US1630517A - Xknute b bbhgeb - Google Patents

Description

ama? R May 31, 1927 BERGER SNATCH BLOCK Filed Au 1926 ATTORNEY Patented May 31 1927.

KNU'TE BERGER, OF SEATTLE, \VASIEENGTON.

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Application filed August 2, 1926. Serial No. 126,603". i

My invention relates to improvements in snatch blocks and the object ot the invention is to provide a snatch block comprising two ll-shaped frame mcn'ibers piv iitallyheld together in such fashion that a dog pivoted to one member serves to prevent the line from disengagement with the sheave carried by the other member and also i-erves as a stud spacer to counteract heavy strains that would tend to collapse said frame men'ibers. Further objects are to provide simple means tor removing the lines by pivotal movement of the smaller Ushaped member carrying' the pivoted dog out of engagement with the larger U-shaped member.

With the above and other objects in view which will appear as the description proceeds, the invention consists of the novel construction, adaptation, combination and arrangement of parts hereinatter described and claimed. I accomplish these objects by devices illustrated in the accompanying drawings, wherein:

Figure 1 is a view in elevation showing a tackle block embodying the features of the invention Fig. 2 a view in elevation showing the method of pivotally opening the device and removing the lines therefrom; and

Fig. 3 is a view in horizontal section taken substantially on line 3. 3 of Fig. 1.

Referring to the drawings throughout which like reference numerals designate like parts, the numeral 5 indicates a relatively large, substantially U-shaped lower member that is provided with a sheave 6 rotatively mounted on a stud axle 7. A relatively small U-shaped upper member 8 is pivotally secured to said large Ushaped member by a pivot pin 9. As shown in Fig. 1 said members may be locked together in the closed position by a pin 10 passing through eyes 11 and 12 respectively in said lllQIDl'JOlS.

The opening between the legs at the lower member 5 is enlarged scent the periphery of the sheave 6 to form a substantially triangular slot 13 with rounded corners in conjunction with the grroove in said sheave. A dog 14 pivoted at 15 to the upper member 8 is provided at one end with an cnlarged head portion 16 that serves as a closure tor said triangular slot when the device is in the closed position.

Besides serving as a closure for the slot 13 the head portion 16 of the dog" 14: also serves as a means for retaining the legs of the ower member in spaced relation to preent heavy strains from drawine said legs her as more fully hereinafter set forth. s clearlyshown in in. 3 ol the drawings the head of said dog; is provided with spaced cs 1'? that overlap projections 21 posed on said legs 25 and retain the dog in snugengagement therewith.

A bight. oi": a line 18 maybe passed through the loop of the lower member 8 for fastening the device to any desired stationary object. A runningline 19 may be passed around the sheave 6 for pulling the load fastened thereto. The device is designed for moving heavy objects and it will be obvious that the longitudinal strain caused thereby would tend to draw the legs of the lower and upper memjam and ultimately causing the legs 25 t collapse. To offset this tendency the 'dog 14 is adapted to hold said legs in propel spaced relation a gainst all strains.

When the device is in the closed position the line 19 cannot escape from the sheave 6 by reason of the head of the dog 14 serving as a closure for the triangular slot 13. The corners of said slot are rounded to prevent chafing of said line and even though the line should become slack and slip out of the groove in the sheave said triangular slot will always serve as a guide to direct the line 19 back to the sheave whenever said line again becomes taut and the bigzht of the line 18 is confined within the space above the head of the dog 14 thereby preventing the lines from interfering with one another.

Referring to Fig. 2 of the drawings, whenever it is desired to disconnect the lines from the device it is merely necessary to remove the pin 10 when the men'iber 8 may be swung; outwardly carrying the doe- 14rtherewith and leaving both U-shaped members open between their for withdrawal of the lines. This feature has a distinct advantag in the fact that the bight of the running line 19 may be slipped of? without the necessity of reevin in to its end which is usually of considerable length. When the device is open the bights of both lines may, of course, be as readily and conveniently installed. and upon closingthe members the dog will slide easily into position by reason ot its pivotal connection.

Although I have described the device in considerable detail it will be understood that I intend no limitations except in so far as dis bers 5 and 8 together causing said sheave to me be imposed by the appended claims, an that I reserve the right to resort to such changes as do not depart from the scope and spirit of the invention.

What I claim is 1. A snatch block comprising two sub stantially Ushaped members, the adjoining legs of said members secured together on one side for pivotal movement. means for locking the adjoining legs together on the other side, a sheave'rotatively carried by one of the members, said sheave carrying member having an enlarged slot adapted to guide arunning line into engagement with the sheave, a dog pivotally connected to the other member, and adapted to serve as a closure for said slot and as a means for retaining the legs of the U-shaped members in spaced relation.

A snatch block comprising an upper member and a lower member pivotally connected, legs on said lower member having projections thereon, means for locking said members together, a dog pivoted at one end to said upper member the other end being 25 provided with a head having spaced flanges that are adapted to overlap said projections on sand lower member, and a sheave carried by said lower member.

In witness whereof, I hereunto subscribe myname this 20th day of July A. D. 1926.

. KNUTE BERGER.

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