US2103217A - Cutting apparatus - Google Patents

Description

Dec. 21, 1937. w. H. FORD CUTTING APPARATUS Filed Oct. 17, 1936 IINVEMTOR. 12 2626 mam BY wt X' TORNEYI Patented Dec. 21, 1937 UNITED [STATES PATENT oppicg v 2,103,217 r UUTTING APPARATUS William H. Ford, East Longmeadow, Mass., as

signor to Milton Bradley Company, Springfield, Mass., a corporation of Massachusetts Application October 1'7, 1936, Serial No. 106,100

* 2 Claims. (Cl. 164-44) This invention relates to improvements in cutwards knife 4. At the same time an adjustable ting apparatus and is directed more particularly bolt 23 extends through the rear end part of to improvements in paper-cutting devices. knife l2 and has its inner end in engagement It is one of the principal objects of the invenwith a cam surface 2! provided on bracket 20.

5 tion to provide a novel cutting device which in- The bolt 23 and cam surface 2| are arranged to 5 cludes a pair of co-acting shearing members, one -Op ate W Spring 24 bring about the of which at least is movable, and means to urge p p Shearing action of the knives when he the movable member out of shearing relation ,movable knife is swung w d ywith the other member. The construction of It will be appreciated that it is necessary to the invention is simple. in form so as to be ecomove the knife I2 upwardly after each downward 10 nomicalto manufacture and easy and efllcient shearing stroke. It is one of the featuresof this in operation and is so arranged as to obviate the v on t means iS provided whereby the likelihood of the operators becoming injured. fe I? ail yv lifts p y W n Various other objects and advantages of the sed er Shearing-- l5 invention will become more apparent after a T0 t e I p o a Separate 0011 Spring reading of the following description and refermember 28 which surrounds shaft 22 and is prefence will be had to the accompanying drawing erably disposed between the bracket Zeand rear wherein: end part of the knife 12. This spring 28 has one Fig, 1 is a plan view of the device of the invenend part 30 secured to the bracket -01 base. 2

20 tion; and its other end 29 in engagement with the knife 20 A Fig. 2 is a side elevational view of the device i W th s arrangement, the downward shown in Fig. 1; and strokes of the lever set up tension in spring 23 Fig. 3 is a partial plan view on an enlarged which urges the knife member 12 upwardly out scale to explain certain details of construction. of shearin relation W n dthe invention will be fully described. substantially selfd moves upwardly A base or supporting member 2 is provided and out of the way after the knife l2 has done its this preferably consists of a table-like member work. This leaves the operator. with both hands having a substantially flat surface for supportto work with and does away with the possibility A 30 ing the paper or other material which is to be of injury. The adjustment is such and the parts 30 cut. A stationary knife member 4 is associated are so arranged that the strokes are smooth and with the s pp e r and i y be accurate with a minimum of objectionable friccured thereto as by screws 6 or the like along 21. tion. p marginal edge of the base 2, as shown. While I have described the invention in great If desired the base or board member 2 may detail and with respect to apreferred form there- 35 have legs 8 as shown. It is usual to associate of, it is not desired to be limited thereto since with the support a rule Ill such as shown but many changes and modifications may be made this does not comprise an essential part of the therein without departing from the spirit and invention. r scope of the invention. What ,it is desired to 40 A movable knife member 112 is provided and claim and secure by Letters Patent of'the United 40 this is arranged for moving into and out of States is: r

shearing relation with the stationary knife as 1 A tt device of th ciass describedcom- Will pp It has a Cutting e i3 and may prising in combination, a support, a stationary have a hand e 14. knife on'said support, a rotatable and reciproca- A bra k t 0 s ss a w t base 2 and ble shaft associated with said support, a mov- 45 there is a shaft 22 rotatable therein. The shaft abl knife carried by said shaft for swinging carries the knife member l2 So that the latter downwardly. towards said stationary knife and s ine ly eennected t0 the base for Swinging upwardly away therefrom as said shaft rotates, between a pp non-Shearing Position and a coil spring extending around said shaft and ower S g DOSitiOH- A p maybe D urging the shaft to reciprocate in one direction 50 Vided to limit the downward movement of the to bring said movable knife against said stationmember 12. ary knife, and another coil spring extending I p e a ly p o a spring uc as 24 around around said shaft having a part in engagement shaft 22 and between an a d P 26 and with said movable knife urging the knife upward- 55 b a et for urging t knife i2 inwardly ly and outwardly away from said stationary knife, 55

Referring now to the drawing more in detail It will be seen that in this way the knife is 25 a shaft rotatable and reciprocable in said bracket, a movable knife carried by said shaft for swinging downwardly towards said stationary knife as said shaft rotates in one direction and upwardly away therefrom as said shaft rotates in an opposite direction, a coil spring around said shaft urging it to reciprocate inwardly and move said movable knife inwardly against said stationary knife, and another coil spring around said shaft having a part in engagement with 7 said movable knife urging the knife upwardly and outwardly away from said stationary knife, all adapted and arranged whereby said movable knife is automatically caused to act against said stationary knife as the former is moved downwardly by manual engagement therewith and to move upwardly out of engagement with said stationary; knife when released from manual engagementl WILLIAM H. FORD.

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