US740219A - Carrier for gluing-clamps. - Google Patents

Description

PATBNTED SEPT. 29, 1903.

N. J. BILLSTRDM. CARRIER FOR GLUING GLAMPS.

APPLICATION FILED MAE. 27, 1908.

No Mo'nm..

2 SHEETS-SHEET l.

Q m ONO w .mw El No. 740,219. PATENTBD SEPT. 29, 1993.

` N. J. BILLSTROM. y

f CARRIER POR GLUING GLAMPS.l

APPLIGMJION FILED ma. 27. 1999. No nonni.. 9 SHEETS-SHEET a.

UNITED STATES Patented September 29, 1.903.

NELS J. BILLSTROM, OF ROOKFORD, ILLINOIS.

CARRIER FOR GLUiNG-CLAMPS.

SPECIFICATION forming part of Letters Patent No. 740,219, dated September 29, 1903. Application filed March 27, 1903. Serial No. 149,855. (No model.)

.To MZ whom it may concern: Y

Be it known that I, Nuns J. BILLsTRoM, a

citizen ofthe United States, residing at Rockford, in the county of Winnebago and State of Illinois, have invented certain new and useful Improvements in Carriers for gluing- Clamps, of which the following is a specification.

The object of this invention is toconstruct a machine su pporting a series of screw-clamps carried by an endless carrier, means for moving the carrier and automatically stopping the carrier, and in the details of construction hereinafter described and claimed.

In the accompanying drawings, Figure 1 is a side elevation. Fig. 2 is a plan View. Fig. 3 is an end elevation. Fig. 4 is an isometrical representation of one of the clamps detached from the machine. Fig. 5 is a vertical sec` tion of the automatic stopping device. Fig. 6 is a transverse section on dotted line o., Fig. 5. Fig. 7 is an isometrical representation of the trip-lever for stopping the machine. Y

In gluing boards employed in the make-up of articles of furniture it has been customary to place a series of clamps on benches, placeI the material to be glued in the clamps and tighten them up', and then carry the clamps and material some distance from the benches and allowing the glue to set, after which the clamps and material are returned to the benches and the material taken from the clamps. The operation consumed more time in carrying the clamps and material from and to the benches than was consumed in placing the material in and taking it out of the clamps. By my improvements I propose to employ mechanical devices for carrying the clamps and material away from the place Where the gluing is lcarried on and returning them When the glue is set. I accomplish this by the employment of an endless carrier, which is moved slow enough that when a complete trip is made the glue has had time to set. The main frame in this instance comprises the horizontal upper bars 1 and legs 2secured to the base 3. Boxes 4 are secured to the upper face of the horizontal portions of the main frame. Twoshafts 5 and 6 are supported by the boxes. The shaft supports two heads 7, each in this instance being four- 'porting a dog 28.

sided. The shaft 6 supports two heads 8,

each in this instance being four-sided. Two endless chains 9 and 10 form a connection between the four heads, and the links are ofthe same length as the sides of the heads. At the point of connection between the links of the chains is located a roller 11, which rests upon the support 12, secured to the main frame, and asupportl, connected to the main frame, receives the rollers and holds the chains e1e vated in their return movement. Each pair of links of 'the chains is connected by rods 14 and 15' and located near the pivotal connection between the-links.

At Fig. 4 is shown one of the clamps in con nection with the rods 14 and vl5. Abracket 16 has its lower end provided with a semicircular recess 17 ,of a size to receive the rod 15, and the upper end has a recess 18. To the upper end of the bracket is secured a clamping-plate 19 by a thumb-screw 20. A bar 21 has a connection with the bracket 16 and eX- tends at substantially right" angles thereto. This bar supports an abutment 22 near its inner end and a screw 23 near its outer end. These clamps are connected to the rods 14 and 15 and held in place thereon by the plate 19 and thumb-screw 2O and can be adjusted in the lengthwise direction of the rods, and a series of these clamps can be supported by a pair of the rods. To one end of the shaft 6 is secured a ratchet-Wheel 24, having four teeth. 1A counter-shaft 25 is supported by the main frame and has a crank-head2@ secured to one end. An arm 27 has a pivotal connectionl on the shaft G, its upper end sup- A link 29 has one end connested to the upper end of the arm 27 and its other end to the crank-head. A cam 30 is secured to the shaft 25. To the base of the machine are secured two brackets 31, towhich are pivoted the uprights 32, connected by a cross-bar 33. VA link 34 has one end pivot-ally lconnected to the base of the machine and its fr ee end pivotally connected to an arm 35 intermediate its ends, one end of this arm havin'g a pivotal connection With one of the uprights 32, and its other end supports a roller 36,against which the cam 30 moves. A spring 37 has one end connected to the main frame and its other end to one 'of the uprights 32.

