US3399896A - Matrix transformation game device - Google Patents

Description

Sept. 3, 1968 w. M. BURNSIDE 3,399,896

MATRIX TRANSFORMATION GAME DEVICE Filed July 6, 1965 5 Sheets-Sheet 1 Inventor WQIter MQB-urnside Sept. 3, 1968 w. M. BURNSIDE 3,399,896

MATRIX TRANSFORMATION GAME DEVICE 5 Sheets-Sheet 2 Filed July 6, 1965 Inventor wal'ter Burnside 3 jfiHm,/Vay,a& dH-kornelgs P 3, 1968 w. M. BURNSIDE 3,399,896

MATRIX TRANSFORMATION GAME DEVICE 5 Sheets-Sheet 3 Filed July 6, 1965 Inventor wal'l'erM. Burnside 5g, fiWmJvogM-XeW o E o Sept. 3, 1968 w. M. BURNSIDE MATRIX TRANSFORMATION GAME DEVICE 5 Sheets-Sheet 4 Filed July 6, 1965 flu H AMI I I IHWL Fig.8

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Inventor ZUQ Hfer M Ede H-tornegm W. M. BURNSIDE MATRIX TRANSFORMATION GAME DEVICE Sept. 3, 1968 5 Sheets-Sheet 5 Filed July 6, 1965 M P 2... 3 w m eB Mns VMMOM n .lmu, L fi my United States Patent 3,399,896 MATRIX TRANSFORMATION GAME DEVICE Walter M. Burnside, 324 Orchard, Waukegan, Ill. 60085 Filed July 6, 1965, Ser. No. 469,566 10 Claims. (Cl. 273-138) ABSTRACT OF THE DISCLOSURE An amusement device in which specific areas on a game board surface corresponding to particular indicia on a matrix must be operatively connected, as by rolling a ball onto an electrical contact, and wherein a matrix is formed of indicia supported on at least two horizontally reciprocable matrix plates connected to opposite ends of -a lever arm which is reciprocably removable to effect transposition of said matrix plates and rearrangement of said matrix, and which is adapted to have associated therewith a vertically movable matrix plate disposed adjacent a lateral edge of a said horizontal matrix plate and forming a part of said matrix.

This invention relates generally to amusement devices which require the exercise of skill and judgment in the play thereof.

Accordingly, it is a general object of the present invention to provide an improved amusement device requiring the exercise of skill and judgment in the play thereof.

It is another object of this invention to provide apparatus for use in an amusement device whereby a player can selectively transform a set of indicia in a matrix and thereby attain a score which is dependent at least in part upon his skill in selecting a proper matrix.

It is still another object of the present invention to provide apparatus of the foregoing character, wherein interest in the game is stimulated by providing matrix transformation means whereby a players score is determined at least in part by the transformation of one or more sets of indicia forming the matrix.

Still another object of the present invention is to provide apparatus of the foregoing character, wherein the transformation of the matrix is determined in part by random selection means.

Other objects and advantages of the present invention will be apparent from the following detailed description and claims to follow when read in conjunction with the accompanying drawing, wherein:

FIG. 1 is a perspective view of one embodiment of the present invention;

FIG. 2 is a detail of a portion of the invention shown in FIG. 1;

FIG. 3 is a fragmentary front elevational view of a portion of the invention shown in FIG. 1;

FIG. 4 is a fragmentary vertical sectional view taken along the line 44 of FIG. 3;

FIG. 5 is a rear elevational view of the apparatus shown in FIG. 3;

FIG. 6 is a fragmentary elevational view of a component of the apparatus shown in FIG. 5;

FIG. 7 is a vertical sectional view along line 7-7 of FIG. 5;

FIG. 8 is a vertical sectional view taken along the line 88 of FIG. 9;

FIG. 9 is a fragmentary front elevational view of the apparatus of FIG. 1 shown in a different position of adjustment;

FIG. 10 is a diagrammatic view of the electrical circuit of the apparatus of FIGS. 5 and 7;

FIG. 11 is a diagrammatic view of the matrix illustrating the present invention; and

3,399,896 Patented Sept. 3, 1968 ice FIG. 12 is a schematic view of the matrix used in the apparatus of FIG. 1.

