such as in my ear1ier patent, N0. 1858,605 it has been necessary to provide means for holding the marker in the book. Also with many of the markers of the prior art of this general type it has been necessary 130 thread through ho1es or s1ots a rubber band or other flexible securing member.
In the accompanying drawing, forming a part of this specification, and in which like numerals are employed to designate 1ike parts throughout the same:
Fig. 1 is a view in perspective showing an opened book having a sing1e marker in place therein;
Fig. 2 is a plan view f a marker with a portion of the book shown in dotted 1ines;
Fig. 3 is a modified form of the marker;
Fig. 4 is a furoher modification in form;
Fig. 5 is a still further modification; and
Fig. 6 is still another modification.
In certain uses to which books are put, it is sometimes desirable to have as many as thirty markers placed between as many selected pages of a book. These markers are placed in the books one at a time and sometimes more than one marker is placed between one given pair of pages. It is therefore necessary to provide means for setting the markers in place whieh Will not require the bending 0f the means which holds them in the book.
In the drawing, B represents a book having the usua1 covers C and pages P. At the back is the binding N which provides shoulders I I ab the top and bottom. These shoulders extend across the fu11 Width of the back of the book.
My invention is designed. 170 take advantage of the presence of these shoulders and by using them as an anchoring means, I can dispense with the usual separate securing means heretofore used.
The marker proper comprises the base membei I2 having -hooks I3 formed ab each end to engage the edges of shoulders I I of the binding. T0 the base member er connecting bddy portion I2are' secured marker or indicia bearing extensions I5 which bear suitable reference numerals. These usuall'y have numerals from 1 to 30 ab the ends Which project beyond theedges of the pages P.
The important thing about the presentiri vention is that the connecting body portion I2 has a continuous web I6 ofiset frbm asubstantia1ly straight line I'I connecting the 'engaging members I3, so as to provide anon-continuous connection 01' area betweenthe hook membzrs I3'. Another way ofsatihg this is as followsr' The body portion I6 is cut away from the straight 1ine I'I connecting the hooks I3. The purpose of this is to permit the hooks I3 be disengaged from the shoulders I I Without requiring bending of the hooks I3. Pulling 011 either or both hooks I3 causes a lengthening of the space between ehe hooks, and this is permitted by the ofiset connecting body portion I6 which usua11y bends or twists a little as I;he hooks I3 are separated. (See dotted lines in Fig. 2.) The natural resiency of the connecting body member I6 causes the marker 110 flatten as soon as the hooks I3 are released and they assume their regular spacing in engagement with the shoulders I I on the back end of the book. When the book is c1osed, the leaves hold the connecting body portion IG flat so that hooks I3 will not separate and become displaced.
When it is realized. that there are usually up to 30 of these markers p1aced in a book not over an inch thick, the facility with which a marker of this present type canbe taken out and replaced in the book Will be appreciated.
The present invention lends itself many different shapes for the connecting body portion I6 and. it is noo intended that the ones illustrated for the purpose of explaining the invention sha11 be the en1y ones to be covered by the c1aims. In Figs. 3 to 5 I have illustrated other forms Which the connecting body portion may hake.
In Fig. 3 instead of being an arcuate member as in Fig. 2, the connecting body portion is formed by a straight member 20 and right angle members 2I and 22 connected to the hooks I3. The oflset connecting member 20 a1lows the hooks I3 to be spread apart the distance necessary to place them over the shoulders II. The natral resiliency cf the material used, Usually Celluloid or a similar product, will cause I;he marker 130 resume its normal fiat shape as soon as the user releases I;he hold on the hooks I3. 1
In Fig. 4, the connecting body portion 23 is substantially solid except that itwill have one or two slits 24 and 25 or even mor slits which will giVe the necessary freedom of movement to hooks I3 When t hey are pulled by the one using fl 1 e marker. In Fig. there is a further modificatiou in portion, and inwardly facing opposed hooks carri ed by' and extending divergently beyond ehe ends of the body portion for engaging the upper Which the indicia bearing extensi0n I5 i5 formed integral With the lower hook I3 and the portion of the connecting body 26. The 'upp6r hook I3 and the other portion cf the connecting body 21 are joined to body 26 byan ofiset arm 28 and 30.
This gives an unconnected p1ace or slit 3 I so that the hooks I3 can bespread apart for insertion er removal from the binding 0f thebook.
From these modifications, as wel1 as from the structures shown in Figs. 1 and 2 it will be seen that the essential thin'g is for the ends or hooks I3 to be separated further apart as shown in dotted lines in Fig. 2, simply by pulling=them apart, which causes th connecting body portion I6 to I:Wist s1ihtly and pu]1 in towards the imaginary dotted line I1.
The amount cf offset of distance between the connecting body portion I6 and the imaginary 1ine I'I connecting the hooks can be varied -to suit the design-ers choice. It is only necessary that it be enough to allow sflicient separation of the hooks I3 for them to be easily'applied over the shoulders II and I2. The same thing can be said with regard to the Slits 24 and 25 in Fig; 4 and 31 in Fig. 5.
In Fig. 6 the marker comprises the base memher 40 having hooks I3 formed at each and to enandlower edges of a hook backing, the hooks being substantially laterally and longitudinally displaced from the body portio n f0r separation 'thereof from tlie hook backing through trans verse fiexing of'the body portion, toward said hook backing.
2. A hook marker' comprising an elongate d normally flat body portion which 1's bow-shaped in the plane thereof, inwardly facing opposed hooks carried by the ends of the body member and extending in opposite direct1'ons beyond I7he concave edge thereof for engaging the upper and lower edges 0f a hook backing and an indicia b'earing extension carried by the bow-shaped body portion and projecting from the convex edge thereof.
3. A hook marker comprising a normally flat arcuate body portion in the form o1 a thin strip of uniform width substantially throughout its arcuate extent,- the ends of the ar'cuate body portiori merging into extensions cf reduced width and diverging from the concave edge of the body portion, inwardly facing opposed hooks on I:he ends of the extensions for engagingthe upper and lower edges of a hook backing, and an 'indicia bearing extension secured to the body portion and projecting from the convex edge thereof,
GEORGE B. VON ALVENSLEBEN.