US1020827A - Safety-guard for stamping-presses. - Google Patents

Description

I. M. JONES.

SAFETY GUARD FOR STAMPING PRBSSBS.

APPLICATION FILED NOV. 10, 1911.

Patented Mar. 19, 1912.

JAMES MELVIN JONES, OF HAMILTON, ONTARIO, CANADA.

s erry-ovum For. s'rmrmd-rnsssns.

Specification ofLetters Patent.

Patented Mar. 19, 1912.

Application filed November 10, 1911. Serial No. 659,599.

Toall whom it may concern Be itknown that I, JAMES :rcitizen of the Dominion of Canada, residing at 22 King \Villiam street, in the city of Hamilton, in the county of \Ven'tworth, in the Province of Ontario, Dominion of Canada, have invented certain new and useful Improvements in SaftyGuards for Stamping-Presses, of which the following is a specification. i i This invention relates to safety guards for stamping presses, and it has more'particular reference to that type of guard such as is described in the specification :of 'my I former, U. S. Patent- 9'Z7953, dated March 6th,, A. D. 1910. I

' Guards of the type specifically referred to are provided with rigid and direct connections between the foot lever and the'guard operating lever, and between said latter 'lever andjhe latch mechanism whereby posilive action is insured.

The main object of my present invention is to provide a guard of the class designated characterized by the fact that the'continuous rigid and direct eonnectionfrom the foot lever to the latch only exists durin the withdrawal andreturn of the latch groin its normal position, or for the effective movement of the'punch or plunger.

A further object of the present improvements is to provide means whereby the guard must lowered to its preventive POSlilOIkwhen once properly adjusted-before 'the latch. o rating'mec. anism can be released.

A still further object of the invention isto prov1de means 'whereby the operators,

fingers or hands are absolutely prevented from being eau ghtjn the machine during themanipulationof the punch or plunger;

or, in other words, the hands or fingers must bemove'd clear of the dies before'the upper qne'can descend.

These and other objects are attained by the mechanism illustrated on the IIGQOI'IF panyin drawings and the novel features \vhereo arepartlcularly pointed out by the appended claims.

Iuthe'drawmgs, 'Fi gure1,is a side eleva lion of my improved s afetv g ua rdi attachme as ppli b t A i q li j v. a p we 'l sv h' r relbeesflleshr t i MELVIN J omis,

the side of the press frame by means of set screws orb'olts passed through the holes, 2 2. k I

Atthe upper end of the bracket 1, I form a bearing '3, in which is securely fixed by a setscrew 4, one end of a horizontally dis-' posed spindle'5, which serves as thefulcrum -foithe entire meehanisnn Loosely mounted on the aforesaid spindle 5, isfa'bearing" sleeve 6, having formed-integrally therewith a box shaped part 7,

which serves as a housing for the mainor guardoperatlng lever 8, said lever belng laterallyhdjusted by means of aset screw 9,

relative to the axis of the spindle 5. In other words by slackening the set screw 9, the lever 8, may moved longitudinally of its axis in'ordr to position the guard accu rately relative to the front face ofthe dies, all of which parts are not shown, as they form no part 'of' the presentinvention.

5 Forward of the box shaped part 7 and on the lever S, I mount a sleeve or block 10, which is secured in place by a set screw 11. This said sleeve or block 10, is furnishedat its lower part with an obliquely disposed lug 12, to which is pivotally united by a fork 13, the upper end of a more or less vertical connecting-rod 14. The lower end of this rod 14, is coupled to thefoot lever or treadle-not shown-4n a similar manner to that described in the foregoing referred to patent, and I wish it particularly noted that near the front end and on the lever B, is a "box-shaped bracket 20, furnished at one side with a substantially vertical slot 21, in

which is clamped by a set screw 22, adepcndmg arm or bar 23 carrying the guard device proper, which is preferably in'ac cordance with my prior Patent 'No. 1,001,858, dated August 29th, 1911. and need not be here further explained or illustrated.