As shown in FIG. 1 of the drawing, an amusement device embodying the present invention comprises a random selection device 10 and a matrix transformation apparatus wherein the random selector device 10 comprises a base 11 pivotally supporting between spaced upright members 12, 13 a generally rectangular container 14 preferably having transparent lateral and top walls having a support member 15 spaced above the lower wall thereof. The support member 15 is provided with a plurality of circular openings 16 preferably arranged in rows and adapted to support a small ball 17 therein. The container 14 is divided by a partition member 18 into a large matrix selector chamber 19 and a smaller chamber 20. The support member 15 in the large chamber 19 has twenty circular openings 16 and the smaller chamber 20 has five circular openings 16. Each of the circular openings 16 in chamber 19 correspond to one of the twenty indicia of the matrix 30 comprising the playing field which will be described hereinafter.

Each of the openings 16 in chamber 19 has disposed therein a resilient leaf spring switch 22 (see FIG. 2) which is closed by the weight of the small ball 17 when the ball drops into the opening 16. Each of the switches 22 are electrically connected by suitable electrical conductor means 25 to an indicia map 73 associated with the matrix 30. Switches 23a, 23b and 230 identical in structure to switches 22 are placed in only three of the five openings 16 in chamber 20, and the switches 23a, 23b and 23c are electrically connected with the matrix control mechanisms 82, 83 and 84, respectively, as will be described hereinafter (see FIG. 5). In the form illustrated, five small balls 17 sufficiently heavy to close the switches 22, are placed in chamber 19 and three balls 17' are placed in chamber 20. A random selection of the switches to be closed is made by providing a crank handle 26 journaled in on the upright member 12 and having the inner end thereof fixedly secured to the container 14 for moving the container 14 into an inverted position when the crank 26 is turned and thereafter returning the container 14 to an upright position allowing balls 17 and 17' to drop at random into openings 16 in chambers 19 and 20.

The matrix 30 which comprises the playing field and the matrix transformation apparatus 80 in the form illustrated, form a unit separate from the random selector device 10, although it is entirely possible to combine both these units in a single housing, if desired. As generally shown in FIG. 1 and as schematically shown in FIG. 11, the matrix 30 is comprised of a series of numbers from 1 to 20 arranged in five vertical rows of four numbers each and preferably in a random arrangement. The matrix 30 is disposed preferably in a vertical plane within a housing 31 having a base section 32 provided with a reset control button 33 which operates switches 1010, 10112 and 1010, as will be described hereinafter (see FIG. 10). Three control buttons .34, 35 and 36 shown in FIG. 1 for operating switches 34a, 35a and 36a, respectively, are placed on the front control panel portion 37. The matrix transformation apparatus 80 is preferably hingably mounted at the rear of the matrix 30 within the housing 31.

As best shown in FIGS. 3, 4, 8 and 9, the matrix 30 is mounted in a generally rectangular open frame section 40 having top and bottom walls 41, 42, and lateral walls 43, 44 with outwardly turned flanges 45, 46 for attaching a masking matrix plate 47 on the front of the frame section 40. The frame section 40 is preferably hingably connected at the upper and lower edge of side wall 44 to a back plate member 48 on which the illumination and control mechanism are mounted. Between the lateral walls 43, 44

3 and adjacent the top and bottom thereof are mounted two sets of guide rods 50, 51 and 51, respectively, with rods 50, 50' being disposed outwardly and forwardly of rods 51, 51'.

A pair of spaced preferably transparent plastic matrix plates 52, 52 are slidably mounted on rods 50, 50 for re ciprocal transverse movement thereon by means of top and bottom brackets 53, 54 and 53', 54, respectively. Each of the plates 52, 52' has one vertical row of the indicia forming part of the matrix 30, which in the present embodiment comprises the four numbers 18-11-15-16 and 1743-19-10, respectively, printed on a surface thereof. Each of the plates 52, 52 is connected through bottom brackets 54, 54, respectively, to the lower end of lever arms 55, 56, respectively. The lever arms 55, 56 are pivotally mounted at about their midpoint on the back plate 48 and are operatively connected to the matrix transformation control mechanisms 82, 83, respectively.

A second pair of normally spaced preferably transparent, plastic matrix plates 57, 57 are slidably mounted on rods 51, 51 for reciprocal transverse movement thereon by means of brackets 58 and 58, respectively. Each of the plates 57, 57 is connected through brackets 58, 58 to the upper end of the lever arms 55, 56. The plates 57, 57' each has a vertical row of the indicia forming a part of the matrix 30 and in the present embodiment consists of the four numbers 48l-l4 and 9-6-2-3, respectively.

