US28649A - Shingle-machine - Google Patents

Description

Unirn JOHN D. OHISM, OF ALBANY, NEW YORK.

SHINGLE-MACHINE.

Specification of Letters Patent No. 28,649-, dated June 12, 1860.

To all whom it may concern:

Be it known that I, JOHN D. CHIsM, of Albany, in the county of Albany and State of New York, have invented a new and useful improvement in the mode of constructing apparatus for adjusting and regulating and gagingthe required motion of oscillating or rocking head-blocks when attached to feed-racks of shingle-machines which work the sliding or rocking headblocks with greater regularity than other contrivances, preventing them from slipping back, and possessing other advantages which will be herein clearly and distinctly specified.

The nature of my invention consists in providing a device by which oscillating head blocks of shingle machines may be adjusted and regulated with accuracy, minuteness and precision of motion.

The various devices now in use as applied to the feed motion of oscillating head blocks of shingle machines do not operate with that degree of accuracy and uniformity so essential to the interests of the manufacture of shingles, &c., as the bevel formed by oscillation varies very much while in operation, thus producing much irregularity in the taper as well as thickness of the shingles. Neither do they admit of cutting shingles of such minute grades of thickness as is required. I am aware that there are several inventions extant which have been introduced for the purpose of obviating those difficulties but have found none to fully answer the expectations.

In the practical operation of this invention and in its adaptation and use it is not material as to any particular form or construction of a feed rack or block nor the particular manner in which the advance or reverse motion is applied as that may be done in various ways to which this invention may be applied. Forthis purpose I construct a head block (prefer cast iron) of any required form or size and provide it with the usual clamps, racks and pawl. At the bottom of this head block I provide a chamber formed by a projecting flange attached to the head block. I then provide a feed rack with the required notches having at its forward end a cross bar permanently attached; and I do hereby declare that the following is a true and exact description reference being had to the accompanying drawings in which- Figure 1, is a perspective front elevation of a shingle machine, Fig. 2 is a vertical sectional view of the same machine with the knife plate elevated. Fig. 3, is a hori- Zontal sectional table view of the required clamps, cam and pawl attached to the feed motion. Fig. 4 is a vertical sectional side view of the same machine, preferring this class and form of a knife cutting machine by which to represent the nature and object of my invention. Fig. 5 is a horizontal sectional view of my adjustable head block.

F is a section of pitman.

G is the lower chamber of the head block which is of sufcient width depth and length for the purpose required. N is a recess in the chamber being of sufficient capacity to admit the required oscillating motion in which the cross head or bar I. (attached to the feed rack) is placed and secured with a hinge bolt.

For the purpose of securing any desired taper to the shingle and producing a uniformity of motion in its operation I insert two setscrews near each end of the cross bar I in the outer flange of recess N by which the exact amount of oscilating motion required, is regulated as shown by M, M, and it will be seen that by this simple device the utmost precision of thickness and form of taper is obtained and also the oscillating motion may at any time be arrested and boxes or other stuH may be manufactured of equal and uniform thickness, and it will also be seen that by this flange recess being inverted and rests over the cross bar I it forms a cover to that portion of the machinery thus protecting it from chips, saw dust, etc. This invention may be attached to and operated by any of the class of shingle machines here represented or to sawing machines.

I-Iaving ascertained by practical experience that much diiiiculty existed in regulating the feed motion with any degree of precision or minuteness, for the purpose of obviating that difficulty I have invented an Aimprovement in a feed lever. This improveable screw operated in a yoke 0r similar device by which the fulcrum of this lever bar is contracted or expanded as may be required, as shown by IV, in Fig. 4. NeXt and near this adjustable screw is attached the fulcrum of the feed paWl With the handle bar attached as shown by lo, the lever bar T resting at its end in an adjustable slotted bar. This paWl or clutch dog is held in its proper position to the feed rack by a spiral spring attached to the lower end of the paWl and bar T. It Will be seen by this arrangement that fulcrum of this pavvl is adjustable both vertically and laterally by Which the feed motion isvregulated at the will of the operator with minuteness and the utmost precision and regularity, thus admitting the operator to manufacture the article required of any thickness however minute the variation.

I desire it to be understood that I do not Wish to confine myself to any particular form or construction of a shingle machine nor the manner of attaching and operating my invention by any particular device for feed motion, as all this may be done in various Ways by various devices and on differently constructed machines and therefore all letters of reference appearing upon the accompanying drawings not specifically noted in this application are nugatory and may be erased.

Having thus described the nature of my invention I do not claim any new device as a feeding motion nor do I claim any particular mode or device for putting my invention in practical operation as it admits of various adaptations-but Vhat I claim is my invention and desire to secure by Letters Patent is- The cross bar I as attached to the rack feed bar J in connection With the recess or chamber N in the oscillating feed h'ead G all in the manner and for the purpose specilied, and these parts or means I only claim when they are connected With the adjustable lever feed bar T With the lateral adjustable screw l/V and feed pawl attached to handle U regulated by the spiral spring as represented all for the purpose and in the manner specified.

JOHN D. CHISM.

Witnesses:

WM. A. ALLEN, JOHN BRENNAN.

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