24, is a further box-shaped sleeve or block clamped by a set screw at or near the opposite, or rear end, of the lever 8. and it is formed at its lower part with an obliquely disposed lug 26, to which is connected a strong tension spring 27, the free end whereof is suitably attached to area-- venient part of the press frame. The result of this arrangement of parts is that said spring may be accurately tensioned while at the same time it tends to normally hold the guard and lever 8, in their elevated position, indicated by the dot-and-dash line a--a, shown on Fig. 1,.and it is so dc signed to counterbalance the weight 'of' the connected parts.

Loosely mounted on the spindle 5', between the bearing 3, and the sleeve 6, for example. is a second sleeve 28, having formed at its lower side a box shaped part 29. in which is clamped by a. set screw 30. an auxiliary or second laterally disposed lever or bar 31. arranged for oscillation up and down in a vertical plane parallel with that traversed by the lever 8, and at a slight distance therefrom;

At or near the rear end of the bar 31. I clamp by a set scrcwflQ, a box sleeve or block 33. provided with :1 depending lug 34. to which is connected a tension spring 35. attached at its lower end to the press frame. the bar 31, l pivotally connect bya pivot pin 36, the forked lower end 37, of. a compound ronnccting rod 38, fastened at its upper end to the releasing latch of the press, said parts being all in accordance with my previous patent above first mentioned.

39, is a further box-sleeve clamped on the bar 31. by a set screw 40,:1'nd it is so arranged as to be in line beneath the plunger 18, when the parts occupy the position shown in the drawings, which is that when the guard is lowered and the operator is ready to release the latch and allow the upper die to descend, or perform its effective movement.

It is to be noted that the spring 35, is tensioned to counter-balance the weight of its connected parts and in consequence the To the extreme front end of.

latch can be kept locked while the guard proper and its operating lever 8, may be raised and lowered when desired independent of the regular press parts every important desideratum when dealing with work necessitating the hands of the o rator adjacent the work acted upon. thermore it is to be observed that the oscillation of the bar 31, will be regulated by the movement of the latch, that is to say, if the latch has a travel of one-half inch the front a similar travel.

In the drawings I have indicated the normal position held by the bar 31, and its p0ssible downward deprcssionby the dot-anddash line b--b.

Tn use and assun'iing the lever 8, is raised or occupying the position indicated by theline rz-a, the operator will depress the footend of .the lever 31, will be adjusted to have lever thereby pulling on the connecting-rod 14. and lowering the guard proper in front of the dies till thespririg controlled plunger 18. strikes on the box-sleeve 39, carried by the auxiliary bar 31." At this point and assuming the device is'accurately adjusted the 1 guard proper will beinf its absolute preventiveposition relative to the dies.

slight further pressureon the foot lever will cause a pulle to be exerted on the con nccting rod 38, when the latch will be released andthe nress plunger be left free to perform its effective movement. In other words a rigid and directconne'ction from the foot lever to the latch is only made possible when the guard proper has been lowered to its said preventive position.

From the foregoing it will be seen that by my present invention T have efi'ected a very great and important improvement in safety guards of the type specified while in no way affecting their simplicity of construction.

- Obviously the invention ,may be readily adapted to any tvpe of stamping press worked or operated bv a foot lever release for the latch mechanism. as every part is made adjustable. and I wish it clearly understood that I do not confine myself to the specific arrangement and combination of parts illustrated and described. various alterations in their shape and other arrangemcnts thcreof'being. possible without in any way departing from the spirit and scopeof the invent-ion add it is intended topresent appliguard carrying member, of a manually operable member, connected to the guard car rying member and a latch releasing member,

said guard carrying member being independently movable with relation to the latch releasin member until the guard is moved substantially .to itsprotective position, ad-

the combination with auard carrying ditional movement ofthe e latch releasmember serving actuate -2. In a -deviceof the character described, ard carrying member. of a latch releasing member, a

manually operable member connected to the guard carrying member, and a member car;

ried by the guard carrying member and adapted to engage thelatch releasing memher only at the termination of the movement of the guard carrying member to protective position, to thereby move the latch carrying member to release the latch.

