US1595064A - Power-transmitting mechanism - Google Patents

Description

Aug. 10 1926.

' J. C. BARRETT rowan TRANSMITTING mscrmmsm Filed April 10, 1922 3 Sheets-Shaot 1 INVENTOR I Jfis 636M622? BY/W ATTORNEY Aug. 10 1926.

J. C. BARRETT POWER TRANSMITTING MECHANISM Filed April 10, 1922 3 Sheets-Shoat 2 INVENTOR 762! afar/65$ 8W ATTORNEY Aug. 10 192e.- 1,595,064

- J. C. BARRETT POWER TRANSMITTING MECHANISM Filed April 10. 1922 3 Sheets-Shoot s QQs v I INVENTOR I @w 3 Q 70:3 Q Barr'Zd BY fi/f ATTORNEY atented Aug. 10, 1926.

UNITED Lighted JOSEPH C. BARRETT, OF BROOKLYN", NEW YORK, ASSIGNOR T BULKRUG MACHINE CORPORATION, OF NEW YORK, 17. Y., A CGEEOE-ATIGN G3? NEW YORK.

P V ER-TRANSBEITTTHG MECHANISTM.

Application filed. April 10, 1922.

My invention relates to improvements in the class of power transmitting means set forth in U. S. Letters Patent to lVilliam Bulil, No. 1,347,076, granted July 20, 1920,

6 and No. 1,349,661, granted Aug. 17, 1920,

wherein a rotative pin cooperates with a cam groove to reciprocate a block to operate a hammer.

Qne object of my invention is to render the operation of: the reciprocative block by the pin more free and with reduced friction, and other objects are to provide improved driving means for such pin and generally to improve the class of mechanism referred to.

My invention comprises novel details of improvement that will be more. fully hereinafter set forth, and then pointed out in the claims.

Reference is to behad to the accompanying drawing forming part hereof where 1n V Figure 1 is a partly sectionalside view of a power transmitting mechanism embodying my invention;

2 is a section substantially on line in Jig. 1; r .1 ig. 3 is a transverse section taken approximately on the irregular line 3, 3, in Fig. 1;

Fig. L is a side elevation looking from the left in Fig. 1;

Fig. 5 is a detail perspective view of the cam member looking from the right hand side in Fig. 1;

6 is a view similar to Fig. 5 part being omitted;

Fig. 7 is a detail section of the crank pin member;

Fig. 8 is a'section illustrating means for operating a drill as well as a hammer, and Fig. 9 is a section on line 9, 9 in Fig. 8.

Similar numerals of reference indicate corresponding parts in the several views.

The numeral 1 indicates a suitable casing to contain the transmitting mechanism, and at 2 is a motor adapted to be securely attached to said casing, which maybe an electric-or fluid motor. The casing is shown provided with a removablefront plate. 3 detachablyretainedbyscrews or bolts In Fig.8; the casing has a removable back plate 4 =which may. be retained'. by bolts. The casing is; also provided with. a depending tubular guide member- 5', which may be de Serial No. 551,420.