Disposed between the spaced indicia plates 57, 57' and forming the center row of the matrix 30 is an elongated preferably clear plastic matrix plate 60 which is mounted for vertical reciprocal movement between upper and lower guide means 61, 61 fixedly mounted on upper and lower walls 41 and 42 respectively (see FIG. 8). Secured to one edge of the plate 60 at about the midpoint thereof is a bracket 62 which extends rearwardly and is operatively connected to a lever arm 63 which is in turn connected with matrix control mechanism 84. A stop member 64 is mounted on the upper edge of the plate 60.

Mounted on the back plate member 48 and disposed behind the matrix plates is an illuminating means for lighting the randomly selected numbers of the matrix. The illuminating means 70 is comprised of an electrical lamp socket support means 71 mounted on a plurality of studs 72 extending forwardly from the plate member 48. The support means 71 has five vertical rows of electric lamp sockets arranged in four horizontal rows corresponding with the normal position of the indicia on the matrix plates forming the matrix 30 so that an electric lamp 73 is disposed behind each indicia or number forming the matrix 30. A light shield 74 is disposed in spaced relationship with v and immediately in front of the lamps 73. The shield 74 has an outwardly tapering passage 76 concentric with each of the lamps 73. A translucent plate 77 is mounted on the front surface of the shield 74 and held in position by flanges 79, 79' along the upper and lower edges so as to provide diffuse lighting for the indicia of the matrix 30. The translucent plate 77, shield 74, lamp support means 71, and the back plate member 48 each has formed therein a vertically extending elongated opening 78, 78a, 78b and 780, respectively, to accommodate the lever arm 63 which reciprocably moves the plate 60.

The back surface of plate 48 has mounted thereon the matrix transformation apparatus 80 which is comprised in the form illustrated of three independently operable matrix control mechanisms 82, 83 and 84 which are directly connected to the matrix plates, 52-57, 5257 and the matrix plate 60, respectively, to effect reciprocable movement thereof, as will be described hereinafter. The matrix control mechanism 82 controls the reciprocable movement of the matrix plates 52 and 57 by means of the lever arm 55.

The matrix control mechanism 82 is comprised of an electric drive motor 85 having suitable reduction gears for driving a generally circular cam 86 with two recesses 87, 88 formed on its periphery and spaced 180 degrees. The

outer end of the arm 89 of a resilient leaf switch 90 rides on the surface of the cam 86 and maintains the switch 90 open so long as the arm 89 remains in one of the recesses 87, 88. A pin 91 fixed to the cam 86 is connected to the lever arm 55 through link 92 for effecting periodic reciprocal movement of arm 55 when the cam 86 rotates. A second link 94 extends from the lever arm 55 to a wiper support arm 95 which is pivotally mounted on the back plate 48 for reciprocable movement in response to the reciprocating movement of arm 55. Electrically insulated preferably resilient wiper fingers 96 preferably arranged in pairs are mounted on the upper support arm 95 with a total of one wiper finger for each of the eight indicia on the matrix plates 52, 57, plus one additional terminal wiper finger 97. The upper fingers 96 are mounted so as to engage electrically isolated contact points or rivets 98 mounted on a commutator plate 100 with each of contact points 98 being electrically connected to one of the indicia lamps 73. The terminal wiper finger 97 is adapted to engage the contact point 99 which is electrically connected to the reset switch 101b, as will be described hereinafter. The matrix control mechanism 83 is identical in construction to mechanism 82, with the control mechanism 83 being in effect a mirror image of control mechanism 82.

And, since the matrix control mechanism 83 is identical in construction with mechanism 82 above described, the

parts of mechanism 83 are designated with the same numher as used for mechanism 82 with a prime indicia being added thereto.

