US1421074A - Machine for indenting characters on metal plates or other like - Google Patents

Description

C.. F. GAUNT.

MACHINE FOR INDENTING CHARACTERS 0N METAL PLATES OR OTHER LIKE ARTICLES.

. 2 APPLICATION FILED DEC. 6. 1919. 1,421,074.

Patentefi June 27, 1922.

4 SHEETSSHEET I.

Invenkor l'ne 19 Charlas 1 F. Gaunt er N'h) Fig. 4-

. C. F. GAUNT.. MACHINE FOR INDENTING CHARACTERS 0N METAL. PLATES. OR OTHER LIKE ARTICLES.

APPLICATION FILED DEC. 6.. 191-9,

Patented June 27, 1922.

4 SHEETSSHEE-T 2.

Charles F'. Gaunt lnvenl'or C. F. GAUNT.

MACHINE FOR INDENTING CHARACTERS 0N METAL PLATE$ 0R OTHER LIKE ARTICLES.

APPLICATION FILED DEC. 6, I919.

Patented June 27, 1922.

F. GaunI' Cha rlfis InvenIor per-RI'I'orney C. F. GAUNT.

MACHINE-FOR INDENTING CEMRACTERS 0N METAL PLATES OR OTHER LIKE ARTICLES.

APPLICATION FILED DE'C.6, 191.9. 1 ,42 1 ,0'74. Patented June 27, 1922.

' '4 SHEETS SHEET 4.

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CHARLES E. ,GAUNT, OF BIRMINGHAM, ENG-LAND.

MACHINE FOB, INDENTING CHARACTERS ON METAL ARTICLES.

To (all 'LUlZOHbiZ may concern: I

Be it known that l, Cnsnmss FREDERICK Gianni, of lli arstone Parade Works, in the city of Birmingham, England, a subject of the King of Great Britain, have invented certain new and useful Improvements in Machines for Indenting Characters on Metal Plates or Other like Articles; and I do hereby declare that the following is a'full, clear, and exact description thereof.

This invention has reference to machines or apparatus for indenting letters and numbers on medals, labels, metal plates and the like.

At the present time in stamping the recipients name and number round: the periphery of a war medal, it is customary for the medal to be rolled between two slides one of which is plain and the other is fixed and formed of type set up to indent the mans name and number 011 the medal. This method however is slow as the type has to be set up and fixed letter by letter for each individual slide and medal.

It has also been proposed to employ a machine in the nature of a typewriter for indenting letters, numbers or the like on medals, metal labels and the like, said machine havin punches adapted to be struck by a hammer or pressure piece and bearing the characters to be indented and carried by type levers connected to linger lovers with keys adapted to be depressed to bring the punches one at-a time on to the work, said machine having means operated by the finger keys and space bar for holding and this class and comprises means for electrically operating the hammer or pressure piece so arranged as to bring the same into operation immediately after the lever holding the letter or number falls down into position said hammer or pressure piece being suitably guided and the electrical mechanism being so arranged that the act of the operator pressing on one of the keys will bring the corresponding letter or number into position and also cause the hammer or PLATES OR OTHER LIKE Specification of Letters Patent. Patented June 27 1922 Application filed December 6, 1919.

Serial No. 343,058.

pressure piece to fall and immediately the operators finger is taken off the key boardthe hammer or pressure piece will rise and allow the lever wlth the letter or number to rise also. My invention also comprises im-- proved means for gripping, holding and supporting a medal or the like in position for the punches to strike ,on to the periphery for the punch to'strike on the face of the" same combined with means for turning the holding device at the proper times to form the necessary spaces between the characters as they are. punched in a circular line on the face to be electrically operated as aforesaid, my invention further comprises improved means for gripping and-holding and supporting the medal or metal label or the like in position for the punches and to strike in straight lines on the face of the same.

