US1823644A - Nailing machine - Google Patents

Nailing machine Download PDF

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US1823644A
US1823644A US523968A US52396831A US1823644A US 1823644 A US1823644 A US 1823644A US 523968 A US523968 A US 523968A US 52396831 A US52396831 A US 52396831A US 1823644 A US1823644 A US 1823644A
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shaft
hammer
clutch member
clutch
rock shaft
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US523968A
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Cossock Ralph
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27FDOVETAILED WORK; TENONS; SLOTTING MACHINES FOR WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES
    • B27F7/00Nailing or stapling; Nailed or stapled work
    • B27F7/02Nailing machines

Definitions

  • My invention relates to machines for drivin nails. w
  • An essential objectof my invention is to utilize in automaticnail driving the advantages inherent in the oscillatory or swinging movement of a hammer heretofore attained only by the natural movement of the human arm.
  • Another object is to combine with the means for actuating the power stroke of the oscillator hammer, a novel means for returning tile latter to idle position.
  • Additional objects are'to utilize a stroke of a swinging or oscillatory hammer for actuating the nail carrying stri and for setting in operation the means for returnin the hammer to original osition, and to utilize the return stroke of t e hammer for putting out of operation the hammer returning means.
  • Figures 1, 2, 3 an tion, a plan view, an end elevation, and a rear elevation respectively of a nailing machaine embodying my invention.
  • the framework of my machine maybe of any.form most convenient for carrying the operative. arts.
  • theframe 12 comprises a longitudinally disposed table 14 cast with an'intermediate portion of which is the intermediate portion of a transversely dis- --posed verticall faced bar of web 16.
  • a rectangular downwar ly directed extension 23 comprises a floor 25, a back wall 26 extending from the rear; end of the web 16 to the adjacent sideof the housing 18 an outer end wall 28 integral with the housing and a front wall 30 formed by the enlarged inner end of a longitudinally disposed web 31 depending from the table 14. Cast with.
  • leg 33 inte ral with a forwardly directe foot 35.
  • est with the end of the web is a cylindrical upright enlargement 36, above a nearly semicircular enlargement interval at its lower end with the foot 35 and provided with a plane front face 38., A portion of the enlargement 36 partly overhangs the foot.
  • legs 39 and '40 Cooperating with the leg 33 are legs 39 and '40, fixed by bolts 41 and 42 respectively, to the frame parts 14 and 21, and provided with terminal eet 43 .and 44 respectively.
  • An electric motor 47 is attached to the plate 21 by bolts or screws 49 pasing throughthe attaching lugs 50 of the motor casing, or otherwise.
  • the motor shaft 52 fast in the hub 54 of a disk or fly wheel 55, constituting one member of a friction clutch, partially enclosed: in the housing 18 whose inner and outer walls 57 and 58 are centrally provided with semicircular openings 59 and 60.
  • The'housing is completed by a peripheral rim.
  • the hub 54 is loose in and concentric with the opening 60.
  • a friction disk 61 which includes a metal body 62 and a facing or lining 63 of frictional material engageable with the cooperating disk 55.
  • the two I members of a friction clutch. The disk 61 has a hub 65 extending through the opening 59 of the housing, and in which is fast a longitudinally reciprocable rock shaft 67 (in alignment with the shaft 52 and drives thereby when the described clutch members are in contact with each other.
  • a bearing 69 for the shaft 67 comprises a standard 70 integral with the table 14, and
  • a second bearing 77 for this shaft includes a standard 78 and a head 79.
  • An annular shoulder member 81 upon the shaft intermediate the two bearin comprises a collar 82 fast to the shaft an in this instance, an antifriction bearing adjacent thereto comprising racewa disks 84 loose on the shaft embracing bal s 85.
  • a helical spring. 87 surrounding the shaft 67 has its ends abutting against the member 81 and the bearing head 73.
  • An oscillatory haminer 89 comprisin a helve or shaft 90 and head 91, is provide in it send or hub portion, as shown in Figure 2, with a bore 92 through which the shaft 67 slidably passes, and with a longitudinal groove 93 communicating therewith to receive a spline 94 seated in the shaft andslidable in the groove.
  • the hammer is radially fast to the shaft while the latter .isaxially slidable relatively to the hammer.
  • a standard 96 Fixed to or integral with the frame and eonstitutin a art thereof is a standard 96 provide wit a bifurcated upper portion to form ears 98 to receive a pintle 99 upon which is pivoted intermediate its len h an operating handle 100.