3. Ina device of the character described, the combination with a pivoted latch releasing member of a ivoted uard carrying lever located therea ove an; movable independently of the latch releasing lever, and a yieldable contact member carried by the guard carrying lever and arranged to con tact with the latch releasing lever at the .ter-

mination of the downward movement'ofi the guard carrying lever to protective position to thereby depress the latch releasing lever to release the latch. a

4. In a device of the character described, the combination with a supporting stud'of a guard carrying lever pivotall mounted thereon, a latch releasing lever li 'ewise pivotally'mounted upon said stud, a manually I operable member engaged with the guard carrying'lever, and a spring plunger carried by the guard carrying lever and adapted to contact with the latch releasing lever at the termination of the downward movement of the guard carryin lever to pro- ;ective position, as and for t 1e purposes set orth.

In a device of the character described, the combination with a supporting stud of a spring actuated guard carrying lever pivotally mounted thereon, a latch releasing lever likewise pivotally mounted upon said stud, a manually operable member engaged with the guard carrying lever, and a spring plunger carried by the guard carrying lever and adapted to contact with the latch releasinglever at the termination of thcdownwar-11 ovement of lhe guard carrying lever to pro ertive position, as and for the purposce'sej' f orth.

6. In a device of the. character described, the combination with a supporting stud of a spring actuated guard carrying lever pivotally' mounted thereon. a latch releasing lever likewise pivotally mounted upon said stud. a manually operable member engaged with the guardcarrying member, and a' spring plunger carried by the guard carrving lever and adaptedio contact with the latch releasing lever 'at the termination of the downward movement of the guard carrye ing lever to protective position, as and for the purposes set forth.

7 In a device of the character described, the combination with a supporting stud of a spring actuated guard carrying lever and a spring actuated latch releasing lever pivctally mounted thereon, a latch releasin lever likewise pivotally mounted upon sait l stud,-a manually operable member engaged with the guard carrying lever, and a spring plunger carried by the guard carrying lever and adapted to contact with the latch releasing lever at the termination of the downward movement of theguard carrying lever to protective position, as and for the purposes set forth. V

8. In a device of the character described, the combination with a pivotally mounted guard carrying lever, of a spring attached tosaid lever for balancing the weight of-the guard and lever,- a latch releasing lever and spring normally tending-to hold said latch releasing lever in position to prevent :the (latch, 'fro'm" being released, andmeans carried 'bylthefguard carrying lever for depressing Ithe'latch releasin lever against the tension of said spring at 5'18 termination of the movement of the guard carrying lever to-protective position.

9. Ina device of the character described, the combination with a pivotally mounted guard carrying lever, of a spring attached to said lever for balancing the weight of the guard and lever, a latch releasing lever, a

spring normally=tending to hold said latch releasing lever in osition to preventthelatch frombemg neleas ,and'means carriedb the guardcan'lyinglever for depressing the atch releasing ever against the tension of said spring at the-termination of the movementof the guard carrying lever to protective position, said last named means comprising a spring pressed phin er carried by. the guard carrying lever an overlying the latch releasing lever. a

10. In adevice of the character described, the combination with a pivotally mounted guard carrying lever, of a spring attached to said lever for balancing the weight of the guard and lever, a press releasing member in position to prevent the latch-from being released, and means carried by the guard carrying lever for depressing the latch releasing lever against the ,tension of said spring at the termination of the movement of the guard carrying lever to protectiveposition, said last named means comprising a spring pressed plun r carried by the guard carrying lever an overlying the press releasing member.'