The matrix control mechanism 84 which reciprocally moves the matrix plate 60 is mounted on a plate secured to back plate 48 so as to extend perpendicularly thereto and disposed between the control mechanism 82 and 83. An electric drive motor 111 with suitable reduction gears is mounted on plate 110 and is operatively connected to effect rotation of a generally circular cam 112 having four equally spaced notches 113 on the peripheral surface thereof. The outer end of arm 114 of a resilient leaf spring switch 115 contacts the surface of cam 112 and switch 115 is normally held open so long as the outer end of arm 114 remains in one of the notches 113. A link 117 has one end secured to a pin 116 mounted on the cam 112 with the other end of link 117 secured to the lever arm 63 which has its rear end pivotally mounted on the plate 110, as at 120. When cam 112 is rotated the forwardly extending portion of lever arm 63 is moved reciprocably. Also secured to the lever arm 63 is a second link 121 which is connected to a wiper support arm 122 pivotally mounted on plate 110 for reciprocable movement in response to the movement of arm 63. A spring 65 normally pulls the link 121 and arm 63 upwardly to counteract the weight of the plate 60 mounted on the end of arm 63. The wiper support arm 122 carries four electrically isolated wiper fingers 123 and one wiper finger 124 preferably spaced from the fingers 123. Each of the four wiper fingers 123 are adapted to engage electrically isolated contact points or rivets 125 mounted on commutator plate 126 with each of the contact points 125 electrically connected with one of the matrix lamps 73 illuminating the indicia on plate 60. The wiper finger 124 is adapted to contact either one of two spaced contact points 127 which are electrically associated with the reset switch 101a.

FIG. 10 of the drawing shows schematically the diagram of the electrical circuit of the matrix transformation apparatus 80. The circuit includes a transformer 130 having a primary winding 131 and a secondary winding 132. The primary winding 131 is connected through a conventional on-off switch which can be connected to a conventional 110 volt wall outlet. The secondary winding 132 is connected preferably through a fuse to two electrical power lines 135, 136. The contacts of the reset switches 101a, 101b and 1010 are connected across the line 135 and 136 in series with wiper fingers 124,

97 and 97, respectively, and electric drive motors 111, 85 and 85, respectively.

In parallel with the reset switches 101a, 101b and 1010 and the associated wiper contacts and extending in series across the power lines 135, 136 are the electrical drive motors 85, 85' and 101 and three sets of normally open switches which control these electric motors for transforming or shifting the matrix plates 52-57, 5257 and 60, respectively. For example, while switch 23b is normally open, it can be closed by a ball 17' dropping into the associated opening 16 in chamber 20 and then but only then will it be possible to energize motor 85 by closing the normally open switch 35a when control button 35 is depressed. Similarly, motor 85' will be energized by the closing of switches 23c and 36a. Motor 111 will be energized by the closing of switches 23a and 34a.

The ball switches 22 of chamber 19 and the wiper fingers 96 are connected in series to line 135, and the rivets 98 associated are connected to the line 136 through a matrix lamp 73. The illuminated numbers in the matrix 30 will always be the numbers having balls depressing the switches 22 associated therewith, regardless of the reciprocable positions of the wipers.

In operation with electrical power applied to lines 135 and 136, the player first presses reset button 33 in order to move each of the matrix plates 52, 52, 57, 57 and 6!) into their predetermined starting position in the matrix 30. In the event one of the wiper support arms 95, 95' or 122 is in a 'reciprocable position which places one of the end wiper fingers thereof in electrical contact with one of the special contact points designated 99, 99' or 127, respectively, thereby indicating that the associated matrix plates is out of its normal starting position, the electric motor 85, 85' or 111 will be energized and the cam associated therewith rotated. For example, assuming the matrix plates 52, 57 are out of their starting or home position, and the upper wiper finger 97 is in contact with the rivet 99, when the reset switch 33 is pressed, the switch 101]; will be closed and the motor 85 will begin rotating cam 86. As soon as the end of the arm 89 of the switch 90 is moved out of the recess 87 on the surface of the cam 86, the switch 90 will be closed and will remain closed for one-half a revolution of cam 86 and While closed will continue to energize the motor 85 even after the reset button 33 is released and the switch 101b opens. The switch 90 will remain closed until the end 89 drops into the recess 88 of cam 86 after one-half revolution of the cam 86. While the cam 86 is making its half revolution, the lever arm 55 reverses the relative position on the matrix plates 52 and 57, returning these matrix plates to their home position. Simultaneously, the lever arm 55 through the link 94 reciproca'bly moves the wiper support 95 so that the wiper finger 97 is moved out of contact with the rivet 99 and to an unwired rivet or, if desired, an open space on plate 100. Where the matrix plates 52-57, 52-57' or 60 are already in their home position, the electric motor ope'ratively associated therewith will not be energized, as will be evident from FIGS. 5 and 10 of the drawing.

