US3160956A - Pantograph - Google Patents

Description

Dec. 15, 1964 P. A. MERCORELLI PANTOGRAPH 2 Sheets-Sheet 1 Filed Sept. 27, 1962' I INVENTOR ATTORN EY Dec. 15, 1964 P. A. MERCORELLI PANTOGRAPH 2 Sheets-Sheet 2 Filed Sept. 27, 1962 INVENTOR M A. MM BY ATTORNEY Unified t nt o PANTOGRAPH Pasquale A. Mercorelli, 441 summer Ave, Newark, NJ. Filed Sept. 27, 1962, Ser. No. 226,586 1 Claim. (Cl. 33-25) The invention relates generally to pantographs, and particularly to such an article arranged for assembly and reassembly with keyed corresponding parts.

It'is an object of the'invention to provide a pantograph which may be easily disassembled and reassembled.

It is a further object of the present invention to provide apantograph which may be simply and easily adjusted to different ratios.

Yet another object of the invention is to provide a pantograph wherein both the master to be copied and the copy sheet are held in fixed relation to each other.

Yet another object of the invention is to provide a pantograph in which all of the arms are of light construction and are supported against sagging at both ends.

These objects and advantages as Well as other objects and advantages are attained by the device shown by way of illustration in the drawings in which:

FIGURE 1 is an exploded view of the pantograph arms, pivots, and supports separated from the table;

FIGURE 2 is a'perspective view of the complete pantograph assembly;

FIGURE 3 is a top plan view of the pantograph assembled with copy and object sheets in position for copy- Referring now to the drawings in detail, the pantograph illustrative of the invention has a table 11 which is preferably madeof plastic material to form a light, inexpensive shell. The table 11 is provided with a depression 12; this area is preferably rectangular and dimensioned to receive a sheet of paper 13 upon which an image is to be drawn. The table 11 is provided with an offset portion 14 or extension. This offset portion is provided with several pivot holes 15, 16, 17.

The outer pivot hole or socket 15 is provided with a circular base margin; the middle pivot hole or socket 16 is provided With a square base margin 18, and the inner pivot hole 17 or socket is provided with a diamond-shaped base margin 19. A first arm 20 is provided. There is a pivot pin 21 at one end which is readily insertable in any of the table sockets 15, 16, 17. The other end of the first arm 20 has an integral support 22 on the bottom which is sufiiciently long so that when the pivot pin 21 is inserted in a socket, the support 22 will sustain the arm in a generally horizontal position by resting on the surface upon which the table 11 rests. The top of the arm 20 is provided with a pivot pin 23 above the support A second arm 24 is provided which has a socket 25 at one end to pivotally engage the top pin 23 in the first arm 20. The opposite end of the second arm has a stylus socket 26 at the end of an offset portion 27. A stylus 28 is provided; it has a central annular rib 29 so that When the stylus 28 is inserted in the socket 26 in the second arm 24, it will support that arm 24 in a generally horizontal position and will rest on the same surface that the table 11 rests on. The middle portion of the second arm 24 is provided with several sockets. The outer socket 3t closest to the stylus socket has a circular identifying base margin. The middle socket 31 has a square base margin 32; and the inner socket 33 has a diamond-shaped base margin 34.

A third arm 35 is provided. It has a socket 36 at one end for a marker 37. The marker has an annular central rib 38 so that when it fits into the socket 36 in the end of the third arm 35, it will rest in depression 12 and support the third arm 35 in a generally horizontal posi- 3,160,956 t Des: 1 1 964 t ion. The top end39 of the marker 37 extends upwardly above the third arm 35 and is dimensioned to receive a fourth arm 40. The opposite end of the third arm 35 has several pivot pins 41, etc. These pins 41, 41, 41 on the bottom of the arm, are distinguished from each other by corresponding markings on top of the third arm. The outer pivot pin is identified by a circular design 42 on the top of the third arm 35. The middle pivot pin is identified'by a similarly placed square design 43. And the inner bottom pin is identified by a top diamond'design 44 on the third arm 35. The pins '41 are engageable with three sockets 45 on the top middle portion'of the first arm 26. These sockets 45, etc. are distinguishable a circular design, the next socket 45 has a square base margin design 46, and the next has the diamond base design 47. c K

The fourth arm 40 has a socket 48 or pivot hole at one end; this socket 48 fits over and pivots on the top-end 39 of the marker 37 at the end of the third arm 35. The other end of the fourth arm is provided at the bottom with three pivot pins 49, 49, etc. On the top of the fourth arm 40 above each pivot pin, there is an identifying top marking; above the outerpin is a diamond marking design 50; above the middle pin there is a square design marking 51. And above the inner pin, there is a round design marking 52.