11. In a safety guard attachment of the character set forth, the combination with a guard carrying member, of a press re- Correction in Letters Patent'No. 1,020,827.

members are pivotally mounted for swinging movement, there being a lost motion connection between said members.

13. In a safety guard attachment of the character set forth, the combination with a guard carrying member. of a press releasing member and a stud upon which both of said members are pivot-ally mounted, said guard carrying member being capable of -a free and independent preliminary move-: ment to protective position .with relation to [sun] Signed and sealed this 16th day of July, A. D., 1912.

the press releasing member and engaging and actuating" thepress releasing member upon continued movement.

, 14. In a safety guard attachmentof the character set forth, the combination with a guard carrying member of a press releasing member, and a'stud upon which both of said members are pivotally mounted, said guard carrying member being capable of a .t'reeand independent preliminary movement'to protective position wlth relation to the press releasing member and engaging f and actuating the press-releasing member upon continued movement, a manually operable member and a rigid connectlon between the, Inanuallv operable member and the guard carrying member.

. Slgned at- Hamilton, Ontario, this 6th, day of Noven'iber, 1911.

J AMES MELVIN ONES.

In the presence of ALFRED T. BRATTON, GERTIE NICHOLSON.

It is hereby certified that assessment).1, 20,8 7, granted March 19, 1912, upon the application of James Melvin Jones,- of Hamilton, Ontario, Canada, for an improvement in Safety-Guards for,.Stainping Presses, an error appears in the printed specification requiring correction as follows: Page 1, lines 15-16, date of patent, for March 6th, A. D; 1910 read DecemberfGt/z, A. D., 1910," and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

BILLINGS,

Acting Commissioner of Patents.

Correction in Letters Patent'No. 1,020,827.

members are pivotally mounted for swinging movement, there being a lost motion connection between said members.

13. In a safety guard attachment of the character set forth, the combination with a guard carrying member. of a press releasing member and a stud upon which both of said members are pivot-ally mounted, said guard carrying member being capable of -a free and independent preliminary move-: ment to protective position .with relation to [sun] Signed and sealed this 16th day of July, A. D., 1912.

the press releasing member and engaging and actuating" thepress releasing member upon continued movement.

, 14. In a safety guard attachmentof the character set forth, the combination with a guard carrying member of a press releasing member, and a'stud upon which both of said members are pivotally mounted, said guard carrying member being capable of a .t'reeand independent preliminary movement'to protective position wlth relation to the press releasing member and engaging f and actuating the press-releasing member upon continued movement, a manually operable member and a rigid connectlon between the, Inanuallv operable member and the guard carrying member.

. Slgned at- Hamilton, Ontario, this 6th, day of Noven'iber, 1911.

J AMES MELVIN ONES.

In the presence of ALFRED T. BRATTON, GERTIE NICHOLSON.

It is hereby certified that assessment).1, 20,8 7, granted March 19, 1912, upon the application of James Melvin Jones,- of Hamilton, Ontario, Canada, for an improvement in Safety-Guards for,.Stainping Presses, an error appears in the printed specification requiring correction as follows: Page 1, lines 15-16, date of patent, for March 6th, A. D; 1910 read DecemberfGt/z, A. D., 1910," and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

BILLINGS,

Acting Commissioner of Patents.

Correction in Letters Patent No. 1,020,827.

It is hereby certified that in Letters Patent No. 1,020,827, granted March 19, 1912, upon the application of James Melvin Jones, of Hamilton, Ontario, Canada, for an improvement in Safety-Guards for StampingPi-esses, an error appears in the printed specification requiring correction as follows: Page 1, lines 1546; date of patent, for March 6th, A. D. 1910" read December 661;, A. 0., 1.910; and that the conform to the record of the case in the Patent Oflice.

Signed and sealed this 16th day of July, A. D., 1912.

c. C. BILLINGS,

Acting Commz'ssmer of Patents.

[SEAL.]

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