In machines of this class it has previously been proposed for the type letter or num ber on the end of the type lever to be properly guided on to the work by movinginto a tapered recess in a guide plate before being struck by the hammer or pressure p1ece,'also it has been proposed to provide a pair of clampingplates to hold between them the plate or part on which the letters or numbers are to be indented, these clamping plates beingr adapted to be turned centrally and combined with means for turning them at the proper times to form the necessary spaces between the characters as they are punched:

in a circular line on the face-of the plate, also it. has been proposed for the carriage forthe blank to be combined with automatic step by step movement to space the character impressions properly on the plate and also a line adjusting movement to provide for moving the plate to accommodate two or more lines of impressions.

It is preferred for the levers carrying the letters or numbers to have a downwad action on to the work.

For full comprehension however of my invention reference must be had to the ac companying drawings in which similar reference characters indicate the same parts, and wherein:

Figure 1 is a back elevation partly in section of portions of a known typewriting machine combined with additional mechanism and means embodying my invention and adapted for indenting letters numbers and the like around the periphery of a war medal or the like;

Figure 2 is a back elevation partly in section of a modified arrangement of the striking hammer and its operating means;

Figure 3 is a back sectional elevation of a portion of the medal holder represented in Fig. 1 but shewn open for the reception or removal of a medal;

Figure 1 is a sectional side elevation of the machine shewn in Fig. 1 but with the hammer raised out of action, whereas in Fig. 1 the hammer is shewn in action;

Figure 5 is a side elevation of the ratchet mechanism of the same for turning the medal and its holder;

Figure 6 is a back elevation partly in section and Figure 7 is a side elevation of a slightly modified arrangement of the medal holder;

Figure 8 is a back sectional elevation of a part of the said machine but adapted for indenting letters, numerals and the like in a circular line or lines on the face or faces of a war medal or the like; and

Figure 9 is a plan of the means shown in Fig. 8 for holding and revolving the medal or the like during the operation;

Figure 10 is a plan of means for use on the saidmachine when employed for indenting letters, numerals and the like on to the faces of metal labels and the like in straight lines;

Figure 11 is a back sectional elevation of the same Figure 12 is a cross sectional elevation of the same taken on line X X of Fig. 10; and

Figure 13 is a cross sectional elevation of the same taken on line Y Y of Fig. 10.

In the particular known kind of typewriter illustrated by my drawings the levers 2. which usually carry the type now carry the letter or figure punches or the like and are adapted to strike down on to the top of punches are mounted on fulcrum pins 3 and their short arms are connected by the connecting wires 4 to the finger key levers 5 to the upper fore ends of which the finger keys 6 are fixed, the finger kev levers working at their back ends on the fulcrum bar 7. 8 is the usual space bar the side levers of which with the finger key levers 5 act on the universal bar 90 underneath for actuating the ratchet feed. All these parts are well known. It is to be understood that although only a few of the type levers 2 are shewn on my drawings the machine posseses the full coniplements each carrying at its outer end its own particular letter, number or character cut on the fore end of a punch 9 which is mounted and fixed in the upper end of the type lever 2 and is adapted to strike down on to the periphery of the medal 1 as the corresponding finger key is depressed.

