US2477999A - Engraving machine - Google Patents

Description

Aug. 1949- F. s. MILLER 2,477,999

ENGRAVING MACHINE Filed Aug. 8, 1945 Sheets-Sheet l Aug. 2, 1949. R. s. MILLER ENGRAVING MACHINE 4 Sheets-Sheet 2 Filed Aug. 8, 1945 Aug. 2, 1949. R. s. MILLER ENGRAVING MACHINE 4 vSheets-Sheet 5 Filed Aug. 8, 1945 HI mlmm IHIHIIIHIW 1949. R. s. MILLER 2,477,999

ENGRAVING MACHINE Filed Aug. 8, 1945 4 Sheets-Sheet 4 Patented Aug. 2, 1949 ENGRAVING MACHINE Ralph Scott Miller, New Barnet, England, as-

signor to Reginald Henry Windsor, London,

England Application August 8, 1945, Serial No. 609,603 In Great Britain August 28, 1944 -Thisinvention provides an improved form of pattern holder for an engraving machine of the pantograph type, whereby a'serial number can be combined with the other matter in the pattern holder, and changed after each engraving operation, thereby enabling the work pieces to be consecutively numbered.

The pattern holder according to the invention has a window in its bed and comprises one way of example, with reference to the accompanying drawings, in which:

Fig. 1 is a perspective view of the first form, showing the pattern holder in position on the machine,

Fig. 2 is an enlarged plan view, partly in section, of the right hand end of the pattern holder,

Fig. 3 is a section, partly in elevation, on the line III-III in Fig. 2,

Fig. 4 is a section on the line IV-IV in Fig. 2,

Fig. 5 is a view similar to Fig. 4, showing a modified form of indexing device,

Fig. 6 is a plan view of an alternative arrangementv of copy drums, and

Fig. 7 is a section on the line VIIVII in Fig. 6.

Like reference numeralsindicate like parts throughout the figures.

Considering first of all Figs. 1-4, It] represents the bed of the pattern holder, which is formed with a number of longitudinal V slides 40 for the reception of the patterns to be copied by the stylus 4| of the pantograph.

In the bed It is machined a window II, beneath which are disposed, in a casing I2, six copy drums I3. These drums are rotatable on a common fixed shaft I4 and are of decagon form, bearing on their faces patterns corresponding to the numerals -9. The shaft I4 is formed with ten longitudinal grooves I (see Fig. 4), and each drum I3 carries a plunger I6,

loaded by a spring [1, for engaging the grooves I5 and maintaining the drum with its selected digit pattern fairly presented at the window II, so as to enable the digits to be accurately copied together with the other matter to be engraved.

Each drum l3 carries ten pins I8 projecting 5 Claims. (CI. 33-23) from its right hand side face, these being received in circumferential grooves I9 in the adjoining drum, so that each drum is free to rotate on the shaft I4 independently of the others.

Associated with each drum is a press-button 23. The press-buttons are normally held projected in the positions illustrated by compression springs 2i, but can be pressed inwards to rotate their associated drums through one step, i. e. to bring the next digit into position beneath the window. Pivoted at 22 to the inner end of each push-button 20' is a pawl 23, having a straight part, which normally rests (see Fig. 4) beneath the two lowermost pins I8 on theassociated drum l3, and a tooth 25. A tension spring 26 holds the pawl in yielding engagemerit with the pins [8. The stroke of the pawl 23 is such that the drum I3 will be fed round through one step at each operation of the push button 20, the plunger I6 engaging in the next groove I5 in the shaft I4 to locate the drum in the new position.

An alternative form of indexing mechanism, to replace the grooves I5 and plungers I6, is shown in Fig. 5. This consists of a series of locking levers 56, one associated with each drum and all pivoted on a common rod 21. A spring 28 normally holds each lever 56 with its notch 29 engaging with one of the pins I8 on the asso-- ciated drum.

In the arrangement shown in Figs. 6 and 7, a tens transfer mechanism is provided and stepby-step movement of the units drum, which is effected by movement of a lever 30, is sufiicient to set up the consecutive serial numbers in the window. Two links 3|, 32, the latter of which carries a handle 33, are pivoted to'the casing if! at points 34, 35 respectively. As later explained, clockwise pivotal movement of the link 32 from the position illustrated in Fig. 7 is effective to render the tens transfer mechanism inoperative.

The handle 30 is fixed to a shaft 38 on which is loosely mounted a wheel 43 coupled to the handle by a dog clutch 31. When the handle 33 is rotated clockwise as seen in Fig. 7, the wheel 43 is rotated with the handle. A stop, not shown, limits the rotary movement of the handle 30 to 36", corresponding with one tenth of a revolution of the wheel 43.