tachably retained by bolts at 6. Within the casing is a reciprocative cam member 7 provided with a depending hammer, or plunger 8, that is guided within and by the guide 5. Hammer 8 is shown longitudinally fluted or grooved at 8'" for the passage of air. The hammer opposes the end of a tool A within guide 5, such as a drill or riveter, the tool having a groove (1 receiving a spring pressed ball 10 to retain the upper end of the tool in guide 5, (Fig. 1).. The member 7 has parallel sides 7 engaging anti-friction rolls 11 ournalcd on screws 12 supported by the casing, being shown attached to plate 3. The hammer 8 being guided in guide 5 and the member 7 guided between rolls 11 provides effective means for reciprocation of member 7 and the hammer with relatively small friction. The menr her 7 is provided with a curved cam slot or groove 7 within which operates a projection or crank pin 13 shown extending troma crank disk 14 supported in anti-friction bearings 15, 15, within casing 1. Crank-pin 13 is shown provided with an anti-friction sleeve or roll 13 to operate in slot 7. The shape of cam-slot 7 is some what of the general character 01" the cam slot shown in the aforesaid Letters Patent. whereby when projection 13 is rotated within said slot the cam member 7 will be reciprocated to reciprocate hammer '8. I make a portion or" the wall of cam slot 7 movable for cooperation with projection 13 to reduce friction and'wear between the parts, for which purpose I provide member 7 with a roller 16 shown Iournaled upon a projection or stud 17 preferably formed integral with member 7. The periphery of roller 16 is on the same, or substantially the same curve as surface 7 c of slot 7" both described around the axis of the roller, so that with the periphery of the roller 16- and the opposing spaced curved surface 7 the main working surfaces of cam slot 7 are provided for operation of projection 13. When projection orerank pin 13 is rotated with disk 14, in the direction-of the arrow in Fig. 2 resistance to therotation of said projection-will be relieved by its-engagement with roller .16 which will rotate as the projectionon crank pin travels inengagenient with the roller. During a relatively l e Pei tse two-P11 ri Tot-e been of projection orcrank pin 1-3 in engageent with the left hand side and lower portion of movable wall or roller 16 as viewed in 2 retreat of member '5' with hammer 8 from the work is e'ii ected, the crank-pin then being free from surface 7 and during the remainder, or nearly so, of said rotation of the crank pin it operates against ca -i surface 7 to force the member and her =ner to the work with a blow or greatly increased speed, the crank-pin then being free from roller 13. Thus the. crank-pin during its eccentric travel successively engages the movable wall or roller 16 and the surface '4'. The cam slot is shown toiuned by means of a recess 18 formed within one iiace of men her 7 (Figs. 5 and 6), within which recess the roller 16 is journaled upon stud 1'? extending from a wall of said recess. As the portion of member 7 above or beyond crankpin 13 is inoperative with said pin the slot is shown widened. so that the walls the cam-slot are free from the cranlopin a the moment of impact of the hammer, and metal above may be dispensed with, 2), since the cam slot 7 may open through the upper or outer edge of member 7. In other words, since at about the moment of impact of the hammer the crank-pin is released from cam member 7 in the upper part of the cam-slot the metal beyond the cranbpin 13 may be omitted, as distinguished from the construction shown in the storesaid patents to Buhl.

Means are provided to rotate crank-disk 14.- at a speed reduced from he speed of the motor shaft 2, as follows:

Disk lat has a worm gear or wheel 9-2 in mesh with a worm whose shaft 23 is journalec in hearings in casing 11. The bearing 23 is detachable to admit worm 23 to step its shaft below, (Fig. 1), at bearing 23 The worm 23 e2;- tends at an angle. to the axis of member 7 and worm gear 22. Sha i 23 is shown provided with a squared projection .4!) 1), to receive the corresponding recessed end of shaft 2 or" motor 2 when the motor casing is applied to casing l. The motor casing 2 is shown secured to 1 at the end opposite guide 5, and a handle B is shown attached to the motor casingso that the operator may press the tool. to the work bodily. Handle 13 is shown provided witi terminals or bindingposts for the line conductors and the leads for the. motor.

In the construction described the worm gearing described is permanently operative between the motor and crank disk 14., so that when the motor circuit switch (not shown but preferably caried on handle B in an ordinary way) is closed the member 7 will be reciprocated by the rotation of projection 13 within its cam slot or recess.

In the form shown in Figs. 8 and 9 means are provided to operatively connect disk 14 with/the motor shaft and to disconnect them.

As shown in Figs. 8 and 9 the disk 14 has a hub l l journaled within a sleeve 20, the outer end of which is ournaled in a bearing 1 in casing 1. Sleeve 20 carries worm gear 22. The free end of hub 14 is pro- 'ded with clutch member ll" (Fig. 8) to engaged by clutch members 24? on idable members 24: within sleeve 20. The utch member 2% is rotative by sleeve 20 y means of one or more studs or screws 25 extending from member 24 and operative in corresponding slots 2O insleeve. 20, (Fig. 8). The inner ends of said studs or screws ere project within a bore in member 24- to engage a groove 50 in a head 50 Sli able in said bore. The stem 26 of head 50 projects through a beari g 2? in casing 1 in position to enable its outer end to be grasped. The stem 26 is provided with annular grooves 26 to receive a stop 29, shown in the form a ball, pressed by spring 30 against stem v i hen the parts are in the position shown in Fig. 8 the tool will be idle. hen clutch members 14*, Zi are in engagement the sleeve 20, through studs 25 and said clutch members, will rotate disk 14 and crank pin 13 to actuate cam member 7. When stem 26 is pulled outwardly said clutch members will be disengaged to permit motor 2 to continue to rotate without operating cam member 7.