Assuming that all the matrix plates are in their home position, the operator then rotates handle 26 to remove all of the balls 17 from the openings 16 in chambers 19 and 20. On further turning the handle 26, the balls 17 will fall at random into the openings or holes 16 therein to close certain of the switches. When, for example, the switches 22 correspond to the number 1816-7l93 of a matrix 30 are closed, electric current will flow through the wipers 96, 96 and 123 and contact points 98, 98 and 125, respectively, and energize the matrix electric lamps 73 disposed behind each of the said numbers.

It is assumed for the purpose of this illustration that the matrix 30 is comprised of numbers 1 through 20 arranged in the pattern shown in FIG. 11, and that the matrix masking plate 47 disposed thereover has the configuration and design shown in FIG. 12. It should also be understood that the indicia appearing within the circles in FIG. 12 do not represent the numbers of the matrix 30, but designate the color and position of the opening within a given color zone of the masking plate. For example, Y represents position one in the yellow zone, B represents position two in the blue zone, R represents position three in the red zone, G represents position four in the green zone, and W represents position one in the white zone.

It will be apparent that when the numbers l8-7-l9- 163 are illuminated by the lamps 73 with all the matrix plates in their home position, the player will have numbers 18 and 3 in the yellow zone (Y and Y position), numbers 7 and 19 in the green zone (G and 6.; position) and number 16 in the white zone (W position). If it is the object of the game to get as many members in a single color zone as possible (as is assumed for this example), all four of the numbers 18-7-19-3 can be placed in the red zone and number 16 placed in the blue zone, if each of the matrix plates can be moved to alternate position. Thus, it switches 23a, 23b and 230 are closed by having a ball 17' in each of the corresponding openings in chamber 20, the motors 111, and 85' can be energized by the operator depressing control buttons 34, 35 and 36, respectively, thereby closing switches 34a, 35a and 36a, respectively. With the motors 85, 85' and 111 energized, the cams 86, 86 and 112 are rotated onehalf revolution and move the matrix plates 52, 57, 52', 57 and 60 from their normal or home position as shown in FIG. 3 to the positions shown in FIG. 9.

As the cams 86, 86' and 112 move lever arms 55, 56 and 63, respectively, these lever arms simultaneously shift the energized wiper fingers to the next adjacent contact point 98, 98 and 125, respectively, causing the matrix lamps initially associated with the numbers l87l9163 to go cit and the lamps behind the numbers 187-19- 16-3 in their new transposed positions to go on. In this way, any of the numbers of the matrix can be illuminated in their home position and when these numbers are physically transposed in the matrix, the matrix lamp circuits associated with these numbers are at the same time electrically transposed by the simultaneous movement of the associated wiper fingers so that no matter in which of the reciprocable positions into which the numbers are moved the same numbers will remain lighted and all other numbers will remain dark.

If two of the three balls 17 in chamber 20 do not drop in the holes 23a, 23b or 230, thereby closing only one of these switches, only the matrix control mechanism which is electrically associated with the closed switches can be actuated by depressing one of the control buttons 34, 35 or 36. As a result, only one of the above described transformations will be possible. For example, if only the switch 230 is closed, the operator will be able to transpose only the matrix plates 52' and 57 but no others, and thereby moving numbers 19 and 3 from the green and yellow zones, respectively, into the red zone. However, unless having two numbers in the red zone is of greater value than having two numbers in the yellow zone and two numbers in the green zone, it would not be advantageous to transpose plates 52 and 57, and the player would have his maximum score without transposing plates 52 and 57'.

It will be understood by those skilled in the art that the present invention is not restricted to using a matrix or matrix masking plate of the size or arrangement shown in FIGS. 10 and 11 and that if the matrix size and arrangement is changed, the arrangement of the electrical circuits, the matrix masking plate and the matrix control mechanism could be altered accordingly without, however, departing from the principle of the present invention as hereinafter claimed.

I claim:

1. In an amusement device apparatus which includes a playing field having a matrix formed of a plurality of individual indicia wherein some of said indicia are supported on-one matrix plate and other said indicia are supported on another matrix plate with said matrix plates adapted to be relatively movable to effect a rearrangement of said indicia forming said matrix, and control means for effecting relative movement of said matrix plates, the improvement comprising; control means having a frame section supporting on horizontal guide means at least two horizontally reciprocable matrix plates, one said horizontally reciprocable matrix plate being secured to the upper end of a lever arm pivotally mounted on said frame section intermediate the ends thereof and the other of said horizontally reciprocable matrix plates being secured to the lower end of said lever arm, and electrical means for reciprocably moving said lever arm; whereby said matrix plates can be reciprocably horizontally moved to effect a rearrangement of the indicia forming said matrix.

