US1222026A - Mail-crane. - Google Patents

Description

H. H. POLLOCK.

MAIL CRANE. APPLICATION FILED JAN. I2. 1916- Patented Apr. 10, I917.

WITNESS? INVENTOR.

ATYOR N E Y5.

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barren *ra ATZNT lt h lifilth MAIL-CRANE.

Specification of Letters Patent.

' Patented Apr. 19,,19TZ.

Application filed January 12, 1916. Serial No. 71,621.

To all whom it may concern:

Be it known that I, HENRY H. POLLOCK, a citizen of the United States, residing at Carnegie, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Mail- Crancs, of which the following is a specification.

The invention relates to mail crane constructions, and has for its primary objects, the provision of an improved apparatus, (1) which is cheaply and simply constructed, (2) which is strong and durable, (3) in which the delivery device is not liable to get out of order, and (4:) in which the delivery apparatus will accommodate mail bags of difierent lengths. One embodiment of the invention is illustrated in the accompanying drawings, wherein Figure l is a side elevation of the crane with a mail bag shown in dotted lines thereon, and Fig. 2 is a front elevation of the crane.

The framework of the crane comprises two uprights 1, 1 in parallelism at their upper ends, as indicated in Fig. 2, and spreading apart in reverse v form at their lower portions. These uprights are formed of commercial sections and are preferably secured together at their upper portions by means of the plates 2 and 3. The uprights are braced from their front sides by means of the bracebars t which cross each other indicated in Fig. 2, such bars being socured at their upper ends to the uprights, and being spiked to the ties at their lower ends, such method of fastening also being employed at the lower ends of the uprights. in order to provide a ladder, a bar or strip 5 is employed, such bar being bent laterally at its upper end (Fig. 2) and secured by means of the bolts 6. The rungs 7 preferably consist of pipe sections which act as spacers with bolts extending therethrough.

Pivot-ed between the upper portions of the uprights 1 are the arms 8 and 9, provided with the usual pivoted fingers 10 for en gaging the loops at the end of the mail bag '11. the weight 12 for swinging it to vertical position when not in use, and when such arm is in use, as indicated in Fig. 1, it engages the cross plate 2, which thus acts as a stop.

The upper arm is provided with- The lower arm 9 is mounted so that it will swing down to vertical position when not in use, and is provided at its inner end with the crank 18. When the arm 9 is in use, as i11- dicated in Fig. 1, a leaf spring l-LL secured to the frame-work, engages the crank 13 and tends to move the arm downward from horizontal position. The spring construction provides a means whereby the apparatus will. properly support mail bags of some what different lengths. The spring 14: is relatively strong and while in any position of engagement with the crank 13 causes the finger 10, on the end of the arm 9 to engage the strap on the mail bag with suilicient force to hold it securely. This obviates the necessity of employing any adjusting means for the arm 9 in order to support bags of different lengths.

T have found that the apparatus will stand long continued use without getting out of order, and that it will properly hold all the difierent sizes of mail bags that are in use. The frame-work is cheaply constructed and of great rigidity. Other advantages incident to the construction will readily be apparent to those skilled in the art.

What I claim is:

1. in combination in a mail bag crane, a pair of spaced frame members, an upper arm pivoted to the upper ends thereof, a lower arm pivoted between the members and provided with an end at an angle thereto projecting to the roar of the frame members when the arm is in horizontal position, and

a leaf spring lying to the rear of the frame members and pressing upon the said end of the arm when the arm is in horizontal position.

2. In combination in a mail bag crane, a pair of spaced frame members, an upper arm pivoted to the upper ends thereof, a lower arm pivoted between the members and provided with an end at an angle thereto projecting upwardly between the frame members when the arm is in horizontal position, and a leaf spring secured at its upper end to the frame members with its lower free end pressing upon the said end of the arm when the arm is in horizontal position.

HENRY H. POLLOCK.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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