The means which I employ for support ing and holding the medal 1 or the like whilst the letter or number is being struck on to its periphery and for turning the medal or the like round through one or more spaces after each operation can be arranged in various ways: For instance when it is required for the medal or the like to be marked on its periphery then a circular clamping device is preferably arranged as illustrated in Figs. 1, 3, and 6 consisting of two circular jaws marked respectively 10 and 11 preferably made of just about the proper diameter so as to fit against the face of the. medal within the circular projecting rims 12 on the two faces of the medal (see Figs. 1 and 6) the medal or the like being additionally supported by the portion of its periphery opposite the part where the blow is struck resting on the roller 13 Figs. 1, 3 and 4 or resting against the are shaped top of the block 14 (Figs. 6 and 7) arranged immediately below or otherwise just outside the two circular clamping jaws 10 11. Means are provided for opening and closing these two clamping jaws 10 1.1 sufficiently to allow of the medal 1 being placed between them to rest on the roller 13 or in the are shaped recess of the block 14 so that when the circular aws 10 11 close on to the medal or the like 1 the said medal or the like is gripped and held by the jaws in the proper position for the punch or the like 9 carried by the lever 2 to indent the letter or the like upon the periphery. The clamping jaws 10, 11 are preferably arranged as shewn on my drawings, where it will be seen that the jaw 10 forms the front end of a cylindrical member part 15 which is made of slightly smaller diameter than the circular jaw 10 and is mounted with its axis horizontal to turn in a bearing 16 of the small head stock 17, the base 18 of which is fixed on to the frame 19 of the machine. The cylindrical member 15 is prevented from moving endwise in its bearing by the shoulder 20 formed on the member 15 and the collar 21 fixed theremantra turning in the sleeve 23 any "convenient means as by a teather or set pin or the like. 28 is a coiled wire spring in compression contained within the hollow sleeve 22 and-adapted to force the member 22 with its circular jaw 11 against the face of the medal and to grip the same firmly against the other jaw 10.

- which is furnished with an end knob 30 and fixed to the centreot the jaw 11 for the purpose of pulling it back for the removal of the medal when required. The roller 13 on the periphery of which the medal bears as aforesaid can conveniently be mounted on an axle pin 31 carried by a suitable bracket 32 fixed on to the base part 18 of the head stock or ifth'e block 1 1 (see Figs. 6 and '7) is employed then this block 14 can conveniently be fixed as by screws 34 to the face of the head stock 17 and be arranged to be set up towards the medal as by set screws 35 in the lug 36.

The means for locating the letter orinumber punch in its exact position on the periphery of the medal preparatory to its being struck by the hammer can "conveniently consist of a steel collar 37 made with a central hole just the proper size toreceive the punch and the top of the hole being countersunk to form a guide tor the punch and this collar can'convenien'tly be carried by fitting in a recessed hole ina plate 8 8 whichis adjustably fixed on the fiat top of the head stock 17 and pedestal 25. The means for adj u'sta'bly securing this plate in posi tion consists of screws 250 mounted in upwardly projecting shoulders 251 on the headstock and pedestal and bearing against the opposite ends 01 the plate.

The hammer for striking the punch 'to indent theperiphery o f the medal whilst being held as aforesaid is preferably (although not necessarily) combined with the machine so as to be operated by striking the finger keys but this is not absolutely necessary as the punches may for instance be e'a'ch struck by a light hand hammer after having'b'een brought into position in consecutive orderby the finger keys.

On my drawings I have illustrated two difi'erent ways of mounting and operating the striking hammer when combined with the machine. In the arrangement shown in Figs. 1 and 1 the hammer is arranged to be operated by the operators foot pres- 29 is a central stem sure' and'in this case the hammer head 40 has a'le ver =or shank 41 which is'mounted on a fulcrum pin 12 carried by a bracket 18 fixed to the machin'eframe 1-9 and on the lever or shank 41 there is a connection 14- "connected by a downwardly extending wire or co'rdor the like 45 to a stirrup or trea'dle convenient for the operators foot to; move the hammer down when striking the blow the hammer bein raised to its norn'ral position by the coi led spring 46 connecting the "tail end 47 of the hammer sha'nkfto the eye'4e8 on the machine frame 19. The raised position of the hammer is indicated in Fig. 1 by dot-ted lines and by full lines in Fig. 41-. 19 is affixed stop on the face of the bracket 13 with" which the stop part 150 of the hammer-comes into contact when-"the hammer is; raised.

