US103746A - Improvement in machine for grooving lead-pencil blanks - Google Patents

Description

P. HUFELAND.

MAGHIN'E FOR GROOVING BLANKS FOR LEAD PENUILS. N0. 103,'746. Patented May 31. 1870.

PHILIP nUF LAa-D,

or new YORK, N. Y.

Letters Patent No. 103,746, dated May 31, 1870.

IMPROVEMENT IN MACHINE FOR GROQVING- LEAD-PENCIL BLANKS.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern:

Be it known that I, PHILIP HU'FELAND, of the city, county, and State of New York, have invented a new and improved Machine for Grooving Blanks for Lead-Pencils, &c.; and I do hereby declare the following to be a full, clear, and exact description thereof, which will enable those skilled in the art to make and use the same, reference being had to the accompanying drawing forming part of this specification, in which drawing-- Figure 1 represents a plan or top view of this invention.

Figure 2 is a sectional side elevation of the same.

Figure 3 is a partial transverse section of the same.

Similar. letters indicate corresponding parts.

This invention relates to a machine for grooving the blanks of lead-pencils. v

These blanks consist of thin boards, each of the length of a pencil, and usually wide enough for six pencils, and they are exposed to the action of a revolving cutter, which produces in their surface six square grooves, just large enough to receive the leads.

.The subject-matter of this application consists in the combination and arrangement of certain parts hereinafter to bemore fully described.

The blanks are fed to the grooving-cutter automatically, by means of a cog-wheel mounted on a shaft, to which a revolving motion is imparted by a pulley held on it by a friction-clutch, in such a manner that, if from some cause the pusher meets with 'amundue'resistance, the pulley on the pusher-shaft slips,-and injury to the machinery is avoided.

After having advanced the required distance, the pusher is pulled back to its original position by a weight.

The grooving-cutter is protected by a hinged cap, and on the cutter-shaftis mounted a fan-blower, inclosed in a case in such a manner that by its action the dust created by the action of the grooving-cutteris drawn off and expelled through a suitable tube, thereby saving the workmen from being annoyed by such dust.

In the drawing- The letter A designates a' frame which forms the befiarings for the working parts of the grooving-mac me.

From one side of this frame projects a platform, B, on which the blocksto be grooved are fed to the cutover the platform B, and which is open at the bottom, so that one of the blanks after the other canbe pushed out from below.

This operation is effected by means of a pusher, F, which rests upon the platform B, and is provided with cogs a at its under surface, to gear into a segmental cog-wheel, b, which is mounted on a shaft, 0.

On this shaft is placed loosely a pulley, d, which is pressed up, by means of a spring, 6, against a fric tion-disk, f, so that a belt stretched oversaid pulley will impart to the shaft a revolving motion, and the pusher will be carried-forward in the direction of the arrow marked thereon in fig..2; but if the pusher, from some cause, meets with an undue resistance, the

pulley (I will slip on its shaft, and injury to the mechanism will be avoided;

By increasing or decreasiu g the tensionof the spring 0 the maximum pressure of the pusher can be determined. \Vhen the pusher has advanced the desired distance, it is released by the segmental wheel jb, and pulled back by a weight, 9, attached to it, as shown in fig. 2, while the-shaft c continues to revolve, and" serves to -carry the pusher forward again on -its next revolution. I

A stop, 7t, projecting from the frame A, prevents the pusher from being drawn back beyond the required position.

After leaving the hopper, each blank is exposed to the action of pressing-rollers 1', each of which is -monnted onasepapate slide, and subjected to the action of its own spring, and which acts on the outer edge of the blank, serving to keep the inner edge thereof up against the gauge j, which rises from the frame A, best seen in fig. 3. of the drawing.

These pressing-rollers are necessary, because the blanks are sometimes not exactly of uniform width, and sometimes one edge of a blank-which, in that case, is kept outward-is rugged, so that, without the pressing-rollerssuch blank would not be held tight while being exposed to the action of the groovingcutter, and the grooves would not become as uniform as required. But, by the action of the pressing-rollers, the inner edges of each blank are kept close up to the gauge, and neither-bf the blanks is allowed to become displaced while passing through under the grooving-cutter.

Suitable feed-rollers Zt'k serve to push the blanks along between the gauge and the pressing-rollers, and also under the grooving-cutter.

On the cutter-shaft D is mounted a fan-blower, G, which is inclosed in a case, H, the top of which is hinged, so that it can be turned back, and'which communicates with the' interior of 'a'cap,.I, that covers the grooving-cutter, so that, by the action of the fan, all the dust created by the action of the cutter is sucked in and expelled through the discharge-pipe J The cap I is hirigecl, so that'it can be turned back to give access to the cutter.

What I claim as new, and desire to secure by Letters Patent, isv 1. The pressure-roller 2', gauge j, and cutter 0, when arranged in relation to each other and operating in connection with the pusher F, friction-pulley (I, and hopper E, substantially as herein shownand described.

2. The arrangement of the case H and cap I with" the grooving-critter and fan-blower, mounted on one and the sameshaft, substantially as described.

.PIIILIP HUFELAN'D.

Witnesses W. HAUFF, E. F. KASTENHUBER.

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