A further feature of my invention is that the machine may be provided with means for rotating a drill separately from the operation of the hammer, as desired. In Figs. 8 and 9 a driving clutch member or sleeve 37 is shown jonrnaled in bore 20 o fslceve 20 and provided at its inner end with clutch teeth 3'? to engage clutch teeth 24 on mem- The clutch teeth 14 and 37 areso spaced that member 2 may be in a neutral pc ltion therebetween or may be shifted to tzfith 14 or to teeth 37 to cause rotation 01" iub 1 s or sleeve 87. The member or sleeve 37 provided with gear teeth 38 in mesh with gear 39 carried by shaft 10 journaled in suitable bearings tl in casing 1. Shaft 40 is sho vn provided with means, comprising a spindle 4-2 and chuck L3, to receive a drill or tool 44 (Fig. 8). rShaft lO and tool le are shown extendingin a direction difierent from the plane of the hammer, so that one may be used without interference by the other.

hen the hammer is to be used ti clutch teeth 1 2d, are engaged by pushing stem 26 inwardly for actuating cam member 7,

as before described, and the drill will not The construction described is such that guide 5 may be removed as a unit from the hammer, the casing and front plate, and said plate may be removed for access to cam member 7 which may be removed from crank-pin l3, and said pin may be withdrawn from disk 14; through the front opening of the casing. The worm 23 may be removed through the top opening of the casing, and the clutch member 2 1 may be removed through the rear opening of the casing after the rear plate 4 has been removed. The disk 14 and its worm may be removed through the front casing opening. The sleeve 20 may be removed with one of the ball bearings 15 or 21 through the front or rear opening of the casing- The parts may be correspondin ly assembled in the casing.

My improvements provide a compact and strong tool, not liable to get out of order, and aifording improved means for actuating the hammer member 7 ith minimum of friction and danger of breakage.

Changes may be made in the ments set forth without departing spirit of my invention.

Having now described my invention, what I claim is:

l. A power transmitting mechanism con prising a reciprocative member provided with a cam slot having curved spaced walls, a wall of said slot being movable, an eccentric pin operative in said .slot in cooperation with said walls, said slot at the upper portion at the movable wall being of greater width than the diamenter of the pin to release the latter, and means to actuate said pin, the said pin being operative against a side and lower portion of the movable wall to cause retreat of the member.

A power transmitting mechanism comprising a reciprocative member provided with a cam slot, a roller journals-don said member, a portion of said roller forming part of the wall of said slot, said slot having a curved surface opposing the roller, .an eccentric pin operative in said slot in cooperation with said roller, and means to actuate said pin, the said pin being located to successively engage a side and lower portion of the roller and said curved surface to reci rocate the member.

3. A power transmitting mechanism comprising a reciprocative member provided with a cam slot, a. roller journaled on said member, a portion of said roller forming part of the wall of said slot, the periphery 5f the roller and a portion of the opposing surface of the slot being on substantially similar curves described around the axis of the roller, a crank-pin in said slot cooperative successively with a side and lower portion of said roller and with said surface to reciprocate the member, and means-to rotate said pin, the upper portion of the slotreleasing the pin at the moment or" impact of the member.

a. A power transmitting mechanism comprising a reciprocative member provided with a cam slot, the member having a hammer, walls of the slot'being in the axis of the hammer, the outer portion of said slot being open through the member, a crankpin operative in said slot, the slot having a portion wiser than the pin to release the latter during impact of the hammer, and means to rotate said crank-pin.

5. A power transmitting mechanism comprising a casing, a reciprocative member having parallel. side ed es and provided with a hammer, the casing saving spaced rollers receiving and guiding said side edges therebetween, a guide carried by the casing receiving and guiding said hammer, and means to reciprocate said member and hammer.