The wheel 43 has ten notches 44, which cooperate with the pins I8 on the units drum I3, and move it one step at each operation of the handle 30. Fixed to the wheel 43 is an arm 46 carrying a pin 45. This enters a notch 41 in a wheel 48 rotatably mounted on a shaft 49 each time the 3 units drum steps on to present the digit beneath the window, and turns the wheel 48 through one tenth of a revolution. Fixed to the wheel 48 is a wheel 50, the notches 5| of which engage the pins l8 of the tens drum, and turn this through one tenth of a revolution to effect the tens transfer. An arm 52 and pin 53 fixed to the wheel 58 operate, through the agency of wheels 56, 55 which are rotatable as a unit on the shaft 38 to transfer tens from the tens drmn to the hundreds drum, and similar mechanism is provided between the drums representing higher denominations.

On return movement of the, handle a spring 36 yields to allow the dog clutch 31 to slip, the pins l8 .operating to hold the wheel 43 against reverse rotation. i

By swinging the link 32 clockwiseas seen in Fig. 7, the wheels on shafts 49, 38 are brought out of register with the pins I8 on the drums and the tens transfer mechanism is erative.

If desired, instead of providing for manual.

operation of the lever 30, the; latter can be arranged to be operated automatically, through a suitable trip gear, as each work piece is mounted in position on the work table (not shown).

If the drums, 13 are of large diameter and the area covered by the digits on them is small, the drums can be round instead of polygonal, as illustrated.

What I claim as my invention and desire to secure by Letters Patent is:

1. In an engraving machine of the pantograph type, the combination with a flat bed for supporting a pattern to be copied and having thereon 3 means for locating the pattern in relation to the bed andhavingtherein a window in which copy representing a serial number can be displayed adjacent the pattern, of a numbering device cated beneath the window and operable to set up in the window copy representing consecutive serial numbers, said numbering device comprising a plurality of denominational copy drums, resilient indexing means for locating the drums in adjusted position, and a member for imparting one step of movement to the units drum to display the next higher units digit in the window.

2. In an engraving machine of the pantograph type, the combination with a flat bed for supporting a pattern to be copied and having thereon slides for locating the patternv in relation to the bed and having. therein a window in which copy representing a serialnumber can be displayed adjacent the pattern, of a numbering device located beneath the window and operable to setup in the window copy-representing consecutive serial numbers, saidnumberingdevice comprising a plurality ofdenominational copy drums, resilient indexing means for locating the drumsin adjusted position and a member for imparting one step of rendered inop- H 4 movement to the units drum to display the next higher units digit in the window.

3. In an engraving machine of the pantograph type, the combination with a fiat bed for supporting a pattern to be copied and having thereon means for locating the pattern in relation to the bed and having therein a window in which copy representing a serial number can be displayed adjacent the pattern, of a numbering device located beneath the window and operable to set up in the window copy representing consecutive serial numbers, said numbering device comprising a plurality of denominational copy drums, resilient indexing means for locating the drums in adjusted position, and aseries of push buttons, .one associated with each drum, each push button, when operated, causing one step of movement of its drum to display in the window the next higher digit on that drum.

ii-Apparatus as claimed in claim 3, in which each button carries a pawl for coacting with the pins on theassociated drum to rotate the same,

the stroke of each pawl, when its push button is operated, being such to rotate the associated drum through one step.

5. In an engraving machine of the pantograph type, the combination with a fiat bed for supporting apattern to be copied and having thereon means for locating the pattern in relation to the bed and having thereina window in which copy representing a serial number can be displayed adjacent the pattern, of a numbering device located beneath the window and operable to set up in the window copy representing consecutive serial numbers, said numbering device comprising a plurality of denominational copy drums, resilient indexing means for locating the drums in wheel, pins on the units drum, said pins being operated by said notched wheel, on movement of said lever, to efiect a single step of movement of said units drum, and a tens transfer mechanism for efiecting carries over from each drum to the drum of next higher denomination.

RALPH SCOTT MILLER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED. STATES PATENTS Number Name Date 232,983 Lautenschlage'r Oct, 5, 1880 446,788 Peachey Feb. 17, 1891 593,773 Miehle 1 Nov. 1-6, 1897 881,926 Hose Mar. 17, 1908 1,162,597 Fuller 1' Nov. 30, 1915 1,395,489 Glover Nov. 1 1921 1,423,289- Worne'r r July 18, 1922-

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