2. An apparatus as in claim 1, wherein a wiper support arm is operatively connected with said lever arm for reciprocable movement thereof in response to the reciprocable movement of said lever arm, and said wiper support arm having a plurality of wiper fingers mounted thereon which are adapted to slidably contact electrical contacts operatively associated with said indicia on each said reciprocable matrix plates; whereby any indicia on said matrix plates can be electrically activated in any of the reciprocable positions of said lever arm.

3. An apparatus as in claim 1, wherein said matrix has associated therewith electrical illuminating means for individually illuminating each of said indicia, and a random selection means interposed between said electrical illuminating means and a source of electrical power to effect an operative connection therebetween for illuminating a limited number of said indicia; whereby certain of said indicia can be illuminated while others of said indicia are not lluminated.

4. An apparatus as in claim 1, wherein said electrical means for reciprocably moving said lever arm comprises an electrical motor having operatively connected therewith a rotary cam member which has formed on a surface thereof an elevated portion between spaced recessed portions with electrical switch means in contact with said surface portion, said switch means remaining open when a part of said switch means moves into one of said recessed portions on said surface and remains closed while in contact with said elevated portion, and a link member having one end connected to a peripheral portion of said cam and having the opposite end of said link member connected to said lever arm; whereby said lever arm is reciprocably moved when said cam member is rotated.

5. An apparatus as in claim 4, wherein said electrical means has interposed between said motor and an electrical power source for said motor a random selecting means for effecting an operative connection between said motor and said source of power.

6. An apparatus as in claim 4, wherein said electrical means has interposed between said motor and an electrical power source for said motor a random selecting means for effecting an operative connection between said motor and said source of power.

7. Apparatus as in claim 1, wherein said control means has in combination therewith a frame section supporting a vertical guide means, at least one vertically reciprocable matrix plate having indicia thereon disposed adjacent a lateral edge of one of said horizontally reciprocable matrix plates and forming a part of said matrix, said vertical reciprocable matrix plate being operatively secured to the outer end of a second lever arm pivotally mounted at the opposite end on said frame section, and electrical means for :reciprocably moving said second lever arm; whereby said vertical reciprocable matrix plate can be moved relative to said one said horizontally reciprocable matrix plate to effect a further rearrangement of the indicia of said matrix.

8. An apparatus as in claim 7, wherein a wiper support arm is operatively connected with said second lever arm for reciprocable movement thereof in response to the vertical reciprocable movement of said second lever arm, and said wiper support arm having a plurality of wiper fingers mounted thereon which are adapted to slidably contact electrical contacts operatively associated with said indicia on said vertically reciprocable matrix plate; whereby any indicia on said matrix plate can be electrically activated in any of the reciprocable positions of said second lever arm.

9. An apparatus as in claim 7, wherein said matrix has associated therewith electrical illuminating means for individually illuminating each of said indicia, and a random selection means interposed between said electrical illuminating means and a source of electrical power to effect an operative connection therebetween for illuminating a limited number of said indicia; whereby certain of said indicia can be illuminated while others of said indicia are not illuminated.

10. An apparatus as in claim 7, wherein said electrical means for reciprocably moving said lever arms comprises an electrical motor for each lever arm, each electrical motor having operatively connected therewith a rotary cam member which has formed on a surface thereof an elevated portion between spaced recessed portions with electrical switch means in contact with said surface portion, said switch means remaining open when a part of said switch means moves into one of said recessed portions on said surface and remains closed while in contact with said elevated portion, and a link member having one end connected to a peripheral portion of said cam and having the opposite end of said link member connected to said respective lever arm; whereby each said lever arm is reciprocably moved when the respective said cam member is rotated.

References Cited UNITED STATES PATENTS 2,932,517 4/1960 Hooker et al. 3,034,790 5/1962 Breitenstein. 3,120,657 2/ 1964 Hooker.

ANTON O. OECHSLE, Primary Examiner.

A. W. KRAMER, Assistant Examiner.

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