US919761A - Mechanical seal. - Google Patents

Description

Wnws as F. P. PFLEGHAR. MBCHANIUAL SEAL. I APPL'IGATION FILED 11.13, 190.2,

Patented Apr. 27,1909.

THE NORRIS PETERS 9a., WASHINGTON, o. c.

FRANK r. .PELEGHAR, OFnEw'HAvEN, CONNECTICUT.

MECHANICAL SEAL.

Specification of Letters Patent.

Patented April 27, 1909.

Application filed. March 13, 1908. Serial No. 420,835.

To all whom it may concern:

Be it known that I, FRANK P. PFLEGHAR, a citizen of the United States, and resident of New Haven, in the county of New Haven and State of Connecticut, have invented "a new and useful Improvement inilVIechanical Seals, of which the following is a specification. 7

My invention relates to a mechanical seal with the object in view of providing a simple and effective seal of this character.

A practical embodiment of my invention is represented in the accompanying drawings, in which- Figure 1 is a view of the seal in side elevation showing in full lines the positions the parts occupy when the seal is locked and in dotted lines the position which the shackle may assume before it is locked, Fig. 2 is a section through the casing taken edgewise and showing the locking spring and locked end of the shackle in top plan as Well as the retaining ledge for holding the spring out of locking position, Fig. 3 is a section through the casing and parts therein in the plane of the line AA of Fig. 2, Fig. 4 is a section through the casing, similar to that shown in 'Fig. 2, but showing the locking spring out of locking engagement, Fig. 5 is a plan view in detail of the free or looking end of the shackle, Fig. 6 is a section in the plane of the line BB of Fig. 4, Fig. 7 is an edge view indetail of the locking spring, and Fig. 8 is a top plan view of the same.

The part of the shackle which is permanently secured to thecasing is denoted by 1 and the part which is to be inserted and locked within the casing in adjusting the seal for use, is denoted by 2.

The 1part 2 is provided with openings 3 and 4, in t e present instance-out oftransverse alinement for the urpose of receiving the hooked ends of the ocking spring.

The casing is denoted by 5 and may be made from a single piece of sheet metal'properly stamped into a flattened elongatedform with its upper and lower surfaces struck outwardly to furnish room for the play of the operating arts. I

I have s own, within the casing 5, a plate 6 which may be provided-with an elongated opening 7 and maybe folded at its forward end toward the mouth of the casing to form a ledge 8 for temporarily holding one branch of the locking spring out of locking osition and for the purpose of retaining t c said locking spring against any unintentional displacement during the handling of the seal before its use, I prefer to provide the ledge 8 with depressions or corrugations 9.

v The locking spring consists of an irregular. U-shaped piece of spring metal, the branches 10 and 11 of whichproject in the same general direction from the bight 12 but are not opposite one another, the branch 11 being located toward one edge or side of the casing 5 and adapted to spring through the o ening 7 in the ledge plate 6 while the branc 10 is near the opposite edge or side of the casing.

The free ends of the branches 10 and 11 are provided with hooked portions 13, 14, directed inwardly and these hooked portions are adapted to rest before the seal is used in the position shown in Fig. 6, the hook 13 resting on the corrugated portion of the ledge 8 and the hook 14 resting on the ledge plate 6 in proximity to the end of the opening 7.

The opening 15 at the end of the casing is made just wide enough to receive therein the two parts 1 and 2 of the shackle and the part 2 of the shackle is intended to slide along the part 1 between the endsof the hook portions 13, 14, of the spring until it reaches the bight 12 of the locking spring when its end will engage within the bight 12 and the further inward push on the part-2 of the shackle will slide the locking spring bodily along within the casing relieving the hook 13 from its supporting ledge and the hook 14 from its supporting ledge and permitting these hooks to pass through the openings in the end 2 of the shackle, the hook 13 passing through the opening 4 and the hook 14 passing through the opening 3 as clearly shown in Figs. 2 and 3. These hooks having once been permitted to spring toward one another and adjust themselves in the openings 3 and 4, the end 2 ofthe shackle is permanently locked within the casing against any possibility of displacement save by distortion or breaking of theparts, which can' be readily observed by the eye of the inspector.

Any attempt to draw the spring piece forward after it is once engaged with the end 2 of the shackle is prevented by the engagement of the outer face of the hook 13 with the end of the ledge piece 8 and the outer end of the hook 14 with the end wall of the open- A mechanical seal comprising a suitable I being adapted to enter the casing between casing, a spring having a general UEshape, the hooked branches of the locking spring to the branches of said spring being of different slide the spring bodily within the casing, lengths and laterally offset from each other thereby forcing the spring out of its nonand provided with hooked ends, the hooked lockin portions of the ends extending in opposite l directions, means for retaining the said i engaging the shackle. spring within the casing with the hooked l In testimony, that I claim the foregoing as ends of its branches separated and retained my invention, I have signed my name in its locking position with both hooked ends against unintentional displacement, and a presence of two witnesses, this ninth day of 3,5

shackle having one end permanently secured M arch, 1908. to the casing and the other end provided with a plurality of perforations out of trans l \Vitnesses: verse alineinent for receiving the hooked MAE D. CONATY,

ends of the spring, the said perforated end FRANCES I. MARTIN.

FRANK P. PFliEGl-IAR.

position and permitting it to occupy an

Images