  • IntermedIate the len h of the arm 106 is a pin 108; and integra with this arm, as shown in Flgure 2, is a finger or extension 109 disposed at right angles thereto.
  • a vertical bearing plate 114 has upon its lower ends hinge sleeves 115 interengaging hinge sleeves 116 upon the attaching plate through which extends a ntle 117.
  • the plate 114 has its upper end lfurcated by a vertical slot 119, as shown in Figure 2, to loosely admit therethrough the shaft 67.
  • the u per end of the bearing plate has an inturn flange 121 overlapping the toggle arm extension 109.
  • a lug 123 integral with a lateral edge of the bearing plate 114 has a longitudinal guide slot 125 m which loosely registers the pin 108.
  • An upright latch lever 127 is pivoted intermediate the length of its shank 128 upon a pin 129 near the inner end of the operating lever 100, and its beak 131 normally overlaps the member 106 at the apex or elbow of the tog le, and is induced to such position by a helica spring 133 attached at one end to the lower end of the latch, and at its other to a pin 136 in the table 14.
  • a cam 138 comprises a sleeve 139 fixed to the rock shaft 67 and a curved cam finger 141 extending radially therefrom engageable with the lower end of the latch lever 127. The sleeve 139 normally abuts against the bearing head 79.
  • a nailing anvil or plunger 145 has a head 146 and is slidably mounted in a central vertical bore orideway 147 in the enlar ed portion 36 o? the frame and is mova le through an opening 149 in the foot 35.
  • the head of the anvil is in the path of the hammer head in its forward or power stroke which causes one of the nails 151, in alignment with and below the anvil, tov be torn from its paper nailcarrying strip '153 and be driven into the work.
  • the roll 165 is frictionally driven by its companion roll 166 andis adjustable there- 'from by adjusting screws 176 engaging its shaft ends 167.
  • the nail loaded end of the strip 153 is formed into a package roll or scroll 178, as shown in Figure 2, resting on end loosely in a substantially cylindrical container 180 provided with a vertical slot 181 to admit the passage of the traveling t strip transversely of the face 38 of the frame portion 37 In passing, the top and bottom margins of the strip travel in rearwardly inclined, longitudinally disposed, guide slots shown in Figures 1 and 3.
  • the mechanism for actuating the roll 166 is a depending L shaped bracket 186 fixed by screws 187 to an intermediate portion of the helve 90, and to which is pivoted by a pin 189 the rear end of a rod 190 upon which slides a sleeve 192. Near the-free end of the rod is mounted a slidable stop 194 adjustable by a set screw 195. Pivoted at its upper end to a lug 196 upon the bottom of the sleeve by a pin 197 is a lever 198 pivoted intermediate its length by a pin 199 to the end of anarm 200 integral with the web 16.
  • Pivoted to the lower end of the lever 198 by a pin 201 is the rear end of a push rod 202 slidable in a bearing 204 pivoted on a pin 206 in the end of a stud 208 integral with the web 16.
  • a spiral spring 209 connects the upper portion of the lever 198 with the rear portion of the push rod 202.
  • the forward ortion of the rod is flat, and depending roni its end is a tooth or pawl 210 having beveled rear face. This pawl is adapted to successively engage a plurality of ratchet teeth 214 upon the top of roll 166.
  • the described roll operating mechanism is actuated by the hammer 89.
  • the hammer 89 When the latter returns from its power stroke to the position shown in broken lines in Figure 3 it carries the bracket 186 rearwardly, drawing the rod 190 through the sleeve until the latter is engaged by, and sufliciently moved the stop 194 to usb the rod 202, and thus, through the paw advancethe roll 166 a step, which in turn, cooperating with the roll 165, advances a nail into alignment with the plunger 145 preparatory to the next power stroke of the hammer.
  • the lock lever 223 will be hereinafter adverted Slidable in a transverse groove 231 in the floor is the base 232 of a block 233 beside the rear end of the lever 223, as shown in Figures 2 and 3, in which block is journaled a s aft 235 which passes throu h an oblong opening 236 in the wall 28, an 'upon whose outer" end, as shown in Figure 4, is mounted a friction roll 238 engaging the periphery of the driving disk 55 through an opening 240 in the housing.
  • a winding roll 242 Fast to the opposite end of the shaft 235 is a winding roll 242, to which is attached one end of a cord or the like 244 passing over a guide roll or sheave 246 mounted on a pin 247 in a bracket 249 fast to the back wall 26 of the extension, and attached attits forward end to a pin 251 in the upper portion of a fulcrum arm 254 whose lower or hub ortion 256 is loose on the shaft 67 and, in this instance, located in the space 75 between the bearing heads 73 and 74. Also attached to the pin 251 is one end of a cord or the like 258 whose other end is attached to a lug 260.