6. A power transmitting mechanism coma casing, a reciprocative member and hammer, means to guide said member and hammer, a disk having a crank-pin and a hub, the member having a cam-slot receiving said pin, said slot having a portion to release the pin during impact of the member a sleeve cooperative with said hub, means to operatively connect the sleeve and hub, and means to rotate said sleeve.

7. A power transmitting mechanismcomprising a casing, a reciprocative member and hammer, means to guide said member and hammer, a dish having a crank-pin and a hu the member having a cam-slot re ceiving said pin, said slot having a portion to release the pin during impact of the member, a sleeve cooperative with said hub, means to operatively connect the sleeve and hub, said sleeve having a worm wheel, and a worm meshing with said wheel.

8. A power transmitting mechanism comprising a casing, a reciprocative member and hammer, means to guide said member and hammer,a dish having a crank-pin and a hub, he memberhaving cam-slot receiving said pin, said slot having a portion to release the pin during impact of the member, a sleeve cooperative with said hub, a clutch member slidable in said sleeve to cooperate with said hub, means connecting said sleeve with said clutch member to rotate the latter, and means to rotate said sleeve.

9. A power transmitting mechanism c0n1 prising a casing, a reciprocative member and hammer, means to guide said member and hammer, a disk having a crank-pin and a hub, the member having a slot receiving said pin, a sleeve cooperative with said hub, a clutch member slidable in said sleeve to cooperate with said hub, a stud projecting from said clutch member into a slot in the liO lit)

the sleeve, shifting; head rotatively united. to said clutch. member, said head having a stem proiccting' tarough the casing, and

said stein in different set 11. A power transm tin mechanism D comprising a casing, a reciprocative memher to operate a hammer, means to reciprocate the member, a shaft separate from means to operate a tool, gearing: and a motor to actuate said and tool, and means operative to cause said gearing to actuate said means and tool separately.

12. A power transmitt lg rechanism comprising a casing, a reciprocative me1nher to op rate a hammer, a sleev gearing and a motor to actuate said sleeve, a second sleeve, a shaft to operate a tool, gearing be tween saic second sleeve and shaft, and clutch means to cause the first named sleeve to second actuate the hammer and one named sleeve separately.

13. A power transmitting mechanism comprising casing, a reciprocative member to operate a hammer, a hub, means operative between the hub and said member to actuate the latter. a second sleeve, clutch means to operate the hub and the second iamed sleeve separately by the first named sleeve, a shaft tor a tool, and gearing be- 1 A power transmitting mechanism comprising a casing, a reciprocative member to operate a hammer, a sha' z't to operate a tool, a hub within said sleeve provided with clutch teeth, means between said hub and member for operating the latter by the former, a clutch member operative within said sleeve, means to rotate the clutch memher by said sleeve, a second sleeve operative within the first named sleeve and having clutch teeth cooperative with said lutch member, and gearing between said shaft and sale second named sleeve, said clutch memher being movable with relation to said clutch teeth to cause operation of said hub and the second named sleeve separately.

15. A power transmitting mechanism comprising a casing, member operativein he casing to actuate a hammer, a shaft for a tool journaled in the casing at an to said member, a motor, gearing; to actuate said member and shaft, and clutch means to cause said gearing to actuate said member and said shaft separately.

16. A power transmitting mechan sm comprising a casing, a reciprocative member provided with a cam slot and a hammer, the casing having guiding means for said member, a guide for the hammer entcnding from one side of the casing, a ro- 'Qi-JQ member within the casingand provided with a crank pin operative in said cam slot, a worm gear to actuate said rotative member, a worm'in mesh with said and extending at an angle to the axis aid rotative member, a motor and its casing attachec LO the first named casing on the side opposite said guide, means to rotatively connect said shaft and worm, and a handle on said motor casing.

' transmitting ii. A power iechanism comprising a reciprocative member provided with a recess located within one face of said member and having a projection within said recess, a roller journaled' on said projection within said recess and spaced from a wall or" said recess, said roller and said wall forming a cam-slot, a crank-pin operative in said slot successively against its said wall and the rol er, the cam-slot be ingwider than the pin to release the pin for impact of the member, and means to rotate said cranli-pin.

Signed at New York city, in the county of New York and State of New York, this th day of Aprll, A. D. 1922.

JOSEPH C. BARRETT,

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