p Any suitable arrangement of ratchet mechanism can be employed to be operated by the. finger levers 5 or by the space bar 8 and adapted to turn the medal holding jaws and'med'al through the space of one letter after each letter or figure has been struck. A convenient arrangement of mechanism is illustrated on my drawings and is as follows: Fixed on the end of the member 15 there is a ratchet Wheel 51 having the same number of teeth as there are to be letters or figures and spaces between the words and groups of figures round the periphery of the medal, and a ratchet wheel 52 of the same diameter and pitch is fixed on the end of the sleeve 23. In order to operate these two ratchet wheels there is for each of them ratchet lever marked respectively 53, 54, and adapted to turn about the axis of the ratchet wheel and each carrying at its outerend a pawl 55 to engage with the ratchet teeth- These ratchet levers 58, .54

are respectively connected as by downwardly projecting links 56 to the upwardly projecting arms of the cross bar 58 the downwardly projecting sides 59 of which are fixed to the side levers 60 of the universal bar so that after any of the key leverse or thespace bar 8 has been depressed through a short space the universal bar 90 is thereby moved down taking with it the pawls '55 through a little more than the space of one tooth and then on the upstroke after the hammer 41 and the punch levers '2 have risen clear of the medal 1 the pawls 55 engage with one tooth of each of their corresponding ratchet wheels '51, 52

and turn the same'and'the jaws and medal through a space of one letter or number. Suitable means such for instance as the spring catch 61 carried by the spring 62 from theQfra-ine 19 of the machine is employed to engage with the teeth of the ratchet wheels 51, "52 and to hold the ratchet wheels with the jaws and medal in the exact position and prevent them from turning too far; or other suitable known mechanism may be employed for that purose.

p After any particular letter or number punch 9 has been brought down into position as in Fig. 4 by depressing the corresponding finger key 6, then whilst the punch is thus in position the hammer 10 is as aforesaid caused to strike its blow on to the punch and indent the same into the periphery of the medal which is meanwhile securely held by the jaws l0 and 11 and by resting on the roller 13 or block 1 1 underneath. The depression of the finger key to bring down a punch lever as aforesaid moves the ratchet levers 53, 54, as aforesaid and on the rising of the finger keys the ratchets turn the ratchet wheels 51, 52 through the space of one tooth to form the proper space for the next letter or number or character and when the medal is finished it is readily removed by opening the jaws by pulling the bar 29 as aforesaid, and the next medal or the like can be introduced, and held between the jaws.

Instead of operating the hammer by foot pressure as aforesaid other means may be employed and in fact the preferred arrangement is to operate the hammer by the action of an electro magnet controlled by the universal bar 90 which is operated by the finger keys. Said electro magnet may for instance be arranged to work with a plunger as illustrated by Fig. 2 where it will be seen that the electro magnet 63 is mounted on and insulated from a bracket 64 fixed to the machine frame 19 and is furnished with a plunger 65 which at 66 is jointed by an insulated joint to the attachment 67 fixed on the hammer shaft 41. The electro magnet 60 is wired to a battery or other source of electricity supply and also to a contact piece 68 (see Fig. 4) on the universal bar 90 which, when the universal bar has been depressed by a finger lever sufficiently to bring down one of the levers 2 and its punch 9 into posit-ion, comes in contact with a fixed contact piece 69 which can conveniently be carried by a cross bar 70 fixed on the machine frame this contact piece 69 being in the circuit from the electric magnet so that the circuit will now be completed and the hammer will immediately be caused to fall on to the punch 9. When the operators finger is taken off the finger key and the finger lever rises the circuit through the electro magnet is broken and the hammer flies up by the spring 46 and before the punch 2 rises the hammer is sufficiently high to be clear of the same. As the universal bar 90 is operated by depressing the space bar 8 as well as by the finger levers it follows that the hammer would be brought down occasionally when a punch lever 2 has not been brought down, and in this case a suitable cushion or buffer should be provided. for instance as indicated by dotted lines at 71 F ig, l and carried by the frame of the machine which buffer will prevent the hammer striking on to the collar 37. Or if desired the contact piece (58 may be fixed on to an additional universal bar which extends only underneath the finger key levers 5 and does not extend underneath the space bar lever so that in this case the hammer will only be brought down after one of the punch levers has been brought down.