  • the driving disk 55 thus returns the hammer from its working position to its idle p0? sition through the operation of the roll 238, shaft 235, winding roll 242, and the cords fulcrumed by the lever 254.
  • the described winding operation is discontinued prior to stroke of the hammer by the following means.
  • the web 16 Near its rear end the web 16 is provided with a vertical bore 262, as shown in Figure 3, to slidably receive therethrough a rod or lunger 264 having upon its upper end a ead or shoulder 265.
  • a spring 266 upon the rod has its endsengaging the head and upper face of the web.
  • a bell crank lever 268 includes a rock shaft 269 journaled in a sleeve 270 upon the end of a rearwardly directed bracket 272 fixed to the extension wall 26; an upward] inclined forked lever arm 275 upon one end 277 to receive a pin 279 in the lower rtion of the rod 264; and a downwardly 'rected forked lever arm 281 having slots 283 to receive a pin 284 in the rear end of a horizontal thrust rod 286 slidable in a bearing 288 in the wall 26 with a broad head 290 adapted to abut against the block 233 and extending laterally thereof below the end of the lock lever 223.
  • a helical spring 292 on the rod 286 presses against the head 290 andthe wall 26.
  • the described means is operated as follows. As the hammer in its retreat stroke ap roaches the broken line position it strikes an depresses the plunger 264, which rocks the bell crank lever 268 thereby withdrawing the head 290 of the rod 286 from the slidable block 233, which through the impulse of a spring 294, attached to a pin 295 in the block and an eye 296 on the wall 26 imeils the friction wheel 238, carried by the lock, out of contact with the driving disk 55.
  • I claim 1 In a nailing machine, a drivin shaft, a driving clutch member on the s aft, a longitudinally reciprocable rock shaft, a driven clutch member on the rock shaft moving into and out of contact with the driving clutch member, a spring for actuating the rock shaft in one direction, a toggle device for intermittently actuating the rock 219 against trips shaft in the other direction, an oscillatory hammer comprising a helve mounted at one end upon the rock shaft, and a head upon the other end of the helve, and a na' ing anvil in the path of the head.
  • a nailin machine a drivin shaft, a driving clutc member on the s aft, a longitudinally reciprocable rock shaft, a
  • a driving shaft a clutch member on the shaft, a longitudinally reciprocable rock shaft, a clutch member on the rock shaft engageable with the first clutch member when the rock shaft is moved longitudinally in one direction, stationary hearings in which the rock shaft is loosely mounted, a hammer splined to the shaft between the bearings, a shoulder fast to the rock shaft a spring on the rock shaft engaging one side of the shoulder for se arating the clutch member, a compressib y togglle device acting upon the opposite side f t e shoulder for interenga ing the clutch members when the toggle evice is compressed, a vibratory latch lever for compressin the to gle device, and a cam on the mo shaft tuned to trip the latch lever and release the toggle device after the clutch members have been interengaged.
  • a continuously rotating driving shaft a clutch member fast 1 a power stroke to thehammer, and a nailing anvil in the path of the hammer.
  • a continuously rotating driving shaft a clutch member fast to the shaft, a longitudinally reciprocatory rock shaft, a clutch member fast to the rock shaft and engagable with the first member, a swinging hammer fast to the rock shaft free to travel approximately 180 degrees, and means for forcing the second clutch member into engagement with the first clutch member to impart a power stroke to the hammer.
  • a continuousl rotating driving shaft a driving clutch member fast to the shaft, a longitudinall reciprocatory rock shaft, a driven clutc member fast to the rock shaft and engageias ing anvil in the path of the hammer, and means actuated by the driving clutch memher during its continued revolution for reversing the strolre of the hammer.
  • a continuously rotating driving shaft a clutch member fast to the shaft, a longitudinally reciprocatory rock shaft, a clutch member fast to the rock shaft epgageable with the first clutch member, stationary hearings in which-the rock shaft is journaled, a hammer retained between the bearing and splinedto the shaft,
  • a fulcrum arm pivotally mounted on the rock shaft adjacent the hammer, a strand connecting the outer end of the hammer with the upper portion of the fulcrum arm, a rotary winding roll in the rear of the path of the hammer, a flexible member supported at one end by the upper portion of the fulcrum arm and attached at its rear winding roll, and means operated by the first clutch member during its continued revolution for actuating the winding roll.