That portion of the shaft extending beyond its support has a keyway 3S formed therein. A key 39 is located in the keyway and has a pivotal connection with the shaft. A spring is located behind the key. The drivingpulley 4l is located on the shaft 25 and has a keyway 42 formed in its hub portion. When the keyway of the driving-pulley coincides with the key 39, lthe key will be forced into the keyway, thereby forming a connection between the driving-pulleyand shaft 25,which will rotate the shaft in the direction indicated by the arrow. The rotation of the shaft will rotate the crank-head 26 and cam 30, which will carry the link 29 and dog 28 downward, and as the dog engages one of the teeth of the ratchet-wheels 24 the ratchet-wheel will be rotated a qu arter of arevolution during the rst half-revolution ofthe crank-head, and the dog will be returned to its starting position during the remaining half-revolution of the cranky head,which will move the clamps at the front end of the machine-from a horizontal position to a vertical position. The first half of a revolution of the cam 30 will force the frame composed of the uprights 32 and bar 33 into the position shownin dotted lines, which will allow the clamps to pass the bar 33, and after the advancing clamp has attained its horizontal position the remaining half-revolution of the cam will allow the spring to return the bar 33under the clamps and support them.

It is necessary that the movements of the chains be automatically stopped after the advancing clamp has assumed its horizontal position, and for accomplishing this purpose I have located a cam composed of the two surfaces 43 and 44, having a pivotal connection with a suitable support, and a rod 45, extending within reach of the operator, serves to turn the cam. The cam-surface 43 is located within the path of the projecting end of the key, and as the key revolves it will move up this surface until it is free of the keyway in the hub of the driving-pulley, which will break the connection between the shaft 25 and driving-pulley 41, thereby allowing the pulley to constantly `rotate and the shaft to remain at rest. By moving the cam into the position shown in dotted lines, Fig. 5, the spring 40 will force the key out into the keyway of the driving-pulley, thereby forming the connection between the driving-pulley and shaft 25. As the driving-pulley revolves it carries a projection 46, which will move in contact with the cam-surface 44 when the cam-surface is in the position shown in dotted lines, Fig. 5, and will move the cam.into the position shown in solid lines in order that the camsurface 43 may be in position to receive the `projecting end of the key.

In starting the machine the operator simply turns the cam 43 from the position shown in solid lines, Fig. into the position shown in dotted lines, and after a revolution of the shaft 25 has been completed it will be automatically stopped. The boards after being glued are placed on the clamps atthe frontend of the machine and securely held together by the screws of the clamps. The machine is then started, which will bring a new set of clamps into position to receive boards, and the operation is repeated until all the clamps 'have been filled with boards, and bythe time the clamps first lled with boards reach the operator the glue will be set, and the boards can be removed and others substituted.

The clamps can be adjusted in the lengthwise direction of the rods 14 and l5 to receive boards ofdiiferent lengths, and more than two clamps can be employed for each pair ofrods, as the lengths of the boards may require.

I claim as my inventionl. The combination of a main frame, two shafts, an endless carrier supported by the shafts, clamps supportedv by. the carrier, means for moving the carrier, and means for automatically stopping the'carrier when each set of clamps completes a revolution.

2. The combination of a main frame, two shafts, an endless carrier, clamps supported by the carrier, means for moving the carrier and a support for one set of clamps when the carriers are at rest.

3. The combination of a main frame, two

shafts, an endless carrier, clamps supported l by the carrier, means for moving the carrier, a support for one set of clamps when the carrier is at rest, and means for moving thesupport from under the clamps.

4. The combination of a main frame, two shafts, an endless carrier, clamps supported by the carrier, means for moving the carrier,

,a support for one set of clamps when the carrier is at rest, and means for moving the sup-v IOO IIO

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