The bottom of the marker 37 is provided with a graphite stick or insert 53. When the arms are assembled, the pivot pins are inserted in sockets which correspond with the socket into which the pivot pin on the first arm is inserted. Thus, if the pivot pin 21 is inserted in theround socket 15 in the table 11 which has the circular identifying base margin, all of the pivot pins-which are identified by a top round marker are selected for insertion in sockets having the circular base marking. On the other hand, if the pin 21 on the outer end of the first arm 20 is inserted in the socket 16 with the square margin 18 on the table 11, the pins 41, 49 identified with a square top marking 43, 51 are inserted in the sockets having the square base margin 32, 46. The same is done for the' diamond markings 34, 44. The socket 25 in the inner end of the second arm 24 and the chosen pin in the outer end of the third arm 35 are pivotally inserted in the socket in the top of the first arm 20, before the ends of the fourth arm 40 are applied to the tops of the second and third arms 24, 35.

The relation of the pivot pins 41, 4? tothe sockets 45, 30, 31, 33 is critical, but the insertion of pin 21 in any of sockets 15, 16, 17 in the table 11 is not. Insertion in any particular one of the latter three sockets 15, 16, 17

is merely useful as a reminder which socket is being,

utilized. Note that in FIGURES 2 and 3, pin 21 is in the square sockets although round pin 42 is in round socket 45 and round pin 49 is in round socket 30.

The table has a pair of holders 54 with rubber pressure pads 55 adapted to engage a design 56 to be traced in a fixed position. When a piece of paper 13 is inserted in the depression 12, in the table 11, and a design 56 V placed under the holders .54, 54, the stylus 28 is manipulated to foilow the design 56, a corresponding tracing 57 is made by the graphite stick 53 of the marker 37. The whole pantograph may be easily assembled and disassembled. The clues to reassembly are readily present in the coded or marked sockets and pins.

The foregoing description is merely intended to illustrate an embodiment of the invention. The component parts have been shown and described. They each may have substitutes which may perform a substantially similar function; such substitutes may be known as proper substitutes for the said components and may have actually been known or invented before the present invention;

these substitutes are contemplated as being within the scope of the appended claim, although they are not specifically catalogued herein.

What is claimed:

A pantograph comprising:

(a) a table having a generally rectangular depressed area dimensioned to receive a sheet of drawing paper,

(b) an ofiset portion on the. table having a row of sockets positioned generally coincident with a line extending along one side of the depressed area,

() a first arm pivotally engaged at one end with one of the sockets in the offset portion, the first arm having a series of sockets intermediate its ends,

(d) a support on the other end of the first arm, ex-

tending transversely therethrough,

(e) a second arm pivotally engaged at one end with the top of the support of the first arm, the second arm having a series of sockets intermediate its ends and a support socket in its end opposite the first arm,

(1) a support engaged with the support socket on'the second arm and also extending above the second arm to define a manipulating handle,

' (g) athird arm,

(h) a series of pins on the bottom of the third arm, one of which is pivotally engaged with one of the series of sockets intermediate the ends of the first arm,

(i) a marker-support extending transversely through the end of the third arm opposite the first arm, defining on the top thereof a pivotal connection for a' 3 fourth arm and defining on the bottom thereof a marker,

(j) a fourth arm pivotally engaged at one end to the top of the marker support,

(k) a series of pins on the bottom of the fourth arm at the end opposite the third arm, one of said pins being pivotally engaged with one of the series of sockets intermediate the ends of the second arm,

(I) each of the pins and sockets in the respective arms and the sockets in the olfset portion bearing a distinctive geometric indicium, the indicium on each pin and socket on each arm corresponding to an indicium on each other arm and an indicium on a socket on the offset portion,

(in) the pins on the third and fourth arms bearing the same geometric indicia being pivotally engaged in sockets in the first and second arms respectively bearing geometric indicia identical to those of the said pins, the first arm being parallel to the fourth arm, and the second arm being parallel to the third arm at all times, and

(n) the pin on the end of the first arm being pivotally engaged in the socket in the offset portion bearing a geometric indicium identical to the indicium of the pivotally engaged pins and sockets in the arms aforesaid, the said socket on the offset portion being positioned with respect to the depressed area in the table, the length of the first and second arms and the position of the pins and sockets on the arms bearing identical indicia that the said Work area remains generally the same size and generally in the same position adjacent to the side of the table 0pposite the offset portion.

References Cited by the Examiner UNITED STATES PATENTS 7 295,853 3/84 Beam 33-25 850,027. 9/86" Wang 33--25 978,012 12/10 Foster 33-25 1,496,889 6/24 Kay. I

1,502,517 7/24 Murray.

1,508,280 9/24 Kay 3325 2,543,998 3/51 Shulman.

2,823,456 2/58 Valois 3323 V ISAAC LISANN, Primary Examiner.

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