  • a continuously rotating driving shaft a clutch member fast to the shaft, a longitudinally reciprocatory rock shaft, a clutch member fast to the rock shaft engageable with the first clutch mem ber, stationary hearings in which the rock sha is journaled, a hammer retained between the bearings and splined to the shaft,
  • a continuously rotating driving shaft a to the shaft, a longitudinally reciprocatory rock shaft, a clutch member fast to the rock shaft engageable with the first clutch member, stationary bearings in which the rock sha is journaled, a hammer retained between the bearings and splined to the shaft, means for forcing the second clutch memwith the first clutch member during a partial revolution of the driving clutch member to impart a power stroke to the hammer, a nailing anvil in the path of the hammer, means actuated by the first clutch member during its continued revolution for reversing the direction of clutch member fast signature.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Portable Nailing Machines And Staplers (AREA)

Description

Sept. 15, 1931.
R. cossocK 1,823,644
NAILING MACHINE Filed March 20, 19-31 4 Sheets-Sheet 1 Sept. 15, 1931. R. cossocK NAILING MACHINE 4 Sheets-Sheet 2 Filed March 20, 1951 Iii 7275; 2x532 dssacz.
ldllllllllflllill 36 3i E5, 3931.; R. cossocK v fi NAILING MACHINE Filed March 23, 1931 4 Sheets-Shee t 3 Iva 2777;;
,ZZQZVZ ZaaacZ Sept 15, 1&3 R COSSOCK 1,823fi44 NAILING MACHINE Filed March 20, 1931 4 Sheets-Sheet 4 Patented Sept. 15, 1931 PATENT OFFICE aura cossotk, or PROVIDENCE, anonn ISLAND ammo; mcn'nm Application filed March 20, 1981. Serial No. 523,888.
My invention relates to machines for drivin nails. w
eretofore the use of hammers in nailing machines has been limited to plungers or 'U the like of a rectilineally reciprocable character.
An essential objectof my invention is to utilize in automaticnail driving the advantages inherent in the oscillatory or swinging movement of a hammer heretofore attained only by the natural movement of the human arm.
Another object is to combine with the means for actuating the power stroke of the oscillator hammer, a novel means for returning tile latter to idle position.
Additional objects are'to utilize a stroke of a swinging or oscillatory hammer for actuating the nail carrying stri and for setting in operation the means for returnin the hammer to original osition, and to utilize the return stroke of t e hammer for putting out of operation the hammer returning means.
Further objects are to insure a maximum ower of stroke, accuracy of coordination tween the hammer blows and the advanc; ing nails, facility of operation, portability, and ,inexpensiveness of construct1on.
To the above ends essentially, but not exclusively, my invention consists in such parts and in such combinations of arts as fall within the scope of the appen ed claims.
In the accompanying drawings which form a part of this s clfication,
Figures 1, 2, 3 an tion, a plan view, an end elevation, and a rear elevation respectively of a nailing machaine embodying my invention.
Like characters of reference indicate like parts throughout the views.
The framework of my machine maybe of any.form most convenient for carrying the operative. arts.
As herein shown theframe 12comprises a longitudinally disposed table 14 cast with an'intermediate portion of which is the intermediate portion of a transversely dis- --posed verticall faced bar of web 16. The
inner end of t e table is integral with one 4 are a front elevadisks constitute the cooperating contacting of the sides of a transversely disposed upright semicircular housing 18, to whose other side is fixed by bolts 19 or otherwise the flange 20 of a vertically and longitudi nally directed mounting late or backing 21. A rectangular downwar ly directed extension 23 comprises a floor 25, a back wall 26 extending from the rear; end of the web 16 to the adjacent sideof the housing 18 an outer end wall 28 integral with the housing and a front wall 30 formed by the enlarged inner end of a longitudinally disposed web 31 depending from the table 14. Cast with.
the 'web 16 at a point behind its forward end is a downwardly and forwardly directed flat triangular leg or su port 33 inte ral with a forwardly directe foot 35. est with the end of the web is a cylindrical upright enlargement 36, above a nearly semicircular enlargement interval at its lower end with the foot 35 and provided with a plane front face 38., A portion of the enlargement 36 partly overhangs the foot. Cooperating with the leg 33 are legs 39 and '40, fixed by bolts 41 and 42 respectively, to the frame parts 14 and 21, and provided with terminal eet 43 .and 44 respectively. I
An electric motor 47 is attached to the plate 21 by bolts or screws 49 pasing throughthe attaching lugs 50 of the motor casing, or otherwise. The motor shaft 52 fast in the hub 54 of a disk or fly wheel 55, constituting one member of a friction clutch, partially enclosed: in the housing 18 whose inner and outer walls 57 and 58 are centrally provided with semicircular openings 59 and 60. The'housing is completed by a peripheral rim. The hub 54 is loose in and concentric with the opening 60.