When the machine is furnished with the electrically operated hammer as aforesaid and is required to indent letters numbers or other characters on to the face of a medal or the like in a circle then the medal or the like has to be so held and supported that the punch or the like will strike on to the face of the same and I provide means for turning the medal or the like axially after every letter number or the like has been struck or after the sgeces between the groups have been formed. Figs. 8 and 9 illustrate suitable means for supporting and intermittenly turning the medal or the like as aforesaid but these means and mechanism are only given as an example and not as limiting my invention to this particular arrangement as obviously this part of my invention can be modified in various ways and has to be modified when the punch levers 2 are arranged to act in a different manner to that in the machine illustrated. In this arrangement of my invention the medal or the like 1 lies face upwards on a circular block 7 2 carried on the turn table 7 3 which has a downwardly projecting central shank 74 mounted to turn in a fixed pedestal 75 fixed to the face of the machine frame 19. Mounted on the turn table 73 there are two clamping plates 76, 77, which are adapted to be adjusted between guide bars 78 on the top of the turn table and the opposed edges of these plates 76, 77 are V shaped or otherwise formed so as to grip the perphery of the medal 1 between. them and they are adapted to be set up by set screws 79 and are fixed on to the top of the table by screws 80. Fixed to the underside of the turn table thereis a ratchet wheel 81 the pitch of which corresponds with the required spaces from letter to letter on the medal and this ratchet wheel is shewn as being operated by the bar 58 fixed on the side arms -of the universal bar said bar 58 being furnished with an upstanding bracket 82 which is jointed to .a bell crank lever 83 fulcrumed at 84 to a fixed lug 85 of the machine frame. The upstanding arm 96 with the bell crank lever is at 87 jointed to the connecting link 88 which at one end is jointed to the outer end of the ratchet lever 89 which carries the pawl 91 for engaging with the teeth of the ratchet wheel 81; the other end of this lever 89 is mounted on a fulcrum pin 92 carried by a boss 93 from the pedestal 75. The guide collar 37 and its carrying plate 38 are adjustably fixed to the upstanding side arms 94 of the pedestal. It is to be understood that this pedestal and the turn table take the place of the pedestal 17 and accessories shewn in Fig. 1 for holding the medal to be marked on its periphery. It will be seen that the ratchet mechanism described will cause the turn table and medal to be turned through one space at the proper times after each letter or number or the like has been struck. Any suitable detent or the like, not shewn on my drawings, has to be provided to hold the turn table and ratchet wheel stationary after each movement and prevent it from turning too far.

When the machine is furi'iished with an electrically operated hammer as aforesaid is required to be used for indentingletters or the like in straight lines on labels or the like or on the faces of medals or the like, then the table or the like on which the label, medal or the like is arranged on a carriagead-apted to be operated laterally, that is from side to side of the machine, by any well known mechanism as used in a typewriter as such carriage takes the place of the carriage which in a typewriter carries the platen. For my purpose the said table carrying the medal, label or the like is adapted to be moved and fixed at right angles to the line of movement of the carriage so as to make the spaces between the line. .In Figs. 10, 11, 12 and 13 I have illustrated a suitable arrangement of carriage and table for use on the said machine when it is to be employed for marking numbers or the like in straight lines on labels or the like and a similar arrangement can be employed for marking letters numbers or the like 111 straight lines on the face of a medal but in this case the holding means which in Figs. 10, 11, 12 and 13 are shewn suitable for holding a metal name plate have tobe modified so as to grip and hold a circular medal or the like.

