US71614A - Improvement in head-blocks foe saw-mills - Google Patents

Description

i @stuiten tatrafglatent @fitta JONATHAN Al. HAYNES, OF BEDFORD, ASSIGNOR TO HIMSELF AND SAMUEL IMPROVEMENT IN HEAD-BLOCKS FOR SAW-MILLS.

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TO ALL WHOM IT MAY CONCERN:

Be it known thatiI, JONATHAN P. HAYNES, of Bedford, in the county of Hillsboro, and State of New Hampshire, have invented a new and useful Improvement in Saw-Mills; and I do hereby declare the following to be a full, clear, and exact description thereof, reference boing had to the accompanying drawings, figures,

and letters of reference thereon, making part of this specification. In the said drawings- Figure 1 represents a front view, in perspective, of the carriage.

Figure 2 is a view of the cranks and connections.

Figure 3 is a top view of the left-hand block.

Figure Lis an under side view of the same; andv Figures 5, 6, and 7 are side, rear, and bottom views of the left log-rest.

Similar letters of reference indicate like parts in all the accompanying drawings.

' My invention consists, first, in a novel combination and arrangement of parts for operating the set of the log upon the carriage; second, in a novel combination and arrangement of parts for readily determining the set of the log; third, in a novel combination and arrangement of parts for connecting and disconnecting the traversing-gear from the rests, so that the rests can be operated quickly.

To enable others skilled in the art to make and use my invention, I will describe the `construction and operation thereof.

A represents the bed of the carriage, secured together-by cross-bars B B, as shown in figs. 3 and 4. D D are the log-rests, which traverse on the blocks C C. E is the rod, which connects the racks P P by means of the bell-cranks G G. H is the hand-lever attached to the shaft F, for operating the set. I I are adjustable stops on the rod E, to regulate the extent of motion of the lever H, and consequently of the log-rests D Dl These stops strike against the slotted bar K, secured'to the right-hand block, shown in figs. 1 and 2. L L are the boxes for the journals ofthe bell-cranks G G, the continuation of the right-hand journal forming the shaft F. Mis a circular block,'playing freely upon the end of the upright shaft N, and to whichone end of the metallic graduated tape m is attached, the .other end being secured to the upright O. Theinner end of the coil spring n is Asecured to the shaft N, while the-outer one is attached to a pin in the under side of the block M. To the end of the shaft N. is attached the index-finger o. The shaft N being secured to the log-rest D, the distance the rest has travelled is shown on the measure m by the index o. Mounted upon the `log-rests D are small shafts, c, arouhd which are springs, e, the upper ends of which are secured to the projections a, and the other ends to the collars on the shafts c. The upper ends of the shafts are secured to the arms b,-and the lower ends to the pawls 7c, as shown in figs. 6 and 7. The small eccentrics and handles d, mounted inthe projections u, are for the purpose of throwing the. pawls z' la clear ofl the. racks Pp, when it is required to move the rests D. Upon the inside of the rests D are shown small pawls, z', which are thrown outward by the spring h,- and eng'age with the racks p' on the inside of the blocks C, as represented in fig. 4, and which prevent anyretrograde movement of the rest-s.' The pawls c and i are so arranged that they are thrown out of cr into gear at the same time by the movement of the handles d. When both -of the pawls-are clear of the ratchets, thelog-rests may be moved to any desired position, and then be thrown into gearby a slight turn of the handles d. The rests D are grooved, as shown, to slide in the blocks, and are furnished with a series of dog-holes, for (logging the log in any desired position by 'means of. the dogs l. In .the b ar E there is a series of holes, and on the side of the carriage there is a series of stops, for adjusting the blocks C C any desired distance apart, which is accomplished by with= drawing the pin in the left crank Gr, moving the block to the desired position, and then inserting the pin. The left-hand block C is provided with a scale, and its log-rest with a pointerr r, for facilitating the adjustment of logs which are tapering or crooked.

ff Operation. The operation will be as follows: The log is placed upon the carriage-blocks C C, which have been adjusted to the proper distance, and dogged firmly by means of hooks pivoted to the rests -D D, in the ordinary manner, and the log is set by'simply working the lever H back and forth, the rests D being moved simultaneously. The

distance they have travelled is indicated on the tape m by the index ai The position 'of the hand-lever and tape m enables one person to set the log with great ease, and every board is cut of a perfect thickness.

My improvements are applicable to all saw1i1ills,a.nd the whole apparatus is simple, with but little friction, and is easily operated at a great lsaving of labor and time.

Having thus described my invention, what 1 claim, and desire to secure by Letters Patent, is- 1. The arrangement of theratchet-bar P and finger 7c in connection with and for operating the knee D, all constructed andoperating substantially as described and specified.

2. The arrangement of the tape-measure m, index-finger o, and spring n, mounted on the 'shafts O and N,

for registering the set of the log, all constructed and operating substantially as described and specified.v

3. The arrangement of the eccentric-handle d', a-rm b, shaft c, and the pawls z'and c, for disconnecting the traversing-gear, so that the knees D are free to be moved in either direction, all constructed and operating substantially as described and specied.

' J. P. HAYNES.

Witnesses:

ISAAC RIDDLE, B. A. CILLEY.

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