In the housing is a friction disk 61 which includesa metal body 62 and a facing or lining 63 of frictional material engageable with the cooperating disk 55. The two I members of a friction clutch.. The disk 61 has a hub 65 extending through the opening 59 of the housing, and in which is fast a longitudinally reciprocable rock shaft 67 (in alignment with the shaft 52 and drives thereby when the described clutch members are in contact with each other.
A bearing 69 for the shaft 67 comprises a standard 70 integral with the table 14, and
two heads 73 and 74 interspaced as at 75. A second bearing 77 for this shaft includes a standard 78 and a head 79. An annular shoulder member 81 upon the shaft intermediate the two bearin comprises a collar 82 fast to the shaft an in this instance, an antifriction bearing adjacent thereto comprising racewa disks 84 loose on the shaft embracing bal s 85. A helical spring. 87 surrounding the shaft 67 has its ends abutting against the member 81 and the bearing head 73.
An oscillatory haminer 89, comprisin a helve or shaft 90 and head 91, is provide in it send or hub portion, as shown in Figure 2, with a bore 92 through which the shaft 67 slidably passes, and with a longitudinal groove 93 communicating therewith to receive a spline 94 seated in the shaft andslidable in the groove. Thus the hammer is radially fast to the shaft while the latter .isaxially slidable relatively to the hammer.
"Cooperating with the spring 87 to longitudinally reciprocate the shaft is a mechanism operating upon the toggle principle,
about to be described.
Fixed to or integral with the frame and eonstitutin a art thereof is a standard 96 provide wit a bifurcated upper portion to form ears 98 to receive a pintle 99 upon which is pivoted intermediate its len h an operating handle 100. There is a ateral inclined arm or extension101 'inte al with the standard sup orting one end 0 a toggle 102 as follows. 0 the upper end of the extension is pivoted by a pin 103 the outer end of a to gle plate or arm 104. The inner end of the Tatter is connected to the corresponding end of a second toggle arm 106 by a povot pin 107. IntermedIate the len h of the arm 106 is a pin 108; and integra with this arm, as shown in Flgure 2, is a finger or extension 109 disposed at right angles thereto.
.Adjacent the standard 96 is an attaching plate 111 fixed to the table 14 by screws 112 or otherwise. A vertical bearing plate 114 has upon its lower ends hinge sleeves 115 interengaging hinge sleeves 116 upon the attaching plate through which extends a ntle 117. The plate 114 has its upper end lfurcated by a vertical slot 119, as shown in Figure 2, to loosely admit therethrough the shaft 67. The u per end of the bearing plate has an inturn flange 121 overlapping the toggle arm extension 109. A lug 123 integral with a lateral edge of the bearing plate 114 has a longitudinal guide slot 125 m which loosely registers the pin 108.
An upright latch lever 127, as shown in Figure 3, is pivoted intermediate the length of its shank 128 upon a pin 129 near the inner end of the operating lever 100, and its beak 131 normally overlaps the member 106 at the apex or elbow of the tog le, and is induced to such position by a helica spring 133 attached at one end to the lower end of the latch, and at its other to a pin 136 in the table 14. A cam 138 comprises a sleeve 139 fixed to the rock shaft 67 and a curved cam finger 141 extending radially therefrom engageable with the lower end of the latch lever 127. The sleeve 139 normally abuts against the bearing head 79.
The operation of the toggle .and clutch shoulder member 81, compressing the spring '87 and forcing the clutch disk 61 into contact with constantly rotating drivin clutch disk 55, and instantly propels the ammer in its driving stroke.
At the close of the propelling impulse the cam finger 141 strikes the lower portion of the latch lever 127 and tilts it out of engagement with the toggle to the position shown in broken lines in Figure 3, ermitting the latter to resume its ori ina undepressed elevated position under t e influence of the spring 87 which simultaneously separates the two clutch disks 61 and 55. The instant the cam finger has released the latch lever the latter is returned to its original position under the influence of the spring 133.