94 is the flat table mounted on the flat top of the carriage 95 which latter is adapted for lateral movement in the machine as is the carriageof a typewriter and is adapted to be operated by similar mechanism from the universal bar but this mechanism being well known is not shewn on my drawings. The flat plate like table 94 is adapted to slide along the top of the cariage 5 in guides 96, to make the spaces between the lines of letters, numbers or the like. The name plate 98 lies on the table 94 and is held in place by fitting in recesses 99, 100 in the two gripping plates 101, 1025 which are adjustably clamped on to the top of the table 94 by the set screws 103. Fixed crosswise to the underside of he t b e 9 there is a toothed rack 104 which projects through a slot 105 in the table and engages with a toothed pinion 106 on the operating shaft 107 which is mounted in bearings 108, 109' in the carriage and at its outer end is furnished with means such as the miller knob 110 for turning it to move the car} riage to and fro. The screws 111 screwed into the table from the underside through cross slots 112 in the top of the carriage prevent the table from rising off the car riagc. The table is moved forward that is in the direction indicated by the arrows in Fig. 10 by turning the operating shaft 107 and teeth of the rack 104 two coiled wire springs 115 are provided topull the'table 94 backwardly as the ends of these springs are respectively connected downwardly projecting pegs 116 fixed to the table and corresponding downwardly projecting pegs 117 fixed to the carriage 109. The spacing between the lines is attained by the ratchet wheel 113' fixed on the operating shaft 107 gearingwith the pawl 114 carried by the end of the carriage 109 v(see Fig. 13) so that after every line of figure letters or the like has been indented on the name plate 98 carried by the table 94 which is mounted on the carriage, the operator by the milled knob 1'10 turns the shaft 107 and the ratchet wheel 113 and moves the table forward through the space of one tooth so as to commence the next line of the label or the like 98. When the label isfinished the table is moved back by the springs 115 after the pawl 114 has been lifted.

.Vhat I claim is as'follows:

1. In a machine for indenting metal blanks the combination with blank gripping mechanism; of a fixed guidelocated in close prox imity to the blank and consisting of a carrier of'plate form having a central opening and a collar fitted. with said opening, a plurality of punches each of which'i's movable to and from position within the collar and a ham-' merfor striking each punch when in said position for the purpose set forth. p

2. In amachine for indenting metal blanks the combination with blank gripping mech-' anism; of a fixed guide located in close proximity to the blank and consisting of a carrier of nlate form having a central opening and a cellar fitted with said opening, a plurality of punches each of which is movable to and from position within the collar, and a hammer for striking eachpunchwhen in said position and electrical means for operating said hammer. p

3. In a machine for indenting metal blanks the combination with the frame thereof and blank gripping mechanism; of a fixed guide located in close proximity to the blank, a plurality of manually operated levers each being fulcrumed at one end in the said frame and carrying. a punch at its: opposite end.

adapted to be swung to position within the guide, and means for exerting pressure upon each punch when in said position for the purpose set forth.

' 4. In a machine for indenting metal blanks the combination with the frame thereof and blank gripping mechanism; of a fixed guide located in close proximity to the blank; a plurality of manually operated levers each being fulcrumed' at one end in the said frame and carrying a punch at its opposite end adapted to be swung to position within the guide, and a hammer adapted to strike each punch when in said position and means for actuating the hammer.

5-. In a machine for indenting metal blanks the Combination with blank gripping mecha nism; of a fixed guide located in close proximity to the blank, means for adjusting said guide relatively to the blank, a plurality of punches each of which is movable to and from position within the guide, and means for exerting pressure upon each punch when in said position for the purpose set forth.

6. In a machine for indenting metal blanks the combination with fixed supporting members, and blank gripping mechanism carried by said supporting members; of a fixed guide mounted upon said supporting members in close proximity to the blank and consisting of a carrier of plate form having a central opening therein and a collar fitted within said opening, means for adjusting the carrier relatively to the blank, said means consisting ofadjusting screws carried by the supporting members and engaging opposite sides of the carrier, a plurality of punches each of which is movable to and from position within the collar and a hammer for striking each punch when in said position for the purpose set forth.

7. In a machine for indenting metal blanks the combination with blank gripping mechanism; of a fixed guide located in close proximity to the blank, combined means for gripping the guide and for adjusting the same relatively to the blank, a plurality of punches each of which is movable to and from position within the guide, and means for exert ing pressure upon each punch when in said position for the purpose set forth.

8. Ina machine for indenting metal blanks the "combination with a pair of supporting members, blank gripping mecha nism consisting of a pair of jaws having circular gripping faces and rotatably mounted one in each of said supporting members, a fixed guide mounted upon each of said supporting members in close proximity to the blank when in position between the jaws, a plurality of punches each of which is movable to and from posi tion vithin'the guide and means for exerting pressure upon each punch when in said position for the purpose set forth.

9. In a machine for indenting metal blanks the combination with a pair of supporting members, blank gripping mechanism consisting of a pair of jaws having circular gripping faces and rotatably mounted one in each of said supporting members, a fixed guide mounted upon each of said supporting members in close proximity to the blank when in position between the aws, a plurality of punches each of which is movable to and from position within the guide and means for exerting pressure upon each punch when in said position, and means whereby said jaws are rotated a predetermined extent when one of said punches is moved to position within the guide.

10. In a machine for indenting metal blanks the combination with a pair of supporting members, blank gripping mechanism consisting of a pair of jaws having circular gripping faces and rotatably mounted one in each of said supporting members, resilient means for yieldingly maintaining the movable jaw in blank engaging position and manually operated means for withdrawing said jaw from such position, a fixed guide mounted upon said supporting members in close proximity to the blank when in position between the jaws, a plurality of punches each of which is movable to and from position within the guide and means for exerting pressure up-- on each punch when in said position, and means whereby said jaws are rotated a predetermined extent when one of said punches is moved to position within the guide.

11. In a machine for indenting metal blanks the combination with a pair of sup-- porting members, one of said supporting members having an annular bearing member with a closed end; a blank gripping mechanism consisting of a pair of circular gripping faces said movable jaw having a portion of sleeve form formed integrally therewith and rotatably fitting within said annular bearing member, a spring located within said sleeve portion and bearing between said movable jaw and the closed end of said bearing member and adapted to yieldingly maintain the latter in blank gripping position.

12. Ina machine for indenting metal blanks the combination with a pair of supporting members, one of said supporting members having an annular bearing member with a closed end; of blank gripping mechanism consisting of a pair of circular gripping faces said movable jaw having a portion of sleeve form formed integrally therewith'and rotatably fitting within said annular bearing member, a spring located within said sleeve portion and bearing between said movable jaw and the closed end of said bearing member and adapted toyieldingly maintain the latter in blank gripping position, and means for withdrawing the movable jaw from blank gripping position, said means consisting of a rod having its inner end connected to said jaw and extending axially therefrom through the sleeve portion and the closed end of said. annularbearing memberand having .a finger hold at its outer end.

13. In a machine for indenting metal blanks the combination with blank gripping mechanism consisting of a pair of rotary jaws one stationary and'the other movable relatively thereto each having a circular gripping face, a plurality of punches, a plurality of levers for respectively actuating said punches and means for intermit tently rotating said jawsin unison when one of said punches is actuated, said means consisting of a sprocket wheel operatively connected to each of. said aws and adapted to rotate in unison therewith, a space bar adapted to be moved when one of said levers is actuated and means effecting an operative connection between the bar and said sprocket wheels and adapted to convert the movement of said bar into rotary movement of the sprocket wheels.

14. In a machine for indenting the peripheries of metal discs and the like, the combination with blank gripping mechanism, a plurality of punches each of which is adapted to be moved to position engag ing the periphery of the blank, means for exerting pressure upon each punch when in position and means in bearin relation with the periphery of the blank at a point diametrically opposite the portion being in dented, said means consisting of a roller.

15. In a machine for indenting the peripheries of metal discs and the like, the combination with blank gripping mechanism, a plurality of punches each of which is adapted to be moved to position engaging the periphery of the blank, means for exerting pressure upon each punch when in position, means in bearing relation with the periphery of the blank at a point diametrically opposite the portion being indented, said means consisting of a roller, means in bearing relation with the periphery of the blank at a point diametrically opposite the portion being indented and adapted to dissipate the shock of the impact of the punch thereon.

16. In a machine for indenting metal blanks a plurality of punches each of which is movable to position, a plurality of keylevers adapted to actuate saidpunches, a universal bar adapted to be moved by each of said key-levers when the latter is operated, a hammer adapted to strike each punch when in said position with the blank and electrically operated means for actuating said hammer when a key-lever is operated, said means consisting of a magnetic coil, an armature movably located within said coil and operatively connected to said hammer, a contact located in fixed position adjacent said universal bar, a second contact mounted'upon said bar and adapted toengage the first contact when the bar is actuated and an electric, circuit including said; contacts and, magnetic coil.

17. In a machine for indenting metal blanks, blank gripping mechanism, a fixed guide located in close proximity to the blank, means for adjusting the position of said guide relatively to the blank, a plurality of punches each of which is movable to position within the guide and in engage ment with the blank, a plurality of keylevers adapted to actuate said, punches,

universal bail. adapted to bemovedby each oi said key-levers when the latter is operated, a hammer adapted to strike each punch when in said, position with theblank and electrically operated means for actuating said hammer when a key-lever is operated said means consisting of a magnetic coil, an armature movably located within said coil and operatively connected to said hammer, a contact located in fixed position adjacent said universal bar, a second contact mounted upon said bar and adapted to engage the first contact when the bar is actuated, and an electric circuit including said contacts and ma netic coil.

18. In a mae liine for indenting metal blanks the combination of the frame thereof including a bracket and blank gripping mechanism, a fixed guide located in close proximity to the blank, a plurality of punches each of which is movable to and from position within the guide and means for exerting pressure upon each punch when in said position said means consisting of a hammer having an elongated shank and fulcrumed in said bracket at a point in close proximity to its end opposite to that carrying the hammer head, resilient means for yieldingly maintaining the hammer in position out of punch-engaging position, means limiting the extent of movement of the hammer away from punch engaging position and means for causing the hammer to engage each punch when in position within the guide.

19. In a machine for indenting metal blanks the combination of the frame thereof including a bracket and blank gripping mechanism, a fixed guide located in close proximity to the blank, a plurality of punches each of which is movable to and from position within the guide and means for exerting pressure upon each punch when in said position said means consisting of a hammer having an elongated shank and fulcrumed in said bracket at a point in close proximity to its end opposite to that carrying the hammer head, resilient means for yieldingly maintaining the hammer in position out of punch-engaging position, means limiting the extent of movement of the hammer away from punch-engaging position, and electrically operated means for causing the hammer to engage each punch when in position within the guide.

20. In a machine for indenting metal blanks the combination of the frame thereof including a bracket and blank gripping mechanism, a fixed guide located in close proximity to the blank, a plurality of punches each of which is movable to and from position within the guide and means for exerting pressure upon each punch when in said position, said means consisting of a hammer having an elongated shank and fulcrumed in said bracket at a point in close proximity to its end opposite to that carrying the hammer head, resilient means for yieldingly maintaining the hammer in position out of punch-engaging position, means limiting the extent of-movement of the hammer away from punch-engaging position, electrically operated means for causing the hammer to engage each punch when in position within the guide, said electrically operated means consisting of a magnetic coil, an armature movably located within said coil and operatively connected to said hammer, a contact located in fixed position adjacent said universal bar, a second contact upon said bar and adapted to engage the contact when the bar is actuated and an electric circuit including said contacts and magnetic coil.

In testimony whereof I have signed my name to this specification in the presence of two witnesses.

CHARLES F. GAUN '1.

Witnesses:

GoRDoN G. CosKE, WILLIAM J. C. HnWETsoN.

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