A nailing anvil or plunger 145 has a head 146 and is slidably mounted in a central vertical bore orideway 147 in the enlar ed portion 36 o? the frame and is mova le through an opening 149 in the foot 35. The head of the anvil is in the path of the hammer head in its forward or power stroke which causes one of the nails 151, in alignment with and below the anvil, tov be torn from its paper nailcarrying strip '153 and be driven into the work.
When not engaged b the hammer, the anvil is maintained in t e elevated position indicated in broken lines in Figure 3. A post 155 fast to the guide portion 36 of the frame of the frame portion 3.
183 in the face 38, as
b forwardly The roll 165 is frictionally driven by its companion roll 166 andis adjustable there- 'from by adjusting screws 176 engaging its shaft ends 167. The nail loaded end of the strip 153 is formed into a package roll or scroll 178, as shown in Figure 2, resting on end loosely in a substantially cylindrical container 180 provided with a vertical slot 181 to admit the passage of the traveling t strip transversely of the face 38 of the frame portion 37 In passing, the top and bottom margins of the strip travel in rearwardly inclined, longitudinally disposed, guide slots shown in Figures 1 and 3. y
The mechanism for actuating the roll 166, as shown in the last mentioned figures, is a depending L shaped bracket 186 fixed by screws 187 to an intermediate portion of the helve 90, and to which is pivoted by a pin 189 the rear end of a rod 190 upon which slides a sleeve 192. Near the-free end of the rod is mounted a slidable stop 194 adjustable by a set screw 195. Pivoted at its upper end to a lug 196 upon the bottom of the sleeve by a pin 197 is a lever 198 pivoted intermediate its length by a pin 199 to the end of anarm 200 integral with the web 16. Pivoted to the lower end of the lever 198 by a pin 201 is the rear end of a push rod 202 slidable in a bearing 204 pivoted on a pin 206 in the end of a stud 208 integral with the web 16. A spiral spring 209 connects the upper portion of the lever 198 with the rear portion of the push rod 202.
The forward ortion of the rod is flat, and depending roni its end is a tooth or pawl 210 having beveled rear face. This pawl is adapted to successively engage a plurality of ratchet teeth 214 upon the top of roll 166.
The described roll operating mechanism is actuated by the hammer 89. When the latter returns from its power stroke to the position shown in broken lines in Figure 3 it carries the bracket 186 rearwardly, drawing the rod 190 through the sleeve until the latter is engaged by, and sufliciently moved the stop 194 to usb the rod 202, and thus, through the paw advancethe roll 166 a step, which in turn, cooperating with the roll 165, advances a nail into alignment with the plunger 145 preparatory to the next power stroke of the hammer.
The following mechanism is employed for returning the after the cam 138, acting on the latch lever 127, has released the clutch. When the hammer has reached nearly a horizontal position in its downward forward travel, a stud 218 a vertical front face and a the working tilt the lever 198 and hammer to rearmost position thereon, as shown in Figure 3, strikes and depresses a vertical rod 219 slidable in a bore 220 in the web 16. The lower end of the rod is pivotally connected, as at 222, to a lever 223 passing through an opening 224 in the housing wall 30 and pivoted intermediate its length to a stud 226 on the wall 28 of the extension. Near its rear end the lever has a pin 227 to which is attached a helical spring 228 whose lower end is attached to an eye 229 in the floor 25. The lock lever 223 will be hereinafter adverted Slidable in a transverse groove 231 in the floor is the base 232 of a block 233 beside the rear end of the lever 223, as shown in Figures 2 and 3, in which block is journaled a s aft 235 which passes throu h an oblong opening 236 in the wall 28, an 'upon whose outer" end, as shown in Figure 4, is mounted a friction roll 238 engaging the periphery of the driving disk 55 through an opening 240 in the housing. Fast to the opposite end of the shaft 235 is a winding roll 242, to which is attached one end of a cord or the like 244 passing over a guide roll or sheave 246 mounted on a pin 247 in a bracket 249 fast to the back wall 26 of the extension, and attached attits forward end to a pin 251 in the upper portion of a fulcrum arm 254 whose lower or hub ortion 256 is loose on the shaft 67 and, in this instance, located in the space 75 between the bearing heads 73 and 74. Also attached to the pin 251 is one end of a cord or the like 258 whose other end is attached to a lug 260.
The driving disk 55 thus returns the hammer from its working position to its idle p0? sition through the operation of the roll 238, shaft 235, winding roll 242, and the cords fulcrumed by the lever 254. The described winding operation is discontinued prior to stroke of the hammer by the following means. By utilizing the fulcruming deviceiit is possible to secure an arc of movement of the hammer of about 180 degrees, resulting in increased momentum.
Near its rear end the web 16 is provided with a vertical bore 262, as shown in Figure 3, to slidably receive therethrough a rod or lunger 264 having upon its upper end a ead or shoulder 265. A spring 266 upon the rod has its endsengaging the head and upper face of the web. A bell crank lever 268 includes a rock shaft 269 journaled in a sleeve 270 upon the end of a rearwardly directed bracket 272 fixed to the extension wall 26; an upward] inclined forked lever arm 275 upon one end 277 to receive a pin 279 in the lower rtion of the rod 264; and a downwardly 'rected forked lever arm 281 having slots 283 to receive a pin 284 in the rear end of a horizontal thrust rod 286 slidable in a bearing 288 in the wall 26 with a broad head 290 adapted to abut against the block 233 and extending laterally thereof below the end of the lock lever 223. A helical spring 292 on the rod 286 presses against the head 290 andthe wall 26.
The described means is operated as follows. As the hammer in its retreat stroke ap roaches the broken line position it strikes an depresses the plunger 264, which rocks the bell crank lever 268 thereby withdrawing the head 290 of the rod 286 from the slidable block 233, which through the impulse of a spring 294, attached to a pin 295 in the block and an eye 296 on the wall 26 imeils the friction wheel 238, carried by the lock, out of contact with the driving disk 55.
Instantly upon the withdrawal of the plunger 286 the spring 228 has forced the rear end of the lock lever 223 downwardly into a substantially horizontal position abutting against the front face of the head 290, so as to lock the latter against forward movement until the next hammer through the ro the lock lever 223. p
The employment of a rotary driving member for imparting the working stroke of the swingin hammer is more powerful than is attainab e by the use of rectilineally reciprocating hammers. This power is further enhanced by the possible extent of movement of the hammer in an arc of approximately 180 degrees whereby increased momentum is afforded. B virtue of the swingin movement of the ammer, back thrust against the machine frame is absent, hence even a light machine will retain its seated position. 7 y
I claim 1. In a nailing machine, a drivin shaft, a driving clutch member on the s aft, a longitudinally reciprocable rock shaft, a driven clutch member on the rock shaft moving into and out of contact with the driving clutch member, a spring for actuating the rock shaft in one direction, a toggle device for intermittently actuating the rock 219 against trips shaft in the other direction, an oscillatory hammer comprising a helve mounted at one end upon the rock shaft, and a head upon the other end of the helve, and a na' ing anvil in the path of the head.
2. In a nailin machine, a drivin shaft, a driving clutc member on the s aft, a longitudinally reciprocable rock shaft, a
' driven clutch member on the rock shaft movable into and out of contact with the driving clutch, a. spring for moving the rock shaft in one direction, means for alters nately moving the rock shaft in the other direction, a hammer s lined to the shaft, and a nailing anvil in t epath of the hammer.
. 3. In a nailing machine, a driving shaft, a driving clutch member fast to the shaft,
ower stroke of the 0 a longitudinall reciprocable rock shaft, a driven clutch ast to the rock shaft movable into and out of contact with the driving clutch member, means for reciprocatin the rock shaft interspaced hearings in whic the rock shaft is mounted, an oscillato hammer longitudinally loose upon the sha and retained against movement longitudinally thereof by the bearing heads, and a nailing anvil in the path of the hammer.
4. In a nailing machine, a driving shaft, a clutch member on the shaft, a longitudinally reciprocable rock shaft, a clutch member on the rock shaft engageable with the first clutch member when the rock shaft is moved longitudinally in one direction, stationary hearings in which the rock shaft is loosely mounted, a hammer splined to the shaft between the bearings, a shoulder fast to the rock shaft a spring on the rock shaft engaging one side of the shoulder for se arating the clutch member, a compressib y togglle device acting upon the opposite side f t e shoulder for interenga ing the clutch members when the toggle evice is compressed, a vibratory latch lever for compressin the to gle device, and a cam on the mo shaft tuned to trip the latch lever and release the toggle device after the clutch members have been interengaged.
5. In a nailing machine, a continuously rotating driving shaft, a clutch member fast 1 a power stroke to thehammer, and a nailing anvil in the path of the hammer.
6. In a nailing machine, a continuously rotating driving shaft, a clutch member fast to the shaft, a longitudinally reciprocatory rock shaft, a clutch member fast to the rock shaft and engagable with the first member, a swinging hammer fast to the rock shaft free to travel approximately 180 degrees, and means for forcing the second clutch member into engagement with the first clutch member to impart a power stroke to the hammer.
7. In a nailing machine, a continuousl rotating driving shaft, a driving clutch member fast to the shaft, a longitudinall reciprocatory rock shaft, a driven clutc member fast to the rock shaft and engageias ing anvil in the path of the hammer, and means actuated by the driving clutch memher during its continued revolution for reversing the strolre of the hammer.
8. In a nailing machine, a continuously rotating driving shaft, a clutch member fast to the shaft, a longitudinally reciprocatory rock shaft, a clutch member fast to the rock shaft epgageable with the first clutch member, stationary hearings in which-the rock shaft is journaled, a hammer retained between the bearing and splinedto the shaft,
means for forcing the second clutch member into engagement with the first clutch memher during a partial revolution of thedriving clutch to impart a power stroke to the hammer, a fulcrum arm pivotally mounted on the rock shaft adjacent the hammer, a strand connecting the outer end of the hammer with the upper portion of the fulcrum arm, a rotary winding roll in the rear of the path of the hammer, a flexible member supported at one end by the upper portion of the fulcrum arm and attached at its rear winding roll, and means operated by the first clutch member during its continued revolution for actuating the winding roll.
9. In a nailing machine, a continuously rotating driving shaft, a clutch member fast to the shaft, a longitudinally reciprocatory rock shaft, a clutch member fast to the rock shaft engageable with the first clutch mem ber, stationary hearings in which the rock sha is journaled, a hammer retained between the bearings and splined to the shaft,
means for forcing the second clutch member into engagement with the first clutch member during a partial revolution of the driving clutch member to impart a power stroke to the hammer, a nailing anvil in the path of the hammer, means actuated by the first clutch member during its continued revolution for reversing the direction of travel of the hammer, a nail carrying strip in the path of the anvil, intermittently rotatable rolls for advancing the strip to the anvil, and means actuated by the hammer for operating the rolls.
0 In a nailing machine, a continuously rotating driving shaft, a to the shaft, a longitudinally reciprocatory rock shaft, a clutch member fast to the rock shaft engageable with the first clutch member, stationary bearings in which the rock sha is journaled, a hammer retained between the bearings and splined to the shaft, means for forcing the second clutch memwith the first clutch member during a partial revolution of the driving clutch member to impart a power stroke to the hammer, a nailing anvil in the path of the hammer, means actuated by the first clutch member during its continued revolution for reversing the direction of clutch member fast signature.
RALPH COSSOCK.
US523968A 1931-03-20 1931-03-20 Nailing machine Expired - Lifetime US1823644A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4042036A (en) * 1973-10-04 1977-08-16 Smith James E Electric impact tool
US4204622A (en) * 1975-05-23 1980-05-27 Cunningham James D Electric impact tool
US4449660A (en) * 1981-04-30 1984-05-22 Black & Decker Inc. Fastener tool
US4583600A (en) * 1981-04-30 1986-04-22 Black & Decker Inc. Impact tool
EP0613760A1 (en) * 1993-02-03 1994-09-07 Sencorp Electromechanical fastener driving tool
US6604666B1 (en) 2001-08-20 2003-08-12 Tricord Solutions, Inc. Portable electrical motor driven nail gun
US20070272422A1 (en) * 2006-05-23 2007-11-29 Black & Decker, Inc. Depth adjustment for fastening tool

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4042036A (en) * 1973-10-04 1977-08-16 Smith James E Electric impact tool
US4204622A (en) * 1975-05-23 1980-05-27 Cunningham James D Electric impact tool
US4449660A (en) * 1981-04-30 1984-05-22 Black & Decker Inc. Fastener tool
US4583600A (en) * 1981-04-30 1986-04-22 Black & Decker Inc. Impact tool
EP0613760A1 (en) * 1993-02-03 1994-09-07 Sencorp Electromechanical fastener driving tool
US6604666B1 (en) 2001-08-20 2003-08-12 Tricord Solutions, Inc. Portable electrical motor driven nail gun
US6766935B2 (en) 2001-08-20 2004-07-27 Tricord Solutions, Inc. Modified electrical motor driven nail gun
US20070272422A1 (en) * 2006-05-23 2007-11-29 Black & Decker, Inc. Depth adjustment for fastening tool
US8550324B2 (en) 2006-05-23 2013-10-08 Black & Decker Inc. Depth adjustment for